Ultra-wideband circular polarized microstrip Archimedean spiral antenna loaded with chip-resistor

2004 ◽  
Author(s):  
C. Kinezos ◽  
V. Ungvichian
Keyword(s):  
Ultra Wideband ◽  
Spiral Antenna ◽  
Archimedean Spiral

scholarly journals Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1399
Author(s):  
Charl Baard ◽  
Yulang Liu ◽  
Natalia Nikolova
Keyword(s):  
Time Domain ◽  
High Efficiency ◽  
Low Cost ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Competitive Performance ◽  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Backward Radiation ◽  
Equiangular Spiral

A low-cost high-efficiency ultra-wideband (UWB) cavity-backed spiral antenna is proposed. It employs an equiangular spiral enclosed by an Archimedean spiral and it is fed through a tapered microstrip balun. A center-raised cylindrical absorber-free cavity backs the spiral to minimize the backward radiation without decreasing the efficiency. The cavity is designed to ensure an impedance bandwidth exceeding 16:1 ratio (from 350 MHz to 5.5 GHz). Simulated and measured results are presented and compared, demonstrating competitive performance in terms of impedance bandwidth and efficiency. Time–domain measurements indicate fidelity of 0.62 at boresight.

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
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