Design of Modified Z-Shaped and T-Shaped Microstrip Filter Based on Transfer Function Analysis

Gh Karimi; H. Siahkamari; F. Khamin Hamedani; A. Lalbakhsh

doi:10.1007/s11277-015-2328-z

Design of Modified Z-Shaped and T-Shaped Microstrip Filter Based on Transfer Function Analysis

Gh Karimi^*, H. Siahkamari, F. Khamin Hamedani, A. Lalbakhsh

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

A new microstrip lowpass filter with compact size, ultra-wide stopband and sharp cutoff frequency is proposed. To achieve an ultra-wide stopband and sharp cutoff frequency, two Z-shaped resonators are added to the filter. To reduce the circuit size of the filter, cursive transmission line is also introduced. Moreover, exact equation for the most important transmission zeroes are obtained based on LC equivalent circuit and transfer function. A demonstration filter with 3 dB cut-off frequency at 1.89 has been designed, fabricated and measured. The results show a relative stopband bandwidth of 166.3 % (referred to suppression degree of 25 dB), and a high figure of merit of 32,613.

Original language	English
Pages (from-to)	2005-2016
Number of pages	12
Journal	Wireless Personal Communications
Volume	82
Issue number	4
DOIs	https://doi.org/10.1007/s11277-015-2328-z
Publication status	Published - 29 Jun 2015
Externally published	Yes

Keywords

Micriostrip lowpass filter
Transfer function
Transmission zero
Ultra wide stopband

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10.1007/s11277-015-2328-z

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abstract = "A new microstrip lowpass filter with compact size, ultra-wide stopband and sharp cutoff frequency is proposed. To achieve an ultra-wide stopband and sharp cutoff frequency, two Z-shaped resonators are added to the filter. To reduce the circuit size of the filter, cursive transmission line is also introduced. Moreover, exact equation for the most important transmission zeroes are obtained based on LC equivalent circuit and transfer function. A demonstration filter with 3 dB cut-off frequency at 1.89 has been designed, fabricated and measured. The results show a relative stopband bandwidth of 166.3 % (referred to suppression degree of 25 dB), and a high figure of merit of 32,613.",

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AU - Karimi, Gh

AU - Siahkamari, H.

AU - Khamin Hamedani, F.

AU - Lalbakhsh, A.

PY - 2015/6/29

Y1 - 2015/6/29

N2 - A new microstrip lowpass filter with compact size, ultra-wide stopband and sharp cutoff frequency is proposed. To achieve an ultra-wide stopband and sharp cutoff frequency, two Z-shaped resonators are added to the filter. To reduce the circuit size of the filter, cursive transmission line is also introduced. Moreover, exact equation for the most important transmission zeroes are obtained based on LC equivalent circuit and transfer function. A demonstration filter with 3 dB cut-off frequency at 1.89 has been designed, fabricated and measured. The results show a relative stopband bandwidth of 166.3 % (referred to suppression degree of 25 dB), and a high figure of merit of 32,613.

AB - A new microstrip lowpass filter with compact size, ultra-wide stopband and sharp cutoff frequency is proposed. To achieve an ultra-wide stopband and sharp cutoff frequency, two Z-shaped resonators are added to the filter. To reduce the circuit size of the filter, cursive transmission line is also introduced. Moreover, exact equation for the most important transmission zeroes are obtained based on LC equivalent circuit and transfer function. A demonstration filter with 3 dB cut-off frequency at 1.89 has been designed, fabricated and measured. The results show a relative stopband bandwidth of 166.3 % (referred to suppression degree of 25 dB), and a high figure of merit of 32,613.

KW - Micriostrip lowpass filter

KW - Transfer function

KW - Transmission zero

KW - Ultra wide stopband

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DO - 10.1007/s11277-015-2328-z

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SN - 0929-6212

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SP - 2005

EP - 2016

JO - Wireless Personal Communications

JF - Wireless Personal Communications

IS - 4

ER -

Design of Modified Z-Shaped and T-Shaped Microstrip Filter Based on Transfer Function Analysis

Abstract

Keywords

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