HPMX-2006 Mixer Port Impedances
GHz
0.05
0.10
0.15
0.20
0.25
0.30
0.40
0.50
0.60
0.70
0.80
0.90
Mag.
0.86
0.81
0.84
0.88
0.93
0.91
0.80
0.81
0.80
0.80
0.85
0.84
Deg.
-4
GHz
Mag.
0.49
0.48
0.46
0.42
0.40
0.31
0.24
0.20
0.20
0.16
0.37
0.53
Deg.
-49
GHz
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
Mag.
0.60
0.55
0.52
0.36
0.18
0.17
0.20
0.24
0.28
0.34
0.37
Deg.
82
38
-5
[1]
0.50
0.75
-3
-63
-1
1.00
1.25
1.50
1.75
-73
-3
-82
-35
-44
-17
5
-9
-102
-114
-131
147
87
-15
-19
-23
-28
-30
-34
-39
[2]
1.75
2.00
2.25
2.50
2.75
3.00
13
17
12
3
15
-131
168
Figure 10. Impedance of Mixer RF
Port.
Figure 9. Impedance of Mixer LO Port.
Figure 8. Impedance of Mixer IF Port.
[1] Circuit of Figure 11 with IF and RF
PortsTerminatedin50 Ω.
[2] As above but LO RC combination in
Figure 11 changed from 12 Ω and
12 pFto0 Ωand2.7 pF(recommended
usefor>1.75GHz).
Circuit of Figure 11 with 1 k Pull up
Resistors for the IFs and LO and RF Ports
Terminatedin50 Ω.
Circuit of Figure 11 with IF and LO Ports
Terminated in 50 Ω.
Typical Scattering Parameters, Common Emitter, ZO = 50 Ω,VCC = 3V,IC = 23mA
Freq.
GHz
0.1
0.5
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
3.0
S11
Ang.
S21
Mag.
9.68
7.43
6.73
6.49
6.30
5.99
5.73
5.67
5.31
4.66
4.31
4.20
3.82
3.62
3.47
3.16
2.94
2.71
2.54
2.28
1.67
S12
S22
Mag.
0.51
0.37
0.37
0.37
0.39
0.39
0.40
0.41
0.40
0.40
0.38
0.37
0.36
0.33
0.33
0.31
0.31
0.30
0.32
0.32
0.32
dB
Ang.
-26
-49
-76
-85
dB
Mag.
0.014
0.011
0.007
0.015
0.010
0.008
0.004
0.012
0.009
0.005
0.020
0.022
0.023
0.019
0.018
0.034
0.029
0.029
0.022
0.023
0.038
Ang.
-43
11
1
25
22
28
118
68
85
147
99
102
102
88
91
96
102
89
90
Mag.
0.91
0.78
0.80
0.83
0.84
0.84
0.84
0.85
0.87
0.84
0.85
0.84
0.84
0.79
0.77
0.75
0.72
0.69
0.67
0.65
0.49
Ang.
-3
149
144
120
113
104
96
88
81
75
67
62
61
58
62
62
64
70
75
19.72
17.42
16.56
16.24
15.99
15.55
15.16
15.07
14.50
13.37
12.69
12.46
11.64
11.17
10.81
9.99
-37.08
-39.17
-43.10
-36.48
-40.00
-41.94
-47.96
-38.42
-40.92
-46.02
-33.98
-33.15
-32.77
-34.42
-34.89
-29.37
-30.75
-30.75
-33.15
-32.77
-28.40
-16
-22
-23
-26
-29
-32
-33
-36
-40
-40
-44
-49
-51
-54
-58
-62
-65
-70
-76
-103
-94
-101
-112
-120
-125
-134
-145
-148
-153
-161
-168
-175
178
173
170
166
134
9.37
8.66
8.10
7.16
79
84
94
89
99
4.45
7-70