solrs

A novel approach based on ALM has been proposed to model coupling factor and [Q.sub.ext] of SOLRs. This ALM-based modeling approach has been implemented to model the coupling factor of electrically and magnetically coupled SOLRs versus three important effective parameters, i.e., spacing between resonators, resonator length and substrate permittivity.

Figure 2 shows a typical tapped-line feeding structure for a SOLR.

These modeled [Q.sub.ext] and coupling factors provide the required tool for designing SOLR filters in a wide variation range of electrical characteristics such as center frequency and fractional bandwidth.