A high-performance 1–7 GHz UWB LNA using standard 0.18 μM CMOS technology (original) (raw)
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Procedia Technology, 2016
Developing and employing methods to reduce the mutual coupling between elements of an antenna array has become a hot topic in the design of antenna arrays. The utilization of electromagnetic band-gap (EBG) structures is an attractive way to reduce surface wave excitation in printed antenna geometries so to mitigate the mutual coupling problem. This paper investigates the performance of a microstrip antenna phased array embedded in an EBG. A novel EBG array configuration is proposed, the bandgap feature of mushroom-like EBG has been studied, its band-gap feature of surface-wave suppression is demonstrated by plotting variations of the transmission coefficient S12 with frequency and dispersion diagram. The antenna design is verified by High Frequency Structural Simulator (HFSS), the simulating results show that the EBG design approach is a good candidate for a reduction in mutual coupling at certain frequencies between radiator elements, which in turn increases antenna directivity.
Electromagnetic Band Gap (Ebg) Structure Antenna Design for Wide Band Applications
International Journal of Advance Engineering and Research Development, 2015
Electromagnetic band gap (EBG) structures that are engineered to achieve desired transmission and reflection characteristics in specific frequency bands, have long been actively studied in the microwave regime for a wide variety of applications. They have also been used as superstrates for directivity enhancement of antennas as well as substrates for height reduction of conformal antennas.In this study we develop some guidelines for systematically designing Enhanced Bandwidth antenna systems, comprising of a microstrip patch antenna (MPA) covered by a planar EBG substrate. At the beginning, the investigations of EBG were mainly on wave interactions of these structures at optical frequencies and hence PBG emerged with the name of photonic band-gap structures.EBG is due to the interplay between macroscopic and microscopic resonances of a periodic structure.The major Area of interest EBG structure gain with its enomourous advantage it offers like Mutual Coupling, Surface Wave Suppression at microwave frequencies. In my study I Concentrate on Mashroom EBG antenna which is a part of planer structure of microstrip patch array and using multiple layers of substrate we can achieve great Bandwidth enhancement.
Study on band gap behaviour of electromagnetic band-gap (EBG) structure with microstrip antenna
2012
The popularity of microstrip antennas are increasing day by day because of easy analysis and fabrication, and their attractive radiation characteristics microsrip antenna using simple electromagnetic band gap (EBG) substrate has higher gain than conventional microstrip antenna In this paper we propose to mushroom like Electromagnetic Band Gap (EBG) structure with different diameter of vias was designed to analyze the behavior of the EBG structure. Mushroom-like electromagnetic band-gap (EBG) structures exhibit unique electromagnetic properties that have led to a wide range of electromagnetic device applications and A simple, compact EBG microstrip antenna is proposed in this study that covers a wideband of 2.5 to 3.7 GHz ISM band, Bluetooth and UHF RFID applications. The use of the EBG Structure improves the radiation pattern of the antenna. The electromagnetic band gap structure is a periodic structure which exhibit a band gap over a certain frequency range over which the propagation of the electromagnetic wave is prohibited. Zeland IE3D simulations have been carried out to investigate and characteristics of the performance with improved design is under consideration in EBG Structure.
Design Analysis of An Electromagnetic Band Gap Microstrip Antenna
American Journal of Applied Sciences, 2011
Problem statemet: Wideband compact antenna is highly demandable due to the dynamic development in the wireless technology. Approach: A simple, compact EBG microstrip antenna is proposed in this study that covers a wideband of 250 GHz and the design is conformal with the 2.45 GHz ISM band (WLAN, IEEE 802.11b and g)/Bluetooth/RFID applications. Results: A 6×6 array of square unit cell formed the EBG structure which is incorporated with the radiating patch to enhance the antenna performances. This design achieved an impedance bandwidth of 10.14% (2.34-2.59 GHz) at -10 dB return loss and VSWR ≤ 2. Simulated radiation pattern is almost omnideirectional. Conclusion/Recommendations: The simulated results prove the compatibility of the EBG antenna with the 2.45 GHz ISM band applications. Further enhancement of the antenna performance with improved design is under consideration.
Improved Microstrip Antennas with Novel EBG Structure for WLAN Applications
2020
In this paper, a novel simple compact electromagnetic band gap (EBG) configuration is proposed and analyzed using 3D finite difference time domain (FDTD) method. The proposed EBG structure consists of metallic square patches that arranged on ordered circular rings. The bandgap feature of surface wave suppression is demonstrated by calculating the transmission responses and near field distributions. From the investigated transmission curves, the surface wave bandgap is found to be 6.2 GHz and extends from 4.8 GHz to11 GHz. By inserting a 5.67 GHz patch antenna over the proposed 3-rings EBG structure, the -10 dB bandwidth has been enhanced by around 500% and the multiband ability is investigated. Further, the average value of the directivity over the wide frequency band has been improved by around 1.6 dB. On top of that, the design of 4-rings EBG structure is used to decrease the mutual coupling between two coupled rectangular patches with planar separation of quarter the wavelength b...
Co-design Approach for Wide-Band Asymmetric Cross Shaped Slotted Patch Antenna with LNA
Wireless Personal Communications, 2015
The proposed work presents a co-design approach for a new asymmetric rectangular cross shaped slotted patch antenna with low noise amplifier that occupies 17.2-25.8 GHz wide-band for SDR applications. This co-design approach minimizes the chip area and noise and also improves integration system over the bandwidth of 8.6 GHz. Three different architectures have been designed in this work. Firstly, a two stage CMOS CG-CS LNA is designed using a technique of series-parallel resonant network as an input matching network and as inter-stage matching network between CG and CS LNA. In second architecture stage, a rectangular shaped microstrip antenna is designed and a slot of asymmetric cross shape is cut on the patch antenna. In third architecture the slotted antenna is integrated with low noise amplifier in order to form a co-design approach in which series-parallel resonant network is used as a band pass filter between slotted patch antenna and LNA. A two-stage CMOS LNA design is simulated and layout is made using foundry design kit for the TSMC 65 nm CMOS process in ADS.v.12. A simulation result of LNA achieves S 11 of -21.4 dB with gain ranging from 7.4 to 21.3 dB over the wide-band of 19.
2021
In this paper, a new array antenna configuration based on Electromagnetic Band Gap (EBG) structures has been proposed for 3.5GHz wireless communication systems. The proposed slotted EBG structure, high impedance surface (SHI), consists of three squares and a square ring deposited on a substrate (Rogers RO4350) which has a relative permittivity of 10.2 and a thickness of 1.27mm. Initially a matrix of 3×7 unit cells of EBG structures is introduced between two patches of an array and then a matrix of 3×14 unit cell of EBG structures is integrated between eight patches, which resonate around 3.5GHz (Wi MAX). The insertion of these structures between the radiating elements of an array antenna reduces the mutual coupling and antenna dimensions by approximately (8dB, 11%) and (12 dB, 5%) respectively for two, eight elements array antenna. In addition, the directivity has been slightly improved in the presence of EBG structures, from 4.52dB to 6.09dB for a two-element array antenna, and fro...
Compact Ebg Structure for Alleviating Mutual Coupling Between Patch Antenna Array Elements
Progress In Electromagnetics Research, 2013
The periodic structure like electromagnetic band gap (EBG) is a hot research topic in the academia and RF-microwave industry due to their extraordinary surface wave suppression property. This study involved in designing a compact uni-planar type EBG structure for a 2.4 GHz resonant frequency band. Double folded bend metallic connecting lines are successfully utilized to realize a low frequency structure while a size reduction of 61% is achieved compared to the theoretically calculated size. From the transmission response, the surface wave band gap (SWBG) is found to be 1.2 GHz (1.91-3.11 GHz) whereas the artificial magnetic conductor (AMC) characteristic is observed at 3.3 GHz. The FEM based EM simulator HFSS is used to characterize the EBG structure. The SWBG property is utilized for alleviation of mutual coupling between elements of a microstrip antenna array. A 2 × 5 EBG lattice is inserted between the E-plane coupled array which reduced the coupling level by 17 dB without any adverse effect on the radiation performances.
Microwave and Optical Technology Letters, 2019
This paper presents a novel slotted wideband microstrip patch antenna array with 2 decoupling structures that enabled isolation enhancement between 10 and 40 dB throughout the operating bandwidth of 4-6.5 GHz. Four asymmetrical patches were first used as a unit cell to produce a multiresonance electromagnetic band gap (EBG) structure capable of increasing the isolation between the patch array by about 50 dB within the impedance bandwidth of 5.8-6.4 GHz. By introducing 3 double F-shaped etchings in the array ground plane, the isolation bandwidth is extended to 4.0-6.5 GHz (ie, 48%) with measured isolation improvement of 10-40 dB over the entire isolation bandwidth. The multiresonance EBG structure mitigates the surface waves propagating in the substrate while the double F-shaped ground plane reduces the surface waves traveling on the ground plane. The edge-to-edge spacing between the 2 patch antennas is 25.2 mm which is equivalent to 0.42 λ 0 (λ 0 is the freespace wavelength at the center frequency of 5.0 GHz). After loading the decoupling structures in the antenna array, the gain increased from 5.6 dB to 7 dB. The proposed antenna is fabricated and there is an acceptable agreement between the simulated and measured results. The antenna radiation characteristics are observed to be fairly consistent over the large operating bandwidth of 4-6.5 GHz. The proposed antenna is a potential candidate for wideband wireless applications in the sub-6 GHz band.