dbºÍw»»Ë㹤¾ß
¹¦ÂÊ·øÉäËðºÄÖÐ, dBºÍWÔõÑù»»Ëã?
1. dBwµ½WµÄ»»Ë㣺1WµÈÓÚ0dBw¡£2. dBmµ½WµÄ»»Ë㣺1mWµÈÓÚ0dBm£¬Òò´Ë1WµÈÓÚ1000mW£¬¼´30dBm¡£¹¦Âʵ¥Î»ÓëP£¨ÍßÌØ£©µÄ»»Ë㹫ʽΪ£º3. dBm = 30 + 10lgP £¨P:Íß...
¹¦ÂÊ·øÉäËðºÄÖÐDBºÍWµÄ»»Ë㹫ʽÊÇʲô?
1. dBwµ½WµÄ»»Ë㣺dBw = 10 * log10(¹¦ÂÊÖµ/1W)»»Ë㹫ʽ£º1W = 0dBw Òò´Ë£¬Èç¹ûÒÑÖª¹¦ÂÊֵΪP£¨ÍßÌØ£©£¬ÔòdBw = 10 * log10(P)2. dBmµ½WµÄ»»Ë㣺dBm = ...
ÈçºÎÀí½âdB,dBm,Ôõô½øÐÐÔöÒæ»»Ëã?
dBmÊǹ¦Âʵ¥Î»£¬0dBm=1mW,10dBm=10mW; power(dBm)=10*log(power(W)*1000)¡£
¹¦ÂʼÆË㵥λdbºÍdbmÓÐʲôÇø±ð,Ôõô»»Ëã?
»»Ë㹫ʽ£ºµçƽ£¨dBm£©=10lgw5W ¡ú 10lg5000 = 37dBm 10W ¡ú 10lg10000 = 40dBm 20W ¡ú 10lg20000 = 43dBm ´ÓÉϲ»ÄÑ¿´³ö£¬¹¦ÂÊÿ...
¹ØÓڰٷֱȺÍdBÖ®¼äµÄ»»ËãÎÊÌâ - Êý¾Ý½á¹¹ÓëËã·¨ - CSDNÎÊ´ð
Ê×ÏÈ,ÎÒÃÇÐèÒªÁ˽âÒ»¸ö³£¼ûµÄ±ÈÀý¹Øϵ:1°Í=20 dB,¼´1 dB = 1/20 * 10^(-14) W/m¡£ Æä´Î,ÎÒÃÇ¿ÉÒÔʹÓÃÒÔϹ«Ê½½«°Ù·Ö±È(%)ת»»Îª...
Çó¹¦ÂÊ·øÉäËðºÄÖÐDBºÍWµÄ»»Ë㹫ʽ
¹¦Âʵ¥Î»ÓëP£¨ÍßÌØ£©Ö®¼äµÄ»»Ë㹫ʽΪ£ºdBm=30+10lgP (P:Íß )¡£DBÊÇÒ»¸ö´¿¼ÆÊýµ¥Î»£¬Æ䶨ÒåΪdB = 10logX¡£DBµÄÒâÒåÔÚÓÚ¼ò»¯±íʾһ¸ö·Ç³£´ó»ò·Ç³£Ð¡µÄÊý¡£ÀýÈ磬X...
dbÓëwµÄ»»Ëã
dbºÍWµÄ»»Ë㣺1W=0dBw=30dBm¡£dBwÊÇ10*log£¨¹¦ÂÊÖµ/1W£©£¬dBmÊÇ10*log£¨¹¦ÂÊÖµ/1mW£©£¬ËùÒÔ1W=0dBw=30dBm¹¦µÄÊýÁ¿Ò»¶¨£¬Ê±¼äÔ½¶Ì£¬...
ÌìÏßÀïµÄdBi ÊÇʲôÒâ˼?ºÍdB¡¢dBm¡¢dBd¡¢dBcÓÐʲô...
dBm¡¢dBw¾ÍÊÇ°ÑdB¹«Ê½ÖеIJο¼¹¦ÂÊP0·Ö±ð±ä»»³ÉÁ˲ο¼1 mW¡¢1 W£º1 mW¡¢1 W¶¼ÊÇÈ·¶¨µÄÖµ£¬Òò´ËdBm¡¢dBw¶¼¿ÉÒÔ±íʾ¹¦Âʵľø¶ÔÖµ¡£Ö±½ÓÉÏ...
¹¦ÂÊ·øÉäËðºÄÖÐDBºÍWµÄ»»Ë㹫ʽÊÇʲô
dBºÍWµÄ»»Ë㹫ʽÊÇ£º¹¦ÂÊ£¨dB£©= 10 * log10£¨¹¦ÂÊ£¨W£©£©¡£·´Ö®£¬¹¦ÂÊ£¨W£©= 10^(¹¦ÂÊ£¨dB£©/10)¡£¹¦ÂÊÒÔ·Ö±´£¨dB£©Îªµ¥Î»Ê±£¬±íʾµÄÊǹ¦ÂʵÄÏà¶Ô´óС£¬¶øÒÔ...
Ò»Îĸ㶮dB¡¢dBm¡¢dBwºÍwµÄ»»Ëã¹Øϵ
= 6.25 W ¶ÔÓÚdBwÓëWµÄ»»Ë㣬¹ØϵÊÇ£º- 0 dBw = 10 log(1 W) = 10 log(1000 mW) = 30 dBm - Èç¹û¹¦ÂÊPΪ1 W£¬ÔòÕÛËãΪdBwºóΪ0 dBw¡£×ܽáÀ´Ëµ£¬dB...