An Inline Coaxial Quasi-Elliptic Filter With Controllable Mixed Electric and Magnetic Coupling
- 6 February 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 57 (3), 667-673
- https://doi.org/10.1109/tmtt.2009.2013290
Abstract
Based on the concept of using controllable mixed electric and magnetic coupling to design planar filters in our earlier work, we propose a novel inline coaxial filter, in which the electric and magnetic coupling can be separately controlled. Due to this controllable mixed coupling, the filter can operate with a quasi-elliptic characteristic. By modifying resonator structure and inserting additional coupling components, the filter size is substantially reduced and the coupling becomes more easily controllable, thus being able to produce a highly selective filter with a compact size. In addition, asymmetric response can be easily achieved. For the N-order filter, a maximum of N - 1 finite transmission zeros can be realized.Keywords
This publication has 16 references indexed in Scilit:
- A Compact Open-Loop Filter With Mixed Electric and Magnetic CouplingIEEE Transactions on Microwave Theory and Techniques, 2008
- Modified Adaptive Prototype Inclusive of the External Couplings for the Design of Coaxial FiltersIEEE Transactions on Microwave Theory and Techniques, 2007
- A new adaptive prototype for the design of side-coupled coaxial filters with close correspondence to the physical structureIEEE Transactions on Microwave Theory and Techniques, 2006
- New parallel λ/2-microstrip line filters with transmission zeros at finite frequenciesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Full wave modeling of electric coupling probes in combline resonators and filtersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Full-wave analysis of coupling between combline resonators and its application to combline filters with canonical configurationsIEEE Transactions on Microwave Theory and Techniques, 2001
- Microstrip Filters for RF/Microwave ApplicationsPublished by Wiley ,2001
- Full-wave analysis of coupling between cylindrical combline resonatorsIEEE Transactions on Microwave Theory and Techniques, 1999
- Mixed modes dielectric resonator filtersIEEE Transactions on Microwave Theory and Techniques, 1994
- A Comb-Line Elliptic FilterIEEE Transactions on Microwave Theory and Techniques, 1971