Max2338 triple/dual-mode cdma lna/mixers – Rainbow Electronics MAX2338 User Manual
Page 11
MAX2338
Triple/Dual-Mode CDMA LNA/Mixers
______________________________________________________________________________________
11
Layout Considerations
Keep RF signal lines as short as possible to minimize
losses and radiation. Use high Q components for the
LNA input-matching circuit to achieve the lowest possi-
ble noise figure. At the digital mixer outputs, keep the
differential signal lines together and of equal length to
ensure signal balance. For best gain and noise perfor-
mance, solder the exposed paddle evenly to the board
ground plane.
FREQUENCY (MHz)
|
S11
|
∠S11
|
S21
|
∠S21
|S12|
∠S12
|
S22
|
∠S22
30
0.890
-4.9
0.002
-95
0.001
-112
0.996
-48
50
0.883
-7.2
0.001
-60
0.001
-121
0.990
-73
100
0.872
-13.2
0.391
-81
0.002
-178
0.980
-114
200
0.841
-25
0.882
-112
0.007
171
0.970
-150
300
0.799
-35
1.42
-131
0.010
150
0.959
-166
400
0.778
-41
2.1
-153
0.02
125
0.947
-173
600
0.750
-62
2.15
-172
0.02
100
0.943
173
800
0.706
-75
2.2
162
0.025
80
0.944
151
1000
0.676
-85
2.45
150
0.029
65
0.919
133
1200
0.659
-94
2.59
142
0.032
42
0.879
115
1500
0.634
-108
3.03
134
0.036
31
0.824
94.4
1750
0.578
-110
3.58
126
0.038
19
0.780
81
1900
0.560
-90.8
3.64
120.6
0.04
11.8
0.740
61.7
1910
0.558
-91.0
3.64
119.6
0.04
9.06
0.738
60.7
1920
0.554
-91.4
3.64
118.9
0.04
8.8
0.733
59.6
1930
0.551
-91.7
3.63
118.2
0.04
6.7
0.729
58.5
1940
0.547
-92.2
3.63
117.7
0.04
5.3
0.725
57.4
1950
0.543
-92.2
3.63
117.0
0.04
4.87
0.720
56.1
1960
0.538
-92.4
3.63
116.5
0.04
4.1
0.716
55.0
1970
0.536
-92.5
3.61
115.9
0.04
1.8
0.716
53.6
1980
0.533
-92.9
3.60
115.2
0.04
1.5
0.711
52.3
1990
0.530
-93.0
3.59
114.7
0.04
0
0.707
50.9
2000
0.523
-93.4
3.57
113.0
0.04
-2.1
0.702
49.5
2250
0.347
-155
2.88
131
0.05
-32
0.518
24
2500
0.298
-158
2.71
172
0.05
-72
0.489
5
3000
0.273
-160
2.64
-165
0.06
-94
0.473
-18
4000
0.245
-170
2.03
-145
0.067
-120
0.425
-30
Table 3. MAX2338 PCS Band LNA S-Parameters High-Gain, High-Linearity Mode