Section: New Results

Circuit realisations of filter responses: determination of canonical forms and exhaustive computations of constrained realisations

Participants : Smain Amari [Royal Military College, Kingston, Canada] , Jean Charles Faugère [EPI SALSA, INRIA Rocquencourt] , Giuseppe Macchiarella [Politecnico di Milano, Milan, Italy] , Uwe Rosenberg [Design and Project Engineering, Osterholz-Scharmbeck, Germany] , Matteo Oldoni [Politecnico di Milano, Milan, Italy] , Fabien Seyfert.

We pursued our work on circuit realisations of filter responses with mixed type (inductive or capacitive) coupling elements and constrained topologies [1] . We now focus on the use of resonating couplings in the design of asymmetric filter's characteristics without the use cross-coupling in order to simplify the practical implementation. In parallel, efforts are being payed to improve the synthesis method for higher order filters, having in mind application to diplexers with high number of symmetrically located transmission zeros.