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Continuously Variable
Attenuators

 

Miniature Models

These units represent the most complete line of miniature continuously variable attenuators. Most models weigh 2 or 3 ounces and have been qualified for all types of military applications. Since attenuation is achieved in a non-contacting manner, these units provide the utmost in wear-free performance and high reliability.

General Specifications
RF Power 5 Watts average
3 kW peak
Connectors SMA female standard
Temp Range -55°C to +85°C
Resettability 0.1 dB or better
Material Body - Aluminum
Conn - Stainless Steel
Finish ARRA Blue per
MIL-C-22750
Mounting All forms have tapped
or thru holes

Applications

The standard forms are ideal for applications where attenuation can be set, then locked and left for long periods of time without movement. The panel-mount version is ideally suited for applications where front panel adjustment is required and monitored via output power. Turns-counting dials are ideally suited for panel-mount applications where calibration or reference for resetting is required. The digital counter version performs the same task as the turns-counting dial but with greater resolution. Both T&D options can be calibrated by utilizing a calibration chart. Order CT or CD option.

Optional Features

The standard attenuator packages, Forms 2191 and 3651, have non-translating 1/4" diameter shafts with lock nut. They achieve full attenuation in less than 20 turns. To maintain versatility this attenuator comes in 3 other packages. To specify these options, precede the model number with P for panel-mount version, T for turns-counting version, or D for digital-counter version.

 


Standard
2191 & 3651


P Option
4321 & 4322


T Option
4319 & 4320


D Option
0-3345 & 0-3346


 Level Set Models
Freq
Range (GHz)		 Atten
Range(dB)		 VSWR
(Max)		  Ins Loss
(Max dB)		 Standard
Form Factor 		 Model
No.
1.0-2.0 10 1.8 0.5 3651 3814-10
1.5-2.0 15 1.7 0.5 3651 3814-15
2.0-2.4
2.0-2.4		 10
20		 1.8
1.5		 0.5
0.5		 2191
3651		 4804-10
4814-20
2.5-4.0 10 1.5 0.5 2191 4804-10X
3.6-4.3
3.6-4.3
3.6-4.3		 10
20
30		 1.5
1.5
1.5		 0.5
0.5
0.5		 2191
2191
3651		 4-5804-10
4-5804-20
4-5814-30
4.0-8.0
4.0-8.0
4.0-8.0		 10
20
30		 1.5
1.5
1.5		 0.5
0.5
0.5		 2191
2191
3651		 5804-10
5804-20
5814-30
6.0-11.0
6.0-11.0
6.0-11.0
6.0-11.0		 10
20
30
40		 1.5
1.5
1.5
1.5		 0.5
0.5
0.5
0.5		 2191
2191
2191
3651		 5-6804-10
5-6804-20
5-6804-30
5-6814-40
8.0-12.4
8.0-12.4
8.0-12.4
8.0-12.4		 10
20
30
40		 1.5*
1.5*
1.5*
1.5*		 0.5
0.5
0.5
0.5		 2191
2191
2191
3651		 6804-10
6804-20
6804-30
6814-40
8.0-18.0
8.0-18.0
8.0-18.0
8.0-18.0		 10
20
30
40		 1.5*
1.5*
1.5*
1.5*		 1.0
1.0
1.0
1.0		 2191
2191
2191
3651		 9804-10
9804-20
9804-30
9814-40
12.0-18.0
12.0-18.0
12.0-18.0
12.0-18.0		 10
20
30
40		 1.5
1.5
1.7
1.7		 0.5
0.5
0.5
0.5		 2191
2191
2191
2191		 9804-10X
9804-20X
9804-30X
9804-40X

Flat with Frequency Models

 * 1.7 VSWR above 11 GHz

Freq
Range
(GHz)		 Atten
Range
(dB)		 Atten
vs Freq
(±dB)		  VSWR
(Max)		 Ins Loss
(Max dB)		 Standard
Form
Factor 		 Model
No.
2.5-3.0 20 1.0 1.5 0.5 3651 4813-20A
2.9-3.1
2.9-3.1		 10
20		 0.5
0.5		 1.5
1.5		 0.5
0.5		 3651
3651		 4813-10A
4813-20B
3.0-4.0 15 1.0 1.5 0.5 3651 4813-15A
3.7-4.2 20 1.0 1.5 0.5 3651 4-5813-20
4.0-8.0
4.0-8.0		 10
20		 1.0
1.5		 1.5
1.5		 0.5
0.5		 3651
3651		 5813-10
5813-20
5.4-5.9 20 0.5 1.5 0.5 3651 5813-20A
5.9-6.5 20 0.5 1.5 0.5 3651 5813-20B
7.2-7.8 30 0.5 1.5 0.5 3651 5813-30A
7.2-8.4 30 1.0 1.5 0.5 3651 5-6813-30A
7.9-8.4 30 0.5 1.5 0.5 3651 6813-30A
8.0-12.4
8.0-12.4		 10
20		 0.5
1.0		 1.5*
1.5*		 0.5
0.5		 3651
3651		 6813-10
6813-20
8.0-18.0 10 1.5 1.5* 1.0 2191 9803-10
8.5-10.5
8.5-10.5		 10
20		 0.5
0.5		 1.5
1.5		 0.5
0.5		 2191
2191		 6803-10A
6803-20A
10.0-12.0 30 0.5 1.5 0.5 2191 6803-30A
10.5-12.4
10.5-12.4		 10
20		 0.5
0.5		 1.6
1.6		 0.5
0.5		 2191
2191		 6803-10B
6803-20B
12.0-18.0 10 1.0 1.5 0.5 2191 9803-10A


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