HIGH POWER
ATTENUATORS
DC-4 GHz
GENERAL INFORMATION
The KDI/Triangle PPA Series of attenuators utilize a Beryllium Oxide chip
and thin film technology to provide devices which can dissipate up to 100
watts of R.F. power. The PPA series must be thermally bonded to a heat
sink, using the mounting holes provided, in order to operate within the
temperature rating indicated. The flange temperatures must not exceed
100°C under rated power conditions.
SERIES PPA
GENERAL SPECIFICATIONS
Impedance:
Operating Temperature:
Attenuation Stability:
Substrate:
Resistive Element:
Flange:
Tabs:
Cover:
50 Ohms
–55°C to +150°C
0.0001 dB/dB/°C
Beryllium Oxide Ceramic
Proprietary Thin Film
Copper, Nickel Plated per QQ-N-290
Beryllium Copper, Gold Plated per MIL-G-45204
Alumina Ceramic
ORDERING INFORMATION
The Power Attenuators listed are available in 1 dB increments from 1
thru 20 dB. Specify by selecting any of the series listed and add the
attenuation value desired to the basic series designation.
EXAMPLE:
Basic
Series PPA
PPA 20-10
Power
Desired dB
Value
PERFORMANCE SPECIFICATIONS
Model
PPA 10
Attenuation
(1)
1 dB Increments
(dB)
1-20
Frequency
(1)
Range
DC-4 GHz
Input
Power
(Watts)
10
dB
1-10
11-20
1-5
6-9
10-15
16-20
PPA 20
1-20
DC-4 GHz
20
PPA 50
PPA 100
1-20
1-20
DC-1 GHz
DC-500 MHz
50
100
Attenuation (1) Accuracy
(dB)
DC-1 GHz
1-2.5 GHz
±
0.5
±
0.5
±
1.0
±
2.0
±
0.5
±
0.5
±
0.5
±
0.5
±
0.75
±
1.0
±
1.0
±
2.0
±0.3 DC-500 MHz
±0.5 500 MHz-1 GHz
±0.5
2.5-4 GHz
±
1.0
±
3.0
±
0.5
±
1.0
±
1.5
±
3.0
VSWR
(Maximum)
2
1.3:1
1.15:1 – DC-1.0 GHz
1.35:1 – 1.0-2.5 GHz
1.50:1 – 2.5-4.0 GHz
1.25:1 – DC-500 MHz
1.50:1 – 500 MHz–1 GHz
1.25:1 – DC-200 MHz
1.50:1 – 200-500 MHz
Notes:
1. Custom products are available at higher frequencies
with optimized VSWR and attenuation accuracy over
narrow frequency bandwidths.
2. VSWR as measured in a 0.125” ground plane stripline
circuit.
3. Standard values 1, 2, 3, 4, 5, 6, 10, 20 dB.
Non-std values available as special order.
PPA 10 outline
.040[1,02] x .005[,0,13]
±.001[0,03]
THK.
.300
[7,6]
.200.MIN.
[5,1]
.200[5,1]
.100[2,5]
.125[3,18]
TYP MIN.
.100[2,5]
.105[2,67]
.116[2,95] DIA
.200[5,1]
PPA 20 outline
.515
[13,08]
.060[1,52]
.250[6,4]
.
MIN.
.250[6,4]
.108[2,74]
±.001[0,08]
.003[0,25]
.116[2,95] DIA
.330
[8,38]
.060[1,52]
TYP.
.062[1,57]
.160[4,06]
MAX
PPA 50 outline
.975
[24,77]
.375
[9,53]
.003±.001
[0,08±0,03]
.405
[10,29]
.125[3,18]
TYP.
.060[1,52]
TYP.
.171[4,34]
PPA 100 outline
1.250
[31,75]
.500
[12,7]
.171[4,34]
MAX.
.003±.001
[0,08±0,03]
.125[3,18]
.250[6,4] MIN.
.125[3,18]
.062[1,57]
.150[3,8]
MAX
.375[9,53]
.187[4,75]
.160[4,06]
DIA.
.250[6,4] MIN.
.500[12,7]
.250[6,4] MIN.
.110[2,79]
.200[5,1] MAX
.250[6,4] MIN.
.125[3,18]
.875
[22,23]
.210[5,33]
.725
[18,42]
KEY:
Inches[Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
60 South Jefferson Road, Whippany, NJ 07981
s
Tel: 973-887-8100
s
Fax: 973-884-0445
E-Mail: sales@mcekdi-resistor.com
s
See us on the web @ www.mcekdi-resistor.com
8/02
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