Short-range doppler radar
US4319244A · kind A · utility
12Cited by
1References
27Claims
0Family size
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Inventors
Key dates
| Filing date | Jan 17, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Jan 17, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/032
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a Doppler radar system for measuring the velocity of a vehicle, such as an automobile, in order to lessen interference with external electric wave appliances, such as radios and televisions, caused by transmitting microwaves, one of the higher harmonics generated from a mixer diode driven by the fundamental waves of a local oscillator is selected by a filter for transmission and is used as the transmission output wave, whereby the power of the transmission waves is remarkably reduced in comparison with the mixer driving power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.