Quang Huy Le - Academia.edu (original) (raw)

Papers by Quang Huy Le

2019 IEEE Asia-Pacific Microwave Conference (APMC)

In this paper, a comprehensive analysis on small-signal modeling of mm-wave transistor in 22nm FD... more In this paper, a comprehensive analysis on small-signal modeling of mm-wave transistor in 22nm FDSOI technology is presented. The model is constructed based on experimental S-parameters up to 110 GHz of a 22FDX® thick-oxide n-MOSFET and analytical parameter extraction approach. The non-quasi static effect is addressed thoroughly in the equivalent circuit model for high frequency validity. The bias-dependent series source and drain resistances are considered to account for the overlap regions between the gate and the highly doped source/drain regions. In addition, a simple RC network is included at the output to model the innegligible substrate coupling at mm-wave frequencies. Excellent agreements between model prediction and measurement are observed in the interested bandwidth for various bias conditions.

Asian Journal of Applied Science and Technology

Vinamilk is the leading enterprise of the dairy processing industry in Vietnam. In addition to pr... more Vinamilk is the leading enterprise of the dairy processing industry in Vietnam. In addition to product quality that many customers trust, Vinamilk's brand is also known by many famous and effective marketing strategies and campaigns. By observations and qualitative analysis with synthesis and inductive methods, and quantitative model (econometric), study results shows that first, Vinamilk can increase net profit through reducing cost and increasing sale. Also it needs policy to reduce inflation and risk free rate to increase its profit. Last but not least, one of its success factors is that Vinamilk is paying great attention to improving and supplementing its new product categories. And finally, the company also organized 3 distribution channels successfully.

Asian Journal of Basic Science & Research

Over years, Hoi An Tourism Holding Company (HOT) is not only contributes to solving local labor, ... more Over years, Hoi An Tourism Holding Company (HOT) is not only contributes to solving local labor, contributes to the state budget, but also actively takes care of social security issues. Marketing strategy for HOT can include: Creating a package product and creating a package travel program is one important stage in the operation of companies operating in the field of tourism industry today. Fluctuation of stock price in tourism firms in developing countries such as Vietnam will reflect the business health of tourism system. The article analyzed and evaluated the impacts of multi macroeconomic factors on stock price of a tourism company, Hoi An tourism holding co. (HOT) in Vietnam in the period of 2014-2019, both positive and negative sides. The results of quantitative research, in a quantitative model, show that Sate Bank of Vietnam (SBV) and government agencies need to control inflation and GDP, not increasing too much inflation to favor of stock price.

Asian Journal of Applied Science and Technology

Online shopping is growing at the fastest rate and gradually becoming a popular and trusted shopp... more Online shopping is growing at the fastest rate and gradually becoming a popular and trusted shopping channel of customers around the world, in which, the customer group accounts for a large proportion and tends to lead consumer behavior. Current and future online is generation Z. Therefore, this article focuses on analyzing factors affecting online shopping behavior of Gen Z in Vietnam, thereby proposing solutions to help businesses continue to approach and conquer this group of potential customers. To achieve the goal, the study conducted an online survey of 374 Gen Z e-buyers by means of convenient sampling nationwide, combined with the use of SPSS 25.0 software in factor analysis and linear regression analysis. Research results show that, STT, TDU are the factors that have a decisive impact on the online shopping behavior of Gen Z buyers.

Asian Journal of Basic Science & Research

Our study shows that BIDV, who became Best retail bank in Vietnam in recent years, has made very ... more Our study shows that BIDV, who became Best retail bank in Vietnam in recent years, has made very positive contributions to the overall achievements of the banking industry, need to clearly define the customers they want to focus on so that they can offer specific products that suit the needs of customers. Determining the right target audience also helps banks in conducting accurate pricing of products corresponding to the market segments they are brought to users, as well as distribution channels, distribute products and forms of marketing advertising to achieve the highest efficiency. We also suggest that BIDV bank focuses more on marketing 4P and 7P strategy in new context. Last but not the least, By data collection method through statistics, analysis, synthesis, comparison, quantitative analysis to generate qualitative comments and discussion; using econometric method to perform regression equation and evaluate quantitative results, the article analyzed and evaluated the impacts ...

Mediterranean Journal of Basic and Applied Sciences

Hyundai leads the automobile industry and has made very positive contributions to the overall ach... more Hyundai leads the automobile industry and has made very positive contributions to the overall achievements of economic and social values. Kang et al (2014) pointed In constructing global marketing strategy, Hyundai Motor’s vision is "Lifetime partner in mobility and beyond" and its goal is global top 3 brand by year 2015 through modern premium brand image and selling 5 million vehicles. The target brand positioning of Hyundai Motor is the leading position in premium dimension and stylish/modern dimension. The global brand strategy framework is based on the brand direction of "Modern Premium" and is designed to deliver core brand identity (i.e., Simple, Creative, Caring) to customers. Its marketing strategy shows us: - Hyundai's product strategy is to standardize technical standards with the ambition of being a global product, ensuring the best quality, aiming at the recognition of the value of the customer's product, satisfying the customer's needs. O...

2021 16th European Microwave Integrated Circuits Conference (EuMIC)

2021 16th European Microwave Integrated Circuits Conference (EuMIC)

Crystals, 2021

A microwave characterization at UHF band of a ferroelectric hafnium zirconium oxide metal-ferroel... more A microwave characterization at UHF band of a ferroelectric hafnium zirconium oxide metal-ferroelectric-metal (MFM) capacitors for varactor applications has been performed. By using an impedance reflectivity method, a complex dielectric permittivity was obtained at frequencies up to 500 MHz. Ferroelectric Hf0.5Zr0.5O2 of 10 nm thickness has demonstrated a stable permittivity switching in the whole frequency range. A constant increase of the calculated dielectric loss is observed, which is shown to be an effect of electric field distribution on highly resistive titanium nitride (TiN) thin film electrodes. The C-V characteristics of a “butterfly” shape was also extracted, where the varactors exhibited a reduction of capacitance tunability from 18.6% at 10 MHz to 15.4% at 500 MHz.

2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), 2020

This paper presents the W-band noise performance of the 22nm FDSOI CMOS technology. In detail, th... more This paper presents the W-band noise performance of the 22nm FDSOI CMOS technology. In detail, the mm-wave thin-oxide MOSFETs is characterized comprehensively in term of device geometries using the tuner-based noise measurement approach. To aid the noise analysis and extraction, the following study adopts an accurate small-signal equivalent circuit model validated well with bias-dependence up to 110 GHz. The effects of back-gate bias to the overall noise performance are also addressed in this work. The test devices exhibit low noise figure in the full W-band 75-110 GHz. Besides, NFmin of 2.8 dB and 3.6 dB is recorded at 94 GHz respectively for the n- and p-FETs with 18nm gate-length (Nf = 32, Wf = 1.0 µm). The result of this study indicates the comparable performance of the 22nm FDSOI technology to other candidates for W-band applications.

Economic Annals-ХХI, 2019

Over the past decade, Africa and other developing regions have been in the midst of tremendous ch... more Over the past decade, Africa and other developing regions have been in the midst of tremendous changes. Market liberalisation and governmental decentralisation policies have interfaced with globalisation and urbanisation trends to dramatically transform social, political, economic and cultural lives. Agriculture can no longer remain behindserving only to meet subsistence food needs. Agriculture has to become a dynamic and integral part of the market economy. If African agriculture is bypassed by the economic transformation going on world wide, then large numbers of Africans and perhaps all of Africa will remain poor and food insecure. The fundamental purpose behind the FAO initiative to strengthening farmagribusiness linkages is to help transform the agricultural sector in order to accelerate productivity growth, increase income and employment generation, improve food security, and increase competitiveness in regional and international trade. In 2001 and 2002 five country case studies on farm-agribusiness linkages were undertaken in Ghana, Nigeria, Kenya, Uganda and South Africa. The main purpose of the studies was to get an insight into current farm-agribusiness linking arrangements. This included identifying and analysing successful linkages highlighting different methods and practices as well as exploring key factors that have led to successful partnerships. The country studies also contained a brief agribusiness sector overview. The work in Africa began with preparation of five case studies which are presented as summary results as well as individually. FAO work on farm-agribusiness linkages emerged from a broader cross-regional study on farm-agribusiness linkages launched in 2000. The first stage was a series of country studies and a regional consultation in Asia. During 2001 and 2002, case studies and a regional workshop on agribusiness linkages were carried out in Latin America. This was followed by a workshop on strategies for improving negotiation and compliance capabilities, held in November 2002 in Peru. An expert consultation on strengthening farm-agribusiness linkages in Africa was held in March 2003 in Nairobi, Kenya.

2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS), 2021

This paper presents 22FDSOI device RF performance figure of merit dependencies on the design para... more This paper presents 22FDSOI device RF performance figure of merit dependencies on the design parameters, such as gate length, width per finger, number of fingers, centerline poly pitch, as well as the vertical gate repetition. With a proper design parameters combination, the device can achieve as high as 413 GHz of fMAXf_{MAX}fMAX. As a circuit demonstration, a 2-stage 2-stack power amplifier achieves an output power of 20.2 dBm and 32 % peak PAE at 28 GHz.

2019 IEEE 2nd 5G World Forum (5GWF), 2019

This paper investigates the applicability of a thick-oxide transistor from the 22FDX® for 5G NR s... more This paper investigates the applicability of a thick-oxide transistor from the 22FDX® for 5G NR sub-6 GHz front-end modules. Characterization and evaluation of the GlobalFoundries's FDSOI n-MOSFET regarding RF front-end figure-of-merits, such as output power, efficiency and linearity are discussed. Load-pull measurements are performed to extract the optimal performance. The test transistor delivers saturation power of +5.0 dBm and more than 65% of PAE while maintaining flat transducer gain of 10.2 ± 0.2 dB across the targeted frequency range for a 1.5 V single-ended class AB operation. Besides, the low PAE roll-off in term of reducing supply voltage and the particular 60% PAE at 10 dB output back-off indicate that the DUTs are well suitable for envelope tracking applications. Additional reliability tests at strong compression levels are conducted from which low performance degradation over time is observed even at 9 dB output compression.

2020 German Microwave Conference (GeMiC), 2020

The following study discusses the impact of hot-carrier degradation on high frequency performance... more The following study discusses the impact of hot-carrier degradation on high frequency performance of the 22nm FDSOI n-channel transistors. A quasi-static small-signal equivalent circuit MOSFET model is used to describe the device behavior. RF characteristics are extracted after stressing device with continuous DC. DC characteristics are also investigated thoroughly before and after stress. It is observed that, the device suffers from both interface damage and oxide defect. Accordingly, this study addresses how severe hot-carrier degradation affects the intrinsic parameters as well as the device performance.

IEEE Transactions on Electron Devices, 2021

This article presents a systematic empirical modeling approach in fully depleted silicon-on-insul... more This article presents a systematic empirical modeling approach in fully depleted silicon-on-insulator (FDSOI) CMOS for large-signal simulation in power amplifier applications. The model is constructed from multibias S-parameter measurements up to 67 GHz. The frequency dispersions in transconductance and output conductance are addressed by two independent radio frequency (RF) current sources. Angelov’s current formula is modified to adapt to the FDSOI transistors. Load-pull measurements are performed for the large-signal verification in a non-50- Omega\Omega Omega environment. The model accurately predicts the nonlinear characteristics of the device under test and the harmonic components. The time-domain waveforms also show excellent agreement to the simulation.

2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019

This paper presents a tunable 60 GHz band-pass filter, based on a coplanar waveguide (CPW) transm... more This paper presents a tunable 60 GHz band-pass filter, based on a coplanar waveguide (CPW) transmission line, periodically loaded with ferroelectric Hafnium Zirconium Oxide (HZO) variable metal-ferroelectric-metal (MIM) capacitors (varactors), developed for back-end-of-line (BEoL) integration. Derived from the nonlinear capacitance of hafnium zirconium oxide and implementing the method-of-moments simulation, it was shown, that with changing the bias voltage between 0.95 and -3 V, the filter’s center frequency can be tuned between 60.5 and 69,7 GHz, respectively. Hereby, a minimum insertion loss of -3.3 dB is realized. The chip area of the filter is only 0.062 mm2, making it the smallest among tunable V-band filters.

2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019

This paper presents a 60 GHz phase shifter, based on a coplanar waveguide (CPW) transmission line... more This paper presents a 60 GHz phase shifter, based on a coplanar waveguide (CPW) transmission line, loaded with ferroelectric hafnium zirconium oxide (HZO) variable metal-insulator-metal (MIM) varactors, developed for the back-end-of-line (BEoL) on-chip integration. Using the measured data of capacitance-voltage (C-V) characteristics of HZO and implementing the method-of-moments simulation, it was shown, that by changing the bias voltage between 0.95 and -3 V, the device shows a phase shift of 111° and a minimum insertion loss of -5.84 dB at 60 GHz. The chip area of the device is 0.206 mm2, making it the smallest among non-CMOS phase shifters.

Environmental Chemistry Letters, 2018

Membrane technology has become a common separation technology over the past decennia. Membranes a... more Membrane technology has become a common separation technology over the past decennia. Membranes are used more and more for the production of drinkable water from groundwater, surface water and wastewater. Membranes are now competitive versus conventional techniques. Desalination is predominantly used to eradicate the problem of water scarcity. The sustainability of all desalination processes depends mainly on the reduction of energy costs (production cost) and the increase in water recovery. Forward osmosis and membrane distillation are emerging technologies for sustainable desalination. Here we review membrane processes of forward osmosis and membrane distillation and the advancements in membrane material and modules. We also discuss the capability of membrane distillation in treating highly concentrated aqueous solutions derived from other desalination processes. Furthermore, the advancements in fabrication of high-performance membrane is reviewed and the performance of different membranes and optimization of membrane distillation process are summarized.

Separation and Purification Technology, 2017

Osmotic membrane bioreactors (OsMBRs) are a recent breakthrough technology designed to treat wast... more Osmotic membrane bioreactors (OsMBRs) are a recent breakthrough technology designed to treat wastewater. Nevertheless, their application in high-salinity wastewater treatment is not widespread because of the effects of saline conditions on microbial community activity. In response, this study developed an integrated sponge biocarrier-OsMBR system using highly salttolerant microorganisms for treating saline wastewater. Results showed that the sponge biocarrier-OsMBR obtained an average water flux of 2 L/m 2 h during a 92-day operation when 1 M MgCl 2 was used as the draw solution. The efficiency in removing dissolved organic compounds from the proposed system was more than 99%, and nutrient rejection was close to 100%, indicating excellent performance in simultaneous nitrification and denitrification processes in the biofilm layer on the carriers. Moreover, salt-tolerant microorganisms in the sponge biocarrier-OsMBR system worked efficiently in salt concentrations of 2.4%. A polytetrafluoroethylene MD membrane (pores = 0.45 μm) served to regenerate the diluted draw solution in the closed-loop system and produce high-quality water. The moving sponge biocarrier-OsMBR/MD hybrid system demonstrated its potential to treat salinity wastewater treatment, with 100% nutrient removal and 99.9% conductivity rejection.

Tissue mechanics and cellular interactions influence every single cell in our bodies to drive mor... more Tissue mechanics and cellular interactions influence every single cell in our bodies to drive morphogenesis. However, little is known about mechanisms by which cells sense physical forces and transduce them from the cytoskeleton to the nucleus to control gene expression and stem cell fate. We have identified a novel nuclear-mechanosensor complex, consisting of the nuclear membrane protein emerin (Emd), actin and non-muscle myosin IIA (NMIIA), that regulates transcription, chromatin remodeling and lineage commitment. Force-induced enrichment of Emd at the outer nuclear membrane leads to a compensation between H3K9me2,3 and H3K27me3 on constitutive heterochromatin. This strain-induced epigenetic switch is accompanied by the global rearrangement of chromatin. In parallel, forces promote local F-actin polymerization at the outer nuclear membrane, which limits the availability of nuclear G-actin. Subsequently, the reduction of nuclear G-actin results in attenuated global transcription an...

2019 IEEE Asia-Pacific Microwave Conference (APMC)

In this paper, a comprehensive analysis on small-signal modeling of mm-wave transistor in 22nm FD... more In this paper, a comprehensive analysis on small-signal modeling of mm-wave transistor in 22nm FDSOI technology is presented. The model is constructed based on experimental S-parameters up to 110 GHz of a 22FDX® thick-oxide n-MOSFET and analytical parameter extraction approach. The non-quasi static effect is addressed thoroughly in the equivalent circuit model for high frequency validity. The bias-dependent series source and drain resistances are considered to account for the overlap regions between the gate and the highly doped source/drain regions. In addition, a simple RC network is included at the output to model the innegligible substrate coupling at mm-wave frequencies. Excellent agreements between model prediction and measurement are observed in the interested bandwidth for various bias conditions.

Asian Journal of Applied Science and Technology

Vinamilk is the leading enterprise of the dairy processing industry in Vietnam. In addition to pr... more Vinamilk is the leading enterprise of the dairy processing industry in Vietnam. In addition to product quality that many customers trust, Vinamilk's brand is also known by many famous and effective marketing strategies and campaigns. By observations and qualitative analysis with synthesis and inductive methods, and quantitative model (econometric), study results shows that first, Vinamilk can increase net profit through reducing cost and increasing sale. Also it needs policy to reduce inflation and risk free rate to increase its profit. Last but not least, one of its success factors is that Vinamilk is paying great attention to improving and supplementing its new product categories. And finally, the company also organized 3 distribution channels successfully.

Asian Journal of Basic Science & Research

Over years, Hoi An Tourism Holding Company (HOT) is not only contributes to solving local labor, ... more Over years, Hoi An Tourism Holding Company (HOT) is not only contributes to solving local labor, contributes to the state budget, but also actively takes care of social security issues. Marketing strategy for HOT can include: Creating a package product and creating a package travel program is one important stage in the operation of companies operating in the field of tourism industry today. Fluctuation of stock price in tourism firms in developing countries such as Vietnam will reflect the business health of tourism system. The article analyzed and evaluated the impacts of multi macroeconomic factors on stock price of a tourism company, Hoi An tourism holding co. (HOT) in Vietnam in the period of 2014-2019, both positive and negative sides. The results of quantitative research, in a quantitative model, show that Sate Bank of Vietnam (SBV) and government agencies need to control inflation and GDP, not increasing too much inflation to favor of stock price.

Asian Journal of Applied Science and Technology

Online shopping is growing at the fastest rate and gradually becoming a popular and trusted shopp... more Online shopping is growing at the fastest rate and gradually becoming a popular and trusted shopping channel of customers around the world, in which, the customer group accounts for a large proportion and tends to lead consumer behavior. Current and future online is generation Z. Therefore, this article focuses on analyzing factors affecting online shopping behavior of Gen Z in Vietnam, thereby proposing solutions to help businesses continue to approach and conquer this group of potential customers. To achieve the goal, the study conducted an online survey of 374 Gen Z e-buyers by means of convenient sampling nationwide, combined with the use of SPSS 25.0 software in factor analysis and linear regression analysis. Research results show that, STT, TDU are the factors that have a decisive impact on the online shopping behavior of Gen Z buyers.

Asian Journal of Basic Science & Research

Our study shows that BIDV, who became Best retail bank in Vietnam in recent years, has made very ... more Our study shows that BIDV, who became Best retail bank in Vietnam in recent years, has made very positive contributions to the overall achievements of the banking industry, need to clearly define the customers they want to focus on so that they can offer specific products that suit the needs of customers. Determining the right target audience also helps banks in conducting accurate pricing of products corresponding to the market segments they are brought to users, as well as distribution channels, distribute products and forms of marketing advertising to achieve the highest efficiency. We also suggest that BIDV bank focuses more on marketing 4P and 7P strategy in new context. Last but not the least, By data collection method through statistics, analysis, synthesis, comparison, quantitative analysis to generate qualitative comments and discussion; using econometric method to perform regression equation and evaluate quantitative results, the article analyzed and evaluated the impacts ...

Mediterranean Journal of Basic and Applied Sciences

Hyundai leads the automobile industry and has made very positive contributions to the overall ach... more Hyundai leads the automobile industry and has made very positive contributions to the overall achievements of economic and social values. Kang et al (2014) pointed In constructing global marketing strategy, Hyundai Motor’s vision is "Lifetime partner in mobility and beyond" and its goal is global top 3 brand by year 2015 through modern premium brand image and selling 5 million vehicles. The target brand positioning of Hyundai Motor is the leading position in premium dimension and stylish/modern dimension. The global brand strategy framework is based on the brand direction of "Modern Premium" and is designed to deliver core brand identity (i.e., Simple, Creative, Caring) to customers. Its marketing strategy shows us: - Hyundai's product strategy is to standardize technical standards with the ambition of being a global product, ensuring the best quality, aiming at the recognition of the value of the customer's product, satisfying the customer's needs. O...

2021 16th European Microwave Integrated Circuits Conference (EuMIC)

2021 16th European Microwave Integrated Circuits Conference (EuMIC)

Crystals, 2021

A microwave characterization at UHF band of a ferroelectric hafnium zirconium oxide metal-ferroel... more A microwave characterization at UHF band of a ferroelectric hafnium zirconium oxide metal-ferroelectric-metal (MFM) capacitors for varactor applications has been performed. By using an impedance reflectivity method, a complex dielectric permittivity was obtained at frequencies up to 500 MHz. Ferroelectric Hf0.5Zr0.5O2 of 10 nm thickness has demonstrated a stable permittivity switching in the whole frequency range. A constant increase of the calculated dielectric loss is observed, which is shown to be an effect of electric field distribution on highly resistive titanium nitride (TiN) thin film electrodes. The C-V characteristics of a “butterfly” shape was also extracted, where the varactors exhibited a reduction of capacitance tunability from 18.6% at 10 MHz to 15.4% at 500 MHz.

2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), 2020

This paper presents the W-band noise performance of the 22nm FDSOI CMOS technology. In detail, th... more This paper presents the W-band noise performance of the 22nm FDSOI CMOS technology. In detail, the mm-wave thin-oxide MOSFETs is characterized comprehensively in term of device geometries using the tuner-based noise measurement approach. To aid the noise analysis and extraction, the following study adopts an accurate small-signal equivalent circuit model validated well with bias-dependence up to 110 GHz. The effects of back-gate bias to the overall noise performance are also addressed in this work. The test devices exhibit low noise figure in the full W-band 75-110 GHz. Besides, NFmin of 2.8 dB and 3.6 dB is recorded at 94 GHz respectively for the n- and p-FETs with 18nm gate-length (Nf = 32, Wf = 1.0 µm). The result of this study indicates the comparable performance of the 22nm FDSOI technology to other candidates for W-band applications.

Economic Annals-ХХI, 2019

Over the past decade, Africa and other developing regions have been in the midst of tremendous ch... more Over the past decade, Africa and other developing regions have been in the midst of tremendous changes. Market liberalisation and governmental decentralisation policies have interfaced with globalisation and urbanisation trends to dramatically transform social, political, economic and cultural lives. Agriculture can no longer remain behindserving only to meet subsistence food needs. Agriculture has to become a dynamic and integral part of the market economy. If African agriculture is bypassed by the economic transformation going on world wide, then large numbers of Africans and perhaps all of Africa will remain poor and food insecure. The fundamental purpose behind the FAO initiative to strengthening farmagribusiness linkages is to help transform the agricultural sector in order to accelerate productivity growth, increase income and employment generation, improve food security, and increase competitiveness in regional and international trade. In 2001 and 2002 five country case studies on farm-agribusiness linkages were undertaken in Ghana, Nigeria, Kenya, Uganda and South Africa. The main purpose of the studies was to get an insight into current farm-agribusiness linking arrangements. This included identifying and analysing successful linkages highlighting different methods and practices as well as exploring key factors that have led to successful partnerships. The country studies also contained a brief agribusiness sector overview. The work in Africa began with preparation of five case studies which are presented as summary results as well as individually. FAO work on farm-agribusiness linkages emerged from a broader cross-regional study on farm-agribusiness linkages launched in 2000. The first stage was a series of country studies and a regional consultation in Asia. During 2001 and 2002, case studies and a regional workshop on agribusiness linkages were carried out in Latin America. This was followed by a workshop on strategies for improving negotiation and compliance capabilities, held in November 2002 in Peru. An expert consultation on strengthening farm-agribusiness linkages in Africa was held in March 2003 in Nairobi, Kenya.

2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS), 2021

This paper presents 22FDSOI device RF performance figure of merit dependencies on the design para... more This paper presents 22FDSOI device RF performance figure of merit dependencies on the design parameters, such as gate length, width per finger, number of fingers, centerline poly pitch, as well as the vertical gate repetition. With a proper design parameters combination, the device can achieve as high as 413 GHz of fMAXf_{MAX}fMAX. As a circuit demonstration, a 2-stage 2-stack power amplifier achieves an output power of 20.2 dBm and 32 % peak PAE at 28 GHz.

2019 IEEE 2nd 5G World Forum (5GWF), 2019

This paper investigates the applicability of a thick-oxide transistor from the 22FDX® for 5G NR s... more This paper investigates the applicability of a thick-oxide transistor from the 22FDX® for 5G NR sub-6 GHz front-end modules. Characterization and evaluation of the GlobalFoundries's FDSOI n-MOSFET regarding RF front-end figure-of-merits, such as output power, efficiency and linearity are discussed. Load-pull measurements are performed to extract the optimal performance. The test transistor delivers saturation power of +5.0 dBm and more than 65% of PAE while maintaining flat transducer gain of 10.2 ± 0.2 dB across the targeted frequency range for a 1.5 V single-ended class AB operation. Besides, the low PAE roll-off in term of reducing supply voltage and the particular 60% PAE at 10 dB output back-off indicate that the DUTs are well suitable for envelope tracking applications. Additional reliability tests at strong compression levels are conducted from which low performance degradation over time is observed even at 9 dB output compression.

2020 German Microwave Conference (GeMiC), 2020

The following study discusses the impact of hot-carrier degradation on high frequency performance... more The following study discusses the impact of hot-carrier degradation on high frequency performance of the 22nm FDSOI n-channel transistors. A quasi-static small-signal equivalent circuit MOSFET model is used to describe the device behavior. RF characteristics are extracted after stressing device with continuous DC. DC characteristics are also investigated thoroughly before and after stress. It is observed that, the device suffers from both interface damage and oxide defect. Accordingly, this study addresses how severe hot-carrier degradation affects the intrinsic parameters as well as the device performance.

IEEE Transactions on Electron Devices, 2021

This article presents a systematic empirical modeling approach in fully depleted silicon-on-insul... more This article presents a systematic empirical modeling approach in fully depleted silicon-on-insulator (FDSOI) CMOS for large-signal simulation in power amplifier applications. The model is constructed from multibias S-parameter measurements up to 67 GHz. The frequency dispersions in transconductance and output conductance are addressed by two independent radio frequency (RF) current sources. Angelov’s current formula is modified to adapt to the FDSOI transistors. Load-pull measurements are performed for the large-signal verification in a non-50- Omega\Omega Omega environment. The model accurately predicts the nonlinear characteristics of the device under test and the harmonic components. The time-domain waveforms also show excellent agreement to the simulation.

2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019

This paper presents a tunable 60 GHz band-pass filter, based on a coplanar waveguide (CPW) transm... more This paper presents a tunable 60 GHz band-pass filter, based on a coplanar waveguide (CPW) transmission line, periodically loaded with ferroelectric Hafnium Zirconium Oxide (HZO) variable metal-ferroelectric-metal (MIM) capacitors (varactors), developed for back-end-of-line (BEoL) integration. Derived from the nonlinear capacitance of hafnium zirconium oxide and implementing the method-of-moments simulation, it was shown, that with changing the bias voltage between 0.95 and -3 V, the filter’s center frequency can be tuned between 60.5 and 69,7 GHz, respectively. Hereby, a minimum insertion loss of -3.3 dB is realized. The chip area of the filter is only 0.062 mm2, making it the smallest among tunable V-band filters.

2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019

This paper presents a 60 GHz phase shifter, based on a coplanar waveguide (CPW) transmission line... more This paper presents a 60 GHz phase shifter, based on a coplanar waveguide (CPW) transmission line, loaded with ferroelectric hafnium zirconium oxide (HZO) variable metal-insulator-metal (MIM) varactors, developed for the back-end-of-line (BEoL) on-chip integration. Using the measured data of capacitance-voltage (C-V) characteristics of HZO and implementing the method-of-moments simulation, it was shown, that by changing the bias voltage between 0.95 and -3 V, the device shows a phase shift of 111° and a minimum insertion loss of -5.84 dB at 60 GHz. The chip area of the device is 0.206 mm2, making it the smallest among non-CMOS phase shifters.

Environmental Chemistry Letters, 2018

Membrane technology has become a common separation technology over the past decennia. Membranes a... more Membrane technology has become a common separation technology over the past decennia. Membranes are used more and more for the production of drinkable water from groundwater, surface water and wastewater. Membranes are now competitive versus conventional techniques. Desalination is predominantly used to eradicate the problem of water scarcity. The sustainability of all desalination processes depends mainly on the reduction of energy costs (production cost) and the increase in water recovery. Forward osmosis and membrane distillation are emerging technologies for sustainable desalination. Here we review membrane processes of forward osmosis and membrane distillation and the advancements in membrane material and modules. We also discuss the capability of membrane distillation in treating highly concentrated aqueous solutions derived from other desalination processes. Furthermore, the advancements in fabrication of high-performance membrane is reviewed and the performance of different membranes and optimization of membrane distillation process are summarized.

Separation and Purification Technology, 2017

Osmotic membrane bioreactors (OsMBRs) are a recent breakthrough technology designed to treat wast... more Osmotic membrane bioreactors (OsMBRs) are a recent breakthrough technology designed to treat wastewater. Nevertheless, their application in high-salinity wastewater treatment is not widespread because of the effects of saline conditions on microbial community activity. In response, this study developed an integrated sponge biocarrier-OsMBR system using highly salttolerant microorganisms for treating saline wastewater. Results showed that the sponge biocarrier-OsMBR obtained an average water flux of 2 L/m 2 h during a 92-day operation when 1 M MgCl 2 was used as the draw solution. The efficiency in removing dissolved organic compounds from the proposed system was more than 99%, and nutrient rejection was close to 100%, indicating excellent performance in simultaneous nitrification and denitrification processes in the biofilm layer on the carriers. Moreover, salt-tolerant microorganisms in the sponge biocarrier-OsMBR system worked efficiently in salt concentrations of 2.4%. A polytetrafluoroethylene MD membrane (pores = 0.45 μm) served to regenerate the diluted draw solution in the closed-loop system and produce high-quality water. The moving sponge biocarrier-OsMBR/MD hybrid system demonstrated its potential to treat salinity wastewater treatment, with 100% nutrient removal and 99.9% conductivity rejection.

Tissue mechanics and cellular interactions influence every single cell in our bodies to drive mor... more Tissue mechanics and cellular interactions influence every single cell in our bodies to drive morphogenesis. However, little is known about mechanisms by which cells sense physical forces and transduce them from the cytoskeleton to the nucleus to control gene expression and stem cell fate. We have identified a novel nuclear-mechanosensor complex, consisting of the nuclear membrane protein emerin (Emd), actin and non-muscle myosin IIA (NMIIA), that regulates transcription, chromatin remodeling and lineage commitment. Force-induced enrichment of Emd at the outer nuclear membrane leads to a compensation between H3K9me2,3 and H3K27me3 on constitutive heterochromatin. This strain-induced epigenetic switch is accompanied by the global rearrangement of chromatin. In parallel, forces promote local F-actin polymerization at the outer nuclear membrane, which limits the availability of nuclear G-actin. Subsequently, the reduction of nuclear G-actin results in attenuated global transcription an...