Millimeter-wave notch filter based on multisegment dielectric resonator onslotline

This paper proposes a multisegment dielectric resonator (MSDR) placed on a slotline for millimeter-wave filter applications. The MSDR structure, inclu ding a rectangular dielectric lump and a thin low-dielectric insert, is qui te useful for adjusting the coupling between the slotline mode and the reso nant mode, leading to improve the filter performances. In addition, by tuni ng dimensions of the MSDR, a sharp and clear notch response can be designed in the transmission parameter. Me have demonstrated the filter characteris tics both theoretically and experimentally, and showed the practical proced ure for the design of MSDR filters.