Title :
A Ka-band YIG-based local oscillator for astronomical heterodyne receiver
Author :
Yue-Fang Kuo ; Yuh-Jing Hwang
Author_Institution :
Inst. of Astron. & Astrophys., Taipei, Taiwan
Abstract :
A Ka-band local oscillator generator based on YIG-tuned oscillator is designed, fabricated and measured for astronomical telescope applications. The optimized bandwidth analysis can overcome high phase noise problems caused by poor microwave photonic source noise and to improve the outband phase noise of LO by at least 10.5 dB. The experimental results show that the 33.8 GHz LO phase noise of -107 dBc/Hz is achieved at offset frequency of 700 kHz and exhibits a reference spurs of -71 dBc.
Keywords :
heterodyne detection; microwave frequency convertors; microwave oscillators; microwave photonics; phase noise; radio receivers; radioastronomy; radiotelescopes; astronomical heterodyne receiver; astronomical telescope applications; frequency 33.8 GHz; frequency 700 kHz; high phase noise problems; local oscillator; microwave photonic source noise; optimized bandwidth analysis; outband phase noise; Bandwidth; Microwave filters; Microwave oscillators; Phase locked loops; Phase noise; Ka-band; frequency conversion; low phase noise; microwave oscillators; phase noise; phase-locked loops; photomixer; radio astronomy;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2013 Asia-Pacific
Conference_Location :
Seoul
DOI :
10.1109/APMC.2013.6695133
