Microwave sensor having function of range gates
US9274217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2013 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Nov 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microwave sensor is disclosed. The microwave sensor includes an active antenna module, a first low pass filter, a second demodulator, a modulation module, and a discrimination control module. The active antenna module is utilized for transmitting a first FMCW signal towards a target and receiving a second FMCW signal reflected back from the target according to a sweep period. The active antenna module includes a loop antenna and a radio frequency transistor. The first low pass filter and the radio frequency transistor form a first demodulator. The first demodulator and the second demodulator perform two-stage down converting and demodulating to extract information for calculating range and velocity, respectively. The present invention adjusts a radio frequency bandwidth of the FMCW signal by first adjusting an amplitude of a modulation signal generated by the modulation module to control various detection ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.