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ImpeRFections

  • 優化輸電線路 精確測量電壓駐波比(VSWR)

    Abstract: Impedance mismatches in a radio-frequency (RF) electrical transmission line cause power loss andreflected energy. Voltage standing wave ratio (VSWR) is a way to measure transmission line ImpeRFections. Thistutorial defines VSWR and explains how it is calculated. Finally, an antenna VSWR monitoring system is shown.

    標簽: VSWR 輸電線路 精確測量 電壓駐波比

    上傳時間: 2013-10-19

    上傳用戶:yuanwenjiao

  • RF ImpeRFections

    The unguided transmission of information using electromagnetic waves at radio frequency (RF) is often referred to as wireless communications, the first demonstration of which took place at the end of the 19th cen- tury and is attributed to Hertz. The technology was, shortly thereafter, commercialised by, amongst others, Marconi in one of the first wire- less communication systems, i.e., wireless telegraphy. In the first half of the 20th century the technology was developed further to enable more than the mere transmission of Morse code. This first resulted in uni- directional radio broadcasting and several years later also in television broadcasting.

    標簽: ImpeRFections RF

    上傳時間: 2020-06-01

    上傳用戶:shancjb

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