Abstract
A circularly symmetric high-impedance surface (HIS) is used as a ground plane in the design of a low-profile two-arm spiral antenna. It is shown through simulations that an HIS with circular periodicity provides 16% and 11.3% greater operational and fractional bandwidths, respectively, for spiral antennas compared to canonical rectangular HISs. It is also observed that with the aid of a circular HIS ground plane, the gain of the spiral antenna increases for 2.5 dB compared to when a rectangular HIS is used as a ground plane. Measurements are performed to validate the simulations; a very good agreement is indicated.
Original language | English (US) |
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Article number | 7723849 |
Pages (from-to) | 1080-1083 |
Number of pages | 4 |
Journal | IEEE Antennas and Wireless Propagation Letters |
Volume | 16 |
DOIs | |
State | Published - 2017 |
Keywords
- Circular high-impedance surface (HIS)
- low-profile design
- spiral antenna
- wideband balun
- wideband element
ASJC Scopus subject areas
- Electrical and Electronic Engineering