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本文包括对一种特殊的流线型金属天线罩探索和研制的成果,制造方法以及测量的传输性能。测量结果证实,流线型金属天线罩可具有高的天线罩传输性能。本文介绍的圆锥形金属天线罩长度为6英尺4英寸,底部直径为25.5英寸。对这种金属天线罩专门设计的谐振开槽表面由90%的金属组成,而且,对于工作频带内的频率,在一宽的扫瞄角范围上,这种天线罩对任何极化的信号都满足传输要求。在8.9GHz 的谐振频率上,这种天线罩引入小于0.5db 的信号衰减和小于2毫弧度的瞄准误差。一种可工作在窄频带的金属天线罩已经做成,在200MHz 的频带内,测量的插入衰减及瞄准误差分别为工1db 及6毫弧度。
This article includes the results of exploration and development of a special streamlined metal radome, method of manufacture and measurement of transmission performance. The measurement results confirm that the streamlined metal radome can have a high radome transmission performance. The conical metal radome described in this article has a length of 6 feet 4 inches and a bottom diameter of 25.5 inches. The resonant slotted surface specifically designed for such metal radomes consists of 90% metal and for radiated frequencies in the operating band, over a wide range of sweep angles, Meet the transmission requirements. At a resonant frequency of 8.9 GHz, this radome introduces a signal attenuation of less than 0.5 dB and aiming error of less than 2 milliradians. A metal radome that can operate in a narrow frequency band has been built to measure insertion attenuation and aiming error of 1 dB and 6 milliradians, respectively, in the 200 MHz band.