MRF652 MRF652S

2

MOTOROLA RF DEVICE DATA

Characteristic

Symbol

Min

Typ

Max

Unit

DYNAMIC CHARACTERISTICS

Output Capacitance (VCB = 15 Vdc, IE = 0, f = 1.0 MHz)

Cob

—

9.5

15

pF

FUNCTIONAL TESTS

Common–Emitter Amplifier Power Gain

f = 512 MHz

(VCC = 12.5 Vdc, Pout = 5.0 W)

f = 870 MHz

Gpe

10

—

11

6.0

—

—

dB

Collector Efficiency

(VCC = 12.5 Vdc, Pout = 5.0 W, f = 512 MHz)

η

60

65

—

%

Load Mismatch

(VCC = 15.5 Vdc, Pin = 500 mW, f = 512 MHz,

VSWR = 30:1, At All Phase Angles)

ψ

No Degradation in Output Power

Figure 1. 440 – 512 MHz Broadband Test Circuit

B1, B2, B3 — Ferrite Bead

C1 — 7.0 pF Unelco Mica

C2 — 1.0 – 6.0 pF Johanson Variable 5201

C3 — 15 pF Unelco Mica

C4 — 43 pF Mini–Underwood Mica

C5 — 56 pF Mini–Underwood Mica

C6 — 1000 pF Unelco Mica

C7 — 0.1

µF Ceramic

C8 — 68 pF Mini–Underwood Mica

C9 — 1.0

µF Electrolytic 25 V

C10, C11 — 5.0 pF Unelco Mica

C12 — 1.0 – 10 pF Johanson Variable 5501

L1, L2 — 6 Turns, 20 AWG Wire 0.125

″ ID

Z1, Z2 — 25 Ohm

µStripline

Z3, Z4, Z5 — 50 Ohm

µStripline

Board — 0.032

″ Glass–Teflon

D.U.T.

C4

C6

C7

C9

+

GRD

Z5

Z4

Z3

Z2

Z1

C8

C1

C2

C3

C5

C10

C11

C12

L1

B1

L2

B3

B2

+12.5 Vdc

–