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BEFORE THE PRODUCT(S) DESCRIBED HEREIN ARE WRITTEN INTO SPECIFICATIONS, OR USED IN CRITICAL APPLICATIONS,
THAT THE PERFORMANCE CHARACTERISTICS BE VERIFIED BY CONTACTING THE FACTORY.
GHz Technology Inc. 3000 Oakmead Village Drive, Santa Clara, CA 95051-0808 Tel. 408 / 986-8031 Fax 408 / 986-8120
UDR-500
500 Watts - 40 Volts, Pulsed
Radar 400 - 450 MHz
GENERAL DESCRIPTION
The UDR-500 is an internally matched, COMMON EMITTER transistor
capable of providing 500 Watts of pulsed RF output power at sixty
microseconds pulse width, two percent duty factor across the band 400-450
MHz. This hermetically solder sealed transistor is specifically designed for
long pulse radar applications. It utilizes gold metalization and diffused emitter
ballasting to provide high reliability and supreme ruggedness.
CASE OUTLINE
55JV, STYLE 2
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation @ 25 C 1167 Watts
o
Maximum Voltage and Current
BVces Collector to Emitter Voltage 60 Volts
BVebo Emitter to Base Voltage 4.0 Volts
Ic Collector Current 35 Amps
Maximum Temperatures
Storage Temperature - 65 to + 200 C
o
Operating Junction Temperature + 200 C
o
ELECTRICAL CHARACTERISTICS @ 25 C
O
SYMBOL
CHARACTERISTICS
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Pout
Pin
Pg
c
VSWR
Power Out
Power Input
Power Gain
Collector Efficiency
Load Mismatch Tolerance
F = 450 MHz
Vcc = 40 Volts
Pulse Width = 60
s
Duty = 2%
Rated Conditions
500
8.5
535
60
70
5:1
Watts
Watts
d B
%
BVces
BVceo
BVebo
Hfe
Cob
jc
Collector to Emitter Breakdown
Collector to Emitter Breakdown
Emitter to Base Breakdown
DC Current Gain
Output Capacitance
Thermal Resistance
Ic = 50 mA
Ic = 30 mA
Ie = 20 mA
Vce =5 V, Ic =1A
Vcb = 40V, F =1 MHz
Rated Pulse Condition
70
30
4.0
20
60
0.15
Volts
Volts
C/W
o
Initial Issue June, 1994
UDR-500
PC BOARD MATERIAL 0.015" TEFLON FIBERGLASS
B1, B2=Balun 50W semi-rigid coax 5.1" long
l
1
, l
2
=25W, .149=.070"W x 2.76"L
l
3
, l
4
=25W, .132=.070"W x 2.43"L
l
5
, l
6
=7.3W, .038=.3"W x .6864"L
l
7
, l
8
=2.7W, .045=.840"W x .8"L
l
9
, l
10
=25W, .0162=0.70"W x .3"L
C1=12pf, ATC "B" (100MIL)
C2=6.2pf, ATC "B" (100MIL)
C3=5.6pf, Dielectric Labs
C4=20pf, ATC "B" (100MIL)
C5,C6=.3-3.5pf, Johanson Piston Trimmer
C7,C8=5.2pf, ATC "B" (100MIL)
C9,C10=180pf, ATC "B" (100MIL)
C11,C12,C13,C14=470pf, ATC "B" (100MIL)
C15,C16=50mf, 50 WVDC Electrolytic
R1,R2=15W, 1/2 watt
R3,R4=15W, 1 watt
L1,L3=1 1/2 turns #18 AWG on .250 I.D
L2,L4=4 turns #16 AWG on Indiana General
ferrite toroid #FG27-8
L5,L6=2 mil copper strap .6" x .0625"
L7,L8=5 turns #16 AWG on Indiana General
ferrite toroid #F624-19
R1
L1
50W
L2
C11
B1
C1
C2
C3
Q1
C4
C5
R2
L4
C12
L3
L6
C13
L7
R3
C15
C8
C9
C6
C10
C7
L5
L8
B2
R3
C14
C16
50W
1.105"
.3"
.59"
.585"
1.85"
l
1
l
2
l
3
l
4
l
9
l
10
l
5
l
6
l
7
l
8
October 1997
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