High‐power impedance tuner utilising substrate‐integrated evanescent‐mode cavity technology and external linear actuators. Issue 12 (8th July 2019)

• Record Type: Journal Article
• Authors: Semnani, Abbas; Shaffer, Garrett S.; Sinanis, Michael D.; Peroulis, Dimitrios
• Is Part Of: IET microwaves, antennas & propagation. Volume 13:Issue 12(2019)
• Page Start: 2067
• Page End: 2072
• Publication Date: 2019-07-08
• Subjects: cavity resonators -- printed circuits -- circuit tuning -- substrate integrated waveguides -- actuators; substrate‐integrated waveguide technology -- high‐resolution external linear actuators -- high‐power impedance tuner -- substrate‐integrated evanescent‐mode cavity technology -- electronically controlled impedance tuner -- EVA cavity resonators -- controlled coupled evanescent‐mode cavity resonators -- SIW technology -- contactless tuning mechanism -- Smith chart -- centre frequency -- electronic precise tuning -- printed circuit board -- PCB -- power 100.0 W -- frequency 3.3 GHz -- loss 0.56 dB; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2018.5761
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A 100 W electronically controlled impedance tuner is introduced and experimentally investigated here. The proposed tuner is composed of two individually controlled coupled evanescent‐mode (EVA) cavity resonators implemented on a printed circuit board (PCB) using substrate‐integrated waveguide (SIW) technology. The contactless tuning mechanism relies on two high‐resolution external linear actuators controlling the gap size of each resonator with submicron accuracy. A 3.3 GHz prototype tuner successfully handled up to 100 W of input power with ∼90% Smith chart coverage at the centre frequency and about 52% bandwidth demonstrating at least 50% coverage. Exhibiting low loss of 0.56 dB and very high stability as well, the proposed impedance tuner is a viable solution for high‐power applications where electronic precise tuning is desired.