Millimeter wave communication and radar integrated radio frequency front end designing method

Abstract

The invention provides a millimeter wave communication and radar integrated radio frequency front end designing method, and aims at achieving the diversity of signal receiving and transmitting of a millimeter wave radar, integration of millimeter wave communication and radar functions and integration of a millimeter wave radar radio frequency front end and a transmitting-receiving antenna. According to the millimeter wave communication and radar integrated radio frequency front end designing method, firstly, on the basis of a universal communication chip, a radar transmitting-receiving circuitis designed, therefore, the millimeter wave radar can transmit and receive baseband input signals of an arbitrary modulation system, necessary hardware support is provided for a more complex parameter estimation algorithm for radar signal processing, and at the same time, the integration of the communication and the radar is achieved; then, a microstrip balun structure and a microstrip antenna which are used for converting differential signals into single-ended signals are designed for the radio frequency front end, so that integration design of the millimeter wave radar radio frequency frontend and the transmitting-receiving antenna is achieved; finally, a strip-line feed structure is designed for the microstrip receiving antenna of a radio frequency front end receiving circuit, and theinfluence of a microstrip feed line self-radiation direction on an antenna self-radiation direction diagram is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave radar, and relates to a design method of a radio frequency front end integrating millimeter wave communication and radar. Background technique [0002] Millimeter wave is one of the main fields for human beings to develop frequency resources in the future. In recent years, drones, unmanned vehicles, millimeter wave gesture recognition, and millimeter wave security detection are becoming research hotspots. UAVs with powerful performance and flexible handling are inseparable from a mature and stable obstacle avoidance system. Unmanned vehicles that are safe, stable, and comfortable experience cannot do without a road condition perception system with accurate detection and quick response, combining virtual reality and being able to interact with machines The various somatosensory games are inseparable from the sensing system that perceives various subtle movements of the human body. The safe...

AI Technical Summary

Problems solved by technology

[0006] However, there are also some difficulties and challenges in the implementation of radar functions by general-purpose communication chips, such as RF front-end signal leakage, signal coupling between transmitting and receiving channels, and narrow bandwidth of transmitting and receiving signals due to the low sampling frequency of analog-to-digital conversion devices.

In view of the above problems, we put forward some solutions. For example, in order to solve the problem of RF front-end signal leakage, we designed the separation cavity of each module of the circuit board; We expand the bandwidth of the transmitting and receiving signal by adjusting the local oscillator of the transmitting and receiving path

[0007] The traditional microstrip-fed microstrip array antenna produces electromagnetic radiation on its microstrip feeder and couples it into the air, which will affect the radiation pattern of the antenna itself.

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