mrf5s4140h Freescale Semiconductor, Inc, mrf5s4140h Datasheet - Page 12

• Manufacturer Part Number: mrf5s4140h
• Description: Rf Power Field Effect Transistors
• Manufacturer: Freescale Semiconductor, Inc

12
MRF5S4140HR3 MRF5S4140HSR3
Figure 18. Series Equivalent Source and Load Impedance — 420 - 430 MHz
f = 450 MHz
f = 400 MHz
Input
Matching
Network
Z
Z
source
load
Z
source
MHz
400
405
410
415
420
425
430
435
440
445
450
f
V
DD
= Test circuit impedance as measured from
= Test circuit impedance as measured
= 28 Vdc, I
Z
gate to ground.
from drain to ground.
source
0.454 - j0.530
0.476 - j0.435
0.430 - j0.360
0.455 - j0.281
0.419 - j0.153
0.421 - j0.135
0.435 - j0.032
0.426 + j0.048
0.407 + j0.044
0.429 + j0.262
0.452 + j0.341
Z
DQ
Device
Under
Test
source
f = 400 MHz
W
Z
= 1250 mA, P
o
f = 450 MHz
= 5 Ω
Z
Z
load
out
load
1.87 - j0.530
1.91 - j0.376
1.88 - j0.276
1.91 - j0.046
1.89 - j0.019
1.92 + j0.128
1.97 + j0.276
1.99 + j0.392
1.99 + j0.537
2.05 + j0.675
2.10 + j0.765
= 28 W Avg.
Z
load
W
Output
Matching
Network
Freescale Semiconductor
RF Device Data