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随着射电天文学、雷达技术、空间探测和卫星通讯等的发展,大、中型和多种高效率的小型抛物面天线不断出现,如何精确地测量这些天线的参数,特别是增益,是一个无线电工程尚未完满解决的经典课题。对于小型抛物而天线,经典的方法需要一个精心设计和加工的标准天线;同时为了满足远场条件和消除地而等影响,必须把信号源放在高山上或专用铁塔上。这样做化的人力和物力是相当可观的,而且由于一些难以估计的因素,增益测量精度一般不好于±0.5分贝。我
With the development of radio astronomy, radar technology, space exploration and satellite communications, the small, medium and high efficiency small parabolic antennas are emerging. How to accurately measure the parameters of these antennas, especially the gain, is a radio project that has not yet been completed Completely solve the classic topics. For small parabolic antennas, the classic approach requires a well-designed and machined standard antenna; at the same time, the signal source must be placed on a mountain or a dedicated tower to meet the far-field conditions and eliminate the effects of ground. The human and material resources to do this are considerable, and because of some hard-to-estimate factors, gain measurement accuracy is generally not better than ± 0.5 dB. I