User's Manual

WM_PRJ_Q2400_PTS_002 - 004
March 5, 2004
M atching
circuit
Z
L
= 50 Ohm
Receiver +
WISMO module
Z
A
Figure 7: Matching circuit
The matching circuit is composed by four elements implemented (see figure above) on the module
connecting the "Antenna pad" to the "Round pad" (access to the receiver and the transmitter).
The four elements of the matching circuit are not yet defined, and depend on each antenna and
mechanical integration.
The matching circuit must be verified for each frequency bandwidth:
Q2406
:
 900 MHz (880 to 960 MHz),
 1800 MHz (1710 to 1880 MHz).
Q2426
:
 850 MHz (824 to 894 MHz),
 1900 MHz (1850 to 1990 MHz).
CM4
CM2
CM3
CM1
Figure 8: WISMO Q24x6 sub-series antenna matching circuit (bottom view)
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