Prepare by Xiong Wei min

1
????????????

• Prepare by Xiong Wei min
• March 24.2008

2
??????

• ???????????????????????????????????????????,??
  ??????????1/2??????????????(?????????)?????,??????
  ??????,?????????,?????????????????????????????????
  ????,????????,??????????,??????????????

• 1.??????Return Loss(????S11)

3
??????

• Directionality(?????)
• ??????????????????(omni-directional)???(direction
  al)?
• Gain(??)
• ??????????????????????????
• Efficiency(??)
• GainDirectionality Efficiency
• EfficiencyOutput Power/Input Power

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????

• Polarization(??)
• ?????????????????????????
• PIFA?Monopole?????
• ?????????,????????
• XY???H?,YZ?E1?,XZ?E2??

??
5
??????

• PIFA
• Planar Inverted F Antenna
• Internal Planar Monopole
• ????????
• Internal PCB FPC
• ??????

6
???? vs PIFA??(???)(?)

• ??PIFA??,GSM/DCS(/PCS)
• ??????
• ??Z???,??????

7
???? vs PIFA??(???)(?)
short pin
Feed pin
L3540
w1525
Antenna
H68
Ground
8
???? vs PIFA??(???)(?)

• PIFA????????
• W,L,H,??H???????????????W?L?????????
• ??PCB????PIFA?????
• Shielding Case??????
• ??????PIFA?????

9
PIFA??????????

• PIFA????????????????????
• ??(GSM/DCS)600 78mm
• ??(GSM/DCS/PCS)700 78mm
• ???????GSM???????-10dBi,DCS/PCS?01dBi?
• ?????????????,???Speaker?Vibrator
• ?????????????5mm???
• ??????????????,?????????

10
??????????(?????,?????)
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PIFA???

• PIFA??????????,??????????
• PIFA?????
• ????,??????????????????
• ??3G????????,???????(?)??????900(800)MHz?1700MHz2
  200MHz????????????PIFA???????

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????Monopole???????

• ?????????????
• Monopole????????,????3G????2GHz?????????
• ????Monopole????,???????????????

13
Feed Strip
??????
???? 38X6X4
PCB
??????
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??Planar Monopole vs ??????

• ??Planar Monopole????????????PIFA??
• Monopole????,????????PCB?Ground?
• Monopole?????Feed Point?PCB??Pad???

15
????????
??
Pogo Pin
??
Pogo Pin
PCB
????Pogo Pin?
PCB
????Pogo Pin?

• Stamping
• Stamping???Housing??,Stamping??spring???PCB??
• Stamping Support
• Stamping???Support?,???spring
• Stamping Support Pogo pin (???)
• Stamping???Support?,???Pogo Pin?
• ????Pogo Pin??????support???,????????

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??meander

• FPC????meander??????,????PCB??,???????PCB???
• ??????PCB??,???PCB???????????????1.6?,???????1.6?,
  ????????
• ????RF???????????????????????????????,??????????
  ????????????

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????????
18

• ????!