发明名称 |
LOW NOISE GENERATOR FOR FREQUENCY SWEPT SIGNALS |
摘要 |
A signal generation system suitable for use in a radar system comprises a local oscillator (LO) and an intermediate frequency (IF) oscillator, wherein the IF oscillator is a Direct Digital Synthesiser (DDS), and the LO is a free running oscillator not itself locked to another oscillator but which acts as a clock reference for the DDS and is the highest frequency oscillator in the system. The LO may also act as a reference for a receive chain digitiser. The invention exploits phase noise advantages of a free running oscillator at some distance from the carrier whilst maintaining coherency with other system components. The system typically finds application in FMCW radars.
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申请公布号 |
US2010090886(A1) |
申请公布日期 |
2010.04.15 |
申请号 |
US20080524070 |
申请日期 |
2008.01.31 |
申请人 |
QINETIQ LIMITED |
发明人 |
BEASLEY PATRICK DAVID LAWRENCE |
分类号 |
G01S13/00;G06G7/16;H03B7/12;H03K5/01 |
主分类号 |
G01S13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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