A non-linear CAD model for the regenerative dielectric resonator oscillator

The regenerative dielectric resonator oscillator consists of an independent amplifier followed by a power divider that is connected to a feedback path. The feedback path consists of a two port dielectric resonator cavity and a phase shifter. The output of the phase shifter is then connected to the amplifier´s input to complete the oscillator feedback loop. It has been demonstrated that this type of oscillator can achieve far superior phase noise performance over other designs in the microwave frequency range. Specifically, this paper describes the process of design and analysis of a 5 GHz regenerative dielectric resonator oscillator. The oscillator is based on a multistage amplifier using the AT41435 packaged bipolar device. A two port dielectric resonator cavity has been assembled and characterized separately. A mechanical phase shifter is used in the loop to adjust the oscillator phase. LIBRA a nonlinear CAD simulator by HP-EESOF, is used to perform both linear and nonlinear computer simulation