Miniature distributed filters for software re-configurable radio applications

JR Macleod, T Nesimoglu, MA Beach, PA Warr

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Variable preselection filters will be an important component of any software re-configurable radio design. To be of practical use, such a filter should occupy a minimum of board area in any transceiver layout. Slow-wave filters are introduced and their essential electrical characteristics and miniaturisation advantages are outlined. It is shown that this filter architecture is easily tuneable. MEMS switches can be used to switch line lengths and thus cause the centre frequency of the filter to be altered. MEMS switching is a preferred tuning method because it eliminates the non-linearity introduced by conventional tuning elements. A technique for designing a capacitively loaded, split ring filter is presented and some simulation and measurement results are given. The possibility of pushing the second resonant frequency beyond twice the fundamental frequency is highlighted as a feature of slow-wave filters. This feature is shown to be of limited advantage with the architecture under discussion
Translated title of the contributionMiniature distributed filters for software re-configurable radio applications
Original languageEnglish
Title of host publicationIST Mobile Communications Summit, Thessaloniki, Greece
Pages159 - 163
Publication statusPublished - Jun 2002
EventIST Mobile Communications Summit - Thessaloniki, Greece
Duration: 1 Jun 2002 → …


ConferenceIST Mobile Communications Summit
Period1/06/02 → …

Bibliographical note

Conference Proceedings/Title of Journal: IST Mobile Communications Summit, 2002
Rose publication type: Conference contribution

Sponsorship: This paper is based upon work performed within the framework of the IST project IST-1999-12070 TRUST, partly funded by the European Union. The authors would like to acknowledge the contributions of their
colleagues from Siemens AG, France Télécom - CNET, Centre Suisse d’Electronique et de Microtechnique S.A., King's College London, Motorola Ltd., Panasonic European Laboratories GmbH, Telefonica Investigacion Y Desarrollo S.A. Unipersonal, Toshiba
Research Europe Ltd., TTI Norte S.L., University of Bristol, University of Southampton


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