无源有源测试

DREAM-LEE · 发表于 2006-12-28 17:20:44

各位大侠们,有谁能帮我解释哟现象啊
就是无源测试效率有45%左右,为什么有源测试才有20%呢?要么高端茶,要么低端差(DCS)
搞不明白,不知道问题出在哪里,有哪位大侠指点指点啊.不圣感激!!!!!

xiaocainiao · 发表于 2006-12-28 18:14:27

passive test is to test the antenna efficiency, while the active testing include TRP and TIS . TRP is not only related to the antenna efficiency ,but also the matching between the PA and the antenna port. although the RF guys have check the RF conductive power, pls remember that the conductive power is measured when the RF module is set to 50Ohm, while the actual staues between PA and antenna is not 50Ohm.

DREAM-LEE · 发表于 2006-12-29 21:52:25

大哥你的意思我明白,那你认为我是调PA的匹配还是我天线端的匹配啊?[em13]

blackcy · 发表于 2006-12-29 23:47:29

大哥,你是怎么测有源效率的啊?

lovrf · 发表于 2006-12-31 12:24:37

可能是PA端的匹配做得不好，从射频连接器向PA方向的阻抗偏离50ohm较大
有源是对手机进行OTA测试（在暗室环境下测试3维各个方向的手机辐射功率，利用积分求得辐射总功率，即TRP）得到TRP(total radiated power)，有源功率即TRP与cable测试功率的比值

xiaocainiao · 发表于 2007-1-2 11:13:42

antenna engineer mainly tune the antenna smith chart to fit the pa load pull . however, the pa load pull automatic testing system is a bit expensive, not all the mp factories can afford.anyway, if your company can buy it, u can output the pa loadpull , then try to tune the antenna phase to match the best output of pa.[em01]

DREAM-LEE · 发表于 2007-1-3 09:58:11

我那手机是PDA的,天线前面有一个大的LCD,在3D测试中0度和60度是的凹陷较大,

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