Design of 9.4 GHz Dielectric Resonator Oscillator with an Additional Single Stage Amplifier

An oscillator is an essential component as the energy source in microwave telecommunication system. This paper design and realize a design of 9.4 GHz dielectric resonator oscillator (DRO) with one stage amplifier. The propose of the added amplifier is to increase high-level output power for system requirements. In this design, the DRO is constructed by using a resonance effect of a dielectric resonator component with the microstrip line coupled. A circuit of RLC shunt is used as dielectric resonator modeling while the quarter wave transformers are used for the matching impedance of the amplifier. The DRO which is deployed on Roger- Duroid 4350 applies the bipolar junction transistor (BJT) of BFP640 type for oscillator circuit and BJT of BFP 840ESD type for the amplifier circuit because those have a low noise figure. The Advanced Design System (ADS) is applied to design and simulate the DRO circuit. The simulation results show the output power at 9.4 GHz is 21.6 dBm while the phase noise exhibits -118.8 dBc/Hz at 100 KHz frequency offset. In the practical measurement, the output power at 9.4 GHz is -2.82 dBm with 20 dB attenuation and the phase noise is -133.48 dBc/Hz at 100 KHz frequency offset.