New Waveguide Splitter

The power distributor is a common device in a microwave passive system which can allocate the input signal energy of the whole way according to the engineering requirement index to the energy of the multi-channel signal.It can be used in phase shifter,power dispatcher,t-connector of duplexer and multi-aperture slot coupler,and can also be used for the frequency signals distribution in satellite receivers connected to antennas.In wireless communication,the output power of a single solid state device is limited with the increase of frequency,and power allocator can be used to remedy this limitation.The anti-use of power allocators can combine several scattered energies together to achieve the purpose of high power output.There are many kinds of power dividers.According to the material,the common microwave power components have microstrip power points,waveguide power separators and substrate waveguide power integrators;The advantages of microstrip power divider are small in size,compact in structure and cost-effective,but the disadvantage are narrow band,small power capacity and large insertion loss.And waveguide power splitters volume is relatively large,but the excellent features in power and bandwidth of make it widely used in broadband wireless communication,network,high-power transmitter,antenna array feed phased array radar and microwave equipment such as power amplifier,and also has a great application in millimeter wave band.In actual project use,we not only require the bandwidth of the power splitter to improve our frequency band utilization;Moreover,the power divider is required to have good reflection coefficient,isolation degree and consistency in all aspects.The power divider can be measured by many parameters.Here are a few examples that we often use: power splitters input port reflection coefficient,the margin of power balance between the output port,power capacity,insertion loss and isolation,the phase difference between output ports and device size and other technical indicators.The structure of this thesis is divided into six chapters.The first chapter introduces the various aspects of the power divider and the basic theoretical knowledge,and summarizes the main work of the thesis at the end of the chapter.The second chapter introduces some theories,on the basis of the theory to explore possible architecture model of the power dividers,including some theories that reduce the reflection coefficient,increase transmission capacity,improve the device compact and increase the bandwidth.The third chapter,the front is a theoretical knowledge of simple port device,the following is to design a new type of a four waveguide power splitters according to the theories and models of simple port devices,the power dividers index roughly: 4 to 6 GHZ,40% relative bandwidth,the reflection coefficient is lower than 20 db,and compact structure.The fourth chapter design the structure of the two power splitters back to back,considereing the problem of processing test and actual application on the basis of former chapters,the structure is a ridge waveguide microstrip-ridge waveguide.The two power dividers are connected with microstrip line,one for power synthesis,the other for power distribution.The fifth chapter depend on the accurate simulation design result of the previous chapter to draw the engineering drawing,send the engineering drawing to merchant to processing,and test the result of the device.The sixth chapter include the summary and the outlook,this chapter is a general overview,it points out the advantages and disadvantages of the device and the direction of efforts.