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XT65/XT75 Hardware Interface Overview
4.3 Antenna Connector
4.3
Antenna Connector
For GSM and GPS, XT65/XT75 uses an ultra-miniature SMT antenna connector supplied from Hirose Ltd. The
product name is:
•
U.FL-R-SMT
The position of the antenna connector on the XT65/XT75 board can be seen in
Table 7: Product specifications of U.FL-R-SMT connector
Item
Ratings
Nominal impedance
Rated frequency
Mechanical characteristics
Female contact holding force 0.15N min
Repetitive operation
Vibration
Shock
Environmental characteristics
Humidity resistance
XT65_XT75_HO_v00.130
Confidential / Preliminary
Figure 4: Mechanical dimensions of U.FL-R-SMT connector
Specification
50Ω
DC to 3GHz
Contact resistance:
Center 25mΩ
Outside 15mΩ
No momentary disconnections of
1µs;
No damage, cracks and looseness
of parts
No momentary disconnections of
1µs.
No damage, cracks and looseness
of parts.
No damage, cracks and looseness
of parts.
Insulation resistance:
100MΩ min. at high humidity
500MΩ min. when dry
Page 23 of 67
s
Section
4.1.
Conditions
Operating temp:-40°C to + 90°C
Operating humidity: max. 90%
Measured with a ; 0.475 pin
gauge
30 cycles of insertion and disen-
gagement
Frequency of 10 to 100Hz, single
amplitude of 1.5mm, acceleration
2
of 59m/s
, for 5 cycles in the
direction of each of the 3 axes
2
Acceleration of 735m/s
, 11ms
duration for 6 cycles in the direc-
tion of each of the 3 axes
Exposure to 40°C, humidity of
95% for a total of 96 hours
2006-10-12
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