Capacitively fed cavity-backed slot antenna in carbon-fiber composite panels

Galehdar, A, Callus, P, Rowe, W, Wang, C, John, S and Ghorbani, K 2012, 'Capacitively fed cavity-backed slot antenna in carbon-fiber composite panels', IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 1028-1031.


Document type: Journal Article
Collection: Journal Articles

Title Capacitively fed cavity-backed slot antenna in carbon-fiber composite panels
Author(s) Galehdar, A
Callus, P
Rowe, W
Wang, C
John, S
Ghorbani, K
Year 2012
Journal name IEEE Antennas and Wireless Propagation Letters
Volume number 11
Start page 1028
End page 1031
Total pages 4
Publisher Institute of Electrical and Electronics Engineers
Abstract A new form of a conformal load-bearing antenna structure that consists of a cavity-backed slot in a carbon-fiber reinforced polymer (CFRP) panel is presented. The antenna is fed via a coaxial cable and patches that capacitively couple energy into the highly conductive carbon fibers without the requirement to abrade off the nonconductive epoxy resin layer on the surface. Computational simulations, which are validated by experiments, show that this feed configuration is as effective as soldering in a brass slot antenna. Backing the slot with a CFRP cavity enhances gain and front-to-back ratio by 2 and 13 dB, respectively. Gain is increased further by orienting the inner surface ply of the CFRP cavity to the same direction as the local E-field. Finally, the dimensions of the slot and cavity are optimized to minimize the antenna size. The resultant low-profile cavity is 14% of the volume of the original antenna design, but maintains similar gain and resonant frequency.
Subject Antennas and Propagation
Composite and Hybrid Materials
Keyword(s) Carbon-fiber reinforced polymer (CFRP)
cavity backing
composite materials
slot antennas
DOI - identifier 10.1109/LAWP.2012.2214197
Copyright notice © 2012 IEEE
ISSN 1536-1225
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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