High Power Solid-State DRO With Power Booster

A 2.446GHz high power dielectric resonator oscillator (DRO) is presented, which can generate 330W CW output power at room temperature with -98dBc/Hz at 1kHz offset,-112.6dBc/Hz at 10kHz offset, and -132dBc/Hz at 1MHz offset, with a drain efficiency of 45% by using two Freescale LDMOS transistors. In contrast, the single-device LDMOS DRO without power boost can deliver 138W CW power with -111.2dBc/Hz at 10 kHz offset and 41% drain efficiency.