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

fYear

2013

fDate

5-8 Nov. 2013

Firstpage

322

Lastpage

324

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2013 Asia-Pacific

Conference_Location

Seoul

Type

conf

DOI

10.1109/APMC.2013.6695133

Filename

6695133