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Fixed Low Power

Waveguide Fixed Attenuators - Low Power

Fixed Low Power Waveguide Attenuators

Narda-MITEQ offers a series of rectangular waveguide attenuators covering the waveguide sizes WR-28 through WR-650 and attenuation values of 3dB, 6dB, 10dB, 20dB and 30dB (other attenuation values available, consult factory for details).  

The assembly construction includes a precision element for optimum electrical performance, but note that Attenuation vs. Frequency can vary greatly depending on the attenuation at a given frequency. 

Waveguide Fixed Attenuators with normal and high power units are also available. For more information feel free to call us and discuss your needs with one of our design engineers.

Rectangular Waveguide Fixed Attenuators - Low Power
Rectangular Waveguide Fixed Attenuator Rectangular Waveguide Fixed Attenuator - Diagram
WG Size Freq. (GHz) VSWR
max		 Power
Watt		 Calibration
Frequency*		 Standard
Model No.
 Length (L)
Inches
WR650 1.12 - 1.70 1.15 11 1.40 650-600A-dB-2-2 25.0
WR430 1.70 - 2.60 1.15 11 2.20 430-600A-dB-2-2 22.0
WR340 2.20 - 3.30 1.15 11 2.75 340-600A-dB-2-2 18.0
WR284 2.60 - 3.95 1.15 11 3.20 284-600A-dB-6-6 10.0
WR229 3.30 - 4.90 1.15 9 4.00 229-600B-dB-2-2 9.0
WR187 3.95 - 5.85 1.15 7 4.90 187-600A-dB-6-6 8.5
WR159 4.9 - 7.05 1.15 5 6.10 159-600B-dB-2-2 8.0
WR137 5.85 - 8.20 1.15 4 7.00 137-600B-dB-2-2 6.0
WR112 7.05 - 10.0 1.15 3 8.50 112-600B-dB-6-6 5.0
WR90 8.20 - 12.4 1.15 2 10.30 90-600A-dB-6-6 4.0
WR75 10.0 - 15.0 1.15 1 12.50 75-600B-dB-6-6 3.0
WR62 12.4 - 18.0 1.15 1 15.00 62-600B-dB-6-6 3.0
WR51 15.0 - 22.0 1.15 1 18.00 51-600B-dB-6-6 3.0
WR42 18.0 - 26.5 1.15 1 22.00 42-600B-dB-6-6 3.0
WR34 22.0 - 33.0 1.20 1 27.00 34-600B-dB-6-6 3.0
WR28 26.5 - 40.0 1.20 1 33.00 28-600B-dB-6-6 3.0
* To change calibration frequency add desired frequency after the model number as shown in the following example: 159-600B-dB-2-2 becomes: 159-600B-dB-2-2/5.1 when a calibration frequency of 5.1(GHz) is desired.
Ordering Information
Waveguide Fixed Attenuators
Low Power		 WR -Mod M -dB -F1 -F2
Example part number:  284 -600 A -20 -6 -6
Waveguide Size: (WR)
WR28 thru WR650 available		          
Basic Model No.: (-Mod)        
Material (M): A=Aluminum, B=Brass, C=Copper      
Attenuation (-dB) in dB 3, 6, 10, 20, 30 **      
Flange 1 (-F1): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke, 8=Cover Groove  
Flange 2 (-F2): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke, 8=Cover Groove
See Narda-MITEQ Standard Flange page for more info. 

* The Standard Model Numbers above are the most common parts ordered for size, material and flange. However, these models can easily be altered for your needs by using the Model # code system to the left.

** Choose the attenuation value appropriate for application (3dB, 6dB, 10dB, 20dB, or 30dB) and insert it in the model number where dB is listed.
Example P/N: 284-600A-20-6-6 is:
WG size WR284 / Aluminum / 20dB Attenuation / Cover Flange / Cover Flange*