摘要
本文首先应用数值积分方法求解三模方角锥喇叭的辐射场分布，以两主平面方向图差趋近零为判据，确定模比取值区间为０．６８～０．７３．以求解模匹配矩阵方程的方法，较为准确地获得变截面处的模比和相位，然后对通常运用的无限长角锥波导的传播常数公式进行修正，计算基模与ＴＥ１２／ＴＭ１２模在喇叭口处的相位差，最后将理论计算与实验进行了比较，并讨论了展宽频带的途径．
On the basis of the difference of the patterns in two principal planes of a multimode pyramidal horn that are predicted by numerical method,the mode ratio is determined to be inthe range from 0. 68 to 3. 73. By means of solving a set of mode matching matrix equations,themode ratio and phase at a E-plane symmetrie step in a rectangular waveguide are accurately obtained. The usually used formula of propogation constant of an infinite extension taper rectangularwaveguide is revised so that the phase difference between TE10 and TE12/TM12 modes at the hornaperture can be predicted more reasonably. The results from theoretical calculation and experimentare compared,and the ways to broaden the band are discussed.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1997年第6期81-84,共4页
Acta Electronica Sinica
