PIN DIODE
ATTENUATORS
GA & 1
-GT SERIES
GENERAL INFORMATION
Aeroflex-KDI PIN Diode Attenuators continuously
change the amplitude of a microwave signal by
varying DC Voltage, or a digital signal, depending on
the model type selected. The two standard models
have temperature compensation options which
operate over -55°C to +85°C. A matched
configuration of diodes keeps the VSWR low
through all values of attenuation and frequency.
GENERAL SPECIFICATIONS
RF Power:
To prevent self biasing, the
attenuators should be operated
at less than 100 mW CW , and
60 W peak. Units will not be
damaged by application of
1 Watt CW or 100 Watts Peak.
Power:
± 5 Volts at ±50 mA MAX
1
Control Voltage:
0-10 Volts produce 0-64dB
Attenuation (Max Control Voltage
is 10 Volts)
Switching:
Units typically can be changed
from any value of attenuation to
any other value in 2µS.
Connectors:
SMA Standard.
NOTES
1) Two/Tone intermodulation products: Second and
third order products approximately 50 dBc for
Pin
≤
0 dBm (each signal) at all attenuation
settings.
2) If a narrow frequency bandwidth is required,
Aeroflex-KDI can supply a unit that is electrically
optimized for that bandwidth. Mechanical
dimensions will remain the same as the standard
unit, and the price will generally be lower.
3) When ordering, add suffix indicating required
temperature compensation range to the model
number, i.e., The 1-GT-31-TT, compensated over
the temperature range -55°C to +85°C. Standard
units are +10°C to +40°C.
4) Monotonicity guaranteed for all models.
1
-GT-(XX)
Voltage Controlled – 10°C to 40°C
Input – ± 5 Volts @ 50mA
1
Control Voltage – 0-10 Volts max
-55°C to +85°C Models add… (-TT) to the part number
GA-(XX)
Digital TTL Controlled – 10°C to 40°C
Input – ± 5 Volts @ 50mA
1
TTL Control – 8 BITS (LSB=.25dB)
-55°C to +85°C Models add… (-TT) to the part number
Type
(XX)
14
20
26
31
40
42
44
Frequency
GHz
.5-1.0
1.0-2.0
2.0-4.0
4.0-8.0
8.0-12.4
8.0-18.0
12.0-18.0
VSWR
Max
1.5
1.5
1.5
1.75
2.1
2.2
2
Insertion
Outline
loss
Attenuation 1-GT-
(dB Max) Range dB
(XX)
2.5
2.8
3.1
3.4
3.8
3.75
3.75
64
64
64
64
64
64
64
12
14
14
16
17
17
17
Outline
GA-
(XX)
22
24
24
26
26
26
26
ATTENUATION ACCURACY
@ 25° C
±.4dB
to 10dB
±.75dB
to 20dB
±1.0dB
to 30dB
±1.25dB
to 40dB
±1.75dB
to 64dB
+10 to +40°C
±.5dB
to 10dB
±.1.0dB
to 20dB
±1.5dB
to 30dB
±1.7dB
to 40dB
±2.5dB
to 64dB
-55 to +85° C
±.75dB
to 10dB
±1.2dB
to 20dB
±1.5dB
to 30dB
±2.0dB
to 40dB
±3.0dB
to 64dB
–
3
–
Aeroflex / KDI-Integrated Products
60 South Jefferson Rd • Whippany NJ 07981
,
Tel: 973.887.8100 • Fax: 973.884.0445
www.aeroflex-kdi.com • sales@aeroflex-kdi.com
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