By Topic

Optimization of a lumped element circulator based on eigenvalue evaluation and structural improvement

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Miura, T. ; Adv. Products Dev. Center, TDK Corp., Chiba, China ; Kobayashi, M. ; Konishi, Y.

An optimization technique for a lumped element circulator has been established from the point of view of theoretical characteristic design and structural improvement. A theoretical design based on the evaluation of the eigenvalues of an inductance matrix made it possible to optimize the isolation bandwidth characteristic of a structurally improved circulator. Structural optimization was achieved by the application of multilayer ceramic technology and novel conductor formation methods to increase the isolation bandwidth of the circulator and to decrease its insertion loss. The 20 dB isolation bandwidth of 5.8% obtained by this circulator exceeded the characteristics of a conventional circulator of the same size by 29%, while an insertion loss of 0.35 dB was maintained. In view of the present status of ceramic technology, it is believed that this circulator has been ultimately close to the preferred structure for lumped element circulators

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:44 ,  Issue: 12 )