Hairpin-Line and Hybrid Hairpin-Line/Half-Wave Parallel-Coupled-Line Filters

1 November 1972

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques

Vol. 20 (11) , 719-728
https://doi.org/10.1109/tmtt.1972.1127860

Abstract

A new class of microwave filters, hairpin-line and hybrid hairpin-line/half-wave parallel-coupled-line filters, is reported. This class of filters is particularly well suited for microstrip and TEM printed-circuit realizations because grounding of the filter resonators is generally not required. Hairpin-line filters have been divided into two types. The first (Type A) is characterized by having its input and output lines open-circuited at their ends. The Type A filter has been found to yield practical impedance levels for narrow to approximately 25-percent bandwidths. The second (Type B) is characterized by having its input and output lines short-circuited at their ends. However, because of space limitations, details of the Type B filter are not presented in this paper. Theoretical background and design equations for Type A bandpass filters are presented. Experimental data for several stripline filters of 5- and 20-percent bandwidths are given. Experimental results for two microwave-integrated-circuit (MIC) filters are discussed.

Keywords

This publication has 6 references indexed in Scilit:

New Design Equations for a Class of Microwave Filters (Correspondence)
IEEE Transactions on Microwave Theory and Techniques, 1971
Simplified Analysis of Coupled Transmission-Line Networks
IEEE Transactions on Microwave Theory and Techniques, 1970
A High Directivity Microstrip Coupler Technique
Published by Institute of Electrical and Electronics Engineers (IEEE) ,1970
Theoretical and Practical Applications of Capacitance Matrix Transformations to TEM Network Design
IEEE Transactions on Microwave Theory and Techniques, 1966
Interdigital Band-Pass Filters
IRE Transactions on Microwave Theory and Techniques, 1962
A Study of the Phase and Filter Properties of Arrays of Parallel Conductors between Ground Planes
Proceedings of the IRE, 1962