This paper appears in: Microwave Theory and Techniques, IRE Transactions on
Publication Date: October 1956
Volume: 4,
Issue: 4
On page(s): 210-217
ISSN: 0097-2002
Digital Object Identifier: 10.1109/TMTT.1956.1125064
Current Version Published: 2003-01-06
Abstract
The discovery of a simple, low loss way to hold Faraday rotation constant over a broad-band (coupled with the development of wide-band, high return loss, circular-to-rectangular waveguide transformers, and polarization couplers) has made it possible to design and build a high quality circulator for use in the 10.7 kmc to 11.7 kmc band. The essential characteristics of the described unit include a more than 30-db return loss at each terminal, an isolation of 30 db or greater between "isolated" terminals, and a 0.35-db insertion loss between transmission terminals.
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