A High-Intensity Vivaldi Phased Array Antenna at Ka Band

This paper describes a high-intensity phased array antenna at ka band. With the increase of the harsh working environment of the antenna, it is difficult for the microstrip antenna to adapt to the working conditions of these environments due to the influence of harsh weather conditions and complex terrain. The broadband phased array antenna designed in this paper, Vivaldi metal structure is used as the radiation unit of the antenna to enhance the intensity of the antenna, and the power is fed from the bottom plate through SMP. The antenna has a wider bandwidth and a unit gain of 4.3dB. The antenna adopts rectangular array to realize array arrangement, the unit spacing is selected as
$\mathbf{6}\mathbf{mm}\times \mathbf{6}\mathbf{mm}$
, and the number of array elements is 64. which can achieve an angle scanning of 20° in a two-dimensional plane. The amplitude distribution of antenna elements adopts the Taylor's weighted distribution design. By calculations and computer simulation, The maximum gain of the antenna is 21.5dBi, the 3dB beamwidth is about 16 °, the side lobe lever is less than - 26.5dB, and the difference beam null depth is superior to -32db. Which can be very useful for the harsh working environment.