Nonreciprocal delay line for use in S band tubes
Abstract
In order to make ferrites available for broad-band resonance isolator applications in high-power microwave tubes, seven lithium ferrites and four nonlithium spinel ferrites were tested for resoance-loss behavior near an S band (2.0-4.0-GHz) linear helix. The observed behavior, i.e., the dependence of the absorption on the dimensions of the ferrites, can be attributed to excitation of surface magnetostatic modes. Using the results of the Damon-Eshbach theory for surface magnetostatic modes in semi-infinite slabs, resoance frequency and surface-wave attenuation factors were numerically calculated as a function of the propagation coefficient and the ratio of magnetization to internal field.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- October 1975
- DOI:
- 10.1109/TMTT.1975.1128688
- Bibcode:
- 1975ITMTT..23..813T
- Keywords:
-
- Delay Lines;
- Ferrites;
- Microwave Tubes;
- Resonant Frequencies;
- Transmission Loss;
- Broadband;
- Frequency Response;
- Lithium Compounds;
- Magnetization;
- Magnetostatic Fields;
- Microwave Attenuation;
- Microwave Resonance;
- Power Conditioning;
- Propagation Modes;
- Surface Waves;
- Electronics and Electrical Engineering