Research On Key Technologies Of Short Millimeter Wave Transceiver Component

With the continuous development of semiconductor technology and information industry,short millimeter wave system has become the research focus in the field of microwave technology.It has a wide range of applications in high-speed wireless communication,nondestructive detection,remote sensing imaging,precision guidance and other fields.As an important part of the communication and radar system,the short millimeter-wave transceiver component determines the performance of the whole system.Therefore,this thesis focuses on the research of short millimeter-wave transceiver components,i.e.solid-state amplifiers and the frequency multipliers based on Schottky barrier diodes.On this basis,the transceiver front-end in the form of module cascade is constructed,and the miniaturized detachable transceiver front-end is developed.The main research contents include:(1)Research on monolithic packaging technology.To solve the problems of excessive parasitic effect and high loss of gold wire bonding in short millimeter-wave band,in this thesis,the inverted packaging technology is applied to the low-noise amplifier module,and an inverted microstrip transition structure covering 180-280 GHz is designed.The simulated return loss is better than 20 d B and insertion loss is less than0.4d B.This structure does not require gold wire bonding and is less affected by frequency.The final completed low-noise amplifier module achieves a gain of 12.6-17.7 d B in 220-240 GHz.(2)Development of the frequency multiplier based on Schottky barrier diode.To solve the problems of slow reduction process and difficult batch processing of SNP files in the traditional design method of frequency multiplier,in this thesis,a joint simulation method of the frequency multiplier based on mdf file is proposed.This method realizes batch export of SNP files in electromagnetic simulation software and variable processing of SNP files in circuit simulation software,thus,the design efficiency of the frequency multiplier improved.Based on the method,two 110 GHz series balanced triplers and a231 GHz parallel balanced tripler are designed.The output power of the balanced 110 GHz tripler based on R52C23 is greater than 3m W from the frequency range of 101-125 GHz with a maximum power output of 5.6 m W,and the in-band efficiency is 3%-4.67%.(3)Development of the miniaturized detachable transceiver assembly.To solve the problem of large volume of the cascade transceiver module,in this thesis,a design method of miniaturized detachable transceiver assembly is proposed.Thereinto,an inline transition using a Wedge-Waveguide Iris is introduced to reduce the size of the transition structure,a waveguide choke is introduced to avoid the electromagnetic leakage caused by the gap,and the end-stage functional circuit is set as an inline structure to realize the detachable device replacement.Compared with the transceiver assembly in the form of module cascade,the size of the transmitter and receiver front-ends designed by the miniaturized detachable design method is reduced by 98.4% and 98.6%,respectively.The output power of the miniaturized transmitter front-end is greater than 4m W in the output frequency range of 222-227 GHz,and the single sideband conversion loss of the miniaturized transmitter front-end is 8.55-15.4d B.The solution can be applied to future short millimeter wave and terahertz communications,miniaturized transceiver component design for radar systems,etc.