Vehicle-mounted millimeter-wave anti-collision radar antenna system

Abstract

The invention discloses a vehicle-mounted millimeter-wave anti-collision radar antenna system comprising a back focus antenna. A lens unit is fixed to the opened end of the back focus antenna, and a microstrip antenna is fixed to the narrow end; the lens unit comprises an emitting lens and a receiving lens; the microstrip antenna includes an emitting antenna and a receiving antenna, and the receiving antenna irradiates the receiving lens through three microstrip pastes arrayed horizontally; the emitting antenna is connected to a power amplifier, a directional coupler, a pressure controlled oscillator and a linear modulator sequentially; the receiving antenna is connected to a low noise amplifier, a low pass filter and an intermediate frequency unit sequentially; the microstrip antenna adopts microstrip wire feed, the microstrip antenna array performs feed in a manner of mixing serial connection and parallel connection. The system is low in production cost and can be produced in batches; in the horizontal direction, the wave beams are narrow, the wave beam covering area is ideal, and the gain is high; the feed system consumption is low, irradiating efficiency is high, and the system can be widely applied to millimeter-wave radars of vehicles of low and medium grades.

Description

technical field [0001] The invention relates to the field of radar manufacturing, in particular to a vehicle-mounted millimeter wave anti-collision radar antenna system. Background technique [0002] With the development of our country's economy and the continuous improvement of people's living standards, the number of private cars is also increasing. Cars make our travel more convenient, but also bring more and more traffic problems. Vehicle-mounted anti-collision radar system as a Effective equipment for preventing traffic accidents and protecting personal safety has begun to attract the attention of major automobile manufacturers and consumers; Frequency Modulated Continuous Wave (FMCW) anti-collision radar in the millimeter wave band has been researched and developed in recent years. The mainstream technology of vehicle-mounted anti-collision systems has broad development prospects; however, due to its high price, millimeter-wave radar systems cannot be popularized and a...

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Problems solved by technology

[0002] With the development of our country's economy and the continuous improvement of people's living standards, the number of private cars is also increasing. Cars make our travel more convenient, but also bring more and more traffic problems. Vehicle-mounted anti-collision radar system as a Effective equipment for preventing traffic accidents and protecting personal safety has begun to attract the attention of major automobile manufacturers and consumers; Frequency Modulated Continuous Wave (FMCW) anti-collision radar in the millimeter wave band has been researched and developed in recent years. The mainstream technology of vehicle-mounted anti-collision systems has broad development prospects; however, due to its high price, millimeter-wave radar systems cannot be popularized and applied to mid- and low-end vehicles; how to reduce its cost and find a compromise between performance and price is millimeter The research hotspot of the wave anti-collision radar system; the antenna is an important part of the millimeter-wave anti-collision radar, and it is also an important part of the system cost. Can the low-cost antenna be used instead of the commonly used in the millimeter-wave anti-collision radar? Aperture antennas or mechanical scanning antennas to reduce system costs are currently issues that need to be explored and studied

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