ELECTRICAL CHARACTERISTICS
(T
C
= 25°C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
FUNCTIONAL CHARACTERISTICS — MRF176GU
(1) (Figure 2)
Common Source Power Gain
(V
DD
= 50 Vdc, P
out
= 150 W, f = 400 MHz, I
DQ
= 2.0 x 100 mA)
Drain Efficiency
(V
DD
= 50 Vdc, P
out
= 150 W, f = 400 MHz, I
DQ
= 2.0 x 100 mA)
Electrical Ruggedness
(V
DD
= 50 Vdc, P
out
= 150 W, f = 400 MHz, I
DQ
= 2.0 x 100 mA,
VSWR 10:1 at all Phase Angles)
NOTE:
1. Measured in push–pull configuration.
G
ps
η
ψ
No Degradation in Output Power
12
45
14
50
—
—
dB
%
A
BIAS
C11
C12
L1
C1
B1
L2
C2
C3
C4
Z2
D.U.T.
R3
A
B1 — Balun, 50
Ω
Semirigid Coax .086 OD 2″ Long
B2 — Balun, 50
Ω
Semirigid Coax .141 OD 2″ Long
C1, C2, C9, C10 — 270 pF ATC Chip Capacitor
C3 — 15 pF ATC Chip Cap
C4, C8 — 1.0–20 pF Piston Trimmer Cap
C5 — 27 pF ATC Chip Cap
C6, C7 — 22 pF Mini Unelco Capacitor
C11, C13, C14, C15, C16 — 0.01
µF
Ceramic Capacitor
C12 — 1.0
µF
50 V Tantalum Cap
C17, C18 — 680 pF Feedthru Capacitor
.200
C19 — 10
µF
100 V Tantalum Cap
L1, L2 — Hairpin Inductor #18 W
L3, L4 — Hairpin Inductor #18 W
.200″
C14
C16
R1
B
C17
L7
C18
L8
C19
50 V
C13
R2
Z1
C15
C9
Z3
C5
Z4
L6
B
C6
C7
C8
C10
L4
L3
B2
.400″
.200″
L5, L6 — 13T #18 W .250 ID
L7 — Ferroxcube VK–200 20/4B
L8 — 3T #18 W .340 ID
R1 — 1.0 kΩ 1/4 W Resistor
R2, R3 — 10 kΩ 1/4 W Resistor
Z1, Z2 — Microstrip Line .400L x .250W
Z3, Z4 — Microstrip Line .450L x .250W
Ckt Board Material — .060″ teflon–fiberglass, copper clad both sides, 2 oz. copper,
ε
r
= 2.55
Figure 2. 400 MHz Test Circuit
REV 9
3
MA-COM [ M/A-COM TECHNOLOGY SOLUTIONS, INC. ]
