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A low-cost wideband phase shifter for two-way mm-wave phased array antenna system

Published online by Cambridge University Press:  02 November 2017

Hussam Al-Saedi ,
Wael M. Abdel-Wahab ,
Suren Gigoyan ,
Aidin Taeb  and
Safieddin Safavi-Naeini
Hussam Al-Saedi*
Affiliation:
Department of Communication Engineering, University of Technology, Al Alsina'a Street, Baghdad, Iraq Department of Electrical and Computer Engineering, The Centre for Intelligent Antenna and Radio Systems (CIARS), University of Waterloo, Waterloo, Canada
Wael M. Abdel-Wahab
Affiliation:
Department of Electrical and Computer Engineering, The Centre for Intelligent Antenna and Radio Systems (CIARS), University of Waterloo, Waterloo, Canada C-COM Satellite Systems Inc., 2574 Sheffield Rd, Ottawa, ON K1B 3V7, Canada Electronics Research Institute (ERI), Cairo, Egypt
Suren Gigoyan
Affiliation:
Department of Electrical and Computer Engineering, The Centre for Intelligent Antenna and Radio Systems (CIARS), University of Waterloo, Waterloo, Canada
Aidin Taeb
Affiliation:
Department of Electrical and Computer Engineering, The Centre for Intelligent Antenna and Radio Systems (CIARS), University of Waterloo, Waterloo, Canada
Safieddin Safavi-Naeini
Affiliation:
Department of Electrical and Computer Engineering, The Centre for Intelligent Antenna and Radio Systems (CIARS), University of Waterloo, Waterloo, Canada
*
Corresponding author: Hussam Al-Saedi Email: hhalsaed@uwaterloo.ca
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Abstract

This paper presents a wideband, low-cost, high-performance, and continuous phase shifter for millimeter-wave (mm-wave) phased array systems. Its operational principle is based on modifying the propagation mode of a grounded coplanar waveguide (GCPW) line by placing a high dielectric constant slab over the GCPW line. The propagation constant and hence the phase shift is varied by changing the air gap height between the GCPW line and the dielectric slab. As a proof of concept, a piezoelectric transducer is used to precisely control this air gap height. A printed circuit board-based phase shifter prototype has been designed, fabricated, and tested at two different frequency bands (19–21 and 28.5–30.5 GHz), which are the downlink and uplink bands, respectively, of the Ka-band two-way satellite communication system. A continuous and almost linear phase–voltage characteristic has been achieved experimentally with average phase shift variations 170° and 260° over the two bands, respectively. The footprint of the proposed phase shifter is 2.1 mm×3 mm, which is quite small and suitable for low-profile mm-wave applications. The average insertion losses over the two bands are <0.53 and 2.35 dB with very low variations±0.22 and ±0.35 dB, respectively.

Keywords

Passive components and circuitsNew and emerging technologies and materialsTwo-way satellite communication
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Special Issue 1: Journee Nationale des Micro-ondes 2017 , February 2018 , pp. 77 - 86
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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