Research On High Efficiency Continuous Class F Power Amplifier And SIW Cavity-backed Array Antenna

This thesis focuses on highly-efficient broadband continuous class F RF power amplifier technology and designs work in the band of 1.1-1.7GHz about Compass satellite navigation system.At the same time,in order to meet consumer demand for high-speed and high-capacity transmission,the 60 GHz cavity-backed array antenna based on substrate integrated waveguide(SIW)in low-temperature co-fired ceramic(LTCC)process is fabricated.SIW function as the conventional metal waveguide,thus it not only maintains the characteristic of traditional metal waveguide,such as high quality factor,low insertion loss,low radiation and so on,but also has the properties of low profile,low cost and easy integration with planar circuits,etc.First,based on reading a large number of literatures,the highly-efficienct broadband continuous class F research achievement in recent years is understanded.The research situation of substrate integrated waveguide cavity-backed antenna is summarized and the development trend of millimeter wave antenna is also discussed.Secondly,the power transistor,performance of the amplifier and switch-mode RF power amplifier are introduced.By reviewing the relevant literatures,the current method of designing high efficiency continuous class F RF power amplifier is presented.The effect of the output nonlinear capacitor on the efficiency of the continuous class F power amplifier is simply analyzed.Then,the ADS software is used to design the highly-efficient broadband RF power amplifier about Compass satellite navigation system in the band of 1.1-1.7GHz by using Cree company GaN HEMT products CGH40010 F.The power amplifier works under Vds=28V,Vgs=-2.7V.The measured results meet the design goal of more than 65% average drain efficiency in the bandwidth.At the end of this thesis,the parameters of antenna,microstrip feed,SIW and LTCC are introduced.Then,the HFSS software is used to design the SIW cavity-backed array antenna with the bandwidth of 5GHz.The simulation results show that the return loss in 2x2 array antenna is S11<-15 dB and the gain is 10.9dBi in the range of 56.57 GHz ~ 62.13 GHz.The return loss in 4x4 array antenna is S11 <-15 dB and the gain is 15.1dBi in the range of 57.8GHz ~ 62.8GHz.Finally,the 2x2 array antenna is processed.