Kenichi Iio

Millimeter-wave DRO with Excellent Temperature Stability of Frequency

Novel millimeter-wave dielectric resonator oscillators (PRO) and dielectric resonator voltage controlled oscillators (DR-VCO) have been developed for communication systems. The authors have been developing DROs with a novel structure called PDIC (planar dielectric itegrated circuit), which layers are composed of a microstrip circuit substrate stacked on a high ¿r dielectric resonator (DR) substrate with electrodes on both surfaces. The DR substrate and a pair of hollow patches on the electrodes form a dielectric resonator (TE010 mode DR). This paper focuses on the improvement of the temperature stability of the PDIC-DRO by controlling the material composition of the DR. An excellent temperature stability of oscillation frequency of less than 1ppm/deg C has been obtained for DRO and DR-VCO. The phase noise of the DRO and DR-VCO is - 100dBc/Hz and ¿94 dBc/Hz at 100kHz offset respectively. The DRO or DR-VCO without PLL can be used for millimeter-wave sources of communication systems.