A SMALL DIELECTRIC TEM MODE RESONATOR WITH A CROSSING SLOT AND ITS APPLICATION TO A CELLULAR RADIO VCO

A small TEM mode dielectric resonator which has a new feature with a c rossing slot on the outer ground conductor plane is presented. The slo t, functioning as a short-ended stub line serially inserted into the t ransmission line, can tune the resonant frequency down. The resonant f requency in a stripline resonator structure is rigorously analyzed by the method based on the Spectral Domain Approach, and hence the equiva lent circuit is derived. This resonator is applied to a cellular radio VCO with a varactor connected across the slot. The performance of the VCO in the 900 MHz cellular band is described.