SERIES PPA
ATTENUATORS
High Power – DC-4GHz
The Aeroflex/KDI 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.
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. (See note 3)
PPA 20-10
Basic
Series PPA
Power
Desired dB
Value
GENERAL SPECIFICATIONS
Impedance
Operating Temp.
Substrate
Resistive Element
Flange
Tabs
Cover
50 Ohms
–55
°C
to +1
50°C
Beryllium Oxide Ceramic
Proprietary Thin Film
Copper, Nickel Plated per QQ-N-290
Beryllium Copper, Gold Plated per MIL-G-45204
Alumina Ceramic
Attenuation Stability 0.0001 dB/dB/°C
PERFORMANCE SPECIFICATIONS
Model
PPA 10
1
1-20
PPA 20
6-9
10-1
5
16-20
PPA 50
PPA 100
Attenuation
(1)
1 dB Increments
(dB)
1-20
1-20
Frequency
(1)
Range
DC-4 GHz
DC-4 GHz
Input
Power
(Watts)
10
20
dB
1-10
1-5
Attenuation Accuracy (1)
(dB)
DC-1 GHz
1-2.5 GHz
±0.5
±1.0
±0.5
±0.5
±0.75
±1.0
±0.5
±2.0
±0.5
±0.5
±1.0
±2.0
2.5-4 GHz
±1.0
±3.0
±0.5
±1.0
±1.5
±3.0
1.3:1
VSWR
(Typical)
2
1.1 – DC-1.0 GHz
5:1
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
1-20
1-20
DC-1 GHz
DC-500 MHz
50
100
±0.3
DC-500 MHz
±0.5
500 MHz-1 GHz
±0.5
PHYSICAL DIMENSIONS
NOTES
1. Custom products
.116 [2.95] DIA.
are available
at higher
frequencies
.125 [3.18] MIN.
TYP
with optimized
VSWR and
attenuation
accuracy over
narrow frequency
.100 [2.54]
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.
.250 [6.35] MIN.
TYP
.116 [2.95] DIA.
.250 [6.35]
MIN
.125 [3.18]
.250 [6.35]
.125 [3.18]
.515 [13.08]
.500 [12.70]
.250 [6.35]
.250 [6.35]
MIN TYP
.060 [1.52] TYP
.500 [12.70]
.105 [2.67]
.160 [4.06]
THRU PLS
.125 [3.18]
.210 [5.33]
MAX
.040 [1.02] x
.005
±
.001 THK
[0.13
±
0.03]
.160 [4.06] MAX.
.375 [9.52]
.060 [1.52] TYP
.175 [4.45]
.125 [3.18]
THRU 2 PLS
.300 [7.62]
.100 [2.54]
.200 [5.08]
.250 [6.35]
MIN TYP
.125 [3.18]
.105 [2.67]
.725 [18.42]
.975 [24.77]
.110 [2.79]
.200 [5.08]
MAX
.375 [9.53]
.003
±
.001 [0.08
±
0.03]
.171 [4.34]
.062 [1.58]
PPA10 OUTLINE
.060 [1.52] x
.003
±
.001 THK
[0.08
±
0.03]
PPA50 OUTLINE
1.250 [31.75]
.875 [22.23]
.003
±
.001 [0.08
±
0.03]
.171 [4.34]
.150 [3.81] MAX.
.405 [10.29]
.188 [4.76]
.062 [1.58]
PPA20 OUTLINE
PPA100 OUTLINE
KEY:
Inches [Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
300 Dino Drive, Ann Arbor, MI 48103
Tel: 888-244-6638 or 734-426-5553
•
Fax: 734-426-5557
www.aeroflex.com/inmet
•
inmetsales@aeroflex.com
REV 04/11
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