ML7436N LSI Hardware Design Manual
FEXL7436NDG-01
17
C
match
=
1
50 ⋅ 𝜔
RF
⋅ √
𝑅
lna
50
− 1
⋯ (2)
The impedance moves to 50+j0Ω when the capacitor Cmatch is connected on the Smith chart as following
Figure 7.8
.
Figure 7.8
Impedance conversion with Cmatch addition
7.1.4.
Connection to antenna
Figure 7.9
shows the connection between antenna and the matching circuit. The characteristic impedance is 50Ω.
Figure 7.9
Addition of the characteristic impedance 50Ω line
7.1.5.
Reception matching value
Table 7.3
shows the matching value that LAPIS technology adjusts it. In fact, it is necessary to make fine adjustment
for each different board.
50Ω line
LNA input impedance
Lmatch connection
Cmatch connection
50+j0Ω
