发明名称 |
High spectral purity microwave oscillator using air-dielectric cavity |
摘要 |
A high spectral purity microwave oscillator is provided. The Oscillator uses an air-dielectric cavity and employs the known carrier-suppression technique. In one embodiment, the oscillator employs a high-Q cavity to self-sustain an oscillating signal formed by feeding back into its input a power-amplified output signal of the cavity in which residual phase noise in the amplifier stages is suppressed. A bandpass filter selects the cavity mode. FIG. 1 illustrates this embodiment. Another embodiment suppresses the noise of a voltage-controlled oscillator whose frequency and power-amplified output interrogates the cavity mode. FIG. 2 illustrates this embodiment.
|
申请公布号 |
US7075378(B2) |
申请公布日期 |
2006.07.11 |
申请号 |
US20040885118 |
申请日期 |
2004.07.07 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF COMMERCE, THE NATIONAL INSTITUTE OFSTANDARDS AND TECHNOLOGY |
发明人 |
HOWE DAVID A.;GUPTA AMITAVA SEN;NELSON CRAIG;WALLS FRED L. |
分类号 |
H03B5/18;H03B9/12;H03L7/00;H03L7/081;H03L7/099 |
主分类号 |
H03B5/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|