Miniaturized loop-filter with high out-of-band rejection for future UMTS mobile terminals

Yann Toutain (1) , Jean-Philippe Coupez (2, 1) , Christian Person (1, 2) , Michel Ney (1, 2)

1 LEST - Laboratoire d'Electronique et Systèmes de Télécommunications
2 MO - Département Micro-Ondes

This paper deals about the implementation of miniaturized band-pass filters operating on a very narrow bandwidth. An original synthesis technique is proposed for achieving high out-of-band rejection by means of a loop resonator where transmission zeros are introduced through mutual coupling effects. Quite good performances are obtained regarding losses, size and spurious resonances for the proposed topology, which can be considered as a good solution for mobile equipments.

Mots clés: Q factor; Microstrip resonators; Topology; Microstrip filters; Propagation losses; Bandwidth; Resonator filters; Band pass filters; Resonance; 3G mobile communication; Q factor

Domaines: Electronique

Yann Toutain, Jean-Philippe Coupez, Christian Person, Michel Ney. Miniaturized loop-filter with high out-of-band rejection for future UMTS mobile terminals. 30th European Microwave conference 2000, Oct 2000, Paris, France. pp.324-327, ⟨10.1109/EUMA.2000.338626⟩. ⟨hal-02359043⟩