A compact dual-circularly polarized cavity-backed ring-slot antenna
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Date
Authors
Ferreira, Riaan
Joubert, Johan
Odendaal, J.W. (Johann Wilhelm)
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers
Abstract
A low profile dual-circularly polarized printed ring-slot
antenna with a small footprint, which radiates above an open cavity
loaded with an artificial magnetic conducting reflector, is presented.
The feed network consists of two T-shaped capacitive feed structures
connected to a miniaturized hybrid branch-line coupler. Experimental
results for a final antenna design (with a size of 0.5λ0 × 0.5λ0 ×
0.057λ0) show a 4% isolation bandwidth between the two ports of the
dual-circularly polarized antenna and a maximum gain of approximately
6.8 dBic. Good front-to-back ratios and low cross-polarization were
achieved. These very compact and low profile antennas are suitable
for 2.4 GHz wireless local area network (WLAN) communication systems.
Description
Keywords
Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN)
Sustainable Development Goals
Citation
Ferreira, R, Joubert, J & Odendaal, JW 2017, 'A compact dual-circularly polarized cavity-backed ring-slot antenna', IEEE Transactions on Antennas and Propagation, vol. 65, no. 1, art# 7797250, pp. 364-368.