We present in this paper a novel canonical folded prototype circuit with some couplings varying linearly with the normalized frequency. The derivation of this prototype is based on a suitable transformation of an asymmetric lattice network, generated through a sequence of matrix rotations of the coupling matrix of the folded canonical prototype. It is shown that the lattice network is a generalization of the canonical cul-de-sac form, which is obtained when the reflection zeros are all imaginary. We have also verified that the cul-de-sac forms are possible only when the reflection zeros are all imaginary (or in para-conjugate pairs). The lattice network (or the one with frequency-dependent couplings) represents a possible alternative to the cul-de-sac forms in the synthesis of star-junction multiplexers, when the synthesized filters exhibits complex reflection zeros.

A canonical prototype for coupled-resonator filters with frequency-dependent couplings

MACCHIARELLA, GIUSEPPE
2016

Abstract

We present in this paper a novel canonical folded prototype circuit with some couplings varying linearly with the normalized frequency. The derivation of this prototype is based on a suitable transformation of an asymmetric lattice network, generated through a sequence of matrix rotations of the coupling matrix of the folded canonical prototype. It is shown that the lattice network is a generalization of the canonical cul-de-sac form, which is obtained when the reflection zeros are all imaginary. We have also verified that the cul-de-sac forms are possible only when the reflection zeros are all imaginary (or in para-conjugate pairs). The lattice network (or the one with frequency-dependent couplings) represents a possible alternative to the cul-de-sac forms in the synthesis of star-junction multiplexers, when the synthesized filters exhibits complex reflection zeros.
IEEE MTT-S International Microwave Symposium Digest
9781509006984
9781509006984
Coupling matrix synthesis; Frequency-dependent couplings; Microwave Filters; Radiation; Condensed Matter Physics; Electrical and Electronic Engineering
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1008879
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 0
social impact