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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 7, July 2000

Table of Contents for this issue

Complete paper in PDF format

Design of Highly Selective Microstrip Bandpass Filters with a Single Pair of Attenuation Poles at Finite Frequencies

Jia-Sheng Hong, Member, IEEE and Michael J. Lancaster Member, IEEE

Page 1098.

Abstract:

This paper presents the design of a class of highly selective microstrip bandpass filters that consist of microstrip open-loop resonators that exhibit a single pair of attenuation poles at finite frequencies. A practical design technique for this class of filters is introduced, including tables and formulas for accurate and fast filter synthesis. Two design examples of a six-pole filter with a fractional bandwidth of 7.331% at 955 MHz and an eight-pole filter with a fractional bandwidth of 10.359% at 985 MHz are described. Theoretical and experimental results are presented. The compact size and the excellent performance of this class of filters have been demonstrated.

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