Design And Research Of Miniaturized Multi-polarized Antenna

In the increasingly scarce electromagnetic environment,how to improve the communication efficiency and rate in the limited spectrum space has become the research hotspot at this stage.In this paper,several multi-polarized antennas with dual polarization will be designed,which are based on the polarization diversity technique,enhancing the channel capacity,and C-band satellite TV communication applications.And the miniaturization and broadband are used as the design and implementation Direction,in order to better apply to the remote sensing radar and other systems integration.The main contents of this paper are as follows:Firstly,using the annular slot microstrip antenna technology to design a linearly polarized antenna with wideband performance,and then divide the feeder line into another route polarized feeder.And the PIN diode is loaded as a switch to control the polarization state transition between horizontal and vertical polarization.All these will make up a miniaturized dual linearly polarized antenna which works in wideband finally.Secondly,a circularly polarized antenna with a power distribution and a microstrip delay line phase-shift feeding network is designed by using the twin-feed circular polarization mechanism and the caliber coupling feed technology.The main comparison is the direct influence of the feeder feed network on the antenna performance,and introduces the design of the H-shaped slot coupling feed.The same method of loading the PIN tube is used to design a miniature planar linearly-circlarly dual polarized(VP/RHCP)antenna.Then,the structure of the Schiffman wideband phase shifter is used to optimize the coupling line of the microstrip phase shifter by using the odd-even mode analysis.The planar broadband of the step impedance and the fan-shaped resonator is designed to be 90 ° Phase structure.Finally,based on the design of the improved broadband 90 ° function of the phase-shift feeding network,respectively,designed to achieve miniaturization and broadband polarization performance of the linearly-circularly dual-polarizaed(VP/RHCP)antenna and dual-circularly polarized(RHCP/LHCP)antenna.These have convenient processing and single-port integrated input features which can be applied directly to C-band communication systems.