Attenuation(1) Input Attenuation (1) Accuracy
1 dB Increments Frequency(1) Power (dB) VSWR
Model (dB) Range (Watts) dB DC-1 GHz 1-2.5 GHz 2.5-4 GHz (Maximum)2
PPA 10 1-20 DC-4 GHz 10 1-10 ±0.5 ±0.5 ±1.0 1.3:1
11-20 ±1.0 ±2.0 ±3.0
1-5 ±0.5 ±0.5 ±0.5
PPA 20 1-20 DC-4 GHz 20 6-9 ±0.5 ±0.5 ±1.0 1.15:1 – DC-1.0 GHz
10-15 ±0.75 ±1.0 ±1.5 1.35:1 – 1.0-2.5 GHz
16-20 ±1.0 ±2.0 ±3.0 1.50:1 – 2.5-4.0 GHz
±0.3 DC-500 MHz 1.25:1 – DC-500 MHz
PPA 50 1-20 DC-1 GHz 50 ±0.5 500 MHz-1 GHz 1.50:1 – 500 MHz–1 GHz
1.25:1 – DC-200 MHz
PPA 100 1-20 DC-500 MHz 100 ±0.5 1.50:1 – 200-500 MHz
HIGH POWER
ATTENUATORS SERIES PPA
DC-4 GHz
GENERAL INFORMATION
The KDI/T riangle PPASeries 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.
PERFORMANCE SPECIFICATIONS
GENERAL SPECIFICATIONS
Impedance: 50 Ohms
Operating Temperature: –55°C to +150°C
Attenuation Stability: 0.0001 dB/dB/°C
Substrate: Beryllium Oxide Ceramic
Resistive Element: Proprietary Thin Film
Flange: Copper, Nickel Plated per QQ-N-290
Tabs:
Beryllium Copper, Gold Plated per MIL-G-45204
Cover: 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: PPA 20-10
Basic Desired dB
Series PPA Power Value
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.
.515
[13,08]
.060[1,52]
.250[6,4]
. MIN. .116[2,95] DIA
.125[3,18]
.250[6,4] MIN.
.062[1,57]
.150[3,8] MAX
.108[2,74]
±.001[0,08]
.003[0,25]
.250[6,4]
.125[3,18]
PPA 10 outline
PPA 100 outline
.300
[7,6]
.040[1,02] x .005[,0,13]
±.001[0,03] THK.
.200.MIN.
[5,1]
.200[5,1]
.100[2,5]
.100[2,5]
.116[2,95] DIA
.125[3,18]
TYP MIN.
.062[1,57]
.160[4,06] MAX
.105[2,67]
.200[5,1]
PPA 50 outline
.171[4,34]
.725
[18,42]
.375
[9,53]
.975
[24,77]
.330
[8,38]
.060[1,52]
TYP.
.250[6,4] MIN.
.187[4,75]
.375[9,53]
.125[3,18]
TYP.
.003±.001
[0,08±0,03]
.110[2,79]
.200[5,1] MAX
PPA 20 outline
1.250
[31,75]
.875
[22,23]
.500
[12,7]
.405
[10,29]
.500[12,7]
.060[1,52]
TYP.
.250[6,4] MIN.
.250[6,4] MIN.
.160[4,06]
DIA.
.171[4,34]
MAX.
.003±.001
[0,08±0,03]
.210[5,33]
.125[3,18]
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
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