A
ll
ri
g
h
ts
re
se
rve
d
.
P
a
ssi
n
g
o
n
a
n
d
co
p
yi
n
g
o
f
th
is
d
o
cu
m
e
n
t,
u
se
a
n
d
co
m
m
u
n
ica
ti
o
n
o
f
it
s
co
n
te
n
ts
n
o
t
p
e
rm
it
te
d
w
it
h
o
u
t
w
ri
tt
e
n
a
u
th
o
ri
za
ti
o
n
f
ro
m
A
lca
te
l.
For real RF PCB antenna:
Max
2.4GHz
antenna gain is: 3
.16dbi
Max
5GHz
antenna gain is:
3.00dbi
4.2.2
Immunity to external spurious and interferences
The RF radio can be perturbed by external high amplitude radiofrequency fields. In this case, the RF
may show high bit error rate for example.
To improve the immunity, we choice AMPAK AP6256 chip, there is a shield to cover on RF chip and
related RF circuit.
Total
R
e
s
p
o
n
s
e
(d
B
)
-25
0
-20
-15
-10
-5
X
Y
Z
Azimuth = 0.0
Elevation = 0.0
Roll = 0.0
Total
R
e
s
p
o
n
s
e
(d
B
)
-25
0
-20
-15
-10
-5
Z
Y
X
Azimuth = 89.1
Elevation = -9.2
Roll = -87.4
Total
R
e
s
p
o
n
s
e
(d
B
)
-25
0
-20
-15
-10
-5
Z
X
Y
Azimuth = 62.0
Elevation = -88.7
Roll = 151.9
Summary of Contents for 8088
Page 17: ......
