Bandpass filter using discriminating coupling for extended out-of-band suppression

Yuan Chun Li; Xiu Yin Zhang; Quan Xue

doi:10.1109/LMWC.2010.2049425

Bandpass filter using discriminating coupling for extended out-of-band suppression

Yuan Chun Li, Xiu Yin Zhang, Quan Xue

State Key Laboratory of Terahertz and Millimeter Waves (City University of Hong Kong)

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

64 Citations (Scopus)

Abstract

This letter presents two bandpass filters with wide out-of-band suppression using multiple different resonators and discriminating coupling. By utilizing half- and quarter-wavelength resonators, the second harmonic can be eliminated. Discriminating coupling is used to obtain zero coupling coefficient at the third harmonic, whereas the coupling in the passband can be tuned to desired values. The proposed filter could obtain 30 dB rejection level in the stopband from 1.2f₀ to 3.8f₀. Meanwhile, the filter is simple to design and easy to fabricate. The theoretical analysis of the proposed filter is given and two demonstration filters are fabricated and measured. The simulated and measured results are presented and good agreements are observed, which confirm the proposed method. © 2010 IEEE.

Original language	English
Article number	5481980
Pages (from-to)	369-371
Journal	IEEE Microwave and Wireless Components Letters
Volume	20
Issue number	7
DOIs	https://doi.org/10.1109/LMWC.2010.2049425
Publication status	Published - Jul 2010

Research Keywords

Bandpass filter(BPF)
discriminating coupling
multiple different resonators
out-of-band suppression

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title = "Bandpass filter using discriminating coupling for extended out-of-band suppression",

abstract = "This letter presents two bandpass filters with wide out-of-band suppression using multiple different resonators and discriminating coupling. By utilizing half- and quarter-wavelength resonators, the second harmonic can be eliminated. Discriminating coupling is used to obtain zero coupling coefficient at the third harmonic, whereas the coupling in the passband can be tuned to desired values. The proposed filter could obtain 30 dB rejection level in the stopband from 1.2f0 to 3.8f0. Meanwhile, the filter is simple to design and easy to fabricate. The theoretical analysis of the proposed filter is given and two demonstration filters are fabricated and measured. The simulated and measured results are presented and good agreements are observed, which confirm the proposed method. {\textcopyright} 2010 IEEE.",

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TY - JOUR

T1 - Bandpass filter using discriminating coupling for extended out-of-band suppression

AU - Li, Yuan Chun

AU - Zhang, Xiu Yin

AU - Xue, Quan

PY - 2010/7

Y1 - 2010/7

N2 - This letter presents two bandpass filters with wide out-of-band suppression using multiple different resonators and discriminating coupling. By utilizing half- and quarter-wavelength resonators, the second harmonic can be eliminated. Discriminating coupling is used to obtain zero coupling coefficient at the third harmonic, whereas the coupling in the passband can be tuned to desired values. The proposed filter could obtain 30 dB rejection level in the stopband from 1.2f0 to 3.8f0. Meanwhile, the filter is simple to design and easy to fabricate. The theoretical analysis of the proposed filter is given and two demonstration filters are fabricated and measured. The simulated and measured results are presented and good agreements are observed, which confirm the proposed method. © 2010 IEEE.

AB - This letter presents two bandpass filters with wide out-of-band suppression using multiple different resonators and discriminating coupling. By utilizing half- and quarter-wavelength resonators, the second harmonic can be eliminated. Discriminating coupling is used to obtain zero coupling coefficient at the third harmonic, whereas the coupling in the passband can be tuned to desired values. The proposed filter could obtain 30 dB rejection level in the stopband from 1.2f0 to 3.8f0. Meanwhile, the filter is simple to design and easy to fabricate. The theoretical analysis of the proposed filter is given and two demonstration filters are fabricated and measured. The simulated and measured results are presented and good agreements are observed, which confirm the proposed method. © 2010 IEEE.

KW - Bandpass filter(BPF)

KW - discriminating coupling

KW - multiple different resonators

KW - out-of-band suppression

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U2 - 10.1109/LMWC.2010.2049425

DO - 10.1109/LMWC.2010.2049425

M3 - RGC 21 - Publication in refereed journal

SN - 1531-1309

VL - 20

SP - 369

EP - 371

JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

IS - 7

M1 - 5481980

ER -

Bandpass filter using discriminating coupling for extended out-of-band suppression

Abstract

Research Keywords

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