Spiral antenna with coplanar strip line feed

H. Nakano; G. Hirokawa; J. Yamauchi; K. Hirose

doi:10.1049/el:19921367

Spiral antenna with coplanar strip line feed

Electronics Letters ◽

10.1049/el:19921367 ◽

1992 ◽

Vol 28 (23) ◽

pp. 2130 ◽

Cited By ~ 6

Author(s):

H. Nakano ◽

G. Hirokawa ◽

J. Yamauchi ◽

K. Hirose

Keyword(s):

Strip Line ◽

Spiral Antenna

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Two-arm Archimedean spiral antenna fed by broadband double sided parallel strip line

Microwave and Optical Technology Letters ◽

10.1002/mop.29931 ◽

2016 ◽

Vol 58 (8) ◽

pp. 1879-1883 ◽

Cited By ~ 2

Author(s):

Seongwon Oh ◽

Chihyung Ahn

Keyword(s):

Strip Line ◽

Spiral Antenna ◽

Archimedean Spiral ◽

Parallel Strip

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Single-Arm Archimedean Spiral Antenna with Broadband Circular Polarization

International Journal of Antennas and Propagation ◽

10.1155/2021/6623468 ◽

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.

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