User's Manual Part 1

MC75 Hardware Interface Description
Strictly confidential / Draft
s
MC75_V00.190a Page 61 of 91 15.02.2005
4.3 Antenna Connector
MC75 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 MC75 board can be
seen in Figure 30.
Figure 30: Mechanical dimensions of U.FL-R-SMT connector
Table 11: Product specifications of U.FL-R-SMT connector
Item Specification Conditions
Ratings
Nominal impedance
50 Ω
Rated frequency DC to 3 GHz
Operating temp:-40°c to + 90°C
Operating humidity: max. 90%
Mechanical characteristics
Female contact holding
force
0.15 N min
Measured with a ∅ 0.475 pin
gauge
Repetitive operation Contact resistance:
Center 25 mΩ
Outside 15mΩ
30 cycles of insertion and
disengagement
Vibration No momentary disconnections of
1 µs;
No damage, cracks and looseness
of parts
Frequency of 10 to 100 Hz,
single amplitude of 1.5 mm,
acceleration of 59 m/s
2
, for 5
cycles in the direction of each of
the 3 axes
Shock No momentary disconnections of
1 µs.
No damage, cracks and looseness
of parts.
Acceleration of 735 m/s
2
, 11 ms
duration for 6 cycles in the
direction of each of the 3 axes
Environmental characteristics
Humidity resistance No damage, cracks and looseness
of parts.
Insulation resistance:
100 MΩ min. at high humidity
500 MΩ min when dry
Exposure to 40°C, humidity of
95% for a total of 96 hours
Temperature cycle No damage, cracks and looseness
of parts.
Contact resistance:
Center 25 mΩ
Outside 15mΩ
Temperature: +40°C → 5 to 35°C
→ +90°C → 5 to 35°C
Time: 30 min. → within 5 min. →
30 min. within 5 min
Salt spray test No excessive corrosion 48 hours continuous exposure to
5% salt water