Mutual Coupling in Aperture-Coupled Patch Antennas Fed by Orthogonal SIW Line


In this paper, the mutual coupling of a rectangular microstrip patch antenna with an aperture-coupled feed by an orthogonal substrate integrated waveguide (SIW) feed line is presented. This feed design is beneficial for 2D array configurations in millimeter wave imaging systems due to the limited availability of space for such arrays. From the results, the proposed (compact size) antenna provides 7% bandwidth (|S11| < -10 dB), 65% total efficiency and 5 dB gain at 30 GHz. The mutual coupling of two antenna configurations (two antennas located collinearly with respect to their length and width) with center-to-center spacing of 0.4λ - 1.5λ are studied. The results show that there is less mutual coupling when the antennas are located collinear with respect to their width (due to the polarization from feed network). In addition, -17 dB mutual coupling for antennas with spacing of 0.5λ is shown for both cases.

Meeting Name

IEEE Antennas and Propagation Society International Symposium (2016: Jun. 26-Jul. 1, El Conquistador Resort Fajardo, Puerto Rico)


Electrical and Computer Engineering

Keywords and Phrases

Aperture Coupled Antenna; Microstrip Patch Antenna; Millimeter Wave Imaging; Mutual Coupling; Substrate Integrated Waveguide (SIW)

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


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© 2016 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jun 2016