Edge-guided mode isolators for 1.7 GHz band
Abstract
A 1.7 GHz broadband isolator on a ferrite substrate has been designed using the principle of edge-guided mode propagation. For broadbanding, a locally intense magnetic field was applied to the edge of a wide microstrip line to increase the frequency of higher mode occurrence. For miniaturization, the microstrip was bent and the isolator was shortened. The following performance test results were noted: the insertion loss was less than 1.2 dB; the isolation was greater than 30 dB; and the VSWR was less than 1.4 in the frequency range 1.45-1.95 GHz. After broadbanding, the insertion loss was less than 2 dB and the isolation was greater than 20 dB in the range 1.4-3 GHz.
- Publication:
-
Fujitsu Scientific Technical Journal
- Pub Date:
- June 1976
- Bibcode:
- 1976FSTJ...12..107T
- Keywords:
-
- Broadband;
- Ferrites;
- Isolators;
- Microstrip Transmission Lines;
- Microwave Equipment;
- Propagation Modes;
- Decoupling;
- Dielectric Permeability;
- Folding Structures;
- Magnetic Permeability;
- Magnetization;
- Miniaturization;
- Wave Equations;
- Wave Propagation;
- Electronics and Electrical Engineering