2731-20R1
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2731-20
20Watts, 36 Volts, 100us, 10%
Radar 2700-3100 MHz
GENERAL DESCRIPTION
The 2731-20is an internally matched, COMMON BASE bipolar transistor
capable of providing 20Watts of pulsed RF output power at 100 pulse width,
10% duty factor across the 2700 to 3100 MHz band. The transistor prematch
and test fixture has been optimized through the use of 10 Ohm TRL Analysis.
This ceramic sealed transistor is specifically designed for S-band radar
applications. It utilizes gold metallization and emitter ballasting to provide high
reliability and supreme ruggedness.
CASE OUTLINE
55KCR-1
Common Base
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation
Device Dissipation @ 25°C
1
70 W
Maximum Voltage and Current
Collector to Base Voltage (BV
ces
) 65 V
Emitter to Base Voltage (BV
ebo
) 3.0 V
Peak Collector Current (I
c
) 1.85 A
Maximum Temperatures
Storage Temperature -65 to +200 °C
Operating Junction Temperature +200 °C
ELECTRICAL CHARACTERISTICS @ 25°
°°
°C
SYMBOL CHARACTERISTICS TEST CONDITIONS MIN TYP MAX UNITS
P
out
Power Output
F=2700-3100 MHz 20 W
P
g
Power Gain
Pulse Width = 100s 8.2 dB
η
c
Collector Efficiency Duty Factor = 10 % 45 %
R
l
Return Loss Power Input = 3W -7 dB
VSWR-S Load Mismatch Stability Vcc = +36V 1.5:1
VSWR-T
Load Mismatch Tolerance
F = 2700, 2900, 3100 MHz 3:1
FUNCTIONAL CHARACTERISTICS @ 25°
°°
°C
Ices
Collector to Emitter Leakage Vce=40V 1.5 mA
BV
ces
Collector to Emitter Breakdown Ic = 10 mA 65 V
θjc
1
Thermal Resistance 2.5
°C/W
