MC45 Hardware Interface Description
P R E L I M I N A R Y
MC45_HD_01_V00.02a
Page 72 of 90
12.08.2002
5.4 Antenna design
This chapter describes the various options of connecting an external antenna to MC45. Be
sure that all peripherals are applied according to the manufacturer’s antenna specifications.
For internal antenna equipment, you are advised to use the services of a consultant or full-
service house.
5.4.1 Hirose antenna connector
MC45 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 MC45 board can be
seen in Figure 28.
Figure 33: Mechanical dimensions of U.FL-R-SMT connector
Table 23: Product specifications of U.FL-R-SMT connector
Item
Specification
Conditions
Ratings
Nominal impedance
50
W
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
Æ
0.475 pin
gauge
Repetitive operation
Contact resistance:
Center 25 m
W
Outside 15m
W
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 M
W
min. at high humidity
500 M
W
min when dry
Exposure to 40°C, humidity of
95% for a total of 96 hours
