MRF1518NT1
5
RF Device Data
Freescale Semiconductor
Figure 10. 820 - 850 MHz Broadband Test Circuit
VDD
RF
INPUT
RF
OUTPUT
C1
DUT
L1
N2
N1
B1, B2 Long Ferrite Beads, Fair Rite Products
C1, C9 12 pF, 100 mil Chip Capacitors
C2 6.8 pF, 100 mil Chip Capacitor
C3, C4 20 pF, 100 mil Chip Capacitors
C5 51 pF, 100 mil Chip Capacitor
C6, C13 1000 pF, 100 mil Chip Capacitors
C7, C14 0.039 μF, 100 mil Chip Capacitors
C8 1 μF, 20 V Tantalum Chip Capacitor
C10 3 pF, 100 mil Chip Capacitor
C11, C12 51 pF, 100 mil Chip Capacitors
C15 22 μF, 35 V Tantalum Chip Capacitor
L1, L2 18.5 nH, 5 Turn, Coilcraft
N1, N2 Type N Flange Mounts
R1 47 Ω
Chip Resistor (0805)
Z1 1.145″
x 0.080
″
Microstrip
Z2 0.786″
x 0.080
″
Microstrip
Z3 0.115″
x 0.223
″
Microstrip
Z4 0.145″
x 0.223
″
Microstrip
Z5 0.260″
x 0.223
″
Microstrip
Z6 0.081″
x 0.080
″
Microstrip
Z7 0.104″
x 0.080
″
Microstrip
Z8 1.759″
x 0.080
″
Microstrip
Board Glass Teflon?, 31 mils, 2 oz. Copper
VGG
B1
R1
L2
Z1
C2
Z2
Z3
C3
C4
Z4
+
C8
C7
C6
C5
Z5
Z6
C9
Z7
C10
Z8
C11
B2
C12
C13
C14
+
C15
TYPICAL CHARACTERISTICS, 820 - 850 MHz
Pout, OUTPUT POWER (WATTS)
IRL, INPUT RETURN LOSS (dB)
?10
?30
?40
?20
2
1
0
5789101112
Figure 11. Output Power versus Input Power
Pin, INPUT POWER (WATTS)
4
Figure 12. Input Return Loss
versus Output Power
0.3
P
out
, OUTPUT POWER (WATTS)
0
6
0.4 0.60.5
0.1
2
820 MHz
830 MHz
0.2
0
12
840 MHz
3
8
10
46
VDD
= 12.5 Vdc
VDD
= 12.5 Vdc
850 MHz
820 MHz
830 MHz
840 MHz
850 MHz
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