Direct Conversion Receivers
CMX994/CMX994A/CMX994E
S11
S22
Freq
(MHz)
Equivalent
Parallel Circuit
(R//C)
54.5R // 2.6pF
54.8R
Impedance
(Ω-/+jΩ)
Equivalent Parallel
Circuit (R//C)
Impedance
(Ω-/+jΩ)
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
347 – j296
208 – j263
129 – j217
93 – j181
72 – j154
58 – j130
49 – j114
42 – j102
37.7 – j91
33.9 – j83
29.7 – j74
27.0 – j66
24.7 – j61
22.8 – j55
21.3 – j50
19.9 – j45
18.7 – j41
17.2 – j37.0
15.7 – j32.9
14.8 – j29.1
598.9R // 4.5pF
540.7R // 3.7pF
496R // 3.6pF
444.5R // 3.5pF
401.1R // 3.4pF
351R // 3.4pF
318R // 3.4pF
286.5R // 3.3pF
256.3R // 3.3pF
235.3R // 3.3pF
211.8R // 3.4pF
190.6R // 3.4pF
173.1R // 3.5pF
154.9R // 3.5pF
136.7R // 3.6pF
121.5R // 3.7pF
107R // 3.8pF
96.7R // 3.9pF
84.6R // 4.1pF
72R // 4.3pF
54.4 – j2.4
54.8 + j0.4
55.3 + j1.7
56.1 + j2.9
56.9 + j3.5
57.4 + j3.9
57.7 + j4.0
58.1 + j3.9
58.4 + j4.0
58.4 + j4.2
58.3 + j4.1
57.9 + j3.9
57.3 + j3.8
56.7 + j3.9
55.9 + j3.7
55.3 + j3.6
54.3 + j3.6
52.8 + j3.9
51.5 + j4.7
50.7 + j5.1
55.4R
56.3R
57.1R
57.6R
58.0R
58.4R
58.7R
58.7R
58.6R
58.2R
57.6R
57.0R
56.1R
55.5R
54.5R
53.1R
51.9R
51.2R
Table 3 LNA S11 and S22 Impedances and Parallel Equivalent Circuit in 50Ω Mode
100Ω Mode
Figure 5 LNA S11 (100Ω Mode)
Figure 6 LNA S22 (100Ω mode)
2015 CML Microsystems Plc
D/994_A_E/1
Page 11 of 70
CMLMICRO [ CML MICROCIRCUITS ]
