Description: 射電望遠鏡接收來自太空的無線電波。 根據觀測波長的不同，有的射電望遠鏡呈拋物線形狀，類似於衛星天線，焦點處有一個接收器，也有的是金屬棒狀，有時被稱為偶極子天線。接收到電磁信號後，信號會被放大並通過計算機進行處理。射電望遠鏡可以是一個碟形天線，也可以是多個天線連接在一起形成的干涉儀。在干涉儀中，一臺名為相關器的特殊計算機將來自不同射電望遠鏡的信號組合成新的信息，然後將信息處理成圖像。射電望遠鏡主要觀測無線電波，頻率範圍約為 30 兆赫茲到 300 千兆赫茲，或波長為 10 米到 1 毫米。各個望遠鏡和接收器都針對這一波段內的特定區域進行了優化。有些射電天線經過優化，可以觀測到電磁波譜中被稱為亞毫米波的一類波長稍短的電磁輻射。

Related Terms:

• 電磁輻射
• 射電天文學
• 射電波

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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