Research On Millimeter-wave Active Frequency Multiplication And Mixing Receiving Technology

Due to the short-wavelength and wide-band characteristics of millimeter wave,it has great application value in the fields of communication,radar,radio astronomy,remote sensing,etc.Millimeter wave technology has become a hot field of research in recent years,and the demand for millimeter wave sources in millimeter wave systems also increasing day by day.With the help of a millimeter wave frequency multiplier,a millimeter wave frequency source with better frequency stability and phase noise characteristics can be better obtained.Among them,the loss of the active frequency multiplier is small,and it is even possible to realize the conversion gain.Thanks to the superiority of active frequency multiplication technology in frequency multiplication gain,it can effectively reduce the design index and difficulty of millimeter wave sources.This paper investigates the development and basic principles of millimeter-wave ac-tive frequency doublers.In order to explore the extreme performance of millimeter-wave active frequency doublers based on hybrid integrated design,a Ka-band active frequency doubler,a U Band active double frequency circuit and a V band active frequency triple circuit.Among them,the Ka-band active double frequency circuit has better performance,the frequency conversion loss in the frequency of the frequency multiplier output 37-42GHz is less than 10dB,the maximum frequency doubling gain is 0.2dB,and the max-imum output power is 2.2dBm.U-band active double frequency and V-band active triple frequency test performance is not ideal.Through detailed analysis,it may be because the transistor package is equivalent to a low-pass filter,and its cut-off frequency is lower than the U-band double frequency output frequency.And based on the Ka-band active frequency doubler circuit,the collaborative design of the frequency multiplier and the antenna is further explored and studied.For the ap-plication of millimeter wave short-range communication and radar transmission system,a multi-channel active frequency doubler circuit and Ka-band are designed.Microstrip series-fed antenna and multi-channel active frequency doubling transmitter.The antenna gain is up to 14dBi,and the multi-channel frequency doubling transmitting circuit and the subject group's second harmonic receiving mixer are j ointly tested for receiving and send-ing.Its maximum operating distance reaches 178m.It can be applied to short-distance communication application scenarios such as the Internet of Things,WiFi,and Bluetooth.Finally,the K-band oscillator circuit and the K-band self-oscillation mixing circuit were simulated and developed.The oscillation frequency of the self-oscillation mixing is about 24GHz,and the average gain of mixing in the 1GHz working bandwidth is 2.2dB.This design provides a reference idea for the reception of multi-channel frequency doubling transmission.