Circularly Polarized Reflectarray With Microstrip Ring Elements Having Variable Rotation Angles

2004 ◽  
Vol 52 (4) ◽  
pp. 1122-1125 ◽  
Author(s):  
B. Strassner ◽  
C. Han ◽  
K. Chang
Keyword(s):  
Circularly Polarized ◽  
Microstrip Ring ◽  
Ring Elements

Single-Layer Broadband Circularly Polarized Reflectarray with Subwavelength Double-Ring Elements

2015 ◽  
Vol 35 (4) ◽  
pp. 217-226 ◽  
Author(s):  
Xian-Jiang Zhong ◽  
Lei Chen ◽  
Yan Shi ◽  
Xiao-Wei Shi
Keyword(s):  
Single Layer ◽  
Circularly Polarized ◽  
Double Ring ◽  
Ring Elements

Single-feed circularly polarized microstrip ring antenna and arrays

2000 ◽  
Vol 48 (7) ◽  
pp. 1040-1047 ◽  
Author(s):  
R.R. Ramirez ◽  
F. De Flaviis ◽  
N.G. Alexopoules
Keyword(s):  
Circularly Polarized ◽  
Ring Antenna ◽  
Microstrip Ring

A PRINTED DUAL-BAND DUAL-SENSE CIRCULARLY POLARIZED METAL-STRIP ANTENNA WITH DOUBLE SPLIT-RING ELEMENTS

2014 ◽  
Vol 53 ◽  
pp. 155-163 ◽  
Author(s):  
Guowei Zhang ◽  
Fu-Shun Zhang ◽  
Ya-Li Yao ◽  
Li Jiang ◽  
Qichang Li
Keyword(s):  
Metal Strip ◽  
Dual Band ◽  
Split Ring ◽  
Circularly Polarized ◽  
Ring Elements

scholarly journals Triple-Band Dual-Sense Circularly Polarized Hybrid Dielectric Resonator Antenna

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3899 ◽  
Author(s):  
Amir Altaf ◽  
Munkyo Seo
Keyword(s):  
Circular Polarization ◽  
Dielectric Resonator ◽  
Microstrip Line ◽  
Axial Ratio ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Left Handed ◽  
Measurement Results ◽  
Microstrip Ring ◽  
Triple Band

In this paper, a triple-band dual-sense circularly polarized (CP) hybrid dielectric resonator antenna is proposed. A modified hexagonal dielectric resonator (DR) is top-loaded with a square microstrip ring (SMR). A vertical-tapered-strip connected to a 50- Ω microstrip line is used to excite the proposed antenna. It is found that the lower and central CP bands correspond to left-handed circular polarization and are produced by the TM 11 and TE 111 modes of the SMR and modified hexagonal DR, respectively. The upper CP band is formed by the combination of the quasi-TM 21 mode of the SMR and quasi-TE 111 mode of the DR that exhibits right-handed circular polarization. The measurement results of the fabricated prototype show triple-band response for |S 11 | < −10 dB with impedance bandwidths (IBWs) of 17.4% (1.75–2.03 GHz), 28.13% (2.23–2.96 GHz), and 2.97% (3.65–3.76 GHz) in the lower, central, and upper bands, respectively. The measured 3 dB axial ratio bandwidths lying within −10 dB IBWs are 3.69% (1.86–1.93 GHz), 5.46% (2.67–2.82 GHz), and 2.15% (3.68–3.76 GHz) along with the peak gains of 5 dBic, 5.28 dBic, and 2.36 dBic in the lower, central, and upper bands, respectively.

scholarly journals A Broadband Single-Feed Circularly Polarized Patch Antenna with Wide Beamwidth

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Changhong Zhang ◽  
Junping Geng ◽  
Bin Zhou ◽  
Xianling Liang ◽  
Ronghong Jin
Keyword(s):  
Reflection Coefficient ◽  
Patch Antenna ◽  
Ground Plane ◽  
Side Wall ◽  
Axial Ratio ◽  
Resistive Load ◽  
Circularly Polarized ◽  
Measurement Results ◽  
Microstrip Ring ◽  
Matching Load

A broadband single-feed circularly polarized patch antenna with wide beamwidth is presented. The patch is coupled to four asymmetric cross slots via a microstrip ring with eight matching segments underneath the ground plane, traversing through the arms of the cross slots in a serial manner. And a coupling slice instead of a resistive load is used as matching load of the microstrip ring for higher gain. Furthermore, a metal side wall surrounding the antenna is used to improve the isolation between adjacent elements in an array. Through optimizing the four asymmetric cross slots and eight matching segments, excellent performances are achieved by the proposed antenna, especially for the broadband and wide beamwidth. Measurement results show that the antenna has −10 dB reflection coefficient bandwidth of 29.7%, 3-dB axial-ratio bandwidth of 21.6%, and beamwidth of more than 90°. It can be considered as a good candidate for the element of arrays.

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