Novel microstrip fed mechanically tunable combline cavity filter

Date
2013
Authors
Kurudere, S.
Erturk, V. B.
Advisor
Instructor
Source Title
IEEE Microwave and Wireless Components Letters
Print ISSN
1531-1309
Electronic ISSN
Publisher
IEEE
Volume
23
Issue
11
Pages
578 - 580
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

A novel configuration for mechanically tunable combline bandpass filters is proposed, where the classical resonating rod-tuning screw combination is replaced with a simple printed circuit-tuning screw combination. Moreover, because a printed circuit structure that uses metal vias forms the bottom part of the cavity, the coaxial type feeding and the coaxial to cavity matching of classical combline filters are also replaced with a microstrip feeding. Consequently, the proposed configuration provides smaller size, less weight, integration with other printed circuits and significant simplification in the fabrication process. A prototype filter is designed and fabricated for verification. The measured results are in good agreement with the simulation, and the filter exhibits very good harmonic suppression.

Course
Other identifiers
Book Title
Keywords
Harmonic suppression, tunable combline filters (TCFs), Cavity filters, Circuit structures, Combline bandpass filter, Combline filters, Fabrication process, Harmonic suppression, Measured results, Prototype filters, Bandpass filters, Harmonic analysis, Screws, Printed circuits
Citation
Published Version (Please cite this version)