A microwave radiometer with postdetection pulse-width modulation

被引：0
|
作者：
Filatov, A.V. [1 ]
机构：
[1] Permafrost Inst., Siberian Div. of RAS, Chita, 672010, Russia
来源：
Pribory i Tekhnika Eksperimenta | 2002年 / 45卷 / 01期
关键词：
Control - Frequency response - Microwaves - Performance - Pulse width modulation - Signal processing;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A microwave radiometer with additional pulse-width modulation of the reference signal is described. The pulse-width modulation is performed in the low-frequency unit using resistive attenuators with different division factors of the reference signal. The radiometer implements a modification of the null measurement method when the automatic control is attained by varying duration of a pulsed signal. Changing the radiometer low-frequency circuit to the null-balance mode allows us to use high-frequency units of any chopper radiometer with symmetric modulation.
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页码：80 / 86
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