Ptt 大爆卦 | dbm強度 - 前往 http://120.101.8.4/lyhsu/post/..%5Cdatabase%5Cgrade%5C%E9%82%B1%E5%BB%BA%E6%96%87%5C%E6%89%8B%E6%8C%81%E8%A3%9D%E7%BD%AE%E5%A4%A9%E7%B7%9A%E8%A8%AD%E8%A8%88Ch2-RF%E6%A6%82%E5%BF%B5%E8%88%87%E5%A4%A9%E7%B7%9A.pdf

你即將離開本站

並前往http://120.101.8.4/lyhsu/post/..%5Cdatabase%5Cgrade%5C%E9%82%B1%E5%BB%BA%E6%96%87%5C%E6%89%8B%E6%8C%81%E8%A3%9D%E7%BD%AE%E5%A4%A9%E7%B7%9A%E8%A8%AD%E8%A8%88Ch2-RF%E6%A6%82%E5%BF%B5%E8%88%87%E5%A4%A9%E7%B7%9A.pdf

第2章RF的基本觀念與天線

訊號(signal)的強度. dB = 10 log. 10. (P o. /P i. ) P in. =1 mW. Power gain = 10 倍. P out. =1 mW*10 =10 mW. Power gain = 10 dB. P out. =0dBm+10 dB=10 dBm.

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