加脊加扼流槽圆锥喇叭的实验研究及其应用

An Experimental Study on the Quadruply Ridged Conical Horn Having a Choke and its Applications

提出一种小尺寸加脊加扼流槽圆锥喇叭，其口径尺寸为1.3λ,圆锥段长度仅为1λ,在频度9.32GHz^9.42GHz内具有等化特性，E面和H面相位中心重合，喇叭口面最大相位差<40°。用作F/D0.35抛物面反射器的前馈馈源因其—3dB、—10dB和—20dB的波束宽度较宽而边缘（6/2=71°）馈电电平较低，故能得到较高的增曾和较低的副瓣电平。

The quadruply-ridged conical horn with small size having a choke is presented in this paper.The diameter of the born aperture is 1.3λ.The length of the conical horn is 1λ.In the 9.32GHz^9.42GHz range the horn has identical-20dB beamwidths in the E-plane and Hplan.The phase center coincides in the E-plan and H-plane.The maximum phase difference is no greater than 40° on the born aperture.Becarse the -3dB,-10dB and -20dB beamwidths of the quadraply-ridged conical horn are greater and the parabolic edges(0/2-71°)feed level is low The feed-forward parabolic antenna for F/D=0.35 has greater gains and lower sidelobe levels