MRF134 Datasheet, PDF (5/10 Pages) Motorola, Inc – N-CHANNEL MOS BROADBAND RF POWER FET

R3*
C7
C1
RF INPUT
Z1
C2
D1
R2
C8
L2
R4
C11
C9
+ _C12
C10 -
L1
Z4
R1
Z2
Z3
DUT
C3
V_DD = 28 V
C13
C14
Z5
C6
RF OUTPUT
C4
C5
*Bias Adjust
C1, C6 — 270 pF, ATC 100 mils
C2, C3, C4, C5 — 0–20 pF Johanson
C7, C9, C10, C14 — 0.1 µF Erie Redcap, 50 V
C8 — 0.001 µF
C11 — 10 µF, 50 V
C12, C13 — 680 pF Feedthru
D1 — 1N5925A Motorola Zener
L1 — 6 Turns, 1/4″ ID, #20 AWG Enamel
L2 — Ferroxcube VK–200 — 19/4B
R1 — 68 Ω, 1.0 W Thin Film
R2 — 10 kΩ, 1/4 W
R3 — 10 Turns, 10 kΩ Beckman Instruments 8108
R4 — 1.8 kΩ, 1/2 W
Z1 — 1.4″ x 0.166″ Microstrip
Z2 — 1.1″ x 0.166″ Microstrip
Z3 — 0.95″ x 0.166″ Microstrip
Z4 — 2.2″ x 0.166″ Microstrip
Z5 — 0.85″ x 0.166″ Microstrip
Board — Glass Teflon, 62 mils
Figure 14. 400 MHz Test Circuit
REV 6
5
400
400
225
225
Z_in{
150
f = 100 MHz
150 _ZOL*
f = 100 MHz
Z_o = 50 Ω
V_DD = 28 V, I_DQ = 50 mA, P_out = 5.0 W
f
Z_in{
MHz
Ohms
Z_OL*
Ohms
100 21.2 - j25.4 20.1 - j46.7
150 14.6 - j22.1 19.2 - j38.2
225 ă9.1 - j18.8 17.5 - j33.5
400 ă6.4 - j10.8 16.9 - j26.9
{68 Ω Shunt Resistor Gate-to-Ground
Z_OL* = Conjugate of the optimum load impedance
Z_OL* = into which the device output operates at a
Z_OL* = given output power, voltage and frequency.
Figure 15. Large–Signal Series Equivalent
Input/Output Impedances, Z_in†, Z_OL*