Waveguide Pressure Windows

  See Also:
ATM Standard Flange Information

 

 


 

ATM waveguide pressure windows keep contaminants out and provide an efficient seal at pressures as high as 70 psi.  They 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.     The compensated 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 waveguide window sizes 28 through 284 are readily available.  Performance characteristics are listed in the specification chart. 
 

 

Rectangular W/G Pressure Windows
WG Size Freq. (GHz) VSWR
max
Power
(Watts)-
CW
Power
(kW)-Peak
Pressure
(PSIG)
Material Standard
Model No.
*
Thickness
 A
**
(In)
Outline
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 Teflon Fiber Glass 284-230-6-6 0.25  
WR229 3.30 - 4.90 1.07 1300 1800 20 Teflon Fiber Glass 229-230-2-2 0.25  
WR187 3.95 - 5.85 1.06 1300 1500 25 Teflon Fiber Glass 187-230-6-6 0.25  
WR159 4.90 - 7.05 1.05 1200 1000 30 Teflon Fiber Glass 159-230-2-2 0.25  
WR137 5.85 - 8.20 1.07 1000 750 35 Teflon Fiber Glass 137-230-2-2 0.25  
WR112 7.05 - 10.0 1.10 1000 500 40 Teflon Fiber Glass 112-230-6-6 0.25  
WR102 7.0 - 11.0 1.15 1000 400 40 Teflon Fiber Glass 102-230-6-6 0.25  
WR90 8.20 - 12.4 1.10 900 300 40 Teflon Fiber Glass 90-230-6-6 0.16  
WR75 10.0 - 15.0 1.09 800 200 40 Teflon Fiber Glass 75-230-6-6 0.20 .pdf
WR62 12.4 - 18.0 1.08 700 150 40 Teflon Fiber Glass 62-230-6-6 0.187 .pdf
WR42 18.0 - 26.5 1.12 400 75 40 Teflon Fiber Glass 42-230-6-6 0.15  
WR34 22.0 - 33.0 1.15 400 60 40 Teflon Fiber Glass 34-230-6-6 0.15 .pdf
WR28 26.5 - 40.0 1.18 250 45 40 Teflon Fiber Glass 28-230-6-6 0.10  
Ordering Information WR - Mod - F1 - F2
W/G Pressure window        

Example part number: 

112 -230 -6 -6
Waveguide Size: (WR)
WR28 thru WR284 available
       
Basic Model No.: (-Mod)        
Flange 1 (-F2): 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 and flange type. However, these models can easily be altered to accommodate 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 W/G Vacuum Pressure Windows
WG Size Freq. (GHz) VSWR
max
Power
(Watts)-CW
Pressure
(PSIG)
Material Standard
Model No.
*
Thickness
 A
**
(In)
WR284 2.60 - 3.95 1.06 1300 15 Kapton 284-233-6-6 0.25
WR229 3.30 - 4.90 1.07 1200 15 Kapton 229-233-2-2 0.25
WR187 3.95 - 5.85 1.06 1200 15 Kapton 187-233-6-6 0.25
WR159 4.90 - 7.05 1.05 700 15 Kapton 159-233-2-2 0.25
WR137 5.85 - 8.20 1.07 500 15 Kapton 137-233-2-2 0.25
WR112 7.05 - 10.0 1.10 400 15 Kapton 112-233-6-6 0.25
WR102 7.0 - 11.0 1.15 400 15 Kapton 102-233-6-6 0.25
WR90 8.20 - 12.4 1.10 400 15 Kapton 90-233-6-6 0.16
WR75 10.0 - 15.0 1.09 375 15 Kapton 75-233-6-6 0.20
WR62 12.4 - 18.0 1.08 375 15 Kapton 62-233-6-6 0.19
WR51 15.0 - 22.0 1.12 350 15 Kapton 51-233-6-6 0.18
WR42 18.0 - 26.5 1.12 320 15 Kapton 42-233-6-6 0.18
WR34 22.0 - 33.0 1.15 250 15 Kapton 34-233-6-6 0.18
WR28 26.5 - 40.0 1.18 100 15 Kapton 28-233-6-6 0.18
Ordering Information WR - Mod - F1 - F2
W/G Pressure window        

Example part number: 

112 -233 -6 -6
Waveguide Size: (WR)
WR28 thru WR284 available
       
Basic Model No.: (-Mod)        
Flange 1 (-F2): 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 and flange type. However, these models can easily be altered to accommodate 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: 187-230-W

 

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

 

 


Double Ridge W/G Pressure Windows

WG Size Freq. (GHz) VSWR
max
RF Power*** Pressure
(PSIG)
Material Standard
Model No.*
Thickness A**
(In)
Outline
Avg. CW
(Watts)
Peak (kW)
WRD200 2.00 - 4.80 1.09 600 1 15 Kapton 200-233-C3-C3 0.25 .pdf
WRD250 2.50 - 7.80 1.09 600 1 15 Kapton 250-233-C3-C3 0.31 .pdf
WRD350 3.50 - 8.20 1.09 600 1 15 Kapton 350-233-C3-C3 0.25 .pdf
WRD475 4.75 - 11.0 1.09 600 1 15 Kapton 475-233-C3-C3 0.25 .pdf
WRD650 6.50 - 18.2 1.09 600 1 15 Kapton 650-233-C3-C3 0.25  
WRD750 7.50 - 18.0 1.09 600 1 15 Kapton 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 WRD - Mod - F1 - F2
Double Ridge W/G Pressure window        

Example part number: 

750 -230 -C3 -C3
Waveguide Size: (WRD)
WRD750 thru WRD200 available
       
Basic Model No.: (-Mod)        
Flange 1 (-F1) see table below for choices    
Flange 2 (-F2) see table below for choices
See ATM Standard Flange page for more info.
 

 

FLANGE DESIGNATION & TYPE

DESIGNATION TYPE HOLES
- C1 COVER ALTERNATE TAP/THRU
- C2 ALL TAPPED
- C3 ALL THRU
- G1 GROOVE ALTERNATE TAP/THRU
- G2 ALL TAPPED
- G3 ALL THRU

*The Standard Model Numbers above are the most common parts ordered for size and flange type. However, these models can easily be altered to accommodate 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: 750-230-C1-C1  becomes: 750-230-W

 

 


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