A CPW hybrid coupler with an enhanced coupling micro structure

Yusuke Kitsukawa; Masatake Hangai; Sang Seok Lee; Tamotsu Nishino; Yukihisa Yoshida; Moriyasu Miyazaki

doi:10.1109/APMC.2006.4429537

A CPW hybrid coupler with an enhanced coupling micro structure

Yusuke Kitsukawa^*, Masatake Hangai, Sang Seok Lee, Tamotsu Nishino, Yukihisa Yoshida, Moriyasu Miyazaki

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

A new micromachined coplanar waveguide (CPW) 3-dB hybrid coupler has been demonstrated. A micromachined enhanced coupling structure at the middle of two coupled transmission lines is employed to obtain high directivity. The coupling structure is composed of alternately overlapping plated conductors employing micromachined air-gap structures. This structure relaxes the tolerance of the gap between the coupled transmission lines, and mitigates production error. Moreover, this coupling structure enhances the coupler directivity by equalizing phase velocities of both evenand odd modes. We fabricate the CPW hybrid coupler with the enhanced coupling structure on a silicon substrate to verify the performance. The results showed the return loss of better than 28dB, the isolation of more than 25dB over 11 to 15 GHz.

Original language	English
Title of host publication	2006 Asia-Pacific Microwave Conference Proceedings, APMC
Pages	807-810
Number of pages	4
DOIs	https://doi.org/10.1109/APMC.2006.4429537
Publication status	Published - 2006
Externally published	Yes
Event	2006 Asia-Pacific Microwave Conference, APMC - Yokohama, Japan Duration: 2006 Dec 12 → 2006 Dec 15

Publication series

Name	Asia-Pacific Microwave Conference Proceedings, APMC
Volume	2

Other

Other	2006 Asia-Pacific Microwave Conference, APMC
Country/Territory	Japan
City	Yokohama
Period	06/12/12 → 06/12/15

Keywords

Air-gap
CPW
Directional coupler
MEMS

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1109/APMC.2006.4429537

Cite this

Kitsukawa, Y, Hangai, M, Lee, SS, Nishino, T, Yoshida, Y & Miyazaki, M 2006, A CPW hybrid coupler with an enhanced coupling micro structure. in 2006 Asia-Pacific Microwave Conference Proceedings, APMC., 4429537, Asia-Pacific Microwave Conference Proceedings, APMC, vol. 2, pp. 807-810, 2006 Asia-Pacific Microwave Conference, APMC, Yokohama, Japan, 06/12/12. https://doi.org/10.1109/APMC.2006.4429537

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title = "A CPW hybrid coupler with an enhanced coupling micro structure",

abstract = "A new micromachined coplanar waveguide (CPW) 3-dB hybrid coupler has been demonstrated. A micromachined enhanced coupling structure at the middle of two coupled transmission lines is employed to obtain high directivity. The coupling structure is composed of alternately overlapping plated conductors employing micromachined air-gap structures. This structure relaxes the tolerance of the gap between the coupled transmission lines, and mitigates production error. Moreover, this coupling structure enhances the coupler directivity by equalizing phase velocities of both evenand odd modes. We fabricate the CPW hybrid coupler with the enhanced coupling structure on a silicon substrate to verify the performance. The results showed the return loss of better than 28dB, the isolation of more than 25dB over 11 to 15 GHz.",

keywords = "Air-gap, CPW, Directional coupler, MEMS",

author = "Yusuke Kitsukawa and Masatake Hangai and Lee, {Sang Seok} and Tamotsu Nishino and Yukihisa Yoshida and Moriyasu Miyazaki",

year = "2006",

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T1 - A CPW hybrid coupler with an enhanced coupling micro structure

AU - Kitsukawa, Yusuke

AU - Hangai, Masatake

AU - Lee, Sang Seok

AU - Nishino, Tamotsu

AU - Yoshida, Yukihisa

AU - Miyazaki, Moriyasu

PY - 2006

Y1 - 2006

N2 - A new micromachined coplanar waveguide (CPW) 3-dB hybrid coupler has been demonstrated. A micromachined enhanced coupling structure at the middle of two coupled transmission lines is employed to obtain high directivity. The coupling structure is composed of alternately overlapping plated conductors employing micromachined air-gap structures. This structure relaxes the tolerance of the gap between the coupled transmission lines, and mitigates production error. Moreover, this coupling structure enhances the coupler directivity by equalizing phase velocities of both evenand odd modes. We fabricate the CPW hybrid coupler with the enhanced coupling structure on a silicon substrate to verify the performance. The results showed the return loss of better than 28dB, the isolation of more than 25dB over 11 to 15 GHz.

AB - A new micromachined coplanar waveguide (CPW) 3-dB hybrid coupler has been demonstrated. A micromachined enhanced coupling structure at the middle of two coupled transmission lines is employed to obtain high directivity. The coupling structure is composed of alternately overlapping plated conductors employing micromachined air-gap structures. This structure relaxes the tolerance of the gap between the coupled transmission lines, and mitigates production error. Moreover, this coupling structure enhances the coupler directivity by equalizing phase velocities of both evenand odd modes. We fabricate the CPW hybrid coupler with the enhanced coupling structure on a silicon substrate to verify the performance. The results showed the return loss of better than 28dB, the isolation of more than 25dB over 11 to 15 GHz.

KW - Air-gap

KW - CPW

KW - Directional coupler

KW - MEMS

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BT - 2006 Asia-Pacific Microwave Conference Proceedings, APMC

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Y2 - 12 December 2006 through 15 December 2006

ER -

A CPW hybrid coupler with an enhanced coupling micro structure

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Keywords

ASJC Scopus subject areas

Access to Document

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