Radio frequency device and assembly method thereof

Abstract

The embodiment of the invention provides a radio frequency device comprising an antenna shell, an absorber and a radio frequency circuit board, which can be used for a millimeter wave radar of an intelligent automobile to reduce high-frequency radiation interference from a radio frequency chip and an antenna feeder. An antenna cover is used for accommodating the radio frequency circuit board, theabsorber comprises a top surface, one or more supporting parts and one or more fixing parts, and the radio frequency circuit board comprises at least one radio frequency chip, at least one antenna feeder and at least one radio frequency antenna. A top surface covers the at least one radio frequency chip and the at least one antenna feeder but does not cover the at least one radio frequency antenna, and the one or more fixing parts are used for fixing the absorber on the radio frequency circuit board. The one or more supporting parts are used for supporting the top surface to be positioned between the antenna shell and the radio frequency circuit board.

Description

technical field [0001] The invention relates to radio frequency communication technology, in particular to a radio frequency device capable of absorbing high frequency interference signals from a radio frequency chip and an antenna feeder and an assembly method of the radio frequency device. Background technique [0002] As the main means of transportation in various countries, automobiles are becoming more and more popular. At the same time, frequent traffic accidents have also attracted people's attention. As an important part of automotive active safety technology, on-board radar can forecast danger in time, thereby improving road traffic safety. The on-board radar system can calculate the speed, angle, distance and other information of the target relative to the car by receiving the echo of the transmitted signal, and it is not disturbed by factors such as rain, fog, dust, night, etc., and has all-weather working characteristics. [0003] In the current vehicle radar sy...

AI Technical Summary

Problems solved by technology

[0004] 1. The radiation of the antenna feeder in the millimeter wave band will have a negative impact on the antenna pattern, thereby affecting the measurement quality of the radar system

[0005] 2. The chip will generate high-frequency interference signals when it is working, and will also receive interference signals from the outside world, which may interfere with the antenna transmitting or receiving signals

[0006] 3. The isolation between the antenna and each transceiver channel of the chip becomes poor under high-frequency signal interference

but, figure 2 The metal shielding cover 204 isolation method also has some disadvantages, for example: the cost of materials and assembly is relatively high; there is a risk of cavity resonance inside the metal shielding cover; the solution uses SIW feeders instead of traditional microstrip transmission lines, resulting in Increased design difficulty and cost

Images