Design Of T/R Component System Based On W Band SOC Radio Frequency Chip

Millimeter-wave anti-collision radar is the core part of short-and medium-range detectors,and is widely used in many fields such as rail transit,automotive radar,and aircraft navigation.The T / R component is the core module of millimeter-wave radar.In the early research of millimeter wave anti-collision radar,the system has poor system degree,high cost,huge volume,and the working frequency band is mostly 24 GHz and 35 GHz.After entering the 21 st century,the W-band 77 GHz millimeter-wave radar has developed rapidly.It has a high operating frequency band and a large bandwidth,which is beneficial to integration and is very conducive to the system design of small radar front-end T / R components.However,due to the high frequency,short wavelength,and large loss of the W-band,the system design of the radar front-end T / R module has become a research difficulty.This paper has carried out detailed design and research on 77 GHz anti-collision radar T / R components.It has adopted a 2-transmission and 4-receiving RF integrated chip for multi-channel,miniaturized system packaging design,which solves the current Low-cost design challenges.The first chapter of this article outlines the development status of W-band T / R modules and chips at home and abroad,summarizes the main content of this article and the RF transition structure of the research and design;the second chapter briefly introduces the composition structure and transceiver of T / R components The principle of channel communication,and then elaborated the meaning of each index of T / R component;Chapter 3 carried out detailed overall scheme design for this subject,including subject index,T / R module structure design,communication link,preresearch Demonstration and anti-electromagnetic interference measures and methods,focusing on the integrated packaging design of the 2x4 collected RF SOC chip,so that the overall T / R components are miniaturized,low cost,and save a lot of simulation design time;The overall design plan has been designed in detail for the structure of the RF interconnection circuit.For the simulation of the waveguide microstrip probe transition,a fine needle probe is used for electromagnetic coupling,and the short-circuit surface is integrated into the PCB circuit board.The simulation results are passband The frequency is 72.3GHz-82.5GHz,and the insertion loss is 0.2d B;the use of GCPW-like coaxial-GCPW in the design of the vertical transition structure,a miniaturized transmission transition method,simulation The results show that the structure has full passband characteristics below 100 GHz,S11 is all below-16 d B,and the ideal matching effect is achieved below 56 GHz,and the insertion loss at 40 GHz is 0.42 d B.This result shows that in the miniaturized and ultra-wideband In the design of the vertical transition structure,the structure has a very broad application prospect;and in the study of BGA to microstrip transmission line,a matching circuit is introduced to cancel the capacitance characteristics of the solder ball.In the 72GHz-106 GHz band,S11 is less than-15 d B,and in The frequency band required by the indicator is less than-20 d B,and the insertion loss is 0.4d B.Finally,in Chapter 5,the ADS communication simulation software was used to conduct the simulation test research on the transceiver channel of this subject,and the passive transition simulation results of the simulated design were exported to The overall communication link test was conducted in ADS.The simulation results show that the receiving channel is basically below-20 d B in 75GHz-80 GHz,the noise figure is 11.324 d B,the gain is 57.602 d B,there is almost no spurious signal in the baseband output signal,and the transmitting channel All S11 in 75GHz-80 GHz are below-18 d B,and the gain is 24.602 d B.In this paper,the test piece design of the waveguide probe microstrip transition structure and the vertical transition structure is also carried out.The waveguide microstrip probe structure is simulated back-to-back,and the PCB circuit board and the metal waveguide structure are designed.The test circuit was drawn on the PCB circuit board.Although there has not been an overall test of T / R components due to the outbreak of the epidemic,the design scheme and design circuit structure of this article still have practical value.The simulation results show that the design of this topic has reached the index requirements.The design of T / R components and multilayer PCB RF interconnection transition structure has reference significance.