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Design of a SIW Variable Phase Shifter for Beam Steering Antenna Systems

Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC V8W 2Y2, Canada
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Author to whom correspondence should be addressed.
Electronics 2019, 8(9), 1013; https://doi.org/10.3390/electronics8091013
Received: 26 July 2019 / Revised: 4 September 2019 / Accepted: 8 September 2019 / Published: 11 September 2019
(This article belongs to the Special Issue Millimeter-Wave (mmWave) Communications)
This paper proposes a new beam steering antenna system consisting of two variable reflection-type phase shifters, a 3 dB coupler, and a 90° phase transition. The entire structure is designed and fabricated on a single layer of substrate integrated waveguide (SIW), which makes it a low loss and low-profile antenna system. Surface mount tuning varactor diodes are chosen as electrical phase control elements. By changing the biasing voltage of the varactor diodes in the phase shifter circuits, the far-field radiation pattern of the antenna steers from −25° to 25°. The system has a reflection coefficient better than −10 dB for a 2 GHz bandwidth centered at 17 GHz, a directive radiation pattern with a maximum of 10.7 dB gain at the mid-band frequency, and cross polarization better than 20 dB. A prototype is fabricated and measured for design verification. The measured far-field radiation patterns, co and cross polarization, and the reflection coefficient of the antenna system agree with simulated results. View Full-Text
Keywords: beam steering antenna system; SIW technology; variable phase shifter; varactor diodes beam steering antenna system; SIW technology; variable phase shifter; varactor diodes
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Salem Hesari, S.; Bornemann, J. Design of a SIW Variable Phase Shifter for Beam Steering Antenna Systems. Electronics 2019, 8, 1013.

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