Design and Fabrication of Low Phase-Noise Frequency Synthesizer using Dual Loop PLL for IMT-2000

이중루프 PLL을 이용한 IMT-2000용 저위상잡음 주파수합성기의 설계 및 제작

In this paper, frequency synthesizer that can be used in IMT-2000 was designed and fabricated using dual loop PLL(Phase Locked Loop). For improving phase noise characteristic Voltage Controlled Oscillator was fabricated using coaxial resonator and eliminated frequency divider using SPD as phase detector and increased open loop gain. Fabricated frequency synthesizer had 1.82㎓ center frequency, 160MHz tuning range and -119.73㏈c/Hz low phase noise characteristic.