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Fixed Precision

Waveguide Fixed Precision Attenuators - Low Power

Precision Waveguide Fixed Attenuators

Narda-MITEQ offers a series of rectangular waveguide precision attenuators covering the waveguide sizes WR28 through WR430 and attenuation values of 10dB, 20dB, 30dB, 40dB and 50dB.  

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. 

For more information feel free to call us and discuss your needs with one of our design engineers.

Waveguide Fixed Precision Attenuators
 

Low Power Precision Attenuator

Waveguide Precision Fixed Attenuator - Diagram

 GENERAL SPECIFICATIONS

Electrical
Std. Attenuation values: 10, 20, 30, 40, 50dB
Nominal Attenuation accuracy: +/- 0.50dB
(+/- 0.75dB for WR42, WR34, WR28)
Freq. Sensitivity: +/- 0.60 dB
(+/- 0.75dB for WR42, WR34, WR28)
Mechanical
Size: See Tables
Body: Aluminum/Copper Brass
Finish: Unique corrosion resistant 316 stainless steel epoxy coating IAW MIL-F-14072
Applicable Mil-Specs
General:
Product Specific:
WG Size Freq GHz Power
Watts		 VSWR Standard
Model No.*		 Dimensions
Length (L)
Inches		 Offset (O)
Inches
WR430 1.70 - 2.60 15 1.08 430-630A-dB-2-2 54.0 2.230
WR340 2.20 - 3.30 12 1.08 340-630A-dB-2-2 42.0 1.780
WR284 2.60 - 3.95 10 1.08 284-630A-dB-6-6 33.0 1.420
WR229 3.30 - 4.90 10 1.08 229-630A-dB-2-2 27.0 1.209
WR187 3.95 - 5.85 8 1.08 187-630A-dB-6-6 24.0 0.936
WR159 4.9 - 7.05 7 1.08 159-630A-dB-2-2 24.0 0.859
WR137 5.95 - 8.20 6 1.08 137-630A-dB-2-2 18.5 0.814
WR112 7.05 - 10.0 4 1.08 112-630A-dB-6-6 16.0 0.561
WR90 8.20 - 12.4 4 1.08 90-630A-dB-6-6 14.5 0.450
WR75 10.0 - 15.0 2 1.08 75-630A-dB-6-6 13.5 0.425
WR62 12.4 - 18.0 1.5 1.08 62-630A-dB-6-6 11.5 0.351
WR51 15.0 - 22.0 1.0 1.08 51-630A-dB-6-6 11.5 0.295
WR42 18.0 - 26.5 0.5 1.08 42-630A-dB-6-6 9.5 0.210
WR34 22.0 - 33.0 0.5 1.08 34-630A-dB-6-6 9.5 0.210
WR28 26.5 - 40.0 0.5 1.08 28-630A-dB-6-6 9.0 0.180

*Insert desired attenuation value (10, 20, 30, 40, or 50dB) in the model number where dB is listed
Ordering Information
Waveguide Fixed Attenuators
Precision		 WR -Mod M -dB -F1 -F2
Example part number:  284 -630 A -20 -6 -6
Waveguide Size: (WR)
WR28 thru WR430 available		          
Basic Model No.: (-Mod)        
Material (M): A=Aluminum, B=Brass, C=Copper      
Attenuation (-dB) in dB 10, 20, 30, 40, 50 **      
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 (10dB, 20dB, 30dB, 40dB, or 50dB) and insert it in the model number where dB is listed.
Example P/N: 284-630A-20-6-6 is:
WG size WR284 / Aluminum / 20dB Attenuation / Cover Flange / Cover Flange*