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access icon free Aperture-coupled microstrip patch antenna fed by orthogonal SIW line for millimetre-wave imaging applications

© The Institution of Engineering and Technology
Received 06/05/2016, Accepted 06/12/2016, Revised 28/11/2016, Published 16/12/2016

A new microstrip patch antenna feeding technique for millimetre-wave imaging applications is proposed. The technique utilises a substrate integrated waveguide line that orthogonally feeds the patch antenna through a coupling aperture. A rectangular microstrip patch antenna was designed to operate at 32 GHz. Measurement and simulation results for rectangular patch antenna are presented showing good agreement with 9% bandwidth (|S 11| < −10 dB). The aperture-coupled rectangular patch antenna provided 5.5 dBi gain and 72% efficiency at the design frequency. Finally, the rectangular patch antenna is used for near-field and wideband synthetic aperture radar imaging to demonstrate the potential of the proposed antenna for imaging applications at millimetre wave frequencies.

Inspec keywords: aperture antennas; millimetre wave imaging; substrate integrated waveguides; microstrip antennas; rectangular waveguides; antenna feeds

Other keywords: rectangular microstrip patch antenna; gain 5.5 dB; substrate integrated waveguide line; aperture-coupled microstrip patch antenna fed; microstrip patch antenna feeding technique; millimetrewave imaging; orthogonal SIW line; frequency 32 GHz; wideband synthetic aperture radar imaging; aperture-coupled rectangular patch antenna

Subjects: Waveguides and microwave transmission lines; Antenna accessories; Single antennas; Microwave measurement techniques

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