MRF492 Datasheet, PDF (2/4 Pages) Motorola, Inc – RF POWER TRANSISTOR NPN SILICON

RF
INPUT
C1
L1
C2
C5
RFC2
+
C6
C7
–
L2
L3
C8
RFC1
DUT
C3
C4
BEAD
+12.5 Vdc
RF
OUTPUT
C1, C8 — 9.0 – 180 pF, Arco 463
C2, C3, C4 — 80 – 480 pF, Arco 466
C5 — 1000 pF, 350 V, Unelco
C6 — 10 µF, 25 Vdc
C7 — 0.01 µF, Ceramic
RFC1 — 10 µH Molded Choke
RFC2 — 12 Turns, #16 AWG, Enameled Wire Closewound
RFC2 — on a 2.0 W Carbon Resistor
L1 — 2 Turns, #18 AWG Enameled Wire, 0.4″ ID, 0.15″ Long
L2 — Loop, #12 AWG Wire, 0.6″ High, 0.4″ Wide
L3 — 2 Turns, #12 AWG Wire, ID 0.4″, 0.25″ Long
Bead — Ferrite Bead Ferroxcube #56–590–65/3B
Figure 1. 50 MHz Test Circuit
100
VCC = 12.5 V
80 ^{f = 50 MHz}
20
VCC = 12.5 V
18
Pout = 70 W
60
16
40
14
20
12
0
0 1 2 3 4 5 6 7 8 9 10
Pin, INPUT POWER (WATTS)
Figure 2. Output Power versus Input Power
10
20
25
30
35
40
45 50
f, FREQUENCY (MHz)
Figure 3. Power Gain versus Frequency
MRF492
2
MOTOROLA RF DEVICE DATA