Canonical and longitudinal dual-mode dielectric resonator filters without iris
Abstract
Two bandpass filter realizations using dual-mode dielectric resonators in simple tubular enclosures are described. The configurations do not require an iris to achieve coupling among the resonators. The filters have lower midband insertion loss than comparable realizations with iris, because the conduction currents on the iris are eliminated. Measured results on two four-pole elliptic-function experimental filters realized with the proposed structures agreed closely with theory.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- December 1987
- DOI:
- 10.1109/TMTT.1987.1133827
- Bibcode:
- 1987ITMTT..35.1130Z
- Keywords:
-
- Bandpass Filters;
- Canonical Forms;
- Circular Waveguides;
- Dielectrics;
- Insertion Loss;
- Multimode Resonators;
- Electric Fields;
- Irises (Mechanical Apertures);
- Parameter Identification;
- Transfer Functions;
- Electronics and Electrical Engineering