Datasheet

S. P. K. ELECTRONICS CO., LTD.
DRAWING：
RUF
DESIGNED BY ：
Jeffery
CHECKED BY ：
Jason
APPROVED BY ：
D.S.M
UNLESS OTHER SPECIFIED TOLERANCES ON：
TITLE:
SPK-WA-WTH43003
X＝ X.X＝ X.XX＝
Part No.
112010003
REV.：A1 UNIT：mm
Document No.
PAGE 2 of 9
2–1﹒Frequency Band：
Frequency T
x
(MHz) R
x
(MHz)
GSM/850E 824~849 870~894
GSM 880 ~ 915 925 ~ 960
DCS 1710 ~ 1785 1805 ~ 1880
PCS 1850~1909 1930~1990
3﹒Measurement Setup：
（1）Reflection Coefficient Measurement：
（a）Instrument：
Network Analyzer
（b）Setup：
（I）Calibrate the Network Analyzer by one port calibration using
O.S.L calibration kits.
（II）Connect the antenna under test to the Network Analyzer.
（III）Measure the S11(reflection coefficient) shown in Fig. 1.
（IV）Generally, the S11 is less than –10dB to ensure the 90% power
into antenna and only less than 10% power back to system.