MRF321 datasheet(2/5 Pages) MACOM

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ELECTRICAL CHARACTERISTICS — continued (TC = 25°C unless otherwise noted.)

Characteristic

Unit

Max

Typ

Min

Symbol

DYNAMIC CHARACTERISTICS

Output Capacitance

(VCB = 28 Vdc, IE = 0, f = 1.0 MHz)

Cob

—

FUNCTIONAL TESTS (Figure 1)

Common–Emitter Amplifier Power Gain

(VCC = 28 Vdc, Pout = 10 W, f = 400 MHz)

GPE

—

Collector Efficiency

(VCC = 28 Vdc, Pout = 10 W, f = 400 MHz)

—

Load Mismatch

(VCC = 28 Vdc, Pout = 10 W, f = 400 MHz,

VSWR = 30:1 all phase angles)

No Degradation in Output Power

Figure 1. 400 MHz Test Circuit Schematic

C1, C2, C3 — 1.0–20 pF Johanson Trimmer (JMC 5501)

C3, C4 — 47 pF ATC Chip Capacitor

C5, C10 — 0.1

µF Erie Redcap

C7 — 0.5–10 pF Johanson Trimmer (JMC 5201)

C8 — 0.018

µF Vitramon Chip Capacitor

C9 — 200 pF UNELCO Capacitor

C11, C12 — 680 pF Feedthru

C13 — 1.0

µF, 50 Volt Tantalum Capacitor

D1 — 1N4001

L1 — 0.33

µH Molded Choke with Ferroxcube Bead

L1 — (Ferroxcube 56–590–65/4B) on Ground End of Coil

L2 — 4 Turns #20 Enamel, 1/8

″ ID

L3 — 6 Turns #20 Enamel, 1/4

″ ID

L4 — Ferroxcube VK200–19/4B

R1 — 5.1

Ω, 1/4 Watt

R2 — 120

Ω, 1.0 Watt

R3 — 20

Ω, 1/2 Watt

R4 — 47

Ω, 1/2 Watt

Z1 — Microstrip 0.1

″ W x 1.35″ L

Z2 — Microstrip 0.1

″ W x 0.55″ L

Z3 — Microstrip 0.1

″ W x 0.8″ L

Z4 — Microstrip 0.1

″ W x 1.75″ L

Board — Glass Teflon,

εR = 2.56, t = 0.062″

Input/Output Connectors — Type N

C10

C11

C12

C13

28 V

OUTPUT

INPUT

DUT

5 V

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