Compact TGV-Based Bandpass Filters Using Integrated Dual Composite Right/Left-Handed Resonators

This brief presents a synthesis methodology for miniaturized bandpass filter using an integrated dual composite right/left-handed (ID-CRLH) resonator unit by through glass via (TGV) technology. The mapping between the circuit parameters and the layout structure is proposed to provide an insight into the characteristics of the resonator for the purpose of guiding the design of the filter. TGV plays an irreplaceable role in ID-CRLH as a means of integration. Subsequently, the miniaturization and design flexibility benefits of TGV as an interconnect component, equivalent inductor and coupling element are elaborated. Additionally, the fractional bandwidth tunability from 14% to 34% and the ultra-compact circuit area of 0.067 lambda(g)x0.051 lambda(g) further reveal the superiority of this configuration. Furthermore, two prototypes characterized by broadband and miniaturization are designed and manufactured to unveil the correctness and advancement of this synthesis procedure. The simulated and measured response curves demonstrate the good agreement.