Improved performance step impedance lowpass filter

A. K. Verma; Nainu P. Chaudhari; Ashwani Kumar

doi:10.1016/j.aeue.2013.03.003

Improved performance step impedance lowpass filter

A. K. Verma, Nainu P. Chaudhari, Ashwani Kumar^*

^*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

Performances of the conventional Butterworth step impedance lowpass filters (LPF) are significantly improved by placing transmission zero either closer to the cut-off frequency (f_c) or away from it. It is achieved by using transverse resonance width of the capacitive line sections. We report method of designing transverse resonance type LPF (TR-LPF) for 5 to 11-pole filters. At f_c = 2.5 GHz, we obtained selectivity in the range 113.3-56.66 dB/GHz and 20-60 dB rejection BW in the range 9.61-7.29 GHz. The TR-LPF can suppress the stopband signal by 60 dB up to 5f_c. Insertion loss in passband is within 0.72 dB. Improved performance of TR-LPF can be designed for f _c up to 7.5 GHz.

Original language	English
Pages (from-to)	761-770
Number of pages	10
Journal	AEU - International Journal of Electronics and Communications
Volume	67
Issue number	9
DOIs	https://doi.org/10.1016/j.aeue.2013.03.003
Publication status	Published - Sep 2013
Externally published	Yes

Keywords

Low-pass filter (LPF)
Microstrip
Transmission zero
Transverse resonance (TR)

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10.1016/j.aeue.2013.03.003

Cite this

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title = "Improved performance step impedance lowpass filter",

abstract = "Performances of the conventional Butterworth step impedance lowpass filters (LPF) are significantly improved by placing transmission zero either closer to the cut-off frequency (fc) or away from it. It is achieved by using transverse resonance width of the capacitive line sections. We report method of designing transverse resonance type LPF (TR-LPF) for 5 to 11-pole filters. At fc = 2.5 GHz, we obtained selectivity in the range 113.3-56.66 dB/GHz and 20-60 dB rejection BW in the range 9.61-7.29 GHz. The TR-LPF can suppress the stopband signal by 60 dB up to 5fc. Insertion loss in passband is within 0.72 dB. Improved performance of TR-LPF can be designed for f c up to 7.5 GHz.",

keywords = "Low-pass filter (LPF), Microstrip, Transmission zero, Transverse resonance (TR)",

author = "Verma, {A. K.} and Chaudhari, {Nainu P.} and Ashwani Kumar",

year = "2013",

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language = "English",

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journal = "AEU - International Journal of Electronics and Communications",

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T1 - Improved performance step impedance lowpass filter

AU - Verma, A. K.

AU - Chaudhari, Nainu P.

AU - Kumar, Ashwani

PY - 2013/9

Y1 - 2013/9

N2 - Performances of the conventional Butterworth step impedance lowpass filters (LPF) are significantly improved by placing transmission zero either closer to the cut-off frequency (fc) or away from it. It is achieved by using transverse resonance width of the capacitive line sections. We report method of designing transverse resonance type LPF (TR-LPF) for 5 to 11-pole filters. At fc = 2.5 GHz, we obtained selectivity in the range 113.3-56.66 dB/GHz and 20-60 dB rejection BW in the range 9.61-7.29 GHz. The TR-LPF can suppress the stopband signal by 60 dB up to 5fc. Insertion loss in passband is within 0.72 dB. Improved performance of TR-LPF can be designed for f c up to 7.5 GHz.

AB - Performances of the conventional Butterworth step impedance lowpass filters (LPF) are significantly improved by placing transmission zero either closer to the cut-off frequency (fc) or away from it. It is achieved by using transverse resonance width of the capacitive line sections. We report method of designing transverse resonance type LPF (TR-LPF) for 5 to 11-pole filters. At fc = 2.5 GHz, we obtained selectivity in the range 113.3-56.66 dB/GHz and 20-60 dB rejection BW in the range 9.61-7.29 GHz. The TR-LPF can suppress the stopband signal by 60 dB up to 5fc. Insertion loss in passband is within 0.72 dB. Improved performance of TR-LPF can be designed for f c up to 7.5 GHz.

KW - Low-pass filter (LPF)

KW - Microstrip

KW - Transmission zero

KW - Transverse resonance (TR)

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DO - 10.1016/j.aeue.2013.03.003

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JO - AEU - International Journal of Electronics and Communications

JF - AEU - International Journal of Electronics and Communications

SN - 1434-8411

IS - 9

ER -

Improved performance step impedance lowpass filter

Abstract

Keywords

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