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
o
C
Maximum Voltage and Current
BVces
Collector to Emitter Voltage
BVebo
Emitter to Base Voltage
Ic
Collector Current
Maximum Temperatures
Storage Temperature
Operating Junction Temperature
1167 Watts
60 Volts
4.0 Volts
35 Amps
- 65 to + 200
o
C
+ 200
o
C
ELECTRICAL CHARACTERISTICS @ 25
O
C
SYMBOL
Pout
Pin
Pg
η
c
VSWR
CHARACTERISTICS
Power Out
Power Input
Power Gain
Collector Efficiency
Load Mismatch Tolerance
TEST CONDITIONS
F = 450 MHz
Vcc = 40 Volts
Pulse Width = 60
µs
Duty = 2%
Rated Conditions
MIN
500
8.5
60
5:1
TYP
535
70
MAX
UNITS
Watts
Watts
dB
%
BVces
BVceo
BVebo
Hfe
Cob
θ
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
o
C/W
Initial Issue June, 1994
GHz TECHNOLOGY INC. RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE. GHz RECOMMENDS THAT
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
October 1997
R3
L6
R1
L1
C13
L2
C11
l
5
l
7
L7
C15
C8
l
3
l
9
1.85"
l
1
50W
B1
1.105"
.3"
.59"
.585"
C9
50W
C6
C10
l
10
C1
l
2
C2
C3
Q1
C5
B2
C4
l
4
R2
L3
L4
C12
l
6
l
8
C7
L8
L5
C14
R3
C16
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
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