Axial ratio improvement of an Archimedean spiral antenna over a radial AMC reflector

2012 ◽  
Vol 109 (4) ◽  
pp. 1081-1086 ◽  
Author(s):  
M. Grelier ◽  
C. Djoma ◽  
M. Jousset ◽  
S. Mallégol ◽  
A. C. Lepage ◽  
...  
Keyword(s):  
Axial Ratio ◽  
Spiral Antenna ◽  
Archimedean Spiral

scholarly journals Single-Arm Archimedean Spiral Antenna with Broadband Circular Polarization

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Qingyuan Fang ◽  
Mengzhe Jin ◽  
Weidong Liu
Keyword(s):  
Circular Polarization ◽  
Surface Current ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Strip Line ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Low Frequencies ◽  
Current Path ◽  
Measurement Results

In this paper, a single-arm Archimedean spiral (SAAS) antenna with broadband circular polarization is investigated. Unlike traditional single-arm Archimedean spiral antenna, the antenna arm consists of a hybrid meandered strip line and a smooth arc strip line. Especially at low frequencies, the meandered strip line significantly improves the circular polarization performance by extending the antenna surface current path. The effects of the meandered strip line on the radiation pattern and axial ratio (AR) are studied in detail. To obtain unidirectional radiation, a metallic cavity is added below the SAAS antenna. The measurement results show that the voltage standing wave ratio (VSWR) is less than 2 from 0.88 GHz to 8.82 GHz, which indicates a wide impedance bandwidth of 1 : 10 is realized. A wide AR bandwidth of 1 : 5 is available, that the measured AR is less than 3 dB from 1.6 GHz to 8 GHz.

scholarly journals Hybrid Utilization of Loading Techniques and Cavity Groove for Performance Enhancement of the UWB (2–18 GHz) Spiral Antenna

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Muhammad Hamza ◽  
Wasif T. Khan
Keyword(s):  
Performance Metrics ◽  
Performance Enhancement ◽  
Axial Ratio ◽  
Ultra Wideband ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Hybrid Techniques ◽  
Efficient Performance ◽  
Capacitive Effect ◽  
Uwb Applications

This paper presents, for the first time, the hybrid use of loading techniques (which involve terminating the spiral arms with different structures to give a resistive or capacitive effect) and a novel technique of cavity groove in order to enhance the performance of two-arm, cavity-backed, 2–18 GHz spiral antenna. The antenna is made on Duroid 5880 and has the smallest form factor (50 mm diameter), meeting all the performance metrics, which are targeted for efficient performance of a spiral antenna for ultra-wideband (UWB) applications. Measured results match the simulated results and show that by the utilization of hybrid loading and cavity groove, the gain is increased by a factor of 3.65 dBi and the axial ratio is improved by 2.73 dB at (2 GHz) as compared to a simple Archimedean antenna made on Duroid 5880, without increasing the size. The proposed antenna shows 2.25 dB more gain and improved axial ratio performance as compared to a simple Archimedean spiral antenna made on Tmm4, without the utilization of the hybrid techniques proposed earlier in the literature.

Cavity-backed Archimedean spiral antenna with strip absorber

2008 ◽  
Vol 2 (7) ◽  
pp. 725-730 ◽  
Author(s):  
H. Nakano ◽  
H. Oyanagi ◽  
J. Yamauchi ◽  
S. Sasaki
Keyword(s):  
Spiral Antenna ◽  
Archimedean Spiral

scholarly journals A NOVEL COMPACT ARCHIMEDEAN SPIRAL ANTENNA WITH GAP-LOADING

2008 ◽  
Vol 3 ◽  
pp. 169-177 ◽  
Author(s):  
Qing Liu ◽  
Cheng-Li Ruan ◽  
Lin Peng ◽  
Wei-Xia Wu
Keyword(s):  
Spiral Antenna ◽  
Archimedean Spiral
Sign in / Sign up

Export Citation Format

Share Document