scholarly journals Circular polarized patch antenna with wide 3‐dB axial ratio beamwidth and suppressed backward cross‐polarized radiation for high‐precision marine navigation applications

2021 ◽  
Author(s):  
Hongmei Liu ◽  
Yan Zhang ◽  
Yao Wang ◽  
Shaojun Fang ◽  
Zhongbao Wang
Keyword(s):  
High Precision ◽  
Patch Antenna ◽  
Axial Ratio ◽  
Marine Navigation ◽  
Polarized Radiation

scholarly journals A Slotted Single Feed Circularly Polarized Microstrip Patch Antenna with Suppressed Surface Wave Losses for WLAN Applications

2019 ◽  
Vol 9 (1S) ◽  
pp. 246-248
Keyword(s):  
Patch Antenna ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Microstrip Patch Antenna ◽  
Antenna Structure ◽  
Circularly Polarized ◽  
Microstrip Patch ◽  
Circular Patch Antenna ◽  
Circularly Polarized Radiation ◽  
Polarized Radiation

The circularly polarized microstrip antenna has been of great importance in WLAN applications. A circularly polarized slotted circular patch antenna with co-axial feed geometry has been designed to meet the requirements. The antenna designed has been slotted at several locations to make it radiate circularly polarized radiation. Two metallic cylindrical vias have been inserted near the two diametric ends of the slot to improve the realized gain of the antenna. The antenna structure is resonating at 6.4 GHz with 3dB axial ratio bandwidth of 200MHz and gain of 9.8dB has been observed.

A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS)

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 191-199
Author(s):  
M. K. Verma ◽  
Binod K. Kanaujia ◽  
J. P. Saini ◽  
Padam S. Saini
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Feeding Technique

AbstractA broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna for further improvement in performance. Measured 10-dB impedance bandwidth (IBW) and 3-dB axial ratio bandwidth (ARBW) of the proposed antenna are 32.31 % (3.14–4.35 GHz) and 20.91 % (3.34–4.12 GHz), respectively. The gain of the antenna is varied from 3.5 to 4.86dBi within 3-dB ARBW. Measured results matched well with the simulated results.

scholarly journals A Wideband Single-Fed, Circularly-Polarized Patch Antenna With Enhanced Axial Ratio Bandwidth for UHF RFID Reader Applications

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 55883-55892 ◽  
Author(s):  
Junlong Li ◽  
Hui Liu ◽  
Shuai Zhang ◽  
Miaohui Luo ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Rfid Reader

Compact Circularly Polarized Patch Antenna With Wide Axial-Ratio Beamwidth

2018 ◽  
Vol 17 (4) ◽  
pp. 714-718 ◽  
Author(s):  
Meng-Shuang Wang ◽  
Xiao-Qi Zhu ◽  
Yong-Xin Guo ◽  
Wen Wu
Keyword(s):  
Patch Antenna ◽  
Axial Ratio ◽  
Circularly Polarized

scholarly journals Beamwidth-Enhanced Low-Profile Dual-Band Circular Polarized Patch Antenna for CNSS Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Hongmei Liu ◽  
Chenhui Xun ◽  
Shaojun Fang ◽  
Zhongbao Wang
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Axial Ratio ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Coupled Line ◽  
Low Profile ◽  
Feed Network ◽  
Single Input ◽  
Half Power

A low-profile dual-band circular polarized (CP) patch antenna with wide half-power beamwidths (HPBWs) is presented for CNSS applications. Simple stacked circular patches are used to achieve dual-band radiation. To enhance the HPBW for the two operation bands, a dual annular parasitic metal strip (D-APMS) combined with reduced ground plane (R-GP) is presented. A single-input feed network based on the coupled line transdirectional (CL-TRD) coupler is also proposed to provide two orthogonal modes at the two frequency bands simultaneously. Experimental results show that the 10 dB impedance bandwidth is 32.7%. The 3 dB axial ratio (AR) bandwidths for the lower and upper bands are 4.1% and 6.5%, respectively. At 1.207 GHz, the antenna has the HPBW of 123° and 103° in the xoz and yoz planes, separately. And the values are 127° and 113° at 1.561 GHz.

scholarly journals Design of a Small-Size Broadband Circularly Polarized Microstrip Antenna Array

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Pingyuan Zhou ◽  
Zhuo Zhang ◽  
Mang He ◽  
Yihang Hao ◽  
Chuanfang Zhang
Keyword(s):  
Reflection Coefficient ◽  
Antenna Array ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Satellite Communications ◽  
Lateral Size ◽  
Circularly Polarized ◽  
Feeding Technique ◽  
Microstrip Antenna Array

A small-size 2×2 broadband circularly polarized microstrip antenna array is proposed in this article. The array has four broadband dual-feed U-slot patch antenna elements with circular polarization, and the sequential feeding technique is used to further enhance the 3 dB axial ratio bandwidth. The lateral size of the fabricated array is as small as 1.33λ0×1.33λ0, and the profile is only 0.04λ0. Measured results show that the overlapped −10 dB reflection coefficient and the 3 dB AR bandwidth is 53%, and the variation of the measured realized gain is less than 1 dB for S-band satellite communications (1.98–2.2 GHz).

Circularly Polarized Rectangular Microstrip Patch Antenna with Finite Ground Plane

2015 ◽  
Vol 4 (2) ◽  
pp. 74
Author(s):  
Sanyog Rawat ◽  
Kamlesh Kumar Sharma
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Axial Ratio ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Microstrip Patch ◽  
Rectangular Patch

<p class="Abstract"><span style="font-weight: normal;">In this paper a new geometry of patch antenna is proposed with improved bandwidth and circular polarization. The radiation performance of circularly polarized rectangular patch antenna is investigated by applying IE3D simulation software and its performance is compared with that of conventional rectangular patch antenna.</span> <span style="font-weight: normal;">Finite Ground truncation technique is used to obtain the desired results. The simulated return loss, axial ratio and smith chart with frequency for the proposed antenna is reported in this paper. It is shown that by selecting suitable ground-plane dimensions, air gap and location of the slits, the impedance bandwidth can be enhanced upto 10.15 % as compared to conventional rectangular patch (4.24%) with an axial ratio bandwidth of 4.05%.</span></p><p> </p><p> </p>

scholarly journals Elliptical Polarization by Light Scattering by Submicron Spheroids

1973 ◽  
Vol 52 ◽  
pp. 131-137
Author(s):  
Th. Schmidt
Keyword(s):  
Refractive Index ◽  
Light Scattering ◽  
Axial Ratio ◽  
Incident Radiation ◽  
Dust Particles ◽  
Elliptical Polarization ◽  
Polarized Radiation

Calculations have been carried out of single light scattering by Rayleigh type spheroidal dust particles. It can be shown that elliptical polarized radiation with e = v/p ≈ 0.15 can be produced from unpolarized incident radiation, in the case of dirty quartz particles with a refractive index m = 1.54 ± 0.4i and a geometrical axial ratio c: a ≈ 1:2.

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