Slot line tunable bandpass filter
Abstract
A tunable bandpass filter comprising a pair of slot line resonant cavities formed in a metallic film covering the planar surface of a ferrite substrate is studied. A magnetic biasing field of variable magnitude is generated and applied through the ferrite substrate transversely across the slot line resonant cavities. The magnetic field operates to change the electrical length of the resonant cavities due to the fact that the magnetic permeability of the ferrite material changes with the applied field.
- Publication:
-
Patent Application Department of the Army
- Pub Date:
- August 1985
- Bibcode:
- 1985army.reptU....M
- Keywords:
-
- Bandpass Filters;
- Cavity Resonators;
- Ferrites;
- Magnetic Fields;
- Slots;
- Transmission Lines;
- Tuning;
- Electrical Properties;
- Magnetic Permeability;
- Metal Films;
- Planar Structures;
- Substrates;
- Electronics and Electrical Engineering