Ku-band microstrip diplexer based on dual behavior resonator filter

This report describes the design of original planar filters and of a diplexer based on dual behavior resonator (DBR) filter, and introduces measurement data. The specifications dealt with a limited frequency band in Ku-band where a high isolation is needed between Rx and Tx frequency bands. This stu...

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Bibliographic Details
Main Authors: Manchec, A., Rius, E., Quendo, C., Person, C., Favennec, J.F., Moroni, P., Cayrou, J.C., Cazaux, J.L.
Format: Conference Proceeding
Language:English
Subjects:
Attenuation
Band pass filters
Distributed Bragg reflectors
Frequency
Insertion loss
Microstrip filters
Microstrip resonators
Microwave filters
Resonator filters
Topology
Online Access:Request full text
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Summary:This report describes the design of original planar filters and of a diplexer based on dual behavior resonator (DBR) filter, and introduces measurement data. The specifications dealt with a limited frequency band in Ku-band where a high isolation is needed between Rx and Tx frequency bands. This study evidences the benefits of oversized DBR in particular for getting a high rejection level. Moreover, folding the oversized resonators allows one to keep constant the filter overall size. The first DBR filter for the Ku-band receiver is of 3rd-order with a central, folded, oversized and low-frequency stub; the second DBR filter for the Ku-band transmitter is also of 3rd-order with three folded, oversized and high-frequency stubs. Then, a diplexer as presented in Rhodes and Ievy (1979) and Matthanei et al. (1980) was realized from both filters as stated in Goron et al. (2003) and Tudosie and Vahlieck (2004).
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2005.1516648