scholarly journals Wideband circularly polarized cross‐dipole antenna with folded ground plane

2021 ◽  
Vol 15 (5) ◽  
pp. 451-456
Author(s):  
Lei Wang ◽  
Ke‐wen Chen ◽  
Quan Huang ◽  
Wei‐heng Shao ◽  
Wen‐xiao Fang ◽  
...  
Keyword(s):  
Ground Plane ◽  
Dipole Antenna ◽  
Circularly Polarized

Wideband circularly polarized antenna with metallic walls for L-band applications

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mohammad Pourbagher ◽  
Changiz Ghobadi ◽  
Javad Nourinia ◽  
Rahim Naderali
Keyword(s):  
Frequency Band ◽  
Phase Shifter ◽  
Ground Plane ◽  
Axial Ratio ◽  
Dipole Antenna ◽  
Impedance Bandwidth ◽  
Content Type ◽  
Circularly Polarized ◽  
Study Results ◽  
L Band

Purpose To achieve right-hand circular polarization (RHCP), a 3-dB Wilkinson power divider with a λ/4 phase shifter is used. The crossed-dipoles are placed at almost λ/4 elevation on the ground plane and connected to two coaxial cables. Experiments show that the impedance bandwidth of 49.40% (913.7–1,513.1 MHz) and axial ratio bandwidth (ARBW) of 22.88% (1,145.8–1,441.8 MHz) are achieved. Design/methodology/approach In this study, a wideband crossed-dipole antenna with circularly polarized (CP) radiation for L-band satellite and radar applications is presented. The proposed CP antenna comprises two orthogonally placed printed dipoles, a quadrature coupler and a box-shaped ground plane. Findings Furthermore, by fixing the box-shaped ground plane under the radiators, 5.13 dBic RHCP peak gain at 1,300 MHz and maximum half-power beamwidth (HPBW) of 84.5° at 1,170 MHz are realized for the antenna. Originality/value Eight metallic walls are connected to four corners of the substrate to stabilize the radiation properties in this study. Results show that the ARBW and front-to-back ratio are improved and the maximum HPBW around 127° across the operating frequency band is achieved. The proposed CP antenna is a good candidate for Global Positioning System (GPS) L2 (1.227 GHz), GPS L5 (1.176 GHz) and air route surveillance radar system at 1,215–1,390 MHz frequency band.

scholarly journals Novel L-Slot Matching Circuit Integrated with Circularly Polarized Rectenna for Wireless Energy Harvesting

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 651 ◽  
Author(s):  
Mohamed M. Mansour ◽  
Haruichi Kanaya
Keyword(s):  
Energy Harvesting ◽  
Radio Frequency ◽  
High Performance ◽  
Low Cost ◽  
Ground Plane ◽  
Single Layer ◽  
Dipole Antenna ◽  
Input Power ◽  
Circularly Polarized ◽  
Compact Size

Radio frequency (RF) power harvesting allows wireless power delivery concurrently to several remote RF devices. This manuscript presents the implementation of a compact, reliable, effective, and flexible energy harvesting (EH) rectenna design. It integrates a simple rectifier circuit with a circularly polarized one-sided slot dipole antenna at 2.45 GHz Industrial, Scientific, Medical (ISM) frequency band for wireless charging operation at low incident power densities, from 1 to 95 μ W/cm 2 . The rectenna structure is printed on a single layer, low cost, commercial FR4 substrate. The integration of the rectifier and antenna produces a low-profile and high performance circularly polarized rectenna. In order to maximize the system efficiency, the matching circuit introduced between the rectifier and antenna is optimized for a minimum number of discrete components and it is constructed using multiple of L-slot defects in the ground plane. For a given input power of − 6 dBm intercepted by the circularly polarized antenna with 3 dBi gain, the peak RF-DC (radio frequency-direct current) conversion efficiency is 59.5 % . The rectenna dimensions are 41 × 35.5 mm 2 . It is demonstrated that the output power from the proposed rectenna is higher than the other published designs with a similar antenna size under the same ambient condition. Thanks to its compact size, the proposed rectenna finds a range of potential applications for wireless energy charging.

Integrated Low-Profile Low Radar Cross Section Circularly Polarized Dipole Antenna Array

2021 ◽  
pp. 1-1
Author(s):  
Cheng Jin ◽  
Binchao Zhang ◽  
Liyuan Yin ◽  
Qihao Lv ◽  
Lingwen Kong ◽  
...  
Keyword(s):  
Antenna Array ◽  
Cross Section ◽  
Radar Cross Section ◽  
Dipole Antenna ◽  
Circularly Polarized ◽  
Low Profile

scholarly journals CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 651-655 ◽  
Author(s):  
Yilin Liu ◽  
Kama Huang
Keyword(s):  
Antenna Array ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Axial Ratio ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Feeding Method ◽  
Circularly Polarized ◽  
Low Profile ◽  
Novel Design

Abstract A novel design of a coplanar waveguide (CPW) feed antenna array with circular polarization (CP) and a high front-to-back ratio is described. The proposed CP array is achieved by using a compact CPW–slotline transition network etched in the ground plane. The measured results show that this kind of feeding method can improve the impedance bandwidth, as well as the axial ratio bandwidth of the CP antenna array and provide adequate gain. The proposed array can achieve a 6.08% impedance bandwidth and a 4.10% CP bandwidth. Details of the antenna design and experimental results are presented and discussed.

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