相關(guān)法測天線遠(yuǎn)場二維方向圖
INTERFERENTIAL METHOD FOR TWO-DIMENSIONAL FAR-FIELD PATTERN MEASUREMENT
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摘要: 正 相關(guān)法測天線遠(yuǎn)場二維方向圖的原理見文獻(xiàn)[1,2]。本文介紹我們在176MHz和232MHz兩個頻率上,對北京天文臺密云綜合孔徑射電望遠(yuǎn)鏡天線(MSRT系統(tǒng))進(jìn)行的遠(yuǎn)場方向圖測試情況。根據(jù)測試結(jié)果計算了天線方向性系數(shù)、有效面積、表面利用系數(shù)以及天線增益系數(shù)。并與通過傅里葉變換公式計算的天線方向圖作了比較。 圖1是實測系統(tǒng)方框圖。被測天線T1和參考天線T2同時接收輻射源S的信息,然后經(jīng)過前置放大器進(jìn)入相關(guān)接收機(jī)進(jìn)行相關(guān)處
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關(guān)鍵詞:
Abstract: We presented the measurements of two-dimensional far-field pattern of antennas, which are going to be used in Miyun synthetie-aperture radio telescope. The patterus were measured by means of interferential method with the quiet sun. The measured results were compareal with the calculated ones. -
P. G. Smith, IEEE Trans. on AP, AP-14(1966), 6.[2]J. W. M. Baats. IEEE Trans. on AP, AP-21(1973), 461.[3]王綬琯,北京天文臺密云綜合孔徑設(shè)計方案(內(nèi)部資料).[4]林昌祿,國外電子技術(shù),1978年,第11期,第55頁.[5]W. N. Christiansen and J. A. Hoghom著,陳建生譯,射電望遠(yuǎn)鏡,科學(xué)出版社,1977.[6]Н.Т.Бова講,南京大學(xué)物理系天線教研組譯,超高頻天線,人民教育出版社,1959. -
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