MRF1946 Datasheet, PDF (4/6 Pages) Motorola, Inc – RF POWER TRANSISTORS NPN SILICON

12
100
Gpe
10
80
8
η_c
Pin = 3 W
VCC = 12.5 V
60
6
INPUT VSWR
4
150
155
160
165
f, FREQUENCY (MHz)
2.0:1
40
1.5:1
1.1:1
20
170
175
Figure 8. Typical Performance in a Broadband Circuit
150
f = 136 MHz 175
220
Zin
150 ²²⁰
f = 136 MHz 175 ZOL*
Zo = 10 Ω
VCC = 12.5 Vdc, Pout = 30 W
f
Zin
MHz
Ohms
ZOL*
Ohms
136
0.60 – j0.48
2.22 – j0.74
150
0.63 – j0.26
2.30 – j0.40
175
0.62 + j0.13
2.35 – j0.04
220
0.73 + j0.57
2.20 + j0.43
ZOL* = Conjugate of the optimum load impedance
ZOL* = into which the device output operates at a
ZOL* = given output power, voltage and frequency.
Figure 9. Series Equivalent Input and
Output Impedance
MRF1946 MRF1946A
4
MOTOROLA RF DEVICE DATA