Design of an X-band Oscillator Using Novel Miniaturized Microstrip Hairpin Resonator

This paper presents a novel miniaturized microstrip hairpin resonator and applies it to the design of an X-band oscillator. The measurement of the resonator itself shows that the suggested resonator provides a higher loaded quality factor with reduced circuit area compared to the conventional hairpin resonator. The oscillators are designed to operate at 9.2 GHz using the conventional and novel hairpin resonators, to compare the phase noise performance. The measurement shows an output power of 9.78 dBm and 10.87 dBm, respectively. The phase noise of the oscillator using the novel resonator shows -101.49 dBc/Hz at 100 kHz offset, which is better than that of the conventional resonator by 6.17 dB.