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Communication Dans Un Congrès Année : 2003

Accessing to UMTS filtering specifications using new microstrip miniaturized loop-filters

Résumé

A new topology for the design of microstrip loop-filters is proposed in this paper. This new geometry is used in a coupled-loop-resonator filter in order to improve the out of band rejection (by introducing an additional transmission zero), as well as insertion loss (thanks to a significant circuit size reduction). The design methodology of these filters is first described and then experimental performances are discussed. Finally, a high performance duplexer, specified for UMTS frequencies and requirements (i.e. in the 1.9-2.17 GHz frequency band), is presented. Measured insertion loss is lower than 2.5 dB and an isolation level greater than 40 dB is achieved between Tx/Rx channels, thanks to the multiple out of band transmission zeros introduced in the filter synthesis.

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Electronique
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hal-02359481 , version 1 (05-04-2022)

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Erwan Goron, Jean-Philippe Coupez, Christian Person, Yann Toutain, Hervé Lattard, et al.. Accessing to UMTS filtering specifications using new microstrip miniaturized loop-filters. IEEE MTT-S international microwave symposium digest, Jun 2003, Philadelphie, États-Unis. pp.1599-1602, ⟨10.1109/MWSYM.2003.1210443⟩. ⟨hal-02359481⟩
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