Development Of TE₁₀^?-TE₀₁^? Converter And Power Combiner

Relativistic electron-beamed microwave devices have high peak power of microwave pulse power due to the high voltage and large current of relativistic electron-beamed devices,which currently exceed the level of tens of gigawatts.High pulse power requires power distribution in applications.The power divider is a commonly used device in microwave passive systems that can divide the energy of one input signal into multiple signal energy according to the engineering demand index.The reverse use of the power divider can combine several scattered energy at the same time.According to materials,common microwave power dividers include microstrip power dividers,waveguide power dividers and substrate waveguide power dividers;among them,microstrip power dividers are small in size,compact in structure,and cost-effective.But its bandwidth is narrow,power capacity is small,and insertion loss is large.The waveguide power divier is relatively large,but its excellent power and bandwidth characteristics make it widely used in microwave equipment such as broadband wireless communications,high-power transmitters,array antenna feed networks,phased array radars,and power amplifiers.And there are also great applications in the millimeter wave frequency band.In the design of millimeter wave frequency band power combiner/divider,because the millimeter wave loss is high,the waveguide spatial power combining method can be used.In addition,for power combining technology,the power distribution amplitude and phase are also required to have good consistency.The power divider based on the coaxial waveguide form not only meets the relevant indicators,but also has the characteristics of broadband,low loss,and easy processing.Compared with the existing power distribution The device has unparalleled advantages.Therefore,this article hopes to develop a Ka-band TE₀₁power divier/combiner,which has the characteristics of wide frequency band,high conversion efficiency,and the structure is easy to process.This article mainly carried out the following work and achieved related results:1.The design and theory of arbitrary N path power divider.The theory of radial power distribution network is introduced and the formula for calculating the transmission performance of the power divider is given.The design theory of the arbitrary N path to the power divider of the coaxial waveguide is discussed.A number of power divider examples are designed and simulated based on theoretical guidance The transmission performance of the power divider is verified,and it is proved that the design theory of any N path to the power divider is feasible,and the designed device can meet the needs of the project.Subsequently,the performance of more aspects of the power divider is evaluated,focusing on the change of the synthesis efficiency of the device when the input signal amplitude is inconsistent when the power divider is used as a combiner,and the previous design example is used to verify.Considering that the number of combined channels N of this device may be large enough,a 36-channel example was designed for verification,and considering that a large N would bring the problem of incompact structure of the device and the port cannot be matched with the standard device,a transition was designed.Segment structure and simulation optimization.2.In order to test the transmission performance of any N-way coaxial radial power divier,a four-way power divier back-to-back test model is designed and optimized.In addition to the power divier mentioned above,it is designed for testing.The power distribution network includes E-plane T-sections,curved waveguides and other devices.The matching optimization of the structural design of the above-mentioned devices is completed,and the possible transmission loss is reduced.A new matching structure of the coaxial radial power divier is proposed.In order to eliminate the discontinuity at the bottom of the coaxial waveguide and further improve the matching,the better transmission parameters are finally obtained,which can be used for processing and testing.3.Processing test of four-way coaxial radial power divier.Draw the four-way model processing assembly drawing and perform block processing,and assemble and fix the processing devices.In the laboratory,the vector network analyzer is used to build a test platform,and the processed power divider samples are tested back to back.The s11 and s12 test results are obtained through the vector network analyzer and compared with the simulation.The results show that although the test results are in error,the overall difference is The simulation results are in good agreement.