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Open AccessCommunication

Electronically Controllable Phase Shifter with Progressive Impedance Transformation at K Band

1
Department of Signal Theory, Telematics and Communications, Universidad de Granada—CITIC, 18071 Granada, Spain
2
Information Processing and Telecommunications Center, Universidad Politécnica de Madrid, 28040 Madrid, Spain
3
Bendable Electronics and Sensing Technologies (BEST) Group, School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(23), 5229; https://doi.org/10.3390/app9235229
Received: 11 November 2019 / Revised: 26 November 2019 / Accepted: 29 November 2019 / Published: 1 December 2019
(This article belongs to the Special Issue Passive Planar Microwave Devices)
This communication presents the design of a two-port electronically tunable phase shifter at K band. The phase shifter consists of a 3 dB hybrid coupler loaded with reflective phase-controllable circuits. The reflective circuits are formed by varactors and non-sequential impedance transformers which increase the operational bandwidth and the provided phase shift. The final phase shifter design is formed by two loaded-coupler stages of phase shifting to guarantee a complete phase turn. An 18 GHz phase shifter design with dynamic range of 600 degrees of phase shift is depicted in this document. The prototype is manufactured and validated through measurements showing good agreement with the simulation results. View Full-Text
Keywords: microwave tunable phase shifters; 3 dB/90° coupler; K band microwave tunable phase shifters; 3 dB/90° coupler; K band
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ElKhorassani, M.T.; Palomares-Caballero, A.; Alex-Amor, A.; Segura-Gómez, C.; Escobedo, P.; Valenzuela-Valdés, J.F.; Padilla, P. Electronically Controllable Phase Shifter with Progressive Impedance Transformation at K Band. Appl. Sci. 2019, 9, 5229.

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