天線立體方向性圖的測量
MEASUREMENT OF ANTENNA THREE-DIMENSIONAL PATTERN
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摘要: 本文敘述了以太陽為信標,用射電天文法測量天線立體方向性圖的基本原理和方法。該測量方法用總功率輻射計作為接收系統(tǒng),用計算機作為終端數(shù)據(jù)采集和歸算系統(tǒng)。它能實時、快速處理,得到天線立體方向性圖。被測天線口面直徑為20m,波長為17.8cm,可測旁瓣電平約為41dB,精度約為0.6dB。
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關(guān)鍵詞:
- 立體方向性圖; 射電天文; 輻射計
Abstract: The fundamental principles and techniques of radioastronomical method by using the sun in the measurement of antenna three-dimensional pattern are described. And a total radiometer is used for measurement system. Collection and calculation of the data are performed,by the computer. The aperture and operating wavelength of the measured antenna are respectively 20m and 17.8cm. Measured level is estimated to be -41dB, and measured error is about 0.6dB. -
袁惠仁.通信學報,1988,9(6): 64-67.[2]袁惠仁,等著.天線參數(shù)的射電天文測量.北京:電于工業(yè)出版社,1987,89-93.[3]航天部503所,國家衛(wèi)星氣象中心電子部39所.2F CTS00-BG11天饋分機測試結(jié)果.1992-3, 1-35.[4]Yuan Huiren. 30m Antenna Parameters Measurement by Means of Radio astronomical Method Proc. of ISAE 93, Nanjing: 1993, 172-175.[5]袁惠仁,等.通信學報,1983,1(3): 56-60. -
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