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Performance of stripline-type ferrite coupled line circulators

✍ Scribed by C. K. Queck; L. E. Davis; K. Xie; K. Newsome; B. Climer; N. E. Priestley

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
151 KB
Volume
13
Category
Article
ISSN
1096-4290

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✦ Synopsis

The normal-mode approach is used to design stripline-type ferrite coupled line circulators with alumina as a substrate and ferrite as a superstrate. The measurements that are taken clearly demonstrate the nonreciprocal behavior of these devices, with an average insertion loss of 5 dB and an isolation of ؊12 dB. It is found that the three-port circulator has a broader bandwidth (9 -14 GHz) than that of the four-port circulator (9 -12 GHz), and the hybrid coupler has been identified as the bottleneck in the latter.

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