Switched beam patch array antenna using SPDT GaN HEMT switches

Abstract

International audienceIn this article, a single-fed 4-panel 4 x 1 patch array antenna operating at 2.43 GHz with switched beam capability is proposed. The design allows the beam to be switched between 4 discrete directions giving 360 degrees coverage. The antenna beam is switched over the azimuth plane for phi=0 degrees, phi=90 degrees, phi=180 degrees, and phi=270 degrees. The beam control is achieved using GaN-based HEMT SPDT switches. Only 3 SPDT switches are integrated directly into the structure, allowing its nature to be electrically controlled over the desired 4 directions. Simulated and measured reflection coefficients and radiation patterns for the 4 cases are presented and discussed, showing good agreement. The antenna gain is around 3.8 dB including switches losses at 2.43 GHz

24 GHz Long-Range Radar Transmitter Using Beam Switching

“…통상적으로 패치 안테나의 경우, 빔을 조향하기 위하 여 버틀러 매트릭스나 로트만 렌즈와 같은 수동 빔포밍 회로망을 사용하는데, 이 방법은 위상 천이 회로망의 손 실이 크고, 전체 송신기의 크기가 매우 커지는 단점이 있 다 [2] . 위상 천이기를 쓰면 상대적으로 작은 사이즈로 빔 포밍이 가능하나, 24 GHz에서는 해당 전자부품을 구하기 도 어려울 뿐더러 손실도 커서 전력 낭비가 심한 문제점 이 있다 [3] . [4] .…”

Design of GaN-based Microwave Components and Application to Novel High Power Reconfigurable Antennas

“…Conference in Paris in 2015 [150]. Furthermore, a part of the work of the beam steering patch antenna arrays using GaN SPDT switch that was presented in Chapter IV section 4 will be presented at the European Conference on Antennas and Propagation in Paris in 2017 [152] and also based on the antenna work one journal paper is expecting to be submitted for publication.…”