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LTCC reduced-size bandpass filters based on capacitively loaded cavities for Q band application

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6 Author(s)
Ferrand, P. ; Faculte des Sci. de Limoges, IRCOM-UMR, Limoges, France ; Baillargeat, D. ; Verdeyme, S. ; Puech, J.
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The filter presented here is composed of cavities delimited in a LTCC substrate by a periodic lattice of metallized via-holes. The resort to LTCC technology permits us to improve the structure bulk by adding capacitive posts in the middle of the cavity. I/O CPW feeds are printed on the top face of the substrate and are suitable for planar circuit integration. A filter, functioning around 42.6 GHz with bandwidth at -3 dB of 7% and insertion losses lower than -0.6 dB has been designed and realized with success.

Published in:

Microwave Symposium Digest, 2005 IEEE MTT-S International

Date of Conference:

12-17 June 2005