摘要
波纹喇叭是一种高效率馈源 ,它的方向图具有低旁瓣、轴对称、交叉极化小等一系列优点 ,因而得到广泛的应用。波纹喇叭辐射方向图一般是采用口面场积分方法得到的 ,但计算速度较慢。在这里介绍一种用Gaussian Laguerre模的Fresnel积分变换计算波纹喇叭的远场及近场方向图的方法 ,比采用口面场积分速度快得多 ,而且还可以很方便地求出波纹喇叭的相位中心 ,因此这是一种十分有效和实用的方法。
Corrugated horn is a kind of high efficiency feeders. Its pattern has a series o f excellences, such as low side lobe, axial symmetry, little cross polarization, etc, therefore it is used in wide range. Usually, the pattern of corrugated horn is calculated with aperture integral, but the calculating speed is lower. In th is paper, we introduce a manner of calculating the far-field and near-field an tenna pattern of corrugated horns with Fresnel integral transform of the Gaussia n-Laguerre modes, it is more quickly than the manner that use aperture integral , in addition, with this manner we can get the phase centre of corrugated horns very conveniently, therefore it is a quite effective and useful manner.
