Mohamed Latrach - Profile on Academia.edu (original) (raw)
Papers by Mohamed Latrach
The broadband bandwidth of power amplifiers is one of the most important features that restrict i... more The broadband bandwidth of power amplifiers is one of the most important features that restrict its wide usage. This work presents a new structure of a broadband power amplifier suitable for ISM band. The proposed amplifier, which is realized with two identical single-stage amplifiers and two power dividers on low loss Epoxy (FR4) substrate with a substrate thickness of 1.6mm and a relative permittivity equal to 4.4. The proposed PA demonstrates a power gain of 16 dB at 2.45GHz. The input and output matching impedances are better than -15dB throughout the band. the power amplifier delivers a maximum output power equal to 16dBm with a flat gain varied between 15-16dB.
TELKOMNIKA Telecommunication Computing Electronics and Control, Oct 1, 2018
This paper presents the design of Continuous Wave Terahetz photonic transmitters based on photode... more This paper presents the design of Continuous Wave Terahetz photonic transmitters based on photodector which convert the light signal to electrical signal, THz antenna, low-pass filter (LPF) and DC Probe. In the design of the CW THz photonic transmitter System, we begin with the matching input impedance and validation of THz antenna using an EM solver Momentum integrated in ADS "Advanced Design System". Then we pass to the optimization of a low-pass filter which had the role of inductance, blocking the RF signal providing from the antenna to reach the DC probe. Finally, we associate the previous structures with a DC probe and simulate the whole circuit until validating the CW THz photonic transmitter circuit. The three structures are based on multi-layers GaAs substrate, which is the most widely used for THz circuit design. The dimensions of the whole circuit are 819.071 Γ 164.10 ππ 2 .
Transactions on Machine Learning and Artificial Intelligence, Aug 31, 2017
In this paper, we introduce a new periodic structure for CPW of a low pass filter based on the DG... more In this paper, we introduce a new periodic structure for CPW of a low pass filter based on the DGS technique with triangle slot cell forme. The proposed structure is a minuature low pass filter that exhibits low insertion loss in the passband, simple fabrication, and easy to integrate with microwave planar circuits. A Lowpass filter (LPF) has been designed with flat response at a selected frequency by cascading three DGS cells.
International Journal of Intelligent Engineering and Systems, Feb 28, 2019
In this paper, a highly miniaturized microstrip antenna array is proposed for the small wireless ... more In this paper, a highly miniaturized microstrip antenna array is proposed for the small wireless device. The antenna array is designed to cover the Industrial Scientific Medical band (ISM) at 2.45GHz. The antenna array is miniaturized using a new geometry of defected ground structure (DGS) etched in the ground plane of each radiating element of the antenna array. The array size is 140.74mm by 57.15mm, which means 78.63% miniaturization ratio is achieved at 2.45GHz as compared with a conventional microstrip antenna array with an ordinary ground plane of 367.26x102.46mm 2 resonating at the same frequency (2.45GHz). The structure is implemented on an FR-4 substrate of a relative permittivity equal to 4.4, 1.6mm of thickness and 0.025 of loss tangent. This compact antenna array is designed and optimized by using the electromagnetic solver based on finite integration technique, and the results agree with those obtained by the high-frequency electromagnetic field simulation solution (HFSS). The simulated 10-dB return-loss bandwidth of the printed array is about 157.5MHz, whereas the value of gain is about 7.026dB, which is relatively satisfied. Finally, the final circuit of miniaturized antenna array is fabricated and measured.
TELKOMNIKA Telecommunication Computing Electronics and Control, Oct 1, 2018
A Microstrip Antenna (MSA) has been computed and analysed in this study by using CST of Microwave... more A Microstrip Antenna (MSA) has been computed and analysed in this study by using CST of Microwave studio as Electromagnetic solver by generating the coefficient of reflection, the Gain, the density of current and the radiation pattern in the frequency range 3.1-10.6 GHz which commercialised by the Federal communication commission (FCC) as an Ultra-wide band (UWB) frequency range. The substrate used to achieve the proposed structure is the FR4-Epoxy with a thickness of 1.6 mm, a constant dielectric of 4.4 and a loss tangent of 0.025. The radiating patch is a circular shape etched with different sizes to create the fractal geometry. The transmission line has been designed by including a tapered section in the part connected to the radiator. The design of the antenna has been verified by using ADS and CST solvers. The fabrication of the antenna has been performed in order to measure the coefficient of reflection and the radiation pattern.
A new flexible passive UHF RFID tag antenna using meander line
2ND INTERNATIONAL CONFERENCE ON MATERIALS FOR ENERGY AND ENVIRONMENT 2020
A New Design of UHF RFID Tag Antenna Based on Negative Index Metamaterial
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems
In this paper, A new design of dipole tag antenna based left-handed metamaterial is proposed for ... more In this paper, A new design of dipole tag antenna based left-handed metamaterial is proposed for ultra-high-frequency (UHF) RF identification (RFID) applications. The proposed tag antenna is composed of two modified split ring resonators. To ensure the conjugate matching between the tag antenna and the electronic chip, a double T-matching structure combined with meander line technique are employed. The antenna is designed by using ADS based on momentum technique on a paper substrate. The tag antenna has an overall dimension of 76.6 mm x 25 mm. The simulated results show that the antenna provides a reflection coefficient about -39dB, gain about 1.34 dB and bandwidth about 32 MHz which cover the American UHF RFID band.
A New Design of a Microstrip Microwave Power Amplifier for PCS BAND
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems
In this letter we present a new design of a microstrip microwave PA (power amplifier) for PCS (Pe... more In this letter we present a new design of a microstrip microwave PA (power amplifier) for PCS (Personal communication Services/System) applications at 1.85GHz and it is based on AT-41410 NPN transistor that has a high transition frequency of 10GHz. The design process apply in this work is obtained by ADS (Advanced Design System) software. The simulation results show good performances in terms of small and large-signal. The proposed amplifier design achieves a high gain in excess of 12.8dB. For the input reflection coefficient (S11) is below than -33.7dB. Regarding the output reflection coefficient (S22) is below than -29dB. Thus, the unilateral transmission (S12) is less than -19.5dB and for the output power is rise up of 18dBm at 1dB compression point.
A novel design of passive UHF RFID tag antenna mounted on paper
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)
In this paper, a novel design of metamaterial passive tag antenna for radio frequency identificat... more In this paper, a novel design of metamaterial passive tag antenna for radio frequency identification operating in the UHF band is proposed. The design of the proposed tag antenna included a meandering technique to match the antenna with the tag chip and a complementary split ring resonator to reduce the antenna size. An advanced Photopaper substrate having a permittivity of 3.3, loss tangent of 0.04 and thickness of 0.25mm is used to design this tag antenna. The dimensions of the proposed tag antenna are optimized by using ADS. The total size of this circuit is 84.6 Γ 28mm2. The performance of the proposed tag antenna is evaluated and analyzed based on gain, return loss, matching input impedance and read range. The simulated reflection coefficient is about β35dB at 915MHz, the impedance bandwidth is about 32.8MHz, gain is 1.8dB, and the read range is about 6.2 m.
TELKOMNIKA (Telecommunication Computing Electronics and Control)
The requirement for applications operating at a variety of frequencies in a unified wireless devi... more The requirement for applications operating at a variety of frequencies in a unified wireless device has greatly enhanced in recent years. For this purpose, multi-functional wireless components are essential. This paper presents a new design of a wideband circularly-polarized microstrip antenna array with defected ground structure (DGS). A previous design was introduced which cover the C-band at 5.8 GHz and operates in the industrial scientific medical (ISM) band for wireless communication applications. The proposed antenna has excellent performances which include good input impedance matching with a fed of the circular polarization at 5.8 GHz. The proposed design is validated and optimized by adding a new design of defected ground structure. This aperture geometry enables the antenna to operate in a wideband. The obtained results show that the modified antenna has a good performance in terms of return loss, bandwidth, gain and radiation pattern and demonstrate that the proposed antenna offers a good solution for multi-standard wireless communication applications.
Design of five-shaped fingers based RFID Chipless tag
2019 Antennas Design and Measurement International Conference (ADMInC)
We report the design of a new chipless tag characterized by an original shape and a reduced size ... more We report the design of a new chipless tag characterized by an original shape and a reduced size ensuring a 4 data bit encoding capapcity in the Ultra Wideband. The tag simulation and measurement validate our study and gives an improved reponse by adopting the frequency domain approach and the binary encoding technique.
E3S Web of Conferences
This paper presents a new miniature Microstrip Bandpass Filter optimized and validated for DCS (D... more This paper presents a new miniature Microstrip Bandpass Filter optimized and validated for DCS (Digital Cellular System) Band. The proposed filter is based on a Microstrip resonator. Each port has a step impedance feed line that can be used to adapt the filter's input impedance to the characteristic impedance Z0. The suggested filter is installed on a low-cost FR-4 substrate with a dielectric constant of 4.4, a thickness of 1.6 mm, a loss tangent tan (Ξ΄) = 0.025, and a metal thickness of t = 0.035 mm. It has a bandwidth of 1.68GHz to 2.05GHz. Two electromagnetic solvers are used to optimize and validate this filter. The whole dimensions of the final circuit are 33.6x40 mm2. This filter is suitable for mobile communication.
A Planar High Pass Filter with Quasilumped Elements for ISM, Wimax and Wlan Applications
2020 IEEE 2nd International Conference on Electronics, Control, Optimization and Computer Science (ICECOCS)
This paper presents a quasilumped Microstrip structure High Pass Filter having a cutoff frequency... more This paper presents a quasilumped Microstrip structure High Pass Filter having a cutoff frequency 2.5 GHz. The quasilumped elements are used with the objective of obtaining the behavior of a high-pass filter with high bandwidth, reducing the size of the filter and improving the electrical performances. The proposed filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric permittivity constant of 4.4 and loss tangent of 0.025. The proposed filter is optimized and validated by using three electromagnetic solvers (ADS, HFSS and CST-MWS).The whole area of the proposed circuit is 19 x 16 mm2.
RFID Chipless Tag Based on Substrate Integrated Triangular Cavity
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems
This paper presents an optimized Radio Frequency Identification chipless tag based on substrate i... more This paper presents an optimized Radio Frequency Identification chipless tag based on substrate integrated waveguide technology with a reduced size, and a high quality factor. The tag operates in a sub-band of the Ultra Wide Band from 7 to 7.5 GHz. It consists of using the frequency encoding approach based on frequency shifting technique; allows obtaining an important number of encoding states by changing the resonant peak position in the operation band. The frequency shift is achieved when changing the substrate parameters by drilling via holes or metalized via. The tag is designed; simulated and optimized ensuring improved results compared to existed designs based on the same used techniques, which proves that the proposed configuration is very suitable for short range applications of identification.
A Novel Wideband CPW-Fed Square Aperture Monopole Antenna with Inverted-L Grounded Strips for Wireless and Satellite Applications
2020 IEEE 2nd International Conference on Electronics, Control, Optimization and Computer Science (ICECOCS), 2020
In this paper, the design of a monopole slot antenna with a coplanar waveguide (CPW) for Wireless... more In this paper, the design of a monopole slot antenna with a coplanar waveguide (CPW) for Wireless power transmission and GPS Applications is presented. The proposed antenna embedded a pair of inverted-L grounded strips around two opposite corners of the ground and L-shaped slit features in the upper face of ground plane and a monopole patch with two opposite corners slots protruded into the slot from the signal strip of the CPW. The wideband can be obtained by setting the corresponding parameters of the L-shaped slit whereas the matching input impedance bandwidth can be greatly improved through the tuning stub. The designed antenna has a small size of 60Γ60Γ0.74mm3. The features of the antennas, for instance, return losses and radiation patterns are validated. Finally, the full system is analyzed and optimized, and the properties of the antennas, for instance, return losses and radiation patterns are validated into simulation by using CST Microwave Studio electromagnetic solver and HFSS solver.
Multiband fractal CPW antenna for GPS, WiMAX and IMT applications
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
This paper presents a new design of a fractal multiband antenna structure fed by coplanar wavegui... more This paper presents a new design of a fractal multiband antenna structure fed by coplanar waveguide (CPW) transmission line. The proposed antenna is optimized by using CST-MW studio. The final validated circuit is designed to operate in the Global Positioning System (GPS 1.57), Worldwide Interoperability for Microwave Access (WiMAX 2.5 β 2.69 / 3.30 β 3.80), and Advanced System of forth generation mobile communication (IMT 3.40 β 4.20 GHZ). Manifestly, it has been found that the radiation patterns of the presented antenna are still similarly to the bidirectional radiation pattern. The properties of the antennas, for instance, return losses and radiation patterns are validated into simulation by using two electromagnetic simulators HFSS and CST-MW Studio.
A novel design of a compact miniature microstrip low pass filter based on SRR
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
In this work, a novel compact microstrip low-pass filter is designed based on square split ring r... more In this work, a novel compact microstrip low-pass filter is designed based on square split ring resonator. The SRR is used to reduce the size of the filter and to improve the good electrical performances. The dumbbell-shaped defected ground structure is introduced into the ground plane in order to achieve a desired cutoff frequency of 1.2 GHz with a ripple level less than 0.2 dB in the pass-band and an attenuation better than 20 dB in the rejected band. The proposed filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric constant of 4.4 and loss tangent of 0.025. The whole area of the proposed circuit is 24Γ26mm2. The computed results obtained by CST microwave and Ansoft HFSS are in good agreement. The size of LPF is miniaturized by 60% compared to the conventional filter.
A Multiband Planar Fractal Antenna Array for DCS and ISM Bands
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems, 2017
In this paper, a new multiband planar fractal antenna array based on an elliptic geometry is pres... more In this paper, a new multiband planar fractal antenna array based on an elliptic geometry is presented. the antenna array is composed by four antenna elements fed with parallel method. The simulated -10 dB return loss bandwidths are (1.7 - 1.92) GHz, (2.4 - 2.51) GHz and (5.7 - 6) GHz that cover DCS (Digital Communication System) 1.8 GHz, ISM (Industrial, Scientific and Medical) 2.4 GHz and 5.8 GHz bands. The antenna array gain is around 8 dBi for the first band, 10 dBi for the second and 12 dBi for the last one. The radiation pattern is approximately the same in the three validated bands. The final structure is designed over an FR4 substrate with 200 x 50 mm2 as dimensions.
A new design of U shaped reconfigurable antenna based on PIN diodes
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
In this paper, we propose a novel reconfigurable patch antenna for wireless communication systems... more In this paper, we propose a novel reconfigurable patch antenna for wireless communication systems. The proposed reconfigurable antenna is based on PIN diodes associated to three U shaped resonators. The operating frequency of the proposed antenna can be tuned by changing the state of the PIN diode. In this work, we modelized the PIN diode using two different methods. This circuit is mounted on an FR-4 substrate with a thickness of 1.6mm, dielectric constant of 4.4 and tangent loss of 0.025. The simulation results are performed with CST-MW studio and verified by ADS.
Design of 45 degree microstrip phase shifter for beam forming network application using parallel coupled lines
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
A 45 degree differential microstrip phase shifter operating in the frequency band ranging from 1.... more A 45 degree differential microstrip phase shifter operating in the frequency band ranging from 1.4 GHz to 2.7 GHz is presented in this paper. It is designed by adopting the model of double parallel Schiffman phase shifter and simulated on an FR4 substrate by using two electromagnetic simulation software, ADS from Agilent technologies and CST Microwave Studio. The proposed phase shift circuit offers good results in terms of return loss, insertion loss and phase shift. Good agreement between simulated results using ADS and CST Microwave Studio is obtained.
The broadband bandwidth of power amplifiers is one of the most important features that restrict i... more The broadband bandwidth of power amplifiers is one of the most important features that restrict its wide usage. This work presents a new structure of a broadband power amplifier suitable for ISM band. The proposed amplifier, which is realized with two identical single-stage amplifiers and two power dividers on low loss Epoxy (FR4) substrate with a substrate thickness of 1.6mm and a relative permittivity equal to 4.4. The proposed PA demonstrates a power gain of 16 dB at 2.45GHz. The input and output matching impedances are better than -15dB throughout the band. the power amplifier delivers a maximum output power equal to 16dBm with a flat gain varied between 15-16dB.
TELKOMNIKA Telecommunication Computing Electronics and Control, Oct 1, 2018
This paper presents the design of Continuous Wave Terahetz photonic transmitters based on photode... more This paper presents the design of Continuous Wave Terahetz photonic transmitters based on photodector which convert the light signal to electrical signal, THz antenna, low-pass filter (LPF) and DC Probe. In the design of the CW THz photonic transmitter System, we begin with the matching input impedance and validation of THz antenna using an EM solver Momentum integrated in ADS "Advanced Design System". Then we pass to the optimization of a low-pass filter which had the role of inductance, blocking the RF signal providing from the antenna to reach the DC probe. Finally, we associate the previous structures with a DC probe and simulate the whole circuit until validating the CW THz photonic transmitter circuit. The three structures are based on multi-layers GaAs substrate, which is the most widely used for THz circuit design. The dimensions of the whole circuit are 819.071 Γ 164.10 ππ 2 .
Transactions on Machine Learning and Artificial Intelligence, Aug 31, 2017
In this paper, we introduce a new periodic structure for CPW of a low pass filter based on the DG... more In this paper, we introduce a new periodic structure for CPW of a low pass filter based on the DGS technique with triangle slot cell forme. The proposed structure is a minuature low pass filter that exhibits low insertion loss in the passband, simple fabrication, and easy to integrate with microwave planar circuits. A Lowpass filter (LPF) has been designed with flat response at a selected frequency by cascading three DGS cells.
International Journal of Intelligent Engineering and Systems, Feb 28, 2019
In this paper, a highly miniaturized microstrip antenna array is proposed for the small wireless ... more In this paper, a highly miniaturized microstrip antenna array is proposed for the small wireless device. The antenna array is designed to cover the Industrial Scientific Medical band (ISM) at 2.45GHz. The antenna array is miniaturized using a new geometry of defected ground structure (DGS) etched in the ground plane of each radiating element of the antenna array. The array size is 140.74mm by 57.15mm, which means 78.63% miniaturization ratio is achieved at 2.45GHz as compared with a conventional microstrip antenna array with an ordinary ground plane of 367.26x102.46mm 2 resonating at the same frequency (2.45GHz). The structure is implemented on an FR-4 substrate of a relative permittivity equal to 4.4, 1.6mm of thickness and 0.025 of loss tangent. This compact antenna array is designed and optimized by using the electromagnetic solver based on finite integration technique, and the results agree with those obtained by the high-frequency electromagnetic field simulation solution (HFSS). The simulated 10-dB return-loss bandwidth of the printed array is about 157.5MHz, whereas the value of gain is about 7.026dB, which is relatively satisfied. Finally, the final circuit of miniaturized antenna array is fabricated and measured.
TELKOMNIKA Telecommunication Computing Electronics and Control, Oct 1, 2018
A Microstrip Antenna (MSA) has been computed and analysed in this study by using CST of Microwave... more A Microstrip Antenna (MSA) has been computed and analysed in this study by using CST of Microwave studio as Electromagnetic solver by generating the coefficient of reflection, the Gain, the density of current and the radiation pattern in the frequency range 3.1-10.6 GHz which commercialised by the Federal communication commission (FCC) as an Ultra-wide band (UWB) frequency range. The substrate used to achieve the proposed structure is the FR4-Epoxy with a thickness of 1.6 mm, a constant dielectric of 4.4 and a loss tangent of 0.025. The radiating patch is a circular shape etched with different sizes to create the fractal geometry. The transmission line has been designed by including a tapered section in the part connected to the radiator. The design of the antenna has been verified by using ADS and CST solvers. The fabrication of the antenna has been performed in order to measure the coefficient of reflection and the radiation pattern.
A new flexible passive UHF RFID tag antenna using meander line
2ND INTERNATIONAL CONFERENCE ON MATERIALS FOR ENERGY AND ENVIRONMENT 2020
A New Design of UHF RFID Tag Antenna Based on Negative Index Metamaterial
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems
In this paper, A new design of dipole tag antenna based left-handed metamaterial is proposed for ... more In this paper, A new design of dipole tag antenna based left-handed metamaterial is proposed for ultra-high-frequency (UHF) RF identification (RFID) applications. The proposed tag antenna is composed of two modified split ring resonators. To ensure the conjugate matching between the tag antenna and the electronic chip, a double T-matching structure combined with meander line technique are employed. The antenna is designed by using ADS based on momentum technique on a paper substrate. The tag antenna has an overall dimension of 76.6 mm x 25 mm. The simulated results show that the antenna provides a reflection coefficient about -39dB, gain about 1.34 dB and bandwidth about 32 MHz which cover the American UHF RFID band.
A New Design of a Microstrip Microwave Power Amplifier for PCS BAND
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems
In this letter we present a new design of a microstrip microwave PA (power amplifier) for PCS (Pe... more In this letter we present a new design of a microstrip microwave PA (power amplifier) for PCS (Personal communication Services/System) applications at 1.85GHz and it is based on AT-41410 NPN transistor that has a high transition frequency of 10GHz. The design process apply in this work is obtained by ADS (Advanced Design System) software. The simulation results show good performances in terms of small and large-signal. The proposed amplifier design achieves a high gain in excess of 12.8dB. For the input reflection coefficient (S11) is below than -33.7dB. Regarding the output reflection coefficient (S22) is below than -29dB. Thus, the unilateral transmission (S12) is less than -19.5dB and for the output power is rise up of 18dBm at 1dB compression point.
A novel design of passive UHF RFID tag antenna mounted on paper
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)
In this paper, a novel design of metamaterial passive tag antenna for radio frequency identificat... more In this paper, a novel design of metamaterial passive tag antenna for radio frequency identification operating in the UHF band is proposed. The design of the proposed tag antenna included a meandering technique to match the antenna with the tag chip and a complementary split ring resonator to reduce the antenna size. An advanced Photopaper substrate having a permittivity of 3.3, loss tangent of 0.04 and thickness of 0.25mm is used to design this tag antenna. The dimensions of the proposed tag antenna are optimized by using ADS. The total size of this circuit is 84.6 Γ 28mm2. The performance of the proposed tag antenna is evaluated and analyzed based on gain, return loss, matching input impedance and read range. The simulated reflection coefficient is about β35dB at 915MHz, the impedance bandwidth is about 32.8MHz, gain is 1.8dB, and the read range is about 6.2 m.
TELKOMNIKA (Telecommunication Computing Electronics and Control)
The requirement for applications operating at a variety of frequencies in a unified wireless devi... more The requirement for applications operating at a variety of frequencies in a unified wireless device has greatly enhanced in recent years. For this purpose, multi-functional wireless components are essential. This paper presents a new design of a wideband circularly-polarized microstrip antenna array with defected ground structure (DGS). A previous design was introduced which cover the C-band at 5.8 GHz and operates in the industrial scientific medical (ISM) band for wireless communication applications. The proposed antenna has excellent performances which include good input impedance matching with a fed of the circular polarization at 5.8 GHz. The proposed design is validated and optimized by adding a new design of defected ground structure. This aperture geometry enables the antenna to operate in a wideband. The obtained results show that the modified antenna has a good performance in terms of return loss, bandwidth, gain and radiation pattern and demonstrate that the proposed antenna offers a good solution for multi-standard wireless communication applications.
Design of five-shaped fingers based RFID Chipless tag
2019 Antennas Design and Measurement International Conference (ADMInC)
We report the design of a new chipless tag characterized by an original shape and a reduced size ... more We report the design of a new chipless tag characterized by an original shape and a reduced size ensuring a 4 data bit encoding capapcity in the Ultra Wideband. The tag simulation and measurement validate our study and gives an improved reponse by adopting the frequency domain approach and the binary encoding technique.
E3S Web of Conferences
This paper presents a new miniature Microstrip Bandpass Filter optimized and validated for DCS (D... more This paper presents a new miniature Microstrip Bandpass Filter optimized and validated for DCS (Digital Cellular System) Band. The proposed filter is based on a Microstrip resonator. Each port has a step impedance feed line that can be used to adapt the filter's input impedance to the characteristic impedance Z0. The suggested filter is installed on a low-cost FR-4 substrate with a dielectric constant of 4.4, a thickness of 1.6 mm, a loss tangent tan (Ξ΄) = 0.025, and a metal thickness of t = 0.035 mm. It has a bandwidth of 1.68GHz to 2.05GHz. Two electromagnetic solvers are used to optimize and validate this filter. The whole dimensions of the final circuit are 33.6x40 mm2. This filter is suitable for mobile communication.
A Planar High Pass Filter with Quasilumped Elements for ISM, Wimax and Wlan Applications
2020 IEEE 2nd International Conference on Electronics, Control, Optimization and Computer Science (ICECOCS)
This paper presents a quasilumped Microstrip structure High Pass Filter having a cutoff frequency... more This paper presents a quasilumped Microstrip structure High Pass Filter having a cutoff frequency 2.5 GHz. The quasilumped elements are used with the objective of obtaining the behavior of a high-pass filter with high bandwidth, reducing the size of the filter and improving the electrical performances. The proposed filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric permittivity constant of 4.4 and loss tangent of 0.025. The proposed filter is optimized and validated by using three electromagnetic solvers (ADS, HFSS and CST-MWS).The whole area of the proposed circuit is 19 x 16 mm2.
RFID Chipless Tag Based on Substrate Integrated Triangular Cavity
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems
This paper presents an optimized Radio Frequency Identification chipless tag based on substrate i... more This paper presents an optimized Radio Frequency Identification chipless tag based on substrate integrated waveguide technology with a reduced size, and a high quality factor. The tag operates in a sub-band of the Ultra Wide Band from 7 to 7.5 GHz. It consists of using the frequency encoding approach based on frequency shifting technique; allows obtaining an important number of encoding states by changing the resonant peak position in the operation band. The frequency shift is achieved when changing the substrate parameters by drilling via holes or metalized via. The tag is designed; simulated and optimized ensuring improved results compared to existed designs based on the same used techniques, which proves that the proposed configuration is very suitable for short range applications of identification.
A Novel Wideband CPW-Fed Square Aperture Monopole Antenna with Inverted-L Grounded Strips for Wireless and Satellite Applications
2020 IEEE 2nd International Conference on Electronics, Control, Optimization and Computer Science (ICECOCS), 2020
In this paper, the design of a monopole slot antenna with a coplanar waveguide (CPW) for Wireless... more In this paper, the design of a monopole slot antenna with a coplanar waveguide (CPW) for Wireless power transmission and GPS Applications is presented. The proposed antenna embedded a pair of inverted-L grounded strips around two opposite corners of the ground and L-shaped slit features in the upper face of ground plane and a monopole patch with two opposite corners slots protruded into the slot from the signal strip of the CPW. The wideband can be obtained by setting the corresponding parameters of the L-shaped slit whereas the matching input impedance bandwidth can be greatly improved through the tuning stub. The designed antenna has a small size of 60Γ60Γ0.74mm3. The features of the antennas, for instance, return losses and radiation patterns are validated. Finally, the full system is analyzed and optimized, and the properties of the antennas, for instance, return losses and radiation patterns are validated into simulation by using CST Microwave Studio electromagnetic solver and HFSS solver.
Multiband fractal CPW antenna for GPS, WiMAX and IMT applications
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
This paper presents a new design of a fractal multiband antenna structure fed by coplanar wavegui... more This paper presents a new design of a fractal multiband antenna structure fed by coplanar waveguide (CPW) transmission line. The proposed antenna is optimized by using CST-MW studio. The final validated circuit is designed to operate in the Global Positioning System (GPS 1.57), Worldwide Interoperability for Microwave Access (WiMAX 2.5 β 2.69 / 3.30 β 3.80), and Advanced System of forth generation mobile communication (IMT 3.40 β 4.20 GHZ). Manifestly, it has been found that the radiation patterns of the presented antenna are still similarly to the bidirectional radiation pattern. The properties of the antennas, for instance, return losses and radiation patterns are validated into simulation by using two electromagnetic simulators HFSS and CST-MW Studio.
A novel design of a compact miniature microstrip low pass filter based on SRR
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
In this work, a novel compact microstrip low-pass filter is designed based on square split ring r... more In this work, a novel compact microstrip low-pass filter is designed based on square split ring resonator. The SRR is used to reduce the size of the filter and to improve the good electrical performances. The dumbbell-shaped defected ground structure is introduced into the ground plane in order to achieve a desired cutoff frequency of 1.2 GHz with a ripple level less than 0.2 dB in the pass-band and an attenuation better than 20 dB in the rejected band. The proposed filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric constant of 4.4 and loss tangent of 0.025. The whole area of the proposed circuit is 24Γ26mm2. The computed results obtained by CST microwave and Ansoft HFSS are in good agreement. The size of LPF is miniaturized by 60% compared to the conventional filter.
A Multiband Planar Fractal Antenna Array for DCS and ISM Bands
Proceedings of the 2nd International Conference on Computing and Wireless Communication Systems, 2017
In this paper, a new multiband planar fractal antenna array based on an elliptic geometry is pres... more In this paper, a new multiband planar fractal antenna array based on an elliptic geometry is presented. the antenna array is composed by four antenna elements fed with parallel method. The simulated -10 dB return loss bandwidths are (1.7 - 1.92) GHz, (2.4 - 2.51) GHz and (5.7 - 6) GHz that cover DCS (Digital Communication System) 1.8 GHz, ISM (Industrial, Scientific and Medical) 2.4 GHz and 5.8 GHz bands. The antenna array gain is around 8 dBi for the first band, 10 dBi for the second and 12 dBi for the last one. The radiation pattern is approximately the same in the three validated bands. The final structure is designed over an FR4 substrate with 200 x 50 mm2 as dimensions.
A new design of U shaped reconfigurable antenna based on PIN diodes
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
In this paper, we propose a novel reconfigurable patch antenna for wireless communication systems... more In this paper, we propose a novel reconfigurable patch antenna for wireless communication systems. The proposed reconfigurable antenna is based on PIN diodes associated to three U shaped resonators. The operating frequency of the proposed antenna can be tuned by changing the state of the PIN diode. In this work, we modelized the PIN diode using two different methods. This circuit is mounted on an FR-4 substrate with a thickness of 1.6mm, dielectric constant of 4.4 and tangent loss of 0.025. The simulation results are performed with CST-MW studio and verified by ADS.
Design of 45 degree microstrip phase shifter for beam forming network application using parallel coupled lines
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2017
A 45 degree differential microstrip phase shifter operating in the frequency band ranging from 1.... more A 45 degree differential microstrip phase shifter operating in the frequency band ranging from 1.4 GHz to 2.7 GHz is presented in this paper. It is designed by adopting the model of double parallel Schiffman phase shifter and simulated on an FR4 substrate by using two electromagnetic simulation software, ADS from Agilent technologies and CST Microwave Studio. The proposed phase shift circuit offers good results in terms of return loss, insertion loss and phase shift. Good agreement between simulated results using ADS and CST Microwave Studio is obtained.