HTS Cavity and Low Phase Noise Oscillator for Radar Application

Hong LI  Tiefeng SHI  Aisheng HE  Chunguang LI  Zhonglin GONG  Zhengfang FAN  Tiejun LIU  Yusheng HE  

IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.3   pp.700-703
Publication Date: 2002/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Superconductive Electronics)
Category: Microwave Devices and Systems
Doppler radar,  sapphire substrate,  cavity resonator,  oscillator,  

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A stabilized local oscillator is one of the key components for any radar system, especially for a Doppler radar in detecting slowly moving targets. Based on hybrid semiconductor/superconductor circuitry, the HTS local oscillator produces stable, low noise performance superior to that achieved with conventional technology. The device combines a high Q HTS sapphire cavity resonator (f=5.6 GHz) with a C-band low noise GsAs HEMT amplifier. The phase noise of the oscillator, measured by a HP 3048A noise measurement system, is -134 dBc/Hz at 10 kHz offset at 77 K.