A dual-band bandpass filter with widely separated passbands

Umair Naeem (1, 2) , Stéphane Bila (2) , Marc Thevenot (1) , Thierry Monédière (1) , Serge Verdeyme (2)

1 XLIM-OSA - OSA
2 XLIM-MINACOM - MINACOM

A novel and compact design of a dual-band filter with widely separated passbands is proposed. Applications of such a device can be found in systems where a single device is responsible for both transmission and reception. The proposed filter is composed of resonators working on two distinct modes. The proposed dual-mode structure offers a good rejection of unwanted resonances, producing a widely separated dual-band response. The idea is demonstrated with the design of a four-pole filter comprising two dual-mode structures and the concept is verified experimentally by the measurement of a fabricated prototype. Finally, a six-pole filter is proposed, showing the possibility of designing higher order filters.

Mots clés: band-pass filters; dual-band bandpass filter; dual-band response; dual-mode structure; four-pole filter; higher order filters; six-pole filter

Domaines: Sciences de l'ingénieur [physics]; Electronique

Umair Naeem, Stéphane Bila, Marc Thevenot, Thierry Monédière, Serge Verdeyme. A dual-band bandpass filter with widely separated passbands. IEEE Transactions on Microwave Theory and Techniques, 2014, Microwave Theory and Techniques, IEEE Transactions on, 62 (3), pp.450-456. ⟨10.1109/TMTT.2014.2304361⟩. ⟨hal-00924861⟩