LTCC wideband filter design with selectivity enhancement

Kengyi Huang; Tsenchieh Chiu

doi:10.1109/LMWC.2009.2022131

LTCC wideband filter design with selectivity enhancement

Kengyi Huang, Tsenchieh Chiu

Department of Electrical Engineering

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

14 Scopus citations

Abstract

A new design scheme for the wideband filters with the low temperature co-fired ceramic (LTCC) technology is proposed in this letter. Based on the traditional second-order combline filter, an extra shunt capacitor is added in the middle of the coupled line, and a new transmission zero is thus obtained. The proposed design not only possesses excellent selectivity at both sides of the passband, the fractional bandwidth can also be as wide as 86%. To validate the design scheme, the proposed technique is applied to the third-order combline filter and realized by using the LTCC technology. The wide-band filter with passband of 3.15.1 GHz is obtained. With four transmission-zeros, the selectivity and out-band rejection of the third-order filter is further improved from those of the second-order designs.

Original language	English
Article number	5109494
Pages (from-to)	452-454
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	19
Issue number	7
DOIs	https://doi.org/10.1109/LMWC.2009.2022131
State	Published - Jul 2009

Keywords

Coupled line
Filter
Low-temperature co-fired ceramic (LTCC)

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10.1109/LMWC.2009.2022131

Cite this

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title = "LTCC wideband filter design with selectivity enhancement",

abstract = "A new design scheme for the wideband filters with the low temperature co-fired ceramic (LTCC) technology is proposed in this letter. Based on the traditional second-order combline filter, an extra shunt capacitor is added in the middle of the coupled line, and a new transmission zero is thus obtained. The proposed design not only possesses excellent selectivity at both sides of the passband, the fractional bandwidth can also be as wide as 86%. To validate the design scheme, the proposed technique is applied to the third-order combline filter and realized by using the LTCC technology. The wide-band filter with passband of 3.15.1 GHz is obtained. With four transmission-zeros, the selectivity and out-band rejection of the third-order filter is further improved from those of the second-order designs.",

keywords = "Coupled line, Filter, Low-temperature co-fired ceramic (LTCC)",

author = "Kengyi Huang and Tsenchieh Chiu",

note = "Funding Information: Manuscript received January 04, 2009; revised March 13, 2009. First published June 23, 2009; current version published July 09, 2009. This work was supported by the National Science Council of Taiwan under Grant NSC 97-2221-E-008-036, and Walsin Technology Corporation for the assistance to LTCC filter fabrication.",

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AU - Huang, Kengyi

AU - Chiu, Tsenchieh

N1 - Funding Information: Manuscript received January 04, 2009; revised March 13, 2009. First published June 23, 2009; current version published July 09, 2009. This work was supported by the National Science Council of Taiwan under Grant NSC 97-2221-E-008-036, and Walsin Technology Corporation for the assistance to LTCC filter fabrication.

PY - 2009/7

Y1 - 2009/7

N2 - A new design scheme for the wideband filters with the low temperature co-fired ceramic (LTCC) technology is proposed in this letter. Based on the traditional second-order combline filter, an extra shunt capacitor is added in the middle of the coupled line, and a new transmission zero is thus obtained. The proposed design not only possesses excellent selectivity at both sides of the passband, the fractional bandwidth can also be as wide as 86%. To validate the design scheme, the proposed technique is applied to the third-order combline filter and realized by using the LTCC technology. The wide-band filter with passband of 3.15.1 GHz is obtained. With four transmission-zeros, the selectivity and out-band rejection of the third-order filter is further improved from those of the second-order designs.

AB - A new design scheme for the wideband filters with the low temperature co-fired ceramic (LTCC) technology is proposed in this letter. Based on the traditional second-order combline filter, an extra shunt capacitor is added in the middle of the coupled line, and a new transmission zero is thus obtained. The proposed design not only possesses excellent selectivity at both sides of the passband, the fractional bandwidth can also be as wide as 86%. To validate the design scheme, the proposed technique is applied to the third-order combline filter and realized by using the LTCC technology. The wide-band filter with passband of 3.15.1 GHz is obtained. With four transmission-zeros, the selectivity and out-band rejection of the third-order filter is further improved from those of the second-order designs.

KW - Coupled line

KW - Filter

KW - Low-temperature co-fired ceramic (LTCC)

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EP - 454

JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

IS - 7

M1 - 5109494

ER -

LTCC wideband filter design with selectivity enhancement

Abstract

Keywords

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