关键词: 动中通, 低剖面, Ku波段, 双极化, 平板天线

Abstract:

Traditional parabolic antenna has high profile, while high speed aircraft need low profile antenna to reduce the wind resistance. A kind of Ku band “Satcom on the Move” flat antenna is designed, which has the advantage of low profile, low wind resistance and good performance. The antenna array is designed to be a 35:1 ratio rectangle which can reduce antenna height. By using high efficiency radiation unit, the antenna array is connected with strip line and waveguide which have low insert loss. The phase controlled beam scanning technique is used for azimuth tracking and program tracking for elevation. The result shows that the antenna has a height of lower than 280mm, the antenna gain is better than 33dB, and then tracking accuracy is controlled in 05dB.

Key words: satcom on the move, low profile, Ku band, dual polarization, flat antenna