Speaker
Mr
Vicente Boria
(VSC (ES) , UPV (ES))
Description
A novel concept of band-pass filter using substrate integrated coaxial resonators is developed in this contract. These filters implement a classical waveguide combline topology into SIW technology. The outer conductor is formed by circular or rectangular rows of via holes, while the inner conductor of the coaxial resonator is implemented using an additional plated via. Capacitive loading at one end of the resonator is obtained using the fringing fields through a gap etched on the top metal plate of the substrate. Thus, a TEM mode is established along the vertical direction of the structure. This structure enables a significant reduction on the resonator size (i.e. more than 50% compared to conventional TE101 configurations), providing not only compactness but also improved spurious-free range and post-fabrication tuning capabilities.
Moreover, it is possible to introduce magnetic and electric cross-couplings between integrated coaxial resonators using current or capacitive probes respectively. This enable us to implement advanced filtering functions with prescribed transmission zeros and group delay equalization in order to satisfy the stringent rejection and isolation requirements of most space applications.
In this contract two 6-pole C- and K-band filters with challengin specifications in terms of selectivity and miniaturization have been designed and manufactured showing promising results.
Primary authors
Mr
Alberto Valtueña
(WATIVE-TECH (ES))
Mr
Hervé Leblond
(TAS (FR))
Mr
Jorge D. Martínez
(UPV (ES))
Mr
Stefano Sirci
(UPV (ES))
Mr
Vicente Boria
(VSC (ES) , UPV (ES))
