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Title: Design methodology and performance analysis of a wideband 90° phase switch for radiometer applications

Abstract

This paper presents the analysis, design, and characterization of a wideband 90° phase switch in Ka-band. The phase switch is based on two microstrip bandpass filters in which the commutation is performed by a novel single-pole double-throw (SPDT) switch. The analysis of π-network bandpass filters is provided, obtaining the phase difference and amplitude imbalance between filters and their scattering parameters; tested results show an average phase difference of 88.9° ± 5° and an amplitude imbalance of 0.15 dB from 24 to 37 GHz. The new broadband SPDT switch is based on a coplanar waveguide-to-slotline-to-microstrip structure, which enables a full planar integration with shifting branches. PIN diodes are used to perform the switching between outputs. The SPDT shows isolation better than 19 dB, insertion loss of around 1.8 dB, and return loss better than 15 dB. The full integration of the phase switch achieves a return loss better than 11 dB and insertion loss of around 4 dB over the band 26–36 GHz, with an average phase difference of 87.1° ± 4° and an average amplitude imbalance of 0.3 dB. It provides an excellent performance for this frequency range, suitable for radio-astronomy receivers.

Authors:
; ; ; ;  [1]
  1. Department of Communications Engineering, University of Cantabria, Plaza de la Ciencia s/n, Santander 39005 (Spain)
Publication Date:
OSTI Identifier:
22250749
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 84; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; AMPLITUDES; PERFORMANCE; RADIOMETERS; SCATTERING; SWITCHES; WAVEGUIDES

Citation Formats

Villa, Enrique, Aja, Beatriz, Cagigas, Jaime, Fuente, Luisa de la, and Artal, Eduardo. Design methodology and performance analysis of a wideband 90° phase switch for radiometer applications. United States: N. p., 2013. Web. doi:10.1063/1.4849555.
Villa, Enrique, Aja, Beatriz, Cagigas, Jaime, Fuente, Luisa de la, & Artal, Eduardo. Design methodology and performance analysis of a wideband 90° phase switch for radiometer applications. United States. https://doi.org/10.1063/1.4849555
Villa, Enrique, Aja, Beatriz, Cagigas, Jaime, Fuente, Luisa de la, and Artal, Eduardo. 2013. "Design methodology and performance analysis of a wideband 90° phase switch for radiometer applications". United States. https://doi.org/10.1063/1.4849555.
@article{osti_22250749,
title = {Design methodology and performance analysis of a wideband 90° phase switch for radiometer applications},
author = {Villa, Enrique and Aja, Beatriz and Cagigas, Jaime and Fuente, Luisa de la and Artal, Eduardo},
abstractNote = {This paper presents the analysis, design, and characterization of a wideband 90° phase switch in Ka-band. The phase switch is based on two microstrip bandpass filters in which the commutation is performed by a novel single-pole double-throw (SPDT) switch. The analysis of π-network bandpass filters is provided, obtaining the phase difference and amplitude imbalance between filters and their scattering parameters; tested results show an average phase difference of 88.9° ± 5° and an amplitude imbalance of 0.15 dB from 24 to 37 GHz. The new broadband SPDT switch is based on a coplanar waveguide-to-slotline-to-microstrip structure, which enables a full planar integration with shifting branches. PIN diodes are used to perform the switching between outputs. The SPDT shows isolation better than 19 dB, insertion loss of around 1.8 dB, and return loss better than 15 dB. The full integration of the phase switch achieves a return loss better than 11 dB and insertion loss of around 4 dB over the band 26–36 GHz, with an average phase difference of 87.1° ± 4° and an average amplitude imbalance of 0.3 dB. It provides an excellent performance for this frequency range, suitable for radio-astronomy receivers.},
doi = {10.1063/1.4849555},
url = {https://www.osti.gov/biblio/22250749}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 12,
volume = 84,
place = {United States},
year = {Sun Dec 15 00:00:00 EST 2013},
month = {Sun Dec 15 00:00:00 EST 2013}
}