A Special-shaped Structure of A Low-profile Single-pulse Array Antenna
This paper proposes a low profile monopulse array antenna with an irregular structure ap-plied in the Ku band.The array antenna consists of a metal open waveguide,a quarter coupled cav-ity,and a single ridge waveguide unequal power division network.Design a fully parallel fed broad-band,high gain radiation structure based on an open waveguide;The array antenna has four sets of small arrays and four input ports,which achieve the generation of sum and difference beams in the azimuth and elevation planes.To support practical engineering needs,the design is an array topology structure with irregular apertures.To meet installation requirements,the profile height is only 9 mm.The HFSS simulation results show that the coverage bandwidth of the antenna array with return loss less than-10 dB is 15.3 GHz-22 GHz,the maximum gain of the antenna within this bandwidth is 26.8 dBi,and the aperture efficiency can reach 85%.
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