Small-sized frequency synthesizing signal source for vehicle-mounted anti-collision radar system

Abstract

The invention provides a small-sized frequency synthesizing signal source for a vehicle-mounted anti-collision radar system, and the small-sized frequency synthesizing signal source comprises a reference frequency source, a phase indentifying device, an amplification filtering circuit, a pressure control oscillator, a program frequency divider and a power divider, wherein the output end of the reference frequency source is connected with the input end of the phase indentifying device; the output end of the phase indentifying device is connected with the input end of the amplification filtering circuit; the output end of the amplification filtering circuit is connected with the input end of the pressure control oscillator; the output end of the pressure control oscillator is connected with the input ends of the program frequency divider and the power divider; and the output end of the program frequency divider is connected with the input end of the phase indentifying device. According to the small-sized frequency synthesizing signal source disclosed by the invention, a common sheet material and a micro-belt sheet material can be respectively wired and pressed, so that the problem that the interference of a high-frequency signal wire on a common circuit board is great can be avoided, and the problems that the cost is high and the mechanical strength is small, which are caused by using a single micro-belt sheet material to wire, are solved; a radar transmission frequency of about 77 GHz can be output and the bandwidth of 150 MHz is provided; and the volume is small, the space is saved and the better dispersed degree can be guaranteed on the premise of realizing double-channel output.

Description

technical field [0001] The invention relates to the field of vehicle-mounted anti-collision radar systems, in particular to a small frequency synthesis signal source formed by a combined circuit of a phase-locked loop and a voltage-controlled oscillator. Background technique [0002] Automobile anti-collision radar is a kind of active safety equipment, which can accurately measure the speed and distance of surrounding targets, detect potential dangers, send alarms to drivers in time, and automatically take measures to eliminate dangers when necessary. [0003] Foreign research is relatively early, and some research results have already been obtained. For example, a radar with a frequency of 36GHz developed by the U.S. Public Transportation Administration can automatically brake when it finds an obstacle 30-40 meters ahead; An alarm is issued when the distance between vehicles is less than a certain distance; Honda Motor Company has studied the use of a fan-shaped laser beam...

AI Technical Summary

Problems solved by technology

[0007] However, the development of related technologies in China is lagging behind. In many papers, there are only verification studies of related back-end algorithms, or frequency synthesis signal sources built with pure analog circuits. Their volume and weight cannot meet the requirements of vehicle system integration, let alone in the actual road environment. application in

[0008] The 13th Institute of China Electric Power Co., Ltd. in Shijiazhuang, Hebei Province has also carried out the development and development of related components. It adopts the technology of local oscillator plus frequency mixing plus DDS (digital display oscilloscope) control technology. Although it can meet the basic requirements, in practical applications due to its signal The stray is not ideal and the volume is too large, so it is difficult to be practically applied and marketed in the front-end of the car with limited space

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