Design and performance of J-band /12.4-18 GHz/ ferrite microstrip circulators
Abstract
A computer program CIRFER is described that facilitates the design of circulators on all-ferrite substrates. With the use of the design approach, J-band circulators have been fabricated using thin-film techniques on ferrite substrates of different saturation-magnetization values. Good agreement was obtained between theoretical and experimental resonant-disk diameters at the center frequency of operation of the circulator. The circulators gave isolations of 20-40 dB in mid J-band, with a corresponding loss per pass of the order of 0.5 dB. The microwave performance is sufficiently encouraging to suggest that in certain applications an all-ferrite approach could be considered, which would simplify the circulator design.
- Publication:
-
Institution of Electrical Engineers Proceedings
- Pub Date:
- August 1978
- Bibcode:
- 1978IEEP..125..724O
- Keywords:
-
- Circulators (Phase Shift Circuits);
- Computer Aided Design;
- Integrated Circuits;
- Microstrip Devices;
- Microwave Circuits;
- Performance Prediction;
- Computer Programs;
- Ferrites;
- Network Synthesis;
- Substrates;
- Superhigh Frequencies;
- Thin Films;
- Electronics and Electrical Engineering