100MW等于多少dbm??? 负100dbm等于多少 毫瓦
100MW\u7b49\u4e8e\u591a\u5c11dbm\u9996\u5148\u8981\u786e\u8ba4\u4f60\u8fd9\u91cc\u7684\u5355\u4f4d\u2018MW\u2019\u662f\u4ec0\u4e48\u610f\u601d\uff1f
\u5728\u7269\u7406\u5355\u4f4d\u7684\u8868\u793a\u4e2d\u6bcf\u4e2a\u5b57\u6bcd\u7684\u5927\u5c0f\u5199\u662f\u7531\u533a\u522b\u7684\u3002\u5c0f\u5199\u7684m\u662f\u4ee3\u8868\u2018\u6beb\u2019=10^(-3)\uff0c\u800c\u5927\u5199\u7684M\u5219\u4ee3\u8868\u2018\u5146\u2019\uff08\u767e\u4e07\uff09=10^6. \u6240\u4ee5\u2018MW\u2019\u548c\u2018mW\u2019\u670910^9\u7684\u500d\u5dee\uff0890db\uff09\u3002
\u76f8\u5bf9\u529f\u7387\uff08\u573a\u80fd\uff09\u5927\u5c0f\u503c\u4e60\u60ef\u4e0a\u4ee5dbm\uff08\u5206\u8d1d\u6beb\u74e6\uff09\u6765\u8868\u793a\u3002
dbm=10\u33d2(P/1mW), 1mW=0dbm;
\u2234100mW=20dbm, 100MW=10^11mW=110dbm
1\u540e\u976213\u4e2a\u96f6\u5206\u4e4b\u4e00\u74e6\uff0c1E-13W
100mW=20dBmdbm=10*log(power/1mW)
dbm=10*log100
=10*2
=20dbm
表示没看懂= =。dbm是神马= =
绛旓細100mW=30+10lg10^-1=20dbm 鍔熺巼涓巇bm鎹㈢畻鍏紡锛歅'dBm=30+10lgP (P:鐡:鍗曚綅涓篸bm)鍒嗚礉姣摝(dBm锛屽叏鍐欎负鈥渄ecibel relative to one milliwatt鈥)涓轰竴涓寚浠e姛鐜囩殑缁濆鍊硷紝鑰屼笉鍚屼簬dB鍙槸涓涓浉瀵瑰笺
绛旓細100mW=20dBm
绛旓細鈭100mW=20dbm, 100MW=10^11mW=110dbm
绛旓細100mW=30+10lg10^-1=20dbm 鍔熺巼涓巇bm鎹㈢畻鍏紡锛歅'dBm=30+10lgP (P:鐡︼紱P':鍗曚綅涓篸bm)鍒嗚礉姣摝(dBm锛屽叏鍐欎负鈥渄ecibel relative to one milliwatt鈥)涓轰竴涓寚浠e姛鐜囩殑缁濆鍊硷紝鑰屼笉鍚屼簬dB鍙槸涓涓浉瀵瑰笺
绛旓細100mW=20dBm 璁$畻鍏紡锛20dBm=10lg锛100mW/1mW锛夈傚叿浣撹鐩栬兘瑕嗙洊澶氬皯璺濈锛屽氨瑕佸拰瑕嗙洊鐜鏈夊叧锛岀┖鏃峰湴鏂30绫-40绫筹紝鍔炲叕妤煎唴涔熷氨10鏉ョ背銆
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绛旓細dBm = 10 * log(mW)鎴杕W = 10^( dBm / 10 )鎵浠ュ簳涓嬭繖浜涗緥瀛愬ぇ瀹跺彲浠ラ獙绠椾竴涓嬶細0 dBm = 1 mW 10 dBm = 10 mW 14 dBm = 25 mW 15 dBm = 32 mW 16 dBm = 40 mW 17 dBm = 50 mW 20 dBm = 100 mW 30 dBm = 1000 mW = 1W ...