A Millimeter-Wave Bandpass Filter Based on Substrate Integrated Dielectric Resonator

In this paper, a substrate integrated dielectric resonator (SIDR) is utilized to realize a novel millimeter-wave bandpass filter (BPF) for the first time. The dielectric resonator is fabricated using substrate and packaged by multi-layer PCB technology. Two degenerated modes TEδ11 and TE11δ1 are used and excited by the slot coupling feeding mechanism. A prototype operating at 30 GHz is designed and simulated. The simulated result demonstrates a low insertion loss of 1.57 dB with a fractional bandwidth of 6% considering the metal and dielectric loss. Advantages of low profile, light weight, and convenience in integration can be also observed.