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Pressure Windows

Waveguide Pressure Windows

Waveguide Pressure Sealing Windows

ATM manufactures Waveguide Pressure Windows for rectangular waveguide and double ridge waveguide to keep contaminants out and provide an efficient seal at pressures as high as 70 psi.  ATM pressure windows offer substantial price and performance advantages because of their manufacturing method and material content.  Unlike conventional pressure windows, they are made from the highest quality, copper-clad, Teflon fiber glass or Vacuum tight material.  

The compensated pressure window area is formed by precision photo-etching.  The resulting material has excellent pressure sealing capability and withstands temperature from -40°C to +120°C and shock extremes of the order encountered in missile and aerospace applications.  Standard rectangular waveguide window sizes WR28 through WR284, and double ridge waveguide window sizes WRD750 thru WRD200 are readily available.  Performance characteristics are listed in the charts below.

Rectangular Waveguide Pressure Windows
Rectangular Waveguide Pressure Windows
Rectangular Waveguide Pressure Windows
WG Size Freq. (GHz)   VSWR
max		 Pwr
(Watts)
-CW		 Pwr
(kW)
-Peak		 Pres.
(PSIG)		 Material Standard Model No.* Thick
 A**
(In)		 Otln. Typical
Data
WR340 2.20-3.30 1.06 1800 3500 15

Teflon Fiber Glass

 340-230-2-2 0.25    
WR284 2.60-3.95 1.06 1300 2000 15 284-230-6-6 0.25    
WR229 3.30-4.90 1.07 1300 1800 20 229-230-2-2 0.25    
WR187 3.95-5.85 1.06 1300 1500 25 187-230-6-6 0.25  .pdf  
WR159 4.90-7.05 1.05 1200 1000 30 159-230-2-2 0.25    
WR137 5.85-8.20 1.07 1000 750 35 137-230-2-2 0.25    
WR112 7.05-10.0 1.10 1000 500 40 112-230-6-6 0.25    
WR102 7.00-11.0 1.15 1000 400 40 102-230-6-6 0.25    
WR90 8.20-12.4 1.10 900 300 40 90-230-6-6 0.16    
WR75 10.0-15.0 1.09 800 200 40 75-230-6-6 0.20 .pdf  
WR62 12.4-18.0 1.08 700 150 40 62-230-6-6 0.19 .pdf  
WR51 15.0-22.0       40 51-230-6-6 0.19 .pdf  
WR42 18.0-26.5 1.12 400 75 40 42-230-6-6 0.15    
WR34 22.0-33.0 1.15 400 60 40 34-230-6-6 0.15 .pdf  
WR28 26.5-40.0 1.18 250 45 40 28-230-6-6 0.10   Insertion-Loss 
Return-Loss
Ordering Information
Rectangular Waveguide
Pressure Windows
 WR -Mod -F1 -F2
Example part number:  112 -230 -6 -6
Waveguide Size: (WR)
WR28 thru WR340 available		      
Basic Model No.: (-Mod)
230=Teflon/Glass, 233=Vacuum Tight Material		    
Flange 1 (-F1): 1=CPRG, 2=CPRF, 6=Cover,
8=Cover Groove		  
Flange 2 (-F2): 1=CPRG, 2=CPRF, 6=Cover,
8=Cover Groove
See ATM 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.

** This dimension is based on the standard model number shown. Thickness may vary depending on flange type.  See the ATM Standard Flange page for more info.

For Window without flange assembly replace the flange type with a "W".
Example: 187-230-2-2  becomes: 187-230-W

Please note:  Rectangular waveguide windows are of Brass construction, standard.  
For aluminum construction please consult factory.

 

 

Rectangular Waveguide Vacuum Pressure Windows
Rectangular Waveguide Vacuum Tight Pressure Windows
Rectangular Waveguide Vacuum Tight Pressure Windows
WG Size Freq.
(GHz)		 VSWR
max		 Power
(Watts)
-CW		 Pressure
(PSIG)		 Material Standard
Model No.*		 Thickness
 A**
(In)		 Otln
WR284 2.60 - 3.95 1.06 1300 25 Vacuum Tight 284-233-6-6 0.25  
WR229 3.30 - 4.90 1.07 1200 25 229-233-2-2 0.25  
WR187 3.95 - 5.85 1.06 1200 25 187-233-6-6 0.25  
WR159 4.90 - 7.05 1.05 700 25 159-233-2-2 0.25  
WR137 5.85 - 8.20 1.07 500 25 137-233-2-2 0.25  
WR112 7.05 - 10.0 1.10 400 25 112-233-6-6 0.25  
WR102 7.00 - 11.0 1.15 400 25 102-233-6-6 0.25  
WR90 8.20 - 12.4 1.10 400 25 90-233-6-6 0.16  
WR75 10.0 - 15.0 1.09 375 25 75-233-6-6 0.20  
WR62 12.4 - 18.0 1.08 375 25 62-233-6-6 0.19  
WR51 15.0 - 22.0 1.12 350 25 51-233-6-6 0.19 .pdf
WR42 18.0 - 26.5 1.12 320 25 42-233-6-6 0.15  
WR34 22.0 - 33.0 1.15 250 25 34-233-6-6 0.15  
WR28 26.5 - 40.0 1.18 100 25 28-233-6-6 0.10  
Ordering Information
Rectangular Waveguide
Vacuum Tight Pressure Windows
 WR -Mod -F1 -F2
Example part number:  112 -233 -6 -6
Waveguide Size: (WR)
WR28 thru WR284 available		      
Basic Model No.: (-Mod)
230=Teflon/Glass, 233=Vacuum Tight Material		    
Flange 1 (-F1): 1=CPRG, 2=CPRF, 6=Cover,
8=Cover Groove		  
Flange 2 (-F2): 1=CPRG, 2=CPRF, 6=Cover,
8=Cover Groove
See ATM 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.

** This dimension is based on the standard model number shown. Thickness may vary depending on flange type.  See the ATM Standard Flange page for more info.

For Window without flange assembly replace the flange type with a "W".
Example: 187-233-2-2  becomes: 187-233-W

Please note:  Rectangular Waveguide Windows are of Brass construction, standard.  
For aluminum construction please consult factory.

 

Double Ridge Waveguide Pressure Windows
WG Size Freq. (GHz) VSWR
max		 RF Power*** Pressure
(PSIG)		 Material Standard
Model No.*		 Thick
A**
(In)		 Outline
Dwgs
Avg. CW
(Watts)		 Peak
(kW)
WRD200 2.00 - 4.80 1.09 600 1 25 Vacuum Tight 200-233-C3-C3 0.25 Dwg
WRD250 2.50 - 7.80 1.09 600 1 25 Vacuum Tight 250-233-C3-C3 0.31 Dwg
WRD350 3.50 - 8.20 1.09 600 1 25 Vacuum Tight 350-233-C3-C3 0.25 Dwg
WRD475 4.75 - 11.0 1.09 600 1 25 Vacuum Tight 475-233-C3-C3 0.25 Dwg
WRD650 6.50 - 18.2 1.09 600 1 25 Vacuum Tight 650-233-C3-C3 0.25  
WRD750 7.50 - 18.0 1.09 600 1 25 Vacuum Tight 750-233-C3-C3 0.25  
WRD750 7.50 - 18.0 1.09 600 1 15 Teflon/glass 750-230-C3-C3 0.25  
Ordering Information
Double Ridge Waveguide
Pressure Windows
 WRD -Mod -F1 -F2
Example part number:  750 -233 -C3 -C3
Waveguide Size: (WRD)
WRD750 thru WRD200 available		      
Basic Model No.: (-Mod)
230=Teflon/Glass, 233=Vacuum Tight Material		    
Flange 1 (-F1): C=Cover, G=Groove
1=Alternate Tap, 2=All Tapped, 3=All Thru		  
Flange 2 (-F2): C=Cover, G=Groove
1=Alternate Tap, 2=All Tapped, 3=All Thru
See ATM 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.

** This dimension is based on the standard model number shown. Thickness may vary depending on flange type.  See the ATM Standard Flange page for more info.

*** Units tested up to 50,000 ft. altitude.

For Window without flange assembly replace the flange type with a "W".
Example: 750-233-C1-C1  becomes: 750-233-W

Please note:  Double Ridge Waveguide Windows are of Brass construction, standard.  
For aluminum construction please consult factory.