Coverage area enhancement of 2.4 GHz RFID system using switched beam patch antenna array

2016 ◽  
Vol 58 (8) ◽  
pp. 1945-1948
Author(s):  
Kamran Zahid ◽  
Zeeshan Zahid ◽  
Kashif Siddique
Keyword(s):  
Antenna Array ◽  
Patch Antenna ◽  
Coverage Area ◽  
Rfid System

Comparison Between Three Radiation Pattern Using Butler Matrix For Beamforming Network

2012 ◽  
Author(s):  
Asiti Zuraidah Ibrahim ◽  
Mohamad Kamal A.Rahim
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Patch Antenna ◽  
Monopole Antenna ◽  
Coverage Area ◽  
Butler Matrix ◽  
Multiple Beams ◽  
Pattern Characteristic ◽  
Array Beamforming ◽  
Half Power

Butler Matrix merupakan jaringan pembentuk alur (BFN), berfungsi sebagai jaringan suapan kepada tatasusun antena. Ia menghasilkan pelbagai nilai anjakan fasa progresif pada arus yang diujakan kepada antena. Dengan menyepadukan Butler Matrix bersama tatasusun antena, banyak sinaran pada corak radiasi boleh dihasilkan. Dalam kerja ini, tiga jenis tatasusun antena yang berbeza disepadukan dengan Matrik Butler dan corak radiasi untuk setiap konfigurasi dibandingkan. Antena yang dipilih dalam projek ini adalah 4 × 1 antena tampalan segi empat sama dengan suapan proximity, 4 × [4 × 2] tatasusun antena dan 4 × 1 antena eka-kutub. Ia diplih kerana setiap satu daripadanya mempunya ciri–ciri corak radiasi yang berbeza. Keputusan yang diperolehi menunjukkan empat sinaran yang berasingan dengan sudut yang berbeza dihasilkan oleh setiap tatasusun di mana antena tampalan segi empat sama mempunyai Lebarjalur Setengah Kuasa (HPBW) sebanyak 30° untuk setiap sinaran dan berjaya meliputi 120° kawasan liputan, 4 × 2 tatasusun antenna mempunyai HPBW sebanyak 7° dan meliputi 30° manakala antenna eka–kutub menghasilkan dua jenis sinaran, lebar dan sempit. Perbandingan antara pengukuran dan pengiraan corak radiasi untuk setiap tatasusun antena juga dibentangkan. Kata kunci: Antena pelbagai sinaran; 4 × 4 Matrik ; antena microstrip; tatasusun antena; jaringan pembentuk alur Butler Matrix is a beamforming network (BFN), functioning as a feeding network of antenna array. It provides multiple values of progressive phase different of excitation current to an antenna array. By integrating Butler Matrix with antenna array, multiple beams on radiation pattern could be created. In this work, three different types of antenna array have been integrated with the same Butler Matrix and the radiation patterns of each configuration have been compared. The chosen antenna types in this project are 4 × 1 proximity feed square patch antenna array, 4 × [4 × 2] antenna array and 4 × 1 monopole antenna array. They are chosen as each of them has different radiation pattern characteristic. The obtained results show that four independent beams with different angles are generated by individual array where square patch antenna array has Half Power Beamwidth (HPBW) about 30° for each beams and manage to cover 120° of coverage area, [4 × 2] antenna array has HPBW about 7° and cover 30° while monopole antenna produce two kind of beams, broader and narrower beams. The comparison between the measured and computed radiation pattern of each antenna array are presented. Key words: Multibeam antenna; 4 × 4 Butler Matrix; microstrip antenna; antenna array; beamforming network

Passive and Active Verification of Serial-Fed Patch Antenna Array for 77 GHz Automotive Corner Radar

2020 ◽  
Author(s):  
Wogong Zhang ◽  
Nannan Li ◽  
Ziyang Zheng ◽  
Liyun Shi ◽  
Zhiyong Li ◽  
...  
Keyword(s):  
Antenna Array ◽  
Patch Antenna ◽  
77 Ghz

scholarly journals Microwave Wireless Power Transfer System Based on a Frequency Reconfigurable Microstrip Patch Antenna Array

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 415
Author(s):  
Haiyue Wang ◽  
Lianwen Deng ◽  
Heng Luo ◽  
Junsa Du ◽  
Daohan Zhou ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Antenna Array ◽  
Patch Antenna ◽  
Wireless Power Transfer ◽  
Microstrip Patch Antenna ◽  
Market Demand ◽  
Power Transfer ◽  
Wireless Power ◽  
Microstrip Patch ◽  
Wide Range

The microwave wireless power transfer (MWPT) technology has found a variety of applications in consumer electronics, medical implants and sensor networks. Here, instead of a magnetic resonant coupling wireless power transfer (MRCWPT) system, a novel MWPT system based on a frequency reconfigurable (covering the S-band and C-band) microstrip patch antenna array is proposed for the first time. By switching the bias voltage-dependent capacitance value of the varactor diode between the larger main microstrip patch and the smaller side microstrip patch, the working frequency band of the MWPT system can be switched between the S-band and the C-band. Specifically, the operated frequencies of the antenna array vary continuously within a wide range from 3.41 to 3.96 GHz and 5.7 to 6.3 GHz. For the adjustable range of frequencies, the return loss of the antenna array is less than −15 dB at the resonant frequency. The gain of the frequency reconfigurable antenna array is above 6 dBi at different working frequencies. Simulation results verified by experimental results have shown that power transfer efficiency (PTE) of the MWPT system stays above 20% at different frequencies. Also, when the antenna array works at the resonant frequency of 3.64 GHz, the PTE of the MWPT system is 25%, 20.5%, and 10.3% at the distances of 20 mm, 40 mm, and 80 mm, respectively. The MWPT system can be used to power the receiver at different frequencies, which has great application prospects and market demand opportunities.

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