用冷空作為定標(biāo)基準(zhǔn)測(cè)天線增益
MEASUREMENT OF ANTENNA GAIN USING BACKGROUND TEMPERATURE OF SKY AS STANDARD OF CALIBRATION
-
摘要: 本文介紹用天線指向冷空時(shí)的天線噪聲溫度TAN作為定標(biāo)基準(zhǔn),并以射電源為信標(biāo),測(cè)量天線剩余噪聲溫度Tas的基本原理和方法。與用冷、熱負(fù)載為定標(biāo)基準(zhǔn)測(cè)量Tas相比,兩者測(cè)量結(jié)果基本吻合;但該方法具有測(cè)量方法簡(jiǎn)便和測(cè)量設(shè)備簡(jiǎn)單等優(yōu)點(diǎn)。Tas的測(cè)量誤差約為3％。天線增益測(cè)量精度可保持在0.3dB左右。
-
關(guān)鍵詞:
Abstract: The basic principle and method of measuring the antenna excess noise temperature Tas by using the radio stars as calibration are presented in this paper. In this method, the antenna noise temperature TAN is used as a standard of calibration when the antenna points at sky. It was found that the results of measurement using this method agree with that obtained by using liquid nitrogen at low and normal ambient temperature as standard of calibration. The method has advantage of more simplicity of the measurement and equipment. The total error of antenna excess noise temperature obtained by this method could be estimated to be 3%. The error of antenna gain measured is about 0.3%. -
袁惠仁,彭云樓,薛吟章,周風(fēng)安,現(xiàn)代雷達(dá),2(1980), 117.[2]袁惠仁,彭云樓,薛吟章,通信學(xué)報(bào),1(1981), 56.[3]袁惠仁,彭云樓,薛吟章,陳奇波,劉宗祝,楊慶仁,通信學(xué)報(bào),3(1983),45.[4]袁惠仁,彭云樓,薛吟章,魏雙林,周鳳安,應(yīng)用科學(xué)學(xué)報(bào),3(1985)., 249.[5]袁惠仁,彭云樓,薛吟章,天線測(cè)量技術(shù),中國(guó)電子學(xué)會(huì)論文集,1984, 145.[6]A. A. Penzias and R. W. Wilson, Astrophys. J., 142(1965), 419.[7]J. W. Findly, Ann. Rev. Astrophys., 4(1966), 77.[8]D. L. Croom, Proc. IEE, 111(1964), 967.[9]R. Weiss, Ann. Rev. Astrophys., 18(1980), 489.[10]尚瓊珍,胡漢明,李維華,龔元芳,袁惠仁,云南天文臺(tái)臺(tái)刊,1(1986),142. -
計(jì)量
- 文章訪問數(shù): 2145
- HTML全文瀏覽量: 167
- PDF下載量: 467
- 被引次數(shù): 0
下載:
