title: Q-band 4-state phase shifter in planar technology: Circuit design and performance analysis.
abstract: A 30% bandwidth phase shifter with four phase states is designed to be integrated in a radio astronomy receiver. The circuit has two 90° out-of-phase microwave phase-shifting branches which are combined by Wilkinson power dividers. Each branch is composed of a 180° phase shifter and a band-pass filter. The 180° phase shifter is made of cascaded hybrid rings with microwave PIN diodes as switching devices. The 90° phase shift is achieved with the two band-pass filters. Experimental characterization has shown significant results, with average phase shift values of -90.7°, -181.7°, and 88.5° within the operation band, 35-47 GHz, and mean insertion loss of 7.4 dB. The performance of its integration in a polarimetric receiver for radio astronomy is analyzed, which validates the use of the presented phase shifter in such type of receiver.
authors: Department of Communications Engineering, University of Cantabria, Plaza de la Ciencia s/n, Santander 39005, Spain.
authors: E
authors: E
authors: Villa
authors: Erzia Technologies, Josefina de la Maza 4, Santander 39012, Spain.
authors: J
authors: J
authors: Cagigas
authors: Department of Communications Engineering, University of Cantabria, Plaza de la Ciencia s/n, Santander 39005, Spain.
authors: B
authors: B
authors: Aja
authors: Department of Communications Engineering, University of Cantabria, Plaza de la Ciencia s/n, Santander 39005, Spain.
authors: L
authors: L
authors: de la Fuente
authors: Department of Communications Engineering, University of Cantabria, Plaza de la Ciencia s/n, Santander 39005, Spain.
authors: E
authors: E
authors: Artal