一、序言工作于1500MHz左右,口径1.5米地面自跟踪反射镜遥感天线,如采用喇叭作馈源,由于它的体积过于庞大,这是不合适的,所以,我们选用了阿几米德螺旋双模自跟踪馈源。由于馈源采用阿几米德平面螺旋作辐射器,以及采用了对称带线的和差网络,因而馈源具有体积小,重量轻、性能稳定等特点。该方案对线、同极化均可实现自跟踪,其电轴稳定性与比较器后相移无关,因而电轴稳定性好,并且在和臂通道或者差臂 First, the preamble work in about 1500MHz, 1.5 meters in diameter from the ground self-tracking mirror remote sensing antenna, such as the speaker as a feed, because of its size is too large, it is not appropriate, so we use the Archimedes spiral dual mode Self-tracking feed. Due to the use of Archimonde plane helix as the radiator and the symmetric stripline sum-difference network, the feed has the characteristics of small size, light weight and stable performance. The program of the line, the same polarization can be achieved self-tracking, the stability of the electric axis and the comparator has nothing to do after the phase shift, and thus the stability of the electric axis, and the arm channel or poor arm