Automotive forward looking sensor application
US5929802A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Nov 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93271
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automotive forward looking sensor (FLS) includes (a) a voltage controlled oscillator (VCO) having an input port to which a VCO control signal comprising at least one of a ramp up portion and a ramp down portion is coupled and an output port at which a transmit RF signal is provided for coupling to a transmit antenna and (b) a linearization circuit having a first input port to which a feedback signal proportional to the transmit RF signal is coupled, a second input port to which a fixed frequency reference signal is coupled and an output port at which an error signal proportional to at least one of a phase difference and a frequency difference between the feedback signal and the fixed frequency reference signal is provided, wherein the VCO control signal is a function of the error signal and wherein the at least one ramp up portion and ramp down portion has a substantially linear slope. The FLS also includes an antenna assembly having thirteen antenna beams thereby allowing accurate resolution of multiple objects at distances up to 100 meters from the FLS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.