Miniaturized single-feed cross-aperture coupled circularly polarized microstrip patch antenna


Journal Article

© 2016, Electromagnetics Academy. All rights reserved. A novel miniaturized single-feed cross-aperture coupled circularly polarized (CP) microstrip patch antenna loaded by four identical shorting strips is proposed and discussed. Each shorting strip underneath the edges of the radiating patch is connected to the ground plane via an array of three identical and equidistant shorting pins. With the assistance of the capacitance offered by the radiating patch and the shorting strips, and the inductance induced by the shorting pins, the patch size and overall size of the proposed antenna have been significantly reduced by 75% and 69%, respectively, compared with the conventional antenna. An antenna prototype with an overall size of 50mm × 50mm × 7.548mm (0.317λ0 × 0.317λ0 × 0.048λ0) and a patch size of 29.43mm × 27.85mm (0.186λ0 × 0.176λ0) has been fabricated and measured, which shows a measured 10-dB return loss bandwidth of 92MHz (4.76%) from 1.886 to 1.978 GHz with a maximum right-handed CP (RHCP) gain of 4.9 dBic. The measured 3-dB axial ratio (AR) bandwidth is 28MHz (1.46%) from 1.899 to 1.927 GHz with a 3-dB AR beamwidth of more than 140° across the operating bandwidth.

Full Text

Duke Authors

Cited Authors

  • Li, J; Guo, J; Zhang, A; Joines, WT; Liu, QH

Published Date

  • January 1, 2016

Published In

Volume / Issue

  • 63 /

Start / End Page

  • 183 - 191

Electronic International Standard Serial Number (EISSN)

  • 1530-9681

International Standard Serial Number (ISSN)

  • 1937-8718

Digital Object Identifier (DOI)

  • 10.2528/PIERC16031301

Citation Source

  • Scopus