Title :
Microwave phase-locked loop circuit development and efficiency improvement
Author :
Teng, K.H. ; Linton, D. ; Humphrey, D.
Author_Institution :
Sch. of Electr. & Electron. Eng., Queen´´s Univ., Belfast, UK
Abstract :
A sampling phase detector (SPD) circuit for locking a microwave VCO, at 19.6 GHz, is proposed. Based on the step recovery diode as the locking source and the Schottky diode mixer, the SPD is implemented into the phase-locked loop (PLL) concept. Harmonic balance simulation is used to determine the output power level. Different drive levels are examined within the PLL circuit to achieve the lowest power level for a reliable lock and hence the optimum input/output match is determined for best efficiency.
Keywords :
Schottky diode mixers; microwave oscillators; phase detectors; phase locked loops; voltage-controlled oscillators; 19.6 GHz; Schottky diode mixer; drive levels; harmonic balance simulation; locking source; microwave VCO; microwave phase-locked loop circuit; output power level; sampling phase detector; step recovery diode; voltage controlled oscillators; Circuit simulation; Detectors; Microwave circuits; Phase detection; Phase locked loops; Power generation; Power system harmonics; Sampling methods; Schottky diodes; Voltage-controlled oscillators;
Conference_Titel :
High Frequency Postgraduate Student Colloquium, 2003
Print_ISBN :
0-7803-8123-8
DOI :
10.1109/HFPSC.2003.1242323
