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The Proven Leaders
Since 1957
for RF and Microwave Components

For over 60 years ARRA (Antenna & Randome Research Associates) has been a global innovator in designing, manufacturing, distribution of coaxial and waveguide components. Supplying dependable, cost effective solutions to commercial and military customers worldwide. Our vast products line includes: Attenuators, DC Blocks, Couplers, Power Dividers, Combiners, Line Stretchers, Phase Shifters, PIN Diode Switches, Waveguides, Adapters, shorts, Pressure Windows, Twists, Bends, Horns and Terminations.
 
With our extensive Coaxial and Waveguide product offering of over 2,000 basic designs, ARRA has the ability to customize or modify components to your specific specifications in our modern 20,000 sq foot facility.
 
ARRA maintains a quality assurance and inspection program which meets or exceeds the requirements of MIL-Q-9858A and MIL-I-45208, as well as Space and NASA requirements. ARRA quality process follows the ISO 9001 guidelines to ensure the highest level of reliability.

Coaxial Components

ARRA offers a wide range of coaxial components for RF and microwave applications, including for broadband use, for narrowband systems, for low power use, and for high-power requirements.

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Custom Products

ARRA has been supplying dependable, field proven, Customized Microwave and RF Components for over 50 years.  We strive to exceed typical specifications as well provide the fastest delivery possible.

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ARRA Variable Directional Couplers are ideal for applications requiring large dynamic attenuated output from the secondary line with minimum main line loss. These units are particularly useful in amplitude monitoring loops, AGC loops and mixer applications.
As in all directional couplers, the main line is isolated from the attenuated secondary line. This type of device can withstand extremely high power levels and may be utilized as a high power continuously variable attenuator with the appropriate termination on the main line output.

GENERAL SPECIFICATIONS

  • Insertion Loss (max): 1.5 dB (Main Line),
    6.0 dB (Secondary)
  • Connectors*:SMA or Type N Female
  • VSWR (max): 1.5 after first 4 dB
  • Dial Specifications: Direct reading in 1 dB increments
  • Phase Shift: 6° typical
  • Material:Body: Aluminum
    Connectors: MIL-C-39012
  • Finish:ARRA Blue per MIL-C-22750
Frequency Range (GHz)
Attenuation Range (dB)
Attenuation vs (Freq ±dB)
RF Power (Avge W)
Form Factor
Model No. *
0.5-1.0 60 1.00 200 0-3176 2951-60
80 1.25 200 0-3176 2951-80
60 1.00 15 0-3177 2952-60
80 1.25 15 0-3177 2952-80
0.9-1.3 60 1.00 200 0-802 2-3951-60
80 1.25 200 0-802 2-3951-80
100 1.50 200 0-802 2-3951-100
60 0.50 15 0-660 2-3952-60
80 0.50 15 0-660 2-3952-80
100 0.75 15 0-660 2-3952-100
0.960-1.215 90 0.50 5 0-1212 2-3954-90
100 0.75 5 0-1212 2-3954-100
1.0-2.0 60 1.00 200 0-802 3951-60
80 1.25 200 0-802 3951-80
100 1.50 200 0-802 3951-100
60 1.00 15 0-660 3952-60X
80 1.25 15 0-660 3952-80X
100 1.50 15 0-660 3952-100X
1.4-2.4 60 1.00 200 0-802 3-4951-60
80 1.25 200 0-802 3-4951-80
100 1.50 200 0-802 3-4951-100
60 1.00 15 0-660 3-4952-60
80 1.25 15 0-660 3-4952-80
100 1.50 15 0-660 3-4952-100
2.0-4.0 60 1.00 200 0-802 4951-60
80 1.25 200 0-802 4951-80
100 1.50 200 0-802 4951-100
60 1.00 15 0-660 4952-60X
80 1.25 15 0-660 4952-80X
100 1.50 15 0-660 4952-100X
4.0-8.0 60 1.25 1 0-2366 5955-60
80 1.50 1 0-2366 5955-80
60 1.25 50 0-2366 5956-60
80 1.50 50 0-2366 5956-80
* To specify SMA connectors, suffix model number with S. Ex: 3952-60XS
To specify panel-mounted version, precede model number with P. Ex: P3952-60X
To specify dial lock option, precede model number with L. Ex: L3952-60X
Note:Units covering other bandwidths are availabe; contact factory.
Variable Coupler: 60-100 dB Ranges
Variable Coupler: 60-100 dB Ranges
Variable Coupler: 60-100 dB Ranges
Variable Coupler: 60-100 dB Ranges
Variable Coupler: 60-100 dB Ranges
Variable Coupler: 60-100 dB Ranges
Variable Coupler: 60-100 dB Ranges