DocumentCode :
2798693
Title :
Broadband electronically-tuned microwave filters
Author :
Kotzebue, K.L.
Author_Institution :
Watkins-Johnson Company, Palo Alto, CA
Volume :
4
fYear :
1960
fDate :
22129
Firstpage :
21
Lastpage :
27
Abstract :
It has been suggested that single crystals of yttrium iron garnet (YIG) can be used in the construction of low-loss microwave filters which can be tuned by means of an applied dc magnetic field. This paper will discuss practical broadband circuits in coaxial line and waveguide for both single-tuned and multiple-tuned band-pass and band-reject filters using such YIG crystals. One version of a band-pass filter has operated with electronic tuning from 2000 mc to 6500 mc. The insertion loss was 3 db at 2000 mc, 1 db at 4000 mc, and 0.7 db at 6500 mc, with bandwidths ranging from 18 mc to 40 mc. A packaged version of this filter will be described which utilizes a combination of permanent magnets and solenoids for tuning. The complete filter weighs less than 2-1/2 lb. and can be tuned \\pm 1000 mc from 3000 mc with a power consumption of 5 watts.
Keywords :
Band pass filters; Circuits; Crystals; Garnets; Iron; Magnetic fields; Magnetic separation; Microwave filters; Tuning; Yttrium;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
WESCON/60 Conference Record
Type :
conf
DOI :
10.1109/WESCON.1960.1150484
Filename :
1150484
Link To Document :
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