关于MOTOV3和FMA

V3 uses FJA antenna, folded J,

请问,FJA是什么样的天线

Folded J Antenna, it is a monopole antenna, with 2 arms, one for GSM and one for DCS PCS, these 2 arms are holded into J shape, the feed is a vertical rod from PCB.

What is the two arms location based on the feed point?

How is the metal housing of the V3 considered on the antenna performance?I am considering to design PIFA or Microstrip IFA type antenna for 900Mhz and 2.4Ghz(BT), any suggestions?Thanks

it is relatively easier to design PIFA for GSM/DCS PCS if you are given enough height limit, IFA might not give you enough BW. FJA is placed around 8cm away from PCB, two arms are folded into J shapre, just imagine 2 J shaped monopole combined together and feeded with one single feedrod. FJA actually looks like PIFA but it is not placed ontop of groundplane, instead away from gp.

monopole天綫SAR會有問題的

The two arms are made as one conjoint unit?
How about BlueTooth antenna? An additional BT antenna used ? Thanks,