Rearch On W-band Planar Dual-Polarization Slot Antenna Array

In modern warfare,precision-guided weapons have become one of the major means of warfare and are seen as an important factor influencing the changes in the war situation.Due to the complexity of the battlefield environment and the ever-increasing ability of opto-electronic countermeasures,the single guidance model has been unable to meet the current guidance needs.Multi-mode composite guidance technology has all-weather combat,guidance accuracy,anti-interference ability and other advantages,has become an important research for precision guidance technology.The development of microwave integrated circuit technology and terahertz technology and the improvement of polarization information processing theory make it possible to successfully develop the millimeter wave multipolarization radar used in the terminal guidance technology.The millimeter wave multipole radar has the advantages of higher angle measurement accuracy,stronger target recognition ability to meet the multi-mode composite guidance system requirements.The millimeter-wave dual-polarization antenna is the basis for the detection and extraction of the fully-polarization information in a radar system.Therefore,it is of great significance to study the millimeter-wave dual-polarization antenna technology.In this paper,based on the application background and system requirements,combined with multi-mode co-platform multi-caliber composite program,carried out a W-band planar dual-polarization antenna.Compared with the commonly used high-frequency reflector antenna,the planar antenna has a low profile,easy integration.Although the low-band dual-polarization antenna technology has matured,due to the manufacturing process and processing costs,W-band planar dual-polarization antenna still has no mature solution,so the urgent need to carry out relevant research.A W-band dual-polarization fully-fed slot antenna based on TM₂₁₀ resonant mode is proposed.The antenna consists of a"crisscross"radiating slot,an air cavity,and a double-layer substrate integrated waveguide feed network.In the array layout,an asymmetrical"H"power divider feed structure is used,and the dual polarization full-fed network is implemented by only using a double-layer dielectric substrate.Combined with the antenna manufacturing process and error analysis,the 8×8 dual-polarization antenna array with optimized design and processing test is more than 4GHz,with gain greater than 23d Bi,radiation efficiency greater than 35%,cross-polarization level better than 30d B.It has the advantages of simple structure,low profile and low cost.Based on the8×8 dual-polarization sub-array constructed center aperture circular aperture antenna array simulation performance is excellent,can meet the multi-mode composite terminal guidance system requirements.