Design Of Millimeter Wave Signal Source Based On Voltage Controlled Oscillator And Frequency Multiplication Technology

With the development of science and technology,RF transceiver systems have become more and more demanding on cost,power consumption and integration in recent years,and with the increasing popularity of applications in radar and medical fields,the frequency band has been extended to millimeter waves / terahertz,thus there is a higher standard for the indicator requirements of the signal source.Therefore,designing a high-purity,wide-band,high-stability signal source in the millimeter wave / terahertz frequency band is an important research direction.This paper introduces the research background and significance of the millimeter wave band,expounds the signal source technology and the research status of millimeter wave signal sources at home and abroad in recent years.The theoretical knowledge of voltage controlled oscillator and frequency multiplier are analyzed,and several common methods for realizing circuit oscillation and frequency multiplication are introduced,then the problems encountered in design.Besides,the passive components include on-chip spiral inductors,microstrip lines,coplanar waveguides,and balun analysis and electromagnetic simulation.Finally,based on IHP 130 nm SiGe BiCMOS process,two millimeter wave signal source circuits are designed.The first one is a 140 GHz quadrature voltage controlled oscillator millimeter wave signal source based on voltage controlled oscillator technology,the second one is a 220 GHz millimeter wave signal source based on frequency multiplication technology.For the millimeter wave signal source based on voltage controlled oscillator technology,the design uses two differential colpitts structure voltage controlled oscillator cells to generate quadrature signals through the common mode superharmonic-coupling technology and proposes a method for measuring the phase error of millimeter wave orthogonal signals.The simulation results show,the oscillator tuning range covers 133GHz-150 GHz,the relative tuning range is 12%.When the oscillation frequency is 140 GHz,the output power is 7.35 d Bm,phase noise is-101 d Bc/Hz@10MHz with DC power consumption is 28 m W,chip area is 0.26mm~2.For the 220 GHz millimeter wave signal source based on frequency multiplication technology,the input is an off-chip low-frequency signal source with a frequency of 18.3GHz and a power of 0d Bm.The circuit uses Push-Push structure and uses a quarter-wavelength stub for harmonic suppression,the driver amplifier is used for signal power amplification between stages,the output power is-17.26 d Bm,the harmonic rejection ratio is greater than 15 d Bc,the 3-d B bandwidth is 212.4GHz-246 GHz,relative bandwidth is 14.7%,and the power consumption is 59 m W,the corresponding chip area is 1.52mm~2.