GPS/GNSS Low-Noise Amplifiers
Table 2. MAX2658 Typical S-Parameter Values and K-Factor
FREQ.
(MHz)
1000
1100
1200
1300
1400
1500
1575
1600
1700
1800
1900
2000
S11 MAG
(dB)
-3.0
-3.3
-3.5
-3.8
-4.3
-4.9
-5.3
-5.4
-5.5
-5.3
-5.1
-4.9
S11
PHASE
(Degrees)
-57.0
-58.2
-60.0
-62.3
-63.3
-62.0
-59.7
-58.5
-53.7
-50.3
-48.0
-46.3
S21 MAG
(dB)
10.8
11.6
13.4
14.9
15.9
16.6
16.6
16.5
15.8
14.7
13.4
12.7
S21
PHASE
(Degrees)
-120.0
-124.5
-134.6
-148.0
-162.3
-178.9
168.0
163.9
149.3
136.8
130.0
123.9
S12 MAG
(dB)
-43.0
-42.1
-39.3
-37.2
-35.4
-33.9
-33.5
-33.6
-33.6
-34.2
-35.1
-35.8
S12
PHASE
(Degrees)
-154.0
-155.0
-160.5
-168.3
-178.2
171.0
161.7
157.5
148.3
142.5
139.6
138.6
S22 MAG
(dB)
-1.3
-1.6
-2.4
-4.0
-7.3
-14.5
-19.6
-16.7
-9.0
-5.7
-4.0
-3.0
S22
PHASE
(Degrees)
-65.0
-70.2
-79.6
-90.0
-101.0
-100.6
-26.0
-6.0
3.6
-2.8
-9.6
-15.0
K f
3.2
3.3
2.8
2.7
2.7
2.6
2.5
2.5
2.3
2.2
2.3
2.1
Table 3. MAX2657 Typical Noise Parameters (V CC = 2.85V, T A = +25°C)
FREQUENCY (MHz)
1550
1560
1570
1575
1580
1590
1600
FMIN
(dB)
0.68
0.68
0.68
0.68
0.68
0.68
0.68
| Γ OPT |
0.44
0.44
0.44
0.44
0.44
0.44
0.44
| Γ OPT | ANGLE
47.7
48.1
48.3
48.5
48.6
48.9
49.2
R N ( Ω )
8.39
8.38
8.37
8.36
8.36
8.35
8.34
Table 4. MAX2658 Typical Noise Parameters (V CC = 2.85V, T A = +25°C)
FREQUENCY (MHz)
1550
1560
1570
1575
1580
1590
1600
FMIN
(dB)
0.68
0.68
0.68
0.68
0.68
0.69
0.69
| Γ OPT |
0.28
0.28
0.28
0.28
0.28
0.28
0.28
| Γ OPT | ANGLE
88.0
88.4
88.8
89.0
89.2
89.6
90.0
R N ( Ω )
4.48
4.48
4.48
4.48
4.48
4.47
4.47
_______________________________________________________________________________________
7
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