Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 19, Issue 12, Pages 2517-2521Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2020.3038404
Keywords
Compact; dual-circular polarization (CP); millimeter-wave (mmwave); notched; septum polarizer; substrate integrated waveguide (SIW)
Funding
- Natural Sciences and Engineering Research Council
- CMC Microsystems
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In this letter, a compact substrate-integrated waveguide (SIW) notched-septum polarizer is designed, manufactured, and tested. Metalized slots are used instead of vias in proximity to the notches to improve polarization purity. Animpedancematching bandwidth of 7.9% at 29 GHz and transmission coefficient of better than -1.6 dB are demonstrated. The axial ratio is less than 3 dB over a bandwidth of 4.5% at 29 GHz (sufficient for 5G). An implementation of the polarizer in an array antenna was measured to validate its reliability in antenna applications. Given its performance and small form-factor (length of lambda(o)/7 at 29 GHz), the proposed polarizer may be a good option for SIW circularly polarized endfire antennas in 5G mobile devices.
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