Microwave phase shifters based on sol-gel derived Ba0.3Sr0.7TiO3 ferroelectric thin films

In this paper, we report on the performance of microwave phase shifters implemented on sol-gel derived Ba0.3Sr0.7TiO3 (BST) thin films. Coplanar waveguide (CPW) phase shifters, loaded-line phase shifters, and reflection-type digital phase shifters have been realized on a single alumina substrate covered with a 300nm-thick BST film. The performances of different types of phase shifting cells are compared. It is shown that the optimally designed digital phase shifters have better performance although the digital nature of the operation limits the range of their possible applications. A figure of merit FoM = 100 degrees/dB at f = 20GHz and E = 400kV/cm is demonstrated for the one-bit digital phase shifter.


Published in:
2007 European Microwave Conference, Vols 1-4, 1295-1298
Presented at:
37th European Microwave Conference, Munich, GERMANY, Oct 08-12, 2007
Year:
2007
Publisher:
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa
ISBN:
978-2-87487-001-9
Keywords:
Laboratories:




 Record created 2012-07-04, last modified 2018-09-13


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