Full analog microwave sensor for multiple range selection and ultra-low power consumption
US9335401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2014 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Aug 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/584
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microwave sensor adjusts its sensing range based on a range gate selected from multiple range gates. An active antenna module transmits a first FMCW signal toward a target based on the selected range gate and for receiving second FMCW signal reflected from the target. A modulating module is used for generating modulation signal. The bandwidth of the first FMCW signal depends on an amplitude of the modulation signal. A first demodulator is used for demodulating the first FMCW signal and the second FMCW signal to generate beat frequency. A second demodulator is used to demodulate the beat frequency signal to generate a Doppler signal. An indentifying circuit is used for generating a triggering signal based on a voltage difference between integral of the Doppler signal from an object within the rage gate and an integral of clutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.