Investigation On Millimeterwave And Terahertz Key Components And System Front-end Integrated Chip

Applications such as 5G/6G millimeter-wave(MMW)large-scale array systems,automotive MMW radar systems,MMW gesture recognition radars,terahertz ultra-high-speed wireless transmission systems,and terahertz imaging systems are increasingly in demand of high-performance and low-cost front-end integrated chips.In the dissertation,we major in the high-performance and low-cost integration technology front-end integrated chips.and deeply study a variety of MMIC devices and system front-ends in the MMW and terahertz frequency band.The dissertation is organized as follows:(1)The first chapter is the introduction.The background,status and significance of the research in this article are elabrated.Research progress in industry and academia is briefly introduced.Millimeter-wave and terahertz integration technology in different application systems and the future development trend are described,and the main content and chapter arrangement of this disssertaion are introduced.(2)Chapter 2 studies millimeter-wave and terahertz mixers.Based on the application requirements of broadband and multi-bands system,such as MMW communication systems and radar systems,a new type of ultra-wideband dual-band switchable star mixer is proposed for the first time.Four sets of transistor switches are employed to control the four stubs of the star mixer Marchand balun respectively,so the operating frequency band of the star mixer can be changed.The test results show that the mixer can switch between the 43-63 GHz and 55-85 GHz frequency bands.The conversion loss of the mixer is 7-10 d B in low frequency band,and10.5-13 d B in the high frequency band.Moreover,a J-band fourth harmonic mixer in realized in the 0.13 ?m Si Ge Bi CMOS process.The measured conversion loss is 21-26 d B within the entire 280-325 GHz frequency band.In addition,we also design two active Gilbert mixers based on requirements of IEEE 802.11aj(45 GHz)standard,Part of the work has been published in IEEE MWCL core journal and IEEE RFIT 2018 international conference,and one invention patent has been filed.(3)Chapter 3 designs and realizes a W-band power amplifier chip and a terahertz frequency doubler chain chip.Test results shows that the PA reaches the highest output power of 11.5 d Bm in 95-96 GHz.Based on the PA research,a frequency doubler is designed and realized.Measurement shows the highest output power reaches 7 d Bm at 164 GHz.In the entire151-191 GHz frequency band,the saturated output power is above 4 d Bm,and the power added efficiency reaches 10.8%.(4)Chapter 4 designs and realizes an automotive MMW radar multi-channel receiver chip in a 0.13 ?m Si Ge process.The key design problem of poor linearity and high NF that are common in the automotive MMW radar receivers is solved.In addition,in the Built-In SelfTest system,an IQ up-converter is designed.Measurement shows high conversion gain,high linearity,high LO-RF isolation,and high image rejection.Part of the work has been published in IET EL.(5)Chapter 5 proposes a high-performance MMIC transceiver and an integrated waveguide module solution for E-band radio channel emulator application.The waveguide module includes a transceiver chip fabricated in a 0.1 ?m Ga As process is developed.The measurement results show that the waveguide module obtain a dynamic operating power range of more than 50 d B in the range of 66 to 76 GHz.The up-down conversion loss of the integrated module in the entire 66-76 GHz band is less than 14 d B.The power consumption of the whole module is 420 m W.This part of the work is published in SCIENCE CHINA Information Sciences.(6)Chapter 6 proposes three schemes of terahertz front-end transceiver chips with integrated on-chip antennas,for the first time,on a low-cost commercial 0.1 ?m Ga As technology,and short-distance wireless transmission test is also carried.The LO chain in the second harmonic mixing scheme is measured with an output power of 12 d Bm at 111.5 GHz.When the whole chip is used in a transmission test,the conversion loss excluding the antenna reaches-17.5 d B at 283 GHz.By introducing a dielectric resonator to greatly improve the radiation efficiency and bandwidth,the on-chip circular patch antenna is measured with 6.3 d B gain at 283 GHz.The entire integrated second-harmonic mixing terahertz front-end chip successfully realize terahertz wireless transmission in a 10 cm short-distance wireless environment.