a study on millimetre-wave tunable bandpass filter based on polymer cap deflection研究毫米波可调谐带通滤波器基于聚合物帽偏转.pdfVIP
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a study on millimetre-wave tunable bandpass filter based on polymer cap deflection研究毫米波可调谐带通滤波器基于聚合物帽偏转
Micromachines 2012, 3, 28-35; doi:10.3390/mi3010028
OPEN ACCESS
micromachines
ISSN 2072-666X
/journal/micromachines
Article
A Study on Millimetre-Wave Tunable Bandpass Filter
Based on Polymer Cap Deflection
Seonho Seok *, Janggil Kim, Nathalie Rolland and Paul-Alain Rolland
IEMN CNRS 8520/Cité Scientifique-Avenue Poincare BP 60069, 59652 Villeneuve d’Ascq Cedex,
France; E-Mails: janggil.kim@iemn.univ-lille1.fr (J.K.); nathalie.rolland@iemn.univ-lille1.fr (N.R.);
paul-alain.rolland@iemn.univ-lille1.fr (P.R.)
* Author to whom correspondence should be addressed; E-Mail: seonho.seok@iemn.univ-lille1.fr;
Tel.: +33-3-2019-7921; Fax: +33-3-2019-7896.
Received: 29 November 2011; in revised form: 28 December 2011 / Accepted: 29 December 2011/
Published: 6 January 2012
Abstract: This paper presents a new tuning mechanism for millimetre-wave BPF based on
deflection of the BCB membrane of BCB packaging cap. A 3-pole parallel-coupled
microstrip filter operating at 60 GHz is first implemented on 30 µm-thick BCB polymer
substrate and then BCB-capped through our new anti-adhesion layer assisted wafer-level
transfer technique. Gold electrodes are fabricated on top of the BCB cap for DC actuation.
The implemented BCB capped BPF showed the tuning range of 1.49 GHz from 63.36 GHz
to 64.85 GHz with the associated insertion losses of −9.7 dB and −9.4 dB and the return
losses better than −11 dB over the tuning range.
Keywords: BCB polymer; filter; tuning; millimeter-wave
1. Introduction
For millimeter wave circuits, MEMS technology is attracting a
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