LTCC bandpass filter with wide stopband based on electric and magnetic coupling cancellation

Xin Dai; Xiu Yin Zhang; Hsuan Ling Kao; Bai Hong Wei; Jin Xu Xu; Xiaohuan Li

doi:10.1109/TCPMT.2014.2346240

LTCC bandpass filter with wide stopband based on electric and magnetic coupling cancellation

Xin Dai^*, Xiu Yin Zhang, Hsuan Ling Kao, Bai Hong Wei, Jin Xu Xu, Xiaohuan Li

^*Corresponding author for this work

Department of Electronic Engineering

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

38 Scopus citations

Abstract

This paper presents a new method of using electric and magnetic coupling cancellation to extend the stopband of bandpass filters (BPFs). The mechanism is theoretically analyzed based on the lumped-element equivalent circuit. Due to the cancellation of electric and magnetic coupling between two resonators, three transmission zeros (TZs) can be generated and controlled by manipulating the coupling strength. Using the proposed method together with source-load coupling, a low temperature cofire ceramic (LTCC) BPF is designed with four TZs at the passband edges and within the stopband, resulting in high skirt selectivity and harmonic suppression. Due to the LTCC multilayer structure, the filter size is 0.054 λ_g∗ 0.045 λ_g0.013λ_g, or (2.48 mm × 2.02 mm × 0.6) mm. The theoretical, simulated and measured results of the LTCC BPF are presented to validate the proposed design.

Original language	English
Article number	6882782
Pages (from-to)	1705-1713
Number of pages	9
Journal	IEEE Transactions on Components, Packaging and Manufacturing Technology
Volume	4
Issue number	10
DOIs	https://doi.org/10.1109/TCPMT.2014.2346240
State	Published - 01 10 2014

Bibliographical note

Publisher Copyright:
© 2011-2012 IEEE.

Keywords

Bandpass filter (BPF)
electric and magnetic (EM) coupling cancellation
low temperature cofired ceramic (LTCC)
transmission zero (TZ)
wide stopband

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10.1109/TCPMT.2014.2346240

Cite this

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title = "LTCC bandpass filter with wide stopband based on electric and magnetic coupling cancellation",

abstract = "This paper presents a new method of using electric and magnetic coupling cancellation to extend the stopband of bandpass filters (BPFs). The mechanism is theoretically analyzed based on the lumped-element equivalent circuit. Due to the cancellation of electric and magnetic coupling between two resonators, three transmission zeros (TZs) can be generated and controlled by manipulating the coupling strength. Using the proposed method together with source-load coupling, a low temperature cofire ceramic (LTCC) BPF is designed with four TZs at the passband edges and within the stopband, resulting in high skirt selectivity and harmonic suppression. Due to the LTCC multilayer structure, the filter size is 0.054 λg∗ 0.045 λg0.013λg, or (2.48 mm × 2.02 mm × 0.6) mm. The theoretical, simulated and measured results of the LTCC BPF are presented to validate the proposed design.",

keywords = "Bandpass filter (BPF), electric and magnetic (EM) coupling cancellation, low temperature cofired ceramic (LTCC), transmission zero (TZ), wide stopband",

author = "Xin Dai and Zhang, \{Xiu Yin\} and Kao, \{Hsuan Ling\} and Wei, \{Bai Hong\} and Xu, \{Jin Xu\} and Xiaohuan Li",

note = "Publisher Copyright: {\textcopyright} 2011-2012 IEEE.",

year = "2014",

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doi = "10.1109/TCPMT.2014.2346240",

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T1 - LTCC bandpass filter with wide stopband based on electric and magnetic coupling cancellation

AU - Dai, Xin

AU - Zhang, Xiu Yin

AU - Kao, Hsuan Ling

AU - Wei, Bai Hong

AU - Xu, Jin Xu

AU - Li, Xiaohuan

PY - 2014/10/1

Y1 - 2014/10/1

N2 - This paper presents a new method of using electric and magnetic coupling cancellation to extend the stopband of bandpass filters (BPFs). The mechanism is theoretically analyzed based on the lumped-element equivalent circuit. Due to the cancellation of electric and magnetic coupling between two resonators, three transmission zeros (TZs) can be generated and controlled by manipulating the coupling strength. Using the proposed method together with source-load coupling, a low temperature cofire ceramic (LTCC) BPF is designed with four TZs at the passband edges and within the stopband, resulting in high skirt selectivity and harmonic suppression. Due to the LTCC multilayer structure, the filter size is 0.054 λg∗ 0.045 λg0.013λg, or (2.48 mm × 2.02 mm × 0.6) mm. The theoretical, simulated and measured results of the LTCC BPF are presented to validate the proposed design.

AB - This paper presents a new method of using electric and magnetic coupling cancellation to extend the stopband of bandpass filters (BPFs). The mechanism is theoretically analyzed based on the lumped-element equivalent circuit. Due to the cancellation of electric and magnetic coupling between two resonators, three transmission zeros (TZs) can be generated and controlled by manipulating the coupling strength. Using the proposed method together with source-load coupling, a low temperature cofire ceramic (LTCC) BPF is designed with four TZs at the passband edges and within the stopband, resulting in high skirt selectivity and harmonic suppression. Due to the LTCC multilayer structure, the filter size is 0.054 λg∗ 0.045 λg0.013λg, or (2.48 mm × 2.02 mm × 0.6) mm. The theoretical, simulated and measured results of the LTCC BPF are presented to validate the proposed design.

KW - Bandpass filter (BPF)

KW - electric and magnetic (EM) coupling cancellation

KW - low temperature cofired ceramic (LTCC)

KW - transmission zero (TZ)

KW - wide stopband

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DO - 10.1109/TCPMT.2014.2346240

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AN - SCOPUS:85027925228

SN - 2156-3950

VL - 4

SP - 1705

EP - 1713

JO - IEEE Transactions on Components, Packaging and Manufacturing Technology

JF - IEEE Transactions on Components, Packaging and Manufacturing Technology

IS - 10

M1 - 6882782

ER -

LTCC bandpass filter with wide stopband based on electric and magnetic coupling cancellation

Abstract

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Keywords

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