Electronically Controllable Phase Shifter with Progressive Impedance Transformation at K Band El Khorassani, Mohamed Palomares Caballero, Ángel Alex Amor, Antonio Segura Gómez, Cleofás Escobedo Araque, Pablo Valenzuela Valdes, Juan Francisco Padilla De La Torre, Pablo Microwave tunable phase shifters 3 dB/90º coupler K band 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. 2020-02-14T09:10:22Z 2020-02-14T09:10:22Z 2019-12-01 journal article ElKhorassani, M. T., Palomares-Caballero, A., Alex-Amor, A., Segura-Gómez, C., Escobedo, P., Valenzuela-Valdés, J. F., & Padilla, P. (2019). Electronically Controllable Phase Shifter with Progressive Impedance Transformation at K Band. Applied Sciences, 9(23), 5229. http://hdl.handle.net/10481/59663 10.3390/app9235229 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España MDPI