Research On E-Band Millimeter-wave Multi-Channel Broadband Transceiver Front-End

With the increasing demand for bandwidth-intensive applications in the modern wireless communication industry,the demand for the use of high-capacity millimeter wave(mm Wave)systems is accelerating.The frequency range from 60 GHz to 90 GHz is called E-band,and the total bandwidth of the two licensed frequency bands of 71-76 GHz and 81-86 GHz can reach 10 GHz.It is at the low point of atmospheric attenuation in E-band and has great application prospects.Thesis researches and designs an E-band millimeter-wave multi-channel broadband transceiver front-end.The specific research contents are as follows:Firstly,the advantages of millimeter wave wireless communication and the research results of E-band wireless communication at home and abroad are introduced,and then several traditional transceiver architectures and typical E-band transceiver architectures are introduced,several frequency synthesis technologies are compared,and the transceiver Important performance indicators for the front end.Secondly,design the E-band millimeter wave multi-channel broadband transceiver front-end,subdivide the system into four modules: radio frequency transceiver module,intermediate frequency transceiver module,local oscillator module,main power supply and control module,and complete the index analysis and chip selection of each module,link simulation and circuit implementation.The characteristics of the transceiver front end are: multi-channel,support dual-polarization multi-stream transmission and beam alignment and tracking;high flexibility,high transmit power and small size can be used with various antennas,such as horn antennas,high-gain arrays and cassegrain antenna completes long-distance transmission and can cover the E-band licensed frequency band;it has complete system functions.Finally,test the system,first test the various indicators of the transmitting module,receiving module,LO module and system direct connection,and then conduct the wireless transmission test of the system with different antenna systems and different distances.The test results show that when the 71-76 GHz and 81-86 GHz systems are directly connected,they can transmit 64-QAM modulated signals with a bandwidth of1 GHz in 64-QAM,and they can transmit 16-QAM modulated signals with a bandwidth of 1GHz at close range with a horn antenna;81-86 GHz system with high-gain array and Cassegrain antenna can transmit 300 MHz bandwidth QPSK modulated signal at a distance of 50 km,supporting multi-stream transmission and beam tracking.