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An antenna formed by the union of a four-armed, reflective-backed spiral antenna with a top-fed quadrifilar helix, operating over the 0.35-2.6-GHz band, is presented. The antenna features a novel dual-layering scheme that allows the modal impedance of the four-armed spiral to be greatly reduced while maintaining the desirable self-complementary metallization. A reconfigurable end-loading scheme is also presented that allows the attachment of high power-handling resistive loads, which along with other design features enables the use of the antenna in high-power transmitting applications. Mode 1 VSWR less than 2.2 is maintained throughout the 0.35-2.6-GHz band. Respective cutoff and nominal gains of 0 and 7 dBiC with excellent pattern characteristics are demonstrated. Over 30 dB broadside cross-polarization discrimination and high conical pattern uniformity are also obtained.
Published in:
Antennas and Wireless Propagation Letters, IEEE
(Volume:11
)
Date of Publication: 2012
- Page(s):
- 338 - 341
- ISSN :
- 1536-1225
- INSPEC Accession Number:
- 12649840
- Digital Object Identifier :
- 10.1109/LAWP.2012.2191384
- Product Type:
- Journals & Magazines
- Date of Publication :
- 20 March 2012
- Date of Current Version :
- 09 April 2012
- Issue Date :
- 2012
- Sponsored by :
- IEEE Antennas and Propagation Society
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