DocumentCode :
880974
Title :
Ferroelectric Phase Shifters for VHF and UHF
Author :
Cohn, M. ; Eikenberg, A.F.
Volume :
10
Issue :
6
fYear :
1962
fDate :
11/1/1962 12:00:00 AM
Firstpage :
536
Lastpage :
548
Abstract :
The analysis, construction, and performance of compact surface wave ferroelectric phase shifters suitable for operation in the100-to1000-MC frequency range are described. Although this ferroelectric loaded parallel-plane structure is a very low impedance structure, a satisfactory terminal impedance matching technique has been devised. Kilovolt level voltages are needed; but since the current required to maintain or rapidly shift phase is low, the over-all control power requirements are at least an order of magnitude less than those for comparable ferrite phase shifters. One of these room temperature operable phase shifters provided 348° of phase shift at 207 Mc. It had an insertion loss which varied from 3.7 to 2.2 db over a zero- to 4000-volt range of applied dc control voltage.
Keywords :
Ferrites; Ferroelectric materials; Frequency; Impedance matching; Performance analysis; Phase shifters; Surface impedance; Surface waves; Temperature distribution; Voltage control;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IRE Transactions on
Publisher :
ieee
ISSN :
0097-2002
Type :
jour
DOI :
10.1109/TMTT.1962.1125563
Filename :
1125563
Link To Document :
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