Estimating the Bandwidth of Spiral Antenna Arrays

Sáenz, Israel D. Hinostroza; Guinvarcrh, Regis; Haupt, Randy L.

doi:10.1109/lawp.2015.2508060

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Bandwidths Of Mode1

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2023

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Cited by 6 publications

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“…This is expected as the gaps are reducing the effective length of the arms. This reduction on the effective size of the antenna can be clearly seen by calculating their theoretical low cut-off frequency (using ring theory, see [4]) corrected due to reflections at the end of the arms (see [5]), or in this case reflections at the gap.…”

Section: Bandwidths Of Modementioning

confidence: 99%

Reconfigurable 4-Arm Spiral Antenna for Dual Polarization

Saenz

Guinvarc'H

Haupt

2020

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting

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4-arm spiral antennas have a wide bandwidth and circular polarization when operating in mode 1 (fundamental mode). Switching to mode 3 (to obtain opposite circular polarization) dramatically reduces the antenna bandwidth compared to mode 1. In this work we reduce the arm sizes of the spiral (for example with RF switches) to increase the bandwidth of mode 3 at the higher mode 1 frequencies. In this way the antenna has the same wide bandwidth for both polarizations (modes).Index Terms-4-arm spiral antenna, archimedean spiral, reconfigurable antenna, circular polarization, spiral antenna modes

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Section: Bandwidths Of Modementioning

confidence: 99%