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Performance Improvement of an Archimedean Spiral Antenna for 2-18 GHz Applications

Roy, A and Vinoy, KJ and Martin, N and Mallegol, S and Quendo, C (2022) Performance Improvement of an Archimedean Spiral Antenna for 2-18 GHz Applications. In: IEEE Antennas and Wireless Propagation Letters, 21 (7). pp. 1383-1387.

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Official URL: https://doi.org/10.1109/LAWP.2022.3169274


Low-profile wideband spiral antennas suffer from poor impedance matching and cross polarization at lower frequencies or high variation in gain at higher frequencies. These significant differences, primarily caused by electromagnetic coupling with a conventional conductive backing, and the resulting interference are addressed in this letter by suitably designing the profile of the conductor. The proposed geometry has a maximum height of 0.08 λm at the minimum operating frequency and has wideband circular polarization performance with a good boresight gain response over 2-18 GHz range. After numerical investigations, a prototype antenna is fabricated and characterized. An excellent impedance matching and circular polarization behavior are measured close to 2 GHz while the variation in gain is limited between 5.8 and 8.6 dBic above 10 GHz. © 2002-2011 IEEE.

Item Type: Journal Article
Publication: IEEE Antennas and Wireless Propagation Letters
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords: Antenna feeders; Circular polarization; Impedance matching (electric); Microwave antennas, Antenna feeds; Archimedean spiral antennas; Conductor; Gain; Impedance matchings; Low-profile; Modified conical conductor; Performance; Spiral; Wide-band, Spiral antennas
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 21 Sep 2022 09:45
Last Modified: 21 Sep 2022 09:45
URI: https://eprints.iisc.ac.in/id/eprint/76698

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