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radio beam 無線電射束。

radio bearing

Because the processor is fast enough to perform this task many times a second , the array can continually readjust the radio beam as the cell - phone user walks or drives across the array ' s coverage area 因為處理器的速度很快,可在一秒內執行多次工作,所以當行動電話用戶在陣列涵蓋?圍內行走或開車時,陣列可不斷重新調整無線電波束。

And when the array transmits back to the cell - phone user , the processor sends an out - of - phase signal to one of the antennas , generating a radio beam that runs from north to south 當陣列發射訊號給行動電話用戶時,處理器會傳送一個異相的訊號到其中一個天線,產生由北往南的無線電波束。

The array ' s processor can create radio beams pointing in other directions as well by performing more complex mathematical operations on the signals from the two antennas 陣列的處理器也可以對兩個天線的訊號進行更復雜的數學運算,以便針對其他方向產生無線電波束。

An antenna array that is truly smart would be able to aim a radio beam directly at a mobile user instead of choosing a beam that comes relatively close 一個真正聰明的陣列天線,必須能夠直接把波束瞄準行動用戶,而不是選用與用戶較為接近的波束。

Notice that in both these examples the radio beam generated for one cell - phone user does not reach the other 注意,在上述兩例中,針對其中一名用戶產生的無線電波束,并不會抵達另一位用戶的所在位置。

Instead of generating a radio beam , the array creates a “ personal cell ” that can be only centimeters in radius 這種陣列不再制造無線電波束,而是產生半徑只有數公分大的個人單元。

Coded radio beam 編碼無線電波束

Western union installs the first commercial radio beam system 西部聯合電報公司安裝第一個商用無線電波束系統。

Ironically, the detailed reasons as to how the radio beam is produced may not be important astronomically . 具有諷刺意義的是,產生射電波束的詳細原因在天文上,這也許并不重要。

Like the searchlight beam, the radio beam cannot be made very sharp; it tends to spread . 無線電射束也象探照燈的光束一樣,是不能高度集中的;它總要散開。