
6
RF Device Data
Freescale Semiconductor
MRF282SR1 MRF282ZR1
Z7
0.408″ x 0.08″ Microstrip
Z8
0.990″ x 0.08″ Microstrip
Z9
0.295″ x 0.08″ Microstrip
Raw Board
0.030″ Glass Teflon, 2 oz Copper,
Material
3″ x 5″ Dimensions,
Arlon GX0300-55-22, εr = 2.55
Figure 4. Class A Broadband Test Circuit Schematic
RF
INPUT
RF
OUTPUT
DUT
Z9
Z1
Z2
Z3
Z4
Z5
Z6
Z8
VSUPPLY
VDD
Q1
Q2
C2
C4
L1
C7
C3
C10
C13
C14
L2
C19
C18
C20
C15
R1
B1
R8
VDD
C5
C6
C8
C9
R9
B2
R10
B3
C16
C11
Z7
C12
C17
C1
R2
R3
R4
R5
R6
R7
+
Z1
0.624″ x 0.08″ Microstrip
Z2
0.725″ x 0.08″ Microstrip
Z3
0.455″ x 0.08″ Microstrip
Z4
0.530″ x 0.330″ Microstrip
Z5
0.280″ x 0.330″ Microstrip
Z6
0.212″ x 0.330″ Microstrip
Table 6. Class A Broadband Test Circuit Component Designations and Values
Designators
Description
B1, B2, B3
Ferrite Beads, Ferroxcube #56-590-65-3B
C1, C20
470 μF, 63 V Electrolytic Capacitors, Mallory #SME63V471M12X25L
C2
0.01 μF Chip Capacitor, ATC #100B103JCA50X
C3, C10, C15
0.6-4.5 pF Variable Capacitors, Johanson #27271SL
C4, C16
0.02 μF Chip Capacitors, ATC #100B203JCA50X
C5
100 μF, 50 V Electrolytic Capacitor, Mallory #SME50VB101M12X256
C6, C7, C9, C14, C17
12 pF Chip Capacitors, ATC #100B120JCA500X
C8, C13
51 pF Chip Capacitors, ATC #100B510JCA500X
C11, C12
0.3 pF Chip Capacitors, ATC #100B0R3CCA500X
C18
0.1 μF Chip Capacitor, Kemet #CDR33BX104AKWS
C19
0.4-2.5 pF Variable Capacitor, Johanson #27285
L1
8 Turns, 0.042″ ID, 24 AWG, Enamel
L2
9 Turns, 0.046″ ID, 26 AWG, Enamel
Q1
NPN, 15 W, Bipolar Transistor, MJD310
Q2
PNP, 15 W, Bipolar Transistor, MJD320
R1
200 Ω, 1/4 W Axial Resistor
R2
1.0 kΩ, 1/2 W Potentiometer, Bourns
R3
13 kΩ, 1/4 W Axial Resistor
R4, R6, R7
390 Ω, 1/8 W Chip Resistors, Garrett Instruments #RM73B2B391JT
R5
1.0 Ω, 10 W 1% Resistor, Dale #RE65G1R00
R8, R9, R10
12 Ω, 1/8 W Chip Resistors, Garrett Instruments #RM73B2B120JT
Input/Output
Type N Flange Mount RF55-22 Connectors, Omni-Spectra