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Title: Electrically tunable materials for microwave applications

Microwave devices based on tunable materials are of vigorous current interest. Typical applications include phase shifters, antenna beam steering, filters, voltage controlled oscillators, matching networks, and tunable power splitters. The objective of this review is to assist in the material selection process for various applications in the microwave regime considering response time, required level of tunability, operating temperature, and loss tangent. The performance of a variety of material types are compared, including ferroelectric ceramics, polymers, and liquid crystals. Particular attention is given to ferroelectric materials as they are the most promising candidates when response time, dielectric loss, and tunability are important. However, polymers and liquid crystals are emerging as potential candidates for a number of new applications, offering mechanical flexibility, lower weight, and lower tuning voltages.
Authors:
; ;  [1]
  1. Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada)
Publication Date:
OSTI Identifier:
22412794
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied physics reviews; Journal Volume: 2; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTENNAS; CERAMICS; COMPARATIVE EVALUATIONS; ELECTRIC POTENTIAL; FERROELECTRIC MATERIALS; FILTERS; FLEXIBILITY; LIQUID CRYSTALS; MICROWAVE RADIATION; OSCILLATORS; PHASE SHIFT; POLYMERS