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Low Loss, Wideband, and Compact CPW-Based Phase Shifter for Millimeter-Wave Applications.

Authors :
Abdellatif, Ahmed Shehata
Faraji-Dana, MohammadSadegh
Ranjkesh, Nazy
Taeb, Aidin
Fahimnia, Mehrdad
Gigoyan, Suren
Safavi-Naeini, Safieddin
Source :
IEEE Transactions on Microwave Theory & Techniques; Dec2014 Part 2, Vol. 62 Issue 12, p3403-3413, 11p
Publication Year :
2014

Abstract

This paper proposes a compact, low-loss, and low cost phase shifter for millimeter-wave phased array systems. The basic idea is to modify the propagation mode of a coplanar waveguide (CPW) by placing a high dielectric constant (40< \varepsilon r < 170) slab on top of it. The phase shift is varied by changing the air gap between the CPW line and the dielectric slab. A piezoelectric transducer has been used to control this air gap precisely. For fast but accurate modeling of the proposed phase shifter, two methods one based on spectral domain analysis and the other based on the conformal mapping have been developed and verified with full wave simulations and measurements. A prototype structure with the operational frequency range from 20 to 40 GHz is presented. The maximum phase shift obtained for the electrically controlled version at 40 GHz is 103 ^\circ with loss variation of 0.2 dB. The total length is 2 mm. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
00189480
Volume :
62
Issue :
12
Database :
Complementary Index
Journal :
IEEE Transactions on Microwave Theory & Techniques
Publication Type :
Academic Journal
Accession number :
100028718
Full Text :
https://doi.org/10.1109/TMTT.2014.2365539