A Single-Layer Dual Circularly Polarized SIW Cavity-Backed Patch Filtenna With Wide Axial Ratio Bandwidth

2021 ◽  
pp. 1-1
Author(s):  
Wenlei Wang ◽  
Huayan Jin ◽  
Weiliang Yu ◽  
Xiao Hong Zhang ◽  
Fan Wu ◽  
...  
Keyword(s):  
Single Layer ◽  
Axial Ratio ◽  
Circularly Polarized

scholarly journals Dual-Mode Circular Polarization Selective Surface Cell for Single-Layer Dual-Band Circularly Polarized Reflectarray

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Zheng Liu ◽  
Xue Lei ◽  
Jun-Mo Wu ◽  
Zhi-Jian Xu
Keyword(s):  
Circular Polarization ◽  
Three Dimensional ◽  
Discrimination Performance ◽  
Single Layer ◽  
Axial Ratio ◽  
Dual Band ◽  
Dual Mode ◽  
Circularly Polarized ◽  
Cell Rotation ◽  
Measured Efficiency

A dual-mode circular polarization selective surface (CPSS) cell based on a modification of the Pierrot cell is presented for single-layer dual-band circularly polarized (CP) reflectarray antenna design. To achieve dual-mode CP discrimination performance, the improved three-dimensional geometry and the high-order resonances of the CPSS cell are utilized. The required phase shifts in both modes are obtained by varying the cell rotation angle. A single-layer dual-band reflectarray operating with orthogonal CPs has been fabricated and tested. Measured results show the peak gains of 25.2 dBi at 11.6 GHz with 31% 3 dB axial ratio (AR) bandwidth and 26.5 dBi at 14.6 GHz with 32% 3 dB AR bandwidth, respectively. The measured efficiency is 41.2% at 11.6 GHz and 55.5% at 14.6 GHz.

Reactive impedance surface-based broadband circularly polarized Koch fractal boundary microstrip antenna

2014 ◽  
Vol 8 (2) ◽  
pp. 243-250
Author(s):  
V. V. Reddy ◽  
N.V.S.N. Sarma
Keyword(s):  
Single Layer ◽  
Axial Ratio ◽  
Fractal Boundary ◽  
Impédance Surface ◽  
Broadband Antenna ◽  
Impedance Surface ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Koch Fractal ◽  
Iteration Order

A circularly polarized (CP) broadband antenna is proposed for wireless applications in the range of 2–3 GHz frequency. It consists of asymmetrical Koch fractal boundary patch over a reactive impedance surface (RIS) substrate. The simulations of single-layer Koch fractal antenna, dual layer with square and fractal RIS elements are carried out in a systematic way for broadband CP radiation and corresponding results are presented. For better CP characteristics, properties of fractal curves and dimensions of RIS elements are optimized. The antenna with fractal RIS iteration order one (iteration1) is experimentally studied. The 10-dB return loss bandwidth is 50.35%, whereas 3-dB axial ratio bandwidth is 7.45%, which indicate that by applying fractals concept to RIS technique, with a single probe feed, broadband CP radiation can be obtained.

scholarly journals Design of Modified Single-Layer Double U-Type Linear to Circular Polarization Convertor

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Haoming Hu ◽  
Dongfang Zhou ◽  
Guohu Chen ◽  
Tianpeng Li ◽  
Jun Gao
Keyword(s):  
Insertion Loss ◽  
Single Layer ◽  
Axial Ratio ◽  
Frequency Selective Surface ◽  
Metal Plate ◽  
Circuit Board ◽  
Circularly Polarized ◽  
Periodic Arrays ◽  
Linearly Polarized ◽  
Polarization Convertor

This paper proposes single-layer periodic arrays of freestanding slot frequency-selective surface (FSS) as an approach to convert linearly polarized wave to circularly polarized wave. The double U-type structure is etched on a metal plate rather than a traditional print circuit board (PCB) material. It has the characteristics of broadband and could be applied to the situation of large incident angles. Numerical simulations have been carried out, and the prototype structures have been fabricated and experimentally validated. The whole thickness is only 1 mm, and the results show that 3 dB axial ratio (AR) bandwidth is 36.6% at normal incident (16.5% at ±60°). An insertion loss of under 3 dB can be achieved within the whole AR bandwidth.

Single layer single probe feed circularly polarized triple band fractal boundary microstrip antenna for wireless applications

2016 ◽  
Vol 9 (3) ◽  
pp. 657-664 ◽  
Author(s):  
V.V. Reddy ◽  
N.V.S.N. Sarma
Keyword(s):  
Microstrip Antenna ◽  
Single Layer ◽  
Axial Ratio ◽  
Cost Effective ◽  
Fractal Boundary ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Multiband Antennas ◽  
Single Probe ◽  
Triple Band

Triple band circularly polarized fractal boundary microstrip antenna is proposed and experimentally studied. The two orthogonal sides of the square patch are replaced with asymmetrical fractal curves for circular polarization (CP) radiation. A 45° rotated asymmetrical fractal slot is embedded at the center of the fractal patch for triband CP operation. The indentation factors of the fractal curves are optimized for better CP emission. The inserted fractal slot redistributes the current elements on the patch for triband CP radiation. The proposed antenna is implemented over a single layer with a single probe feed, so it is simple to fabricate and is cost effective when compared with the existing stacked layered multiband antennas in the open literature. The measured 3 dB axial ratio bandwidths of the proposed antenna at 2.4, 3.4, and 5.8 GHz are 2, 1, and 1.8%, respectively, so it is well suited for WLAN and Wi-MAX wireless applications.

Novel High-Gain Circularly Polarized Lens Antenna Using Single-Layer Transmissive Metasurface

Frequenz ◽  
2017 ◽  
Vol 71 (5-6) ◽  
Author(s):  
Yaqiang Zhuang ◽  
Guangming Wang ◽  
Haipeng Li ◽  
Wenlong Guo
Keyword(s):  
Patch Antenna ◽  
Focal Point ◽  
Layer Structure ◽  
Single Layer ◽  
Axial Ratio ◽  
High Gain ◽  
Attractive Alternative ◽  
Lens Antenna ◽  
Circularly Polarized ◽  
Low Profile

AbstractA high-gain lens antenna employing single-layer focusing metasurface (MS) is proposed in this article. The single-layer element achieves a 360° transmission phase range with a transmission magnitude better than 0.9. And the focusing MS consists of 169 elements was designed by utilizing the technique of varying rotation angle to compensate the phase delay. Thus, a lens antenna is constructed by placing a circularly polarized (CP) patch antenna at the focal point of the MS. The fabricated lens antenna demonstrates a good performance of 4.6 % 3-dB axial ratio bandwidth and 6 % 1-dB gain bandwidth, respectively. Moreover, the maximum gain is 18.3 dBic at 15 GHz, which is enhanced by 11.4 dBic compared with the patch antenna. Due to the single-layer structure, this design has a low profile and easy fabrication process compared with the conventional designs, making it an attractive alternative to compact high-gain antenna.

scholarly journals Circularly Polarized Antenna Array Fed by Air-Bridge Free CPW-Slotline Network

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Yilin Liu ◽  
Kama Huang ◽  
Xia Luo
Keyword(s):  
Antenna Arrays ◽  
Simple Structure ◽  
Coplanar Waveguide ◽  
Single Layer ◽  
Axial Ratio ◽  
Circularly Polarized ◽  
Microstrip Patch ◽  
Low Profile ◽  
Measured Impedance ◽  
Novel Design

A novel design of 1×2 and 2×2 circularly polarized (CP) microstrip patch antenna arrays is presented in this paper. The two CP antenna arrays are fed by sequentially rotated coplanar waveguide (CPW) to slotline networks and are processed on 1 mm thick single-layer FR4 substrates. Both of the two arrays are low-profile and lightweight. An air-bridge free CPW-slotline power splitter is appropriately designed to form the feeding networks and realize the two CP antenna arrays. The mechanism of circular polarization in this design is explained. The simulated and measured impedance bandwidths as well as the 3 dB axial ratio bandwidths and the radiation patterns of the two proposed antenna arrays are presented. This proposed design can be easily extended to form a larger plane array with good performance owing to its simple structure.

scholarly journals Single-Layer, Dual-Port, Dual-Band, and Orthogonal-Circularly Polarized Microstrip Antenna Array with Low Frequency Ratio

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Min Wang ◽  
Dao-Yu Wang ◽  
Wen Wu ◽  
Da-Gang Fang
Keyword(s):  
Frequency Ratio ◽  
Satellite Communication ◽  
Low Frequency ◽  
Single Layer ◽  
Axial Ratio ◽  
Dual Band ◽  
Circularly Polarized ◽  
Power Dividers ◽  
Rectangular Patch ◽  
Microstrip Antenna Array

A single-layer, dual-port, dual-band, and dual circularly polarized (CP) microstrip array is designed for satellite communication in this paper. The operating frequencies are 8.2 and 8.6 GHz with a very low ratio of 1.05. First, a rectangular patch element is fed through microstrip lines at two orthogonal edges to excite two orthogonal dominant modes of TM01 and TM10. The very low frequency ratio can be realized with high polarization isolations. Then, a 2-by-2 dual-band dual-CP subarray is constructed by two independent sets of sequentially rotated (SR) feed structures. An 8-by-8 array is designed on the single-layer thin substrate. Finally, by utilizing one-to-four power dividers and semirigid coaxial cables, a 16-by-16 array is developed to achieve higher gain. Measured results show that the 16-by-16 array has 15 dB return loss (RL) bandwidths of 4.81% and 6.75% and 3 dB axial ratio (AR) bandwidths of 2.84% and 1.57% in the lower and the upper bands, respectively. Isolations of 18.6 dB and 19.4 dB and peak gains of 25.1 dBic and 25.6 dBic are obtained at 8.2 and 8.6 GHz, respectively.

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.

Bilayer split-ring chiral metamaterial based reconfigurable antenna for polarization conversion

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Preet Kaur ◽  
Pravin R. Prajapati
Keyword(s):  
Low Cost ◽  
Axial Ratio ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Split Ring ◽  
Circularly Polarized ◽  
Left Hand ◽  
Rectangular Patch ◽  
Mode 2 ◽  
Chiral Metamaterial

Abstract A bilayer split-ring chiral metamaterial converts the linearly polarized wave, into a nearly perfect left or right-handed circularly polarized wave. The proposed antenna is intended to operate at center frequency of 5.80 GHz with switchable polarization capability. The polarization re-configurability is achieved by electronically switching of two PIN-diode pairs, which are embedded into bilayer split-ring Chiral Metamaterial. The optimized length of rectangular patch is 16 mm and width is 12.1 mm. Two types of radiation characteristics offered by the proposed antenna; left hand circularly polarized in mode 1 and right hand circularly polarized in mode 2. Measured results show that its impedance bandwidth is 155 MHz from 5.70 to 5.855 GHz for both mode 1 and mode 2. The measured axial-ratio bandwidth is 100 MHz from 5.75 to 5.85 GHz for mode 1 and 110 MHz from 5.73 to 5.84 GHz for mode 2. Antenna has LHCP gain of 2.52 dBi and RHCP gain of −23 dBi in mode 1. RHCP gain of 2 dBi and polarization purity of about −20 dBi is obtained in mode 2. The proposed antenna has simple structure, low cost and it has potential application in field of wireless communication (i.e., WiMax, WLAN etc.).

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