ÎÊÌâÒÑ¿ªÆô (ÆÕͨÎÊÌâ)
dBºÍdBmµÄ¹Øϵ
ÈçÌ⣬˵˵ÕâÁ©µÄ¹Øϵ£¬¼ÆË㷽ʽµÈ£»
ÀýÈ磺10dBm + 10dB=£¿
10dBm + 10dBm=£¿
˵һÏÂÊÇÔõô¼ÆËãµÄ£¬Ð»Ð»¡£
ÌáÎÊÕß: yn06260318  ÌáÎÊʱ¼ä: 2013-11-08    
 
  ÎÒÒª»Ø´ð£º
 

  ÇëÏÈ µÇ¼ »ò ×¢²á ÔٻشðÎÊÌâ

¸ü¶à dbm Ïà¹ØÎÊÌâ
ÎÊÌâ´ð°¸ ( 7 )

ÕâÊǸöÀÏÎÊÌâÁË£¬ÀàËÆÓÚʱ¼äºÍʱ¿ÌµÄ¹Øϵª1fkjhK:JFD(±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
dbÊǸöÏà¶ÔÁ¿354afd5aK:JFD()$±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
dbmÊ®¸ö¾ø¶ÔÁ¿Ò²f12K:JFD±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
Â¥ÉϽâ´ðµÃºÜÏêϸÁËfads²»21fds3K:JFD()$#_*(±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
itre43289Î÷K:JFD()$#_*±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ

»Ø´ðÕߣº uuonline     »Ø´ðʱ¼ä£º2013-11-08 13:24    

8        5        


¼òµ¥µÄ˵  30dBm=1W   ¼Ó¼õ3dBm    Ï൱ÓÚ*2»òÕß/2(W)
   ¼Ó¼õ10dBm   Ï൱ÓÚ*10»òÕß/10(W)434321%$K:JFD()$±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ


»Ø´ðÕߣº 252256946     »Ø´ðʱ¼ä£º2013-11-08 13:27    

8        4        


˵µÄ¶¼±È½ÏÂÒ£¬ÎÒÀ´ºÍÂ¥Ö÷ÞÛÒ»ÞÛ£º%#*(ÎÒK:JFD(±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
 
1¡¢dBmÊǹ¦Âʵĵ¥Î»£¬ÊǸö¾ø¶ÔÖµ£¬dBm=10*log£¨¹¦ÂÊ/1mw£©¡£($(Ŷ*&#%K:JFD()$#±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
±ÈÈç˵£¬1W»»ËãΪdBm£¬¾ÍÊÇ10*log£¨1W/1mw£©=10*log1000=30dBm¡£5%#(ô$*@K:JFD()$#±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
  af12zK:JFD±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
2¡¢dBÊÇÒ»¸ö±íÕ÷Ïà¶ÔÖµµÄÖµ£¬´¿´âµÄ±ÈÖµ£¬Ö»±íʾÁ½¸öÁ¿µÄÏà¶Ô´óС¹Øϵ£¬Ã»Óе¥Î»£¬µ±¿¼ÂǼ׵ŦÂÊÏà±ÈÓÚÒÒ¹¦ÂÊ´ó»òС¶àÉÙ¸ödBʱ£¬°´ÏÂÃæµÄ¼ÆË㹫ʽ£º10lg£¨¼×¹¦ÂÊ/ÒÒ¹¦ÂÊ£©wioK:JFD()$#_±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
¾ÙÀý£º¼×¹¦ÂʱÈÒÒ¹¦ÂÊ´óÒ»±¶£¬ÄÇô10lg£¨¼×¹¦ÂÊ/ÒÒ¹¦ÂÊ£©=10lg2=3dB¡£Ò²¾ÍÊÇ˵£¬¼×µÄ¹¦ÂʱÈÒҵŦÂÊ´ó3 dB¡£·´Ö®£¬Èç¹û¼×µÄ¹¦ÂÊÊÇÒҵŦÂʵÄÒ»°ë£¬Ôò¼×µÄ¹¦ÂʱÈÒҵŦÂÊС3 dB¡£ 3s1fdK:JFD±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
 
3¡¢Ò»¸öÊÇÏà¶Ôµ¥Î»£¬Ò»¸öÊǾø¶Ôµ¥Î»£¬Á½Õß²¢ÎÞ¾ø¶Ô¹Øϵ¡£fd3s1fdÖª1K:JFD()$#_±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
 
4¡¢Õë¶ÔÂ¥Ö÷Ìá³öµÄÎÊÌ⣺@s4fads13¶«K:JFD()$#_*±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
10dBm + 10dBm£¬Õâ¸ödBmÊǾø¶Ô¹¦ÂÊת»»£¬Ïà¼ÓʱÐèÒª»»ÎªmwÔÙ¼ÆËã¡£
10dBm»»ËãΪmw¾ÍÊÇ10mw£¬10dBm + 10dBm=10mw+10mw=20mw£¬ÔÚ»»ËãΪdbm£¬¾ÍÊÇ13dBm£»*(&#*($(ÅK:JFD()$#±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
 
10dBm + 10dB£¬ÕâºÜ¼òµ¥£¬¾ÍÊÇÔÚ10dBmµÄ¹¦ÂÊÉÏ£¬Ïà¶ÔÔÙ¼ÓÉÏ10¸ödB£¬ÄÇô¾ÍÊÇ20dBm£»oK:JFD()$#_*(±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
 
Ï£ÍûÄܰﵽ¥Ö÷

»Ø´ðÕߣº OscarDon     »Ø´ðʱ¼ä£º2013-11-08 18:14    

7        6        


Ò»¸öÊÇÏà¶Ôµ¥Î»£¬Ò»¸öÊǾø¶Ôµ¥Î»£¬Á½Õß²¢ÎÞ¾ø¶Ô¹Øϵ¡£«oitre4K:JFD()±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ

»Ø´ðÕߣº Troy     »Ø´ðʱ¼ä£º2013-11-09 04:35    

7        6        


dB£¬dBm ÒâÒåÆäʵÔÙ¼òµ¥²»¹ýÁË£¬¾ÍÊÇ°ÑÒ»¸öºÜ´ó£¨ºóÃæ¸úÒ»³¤´®0µÄ£©»òÕߺÜС£¨Ç°ÃæÓÐÒ»³¤´®0µÄ£©µÄÊý±È½Ï¼ò¶ÌµØ±íʾ³öÀ´¡£ËüÃǶ¼Êǹ¦ÂÊÔöÒæµÄµ¥Î»£¬²»Í¬Ö®´¦ÈçÏ£º$#@3221a3dsÒK:JFD()$#_*(±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
µÚÒ». dB(*$#ÊK:JFD±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
dBÊÇÒ»¸ö±íÕ÷Ïà¶ÔÖµµÄÖµ£¬´¿´âµÄ±ÈÖµ£¬Ö»±íʾÁ½¸öÁ¿µÄÏà¶Ô´óС¹Øϵ£¬Ã»Óе¥Î»£¬µ±¿¼ÂǼ׵ŦÂÊÏà±ÈÓÚÒÒ¹¦ÂÊ´ó»òС¶àÉÙ¸ödBʱ£¬°´ÏÂÃæµÄ¼ÆË㹫ʽ£º10lg£¨¼×¹¦ÂÊ/ÒÒ¹¦ÂÊ£©£¬Èç¹û²ÉÓÃÁ½Õߵĵçѹ±È¼ÆË㣬ҪÓÃ20log£¨¼×µçѹ/ÒÒµçѹ£©¡£4fads13K:JFD()±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
[Àý] ¼×¹¦ÂʱÈÒÒ¹¦ÂÊ´óÒ»±¶£¬ÄÇô10lg£¨¼×¹¦ÂÊ/ÒÒ¹¦ÂÊ£©=10lg2=3dB¡£Ò²¾ÍÊÇ˵£¬¼×µÄ¹¦ÂʱÈÒҵŦÂÊ´ó3 dB¡£·´Ö®£¬Èç¹û¼×µÄ¹¦ÂÊÊÇÒҵŦÂʵÄÒ»°ë£¬Ôò¼×µÄ¹¦ÂʱÈÒҵŦÂÊС3 dB¡£
µÚ¶þ. dBmjouierpoejµK:JFD()$#_*±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
dBmÊÇÒ»¸ö±íʾ¹¦Âʾø¶ÔÖµµÄÖµ£¨Ò²¿ÉÒÔÈÏΪÊÇÒÔ1mW¹¦ÂÊΪ»ù×¼µÄÒ»¸ö±ÈÖµ£©£¬¼ÆË㹫ʽΪ£º10lg£¨¹¦ÂÊÖµ/1mw£©¡£#$@&%K:JFD±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
[Àý] Èç¹û¹¦ÂÊPΪ1mw£¬ÕÛËãΪdBmºóΪ0dBm¡£1fkjhfjouierK:JFD()$#_*(±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
[Àý] ¶ÔÓÚ40WµÄ¹¦ÂÊ£¬°´dBmµ¥Î»½øÐÐÕÛËãºóµÄֵӦΪ£º321%$#(*$#ÊK:JFD()$#_*±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
10lg£¨40W/1mw)=10lg£¨40000£©=10lg4+110lg10000=46dBm¡£
×ÜÖ®£¬dBÊÇÁ½¸öÁ¿Ö®¼äµÄ±ÈÖµ£¬±íʾÁ½¸öÁ¿¼äµÄÏà¶Ô´óС£¬¶ødBmÔòÊDZíʾ¹¦Âʾø¶Ô´óСµÄÖµ¡£ÔÚdB£¬dBm¼ÆËãÖУ¬Òª×¢Òâ»ù±¾¸ÅÄÓÃÒ»¸ödBm¼õÁíÍâÒ»¸ödBmʱ£¬µÃµ½µÄ½á¹ûÊÇdB£¬È磺30dBm - 0dBm = 30dB¡£89Î÷70874*$K:JFD()$#_*±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
Ò»°ãÀ´½²£¬ÔÚ¹¤³ÌÖУ¬dBmºÍdBmÖ®¼äÖ»ÓмӼõ£¬Ã»Óг˳ý¡£¶øÓõÃ×î¶àµÄÊǼõ·¨£ºdBm ¼õ dBm ʵ¼ÊÉÏÊÇÁ½¸ö¹¦ÂÊÏà³ý£¬ÐźŹ¦ÂʺÍÔëÉù¹¦ÂÊÏà³ý¾ÍÊÇÐÅÔë±È£¨SNR£©¡£dBm ¼Ó dBm ʵ¼ÊÉÏÊÇÁ½¸ö¹¦ÂÊÏà³Ë¡£
#ʲ21f3K:JFD()±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ
http://www.mscbsc.com/askpro/question.php?qid=13066s²»21fdsK:JFD()$±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ

»Ø´ðÕߣº xhy1331     »Ø´ðʱ¼ä£º2013-11-10 11:49    

7        6        


ѧϰÁË£¬¸Ðл¥Ö÷·ÖÏí3289Î÷7087K:JFD()$#_±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ

»Ø´ðÕߣº ÐÐÍòÀï·     »Ø´ðʱ¼ä£º2013-11-10 22:21    

7        6        


ѧϰÁË£¬Ò»Ö±²»Ì«Çå³þ£¬ÕýºÃÓлú»á£¬Ð»Ð»¶*&#%kcK:JFD()±¾ÎÄÀ´×ÔÒƶ¯Í¨ÐÅÍøwww.mscbsc.com,°æȨËùÓÐ

»Ø´ðÕߣº Ó¥ÐÐÌìÏ     »Ø´ðʱ¼ä£º2013-11-11 16:34    

7        4        

ÖйúͨÐÅÈ˲ÅÍø | ½­ËÕͨÐÅÈ˲ÅÍø | ɽ¶«Í¨ÐÅÈ˲ÅÍø | Î人ͨÐÅÈ˲ÅÍø | Õ㽭ͨÐÅÈ˲ÅÍø | ºþÄÏͨÐÅÈ˲ÅÍø
ÖØÇìÐÅ¿ÆͨÐŹ¤³ÌÓÐÏÞ¹«Ë¾ Ƹ£ºIMCÕÐƸ-°ÍÖÐ
ÐèÇóÈËÊý£º1 ÈË µØµã£º°ÍÖÐÊÐ
º¼ÖÝ»ªÐÇ´´ÒµÍ¨Ðż¼Êõ¹É·ÝÓÐÏÞ¹«Ë¾ Ƹ£ºÖи߼¶ºǫ́-Ì«Ô­
ÐèÇóÈËÊý£º2 ÈË µØµã£ºÌ«Ô­ÊÐ
¼Î»·¿Æ¼¼¹É·ÝÓÐÏÞ¹«Ë¾ Ƹ£º²âÊÔ¹¤³Ìʦ
ÐèÇóÈËÊý£º15 ÈË µØµã£ºÀ¥Ã÷ÊÐ,ÁÙ²×ÊÐ,µÂºêÖÝ,ºìºÓÖÝ,ÓñϪÊÐ
ÖÐÒÆÌúͨÓÐÏÞ¹«Ë¾½­ÃÅ·Ö¹«Ë¾ Ƹ£º¸ßÌúרÍøά»¤Ô±
ÐèÇóÈËÊý£º2 ÈË µØµã£º½­ÃÅÊÐ
ºÓ±±Öд´Ó¯ºÍͨÐſƼ¼ÓÐÏÞ¹«Ë¾ Ƹ£º³õ¼¶ºǫ́
ÐèÇóÈËÊý£º5 ÈË µØµã£º°²Ë³ÊÐ
ÄϾ©ÐÀÍøͨÐſƼ¼¹É·ÝÓÐÏÞ¹«Ë¾ Ƹ£ºÍøÓŹ¤³Ìʦ£¨RFÓÅ»¯³õÖи߼¶£©
ÐèÇóÈËÊý£º5 ÈË µØµã£ºÑγÇÊÐ,Ì©ÖÝÊÐ,Õò½­ÊÐ
ÄϾ©Ð­Ö®Ô¶ÐÅÏ¢¼¼ÊõÓÐÏÞ¹«Ë¾ Ƹ£ºµçÐÅЭÓÅÈÏÖ¤ ³õ¼¶/Öм¶¹¤³Ìʦ
ÐèÇóÈËÊý£º20 ÈË µØµã£º½­ËÕÊ¡
ÉϺ£ÈðºÌͨѶ¼¼ÊõÓÐÏÞ¹«Ë¾ Ƹ£º¹ãÖÝÖи߼¶¹¤³Ìʦ
ÐèÇóÈËÊý£º3 ÈË µØµã£º¹ãÖÝÊÐ
ÔªµÀͨÐŹɷÝÓÐÏÞ¹«Ë¾ Ƹ£ºSEQÒµÎñ·ÖÎö
ÐèÇóÈËÊý£º5 ÈË µØµã£ºÐ½®
±±¾©µçÆìͨѶ¼¼Êõ¹É·ÝÓÐÏÞ¹«Ë¾ Ƹ£ºÍøÓÅʵϰÉúͨÐÅÓ¦½ìÉú£¨ÔÆÄÏ£©
ÐèÇóÈËÊý£º1 ÈË µØµã£ºÀ¥Ã÷ÊÐ,˼éÊÐ,ÕÑͨÊÐ
ÈȵãÎÊÌâ
¸ü¶à¾«²Ê

ÁªÏµÎÒÃÇ - ÎÊͨÐÅר¼Ò Powered by MSCBSC Òƶ¯Í¨ÐÅÍø  © 2006 -