DEMO-ALM-81224 Datasheet, PDF (18/23 Pages) Broadcom Corporation. – High Linearity 1450 – 2750 MHz Variable Gain Amplifier

Scattering Parameters Measurement Schematic
Vdd1 = +5 V
C2
L1 ^{2.4 pF}
C1
C15 C16
0.1 PF _L2 7.5 pF 0.1 PF
Vdd2 = +5 V
C17
2.2 PF
Reference
Plane
RFin
C4
7.5pF
Reference
Plane
RFout
C5
C7
7.5 pF 7.5 pF
C12 0.1 PF
C9 ^C11
7.5 pF _{7.5 pF}
Vc_att Vc1 Vc2 Vddbias = +5 V
Figure 73. Scattering Parameters Measurement Schematic
Table 4. Scattering Parameters
Freq
L1
L2
(MHz)
(nH) (nH)
1485
9.0
5.6
1840 / 1960 5.6
5.6
2140
1.9
5.6
2650
1.0
5.6
S11
(dB)
-10.72
-12.94
-11.37
-8.42
S11
(ang)
71.23
163.82
158.91
141.80
S21
(dB)
25.02
23.51
22.40
16.59
S21
(ang)
27.8
-97.11
-167.51
88.91
S12
(dB)
-59.77
-51.85
-47.88
-47.03
S12
(ang)
-92.74
160.82
108.65
30.74
S22
(dB)
-4.22
-8.02
-8.73
-3.63
S22
(ang)
73.69
156.35
-177.21
178.28
50 ohm
Vdd1 = +5 V _Bias
Tee
Reference
Plane
RFin
C4
7.5pF
50 ohm
Bias ^{Vdd2 = +5 V}
Tee
Reference
Plane
RFout
C5
C7
7.5 pF 7.5 pF
C12 0.1 PF
C9 ^C11
7.5 pF _{7.5 pF}
Vc_att Vc1 Vc2 Vddbias = +5 V
Figure 74. Broadband Scattering Parameters Measurement Schematic
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