A new compact microstrip stacked-SIR bandpass filter with transmission zeros

Eric Shih; Jen Tsai Kuo

A new compact microstrip stacked-SIR bandpass filter with transmission zeros

Eric Shih^*, Jen Tsai Kuo

^*Corresponding author for this work

National Yang Ming Chiao Tung University

Research output: Contribution to journal › Conference article › peer-review

26 Scopus citations

Abstract

This paper presents a new class of bandpass filters based on a stacked-SIR (stepped Impedance resonators) configuration. By stacking multi-coupled SIR's, the longitudinal dimension of the resulting filter is not Increased despite the increase of the filter order, so that the area of the whole filter is very compact. The use of SIR's assures that the filters have a wide upper stopband. In addition, with proper tapped input and output couplings, this new bandpass filter structure is capable of generating at least two transmission zeros. Of filters of orders 2 and 4, simulated responses show three transmission zeros in the stopband. Two third-order filters with transmission zeros purposely located at twice the center passband frequency (2f₀) are fabricated and measured to demonstrate the design.

Original language	English
Pages (from-to)	1077-1080
Number of pages	4
Journal	IEEE MTT-S International Microwave Symposium Digest
Volume	2
State	Published - 2003
Externally published	Yes
Event	2003 IEEE MTT-S International Microwave Symposium Digest - Philadelphia, PA, United States Duration: 08 06 2003 → 13 06 2003

Cite this

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title = "A new compact microstrip stacked-SIR bandpass filter with transmission zeros",

abstract = "This paper presents a new class of bandpass filters based on a stacked-SIR (stepped Impedance resonators) configuration. By stacking multi-coupled SIR's, the longitudinal dimension of the resulting filter is not Increased despite the increase of the filter order, so that the area of the whole filter is very compact. The use of SIR's assures that the filters have a wide upper stopband. In addition, with proper tapped input and output couplings, this new bandpass filter structure is capable of generating at least two transmission zeros. Of filters of orders 2 and 4, simulated responses show three transmission zeros in the stopband. Two third-order filters with transmission zeros purposely located at twice the center passband frequency (2f0) are fabricated and measured to demonstrate the design.",

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AB - This paper presents a new class of bandpass filters based on a stacked-SIR (stepped Impedance resonators) configuration. By stacking multi-coupled SIR's, the longitudinal dimension of the resulting filter is not Increased despite the increase of the filter order, so that the area of the whole filter is very compact. The use of SIR's assures that the filters have a wide upper stopband. In addition, with proper tapped input and output couplings, this new bandpass filter structure is capable of generating at least two transmission zeros. Of filters of orders 2 and 4, simulated responses show three transmission zeros in the stopband. Two third-order filters with transmission zeros purposely located at twice the center passband frequency (2f0) are fabricated and measured to demonstrate the design.

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JF - IEEE MTT-S International Microwave Symposium Digest

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Y2 - 8 June 2003 through 13 June 2003

ER -

A new compact microstrip stacked-SIR bandpass filter with transmission zeros

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