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Tunable ferroelectric coplanar waveguide phase shifters for high performance phased array with analog beam steering capability

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Item Summary

Title: Tunable ferroelectric coplanar waveguide phase shifters for high performance phased array with analog beam steering capability
Authors: Lee, Yip Loon
Keywords: analog beam steering capability
Issue Date: Dec 2011
Publisher: [Honolulu] : [University of Hawaii at Manoa], [December 2011]
Abstract: Phased antenna arrays are often used in radio frequency tracking systems including radars, satellite and other communication systems. For precise tracking and in developing efficient communication systems, arrays with narrow beam-width are required. This necessitates the use of a large number of radiating elements in the array and consequently a large number of phase shifter to provide the required beam-forming and beam steering capabilities. This makes these large phased antenna arrays prohibitively expensive and there is a significant need to develop low cost systems but with comparable performance. Studies on this subject showed that cost and size reduction could be achieved by combining digital and analog phase shifters technologies. In this study we focus on the development of a low cost analog phase shifters using co-planar waveguide (CPW) loaded with ferroelectric material. With application of bias voltage, complex permittivity of ferroelectric material changes, and this result in change in phase between array elements fed by the CPW. In this thesis we present design, fabrication, and testing of such ferroelectric loaded CPW phase shifters. Simulation results are verified experimentally and through comparison with available data in literature. The effect of the CPW substrate on the phase shifter performance was also experimentally examined.
Description: M.S. University of Hawaii at Manoa 2011.
Includes bibliographical references.
Appears in Collections:M.S. - Electrical Engineering

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