Waveguide Terminations

(Dummy Loads)

  See Also:
Coax Terminations
Waveguide Shorts
Water-Cooled Waveguide Terminations
 

ATM manufactures a tremendous selection of Short, Low, Medium, and High Power Terminations for Rectangular and Double Ridge Waveguides that do not require Forced Air Cooling. Please call us and discuss your needs with one of our design engineers.


 
Rectangular W/G Termination, Low Power Small Size - 710 Series

  • Full waveguide frequency range.

  • Units pressure tested to 30 PSI.

  • Finish is a unique corrosion-resistant 316 stainless steel epoxy coating.

  • VSWR: 1.2 max.

  • ATM Series 710 Terminations utilizes Medium Power Elements to achieve low VSWR and stable electrical characteristics.
WG Size Freq. (GHz) Avg. Power
(Watts)		 Standard
Model No.*		 Dim A.
(Inches)
WR650 1.12 - 1.70 50 650-710A-2 7.00
WR430 1.70 - 2.60 40 430-710A-2 7.00
WR340 2.20 - 3.30 40 340-710A-2 6.00
WR284 2.60 - 3.95 30 284-710A-6 3.00
WR229 3.30 - 4.90 25 229-710B-2 3.00
WR187 3.95 - 5.85 25 187-710A-6 2.50
WR159 4.90 - 7.05 20 159-710B-2 2.00
WR137 5.85 - 8.20 15 137-710B-2 1.75
WR112 7.05 - 10.0 15 112-710B-6 1.50
WR102 7.00 - 11.0 15 102-710A-6 1.50
WR90 8.20 - 12.4 15 90-710A-6 1.50
WR75 10.0 - 15.0 15 75-710B-6 1.25
WR62 12.40 - 18.0 10 62-710B-6 1.00
WR51 15.0 - 22.0 10 51-710B-6 1.00
WR42 18.0 - 26.5 10 42-710B-6 1.00
WR34 22.0 - 33.0 5 34-710B-6 0.75
WR28 26.5 - 40.0 5 28-710B-6 0.75
WR22 33.0 - 50.0 5 22-710B-6 0.75
Ordering Information WR - Mod M - F
Termination, Low Power        

Example part number: 

42 -710 B -6
Waveguide Size: (WR) WR22 thru WR650        
Basic Model No.: (-Mod)        
Material (M): A=Aluminum, B=Brass        
Flange (-F): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke
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 to accommodate your needs by using the Model # code system to the left.

 
 

 

 
Rectangular W/G Termination, Low Power - 720 Series

  • Full waveguide frequency range.

  • Units pressure tested to 30 PSI.

  • Finish is a unique corrosion-resistant 316 stainless steel epoxy coating.

  • Low outgassing characteristics.

  • VSWR: See table below.

  • ATM Series 720 Terminations utilize a precision conical element to achieve very low VSWR.

WG Size Freq. (GHz) VSWR
max.		 Avg. Power
(Watts)		 Peak Power
(kW)		 Standard
Model No.*		 Dim A.
(Inches)
WR650 1.12 - 1.70 1.02 25 25 650-720A-2 12.50
WR510 1.45 - 2.20 1.02 25 25 510-720A-2 12.50
WR430 1.70 - 2.60 1.02 15 15 430-720A-2 11.00
WR340 2.20 - 3.30 1.01 12 12 340-720A-2 10.75
WR284 2.60 - 3.95 1.01 10 10 284-720A-6 10.75
WR229 3.30 - 4.90 1.01 10 10 229-720B-2 7.50
WR187 3.95 - 5.85 1.01 8 8 187-720A-6 6.25
WR159 4.90 - 7.05 1.01 7 7 159-720B-2 6.00
WR137 5.85 - 8.20 1.01 6 6 137-720B-2 5.50
WR112 7.05 - 10.0 1.01 4 4 112-720B-6 5.00
WR102 7.00 - 11.0 1.01 3 3 102-720A-6 4.00
WR90 8.2 - 12.4 1.01 4 7 90-720A-6 4.00
WR75 10.0 - 15.0 1.01 2 2 75-720B-6 4.00
WR62 12.4 - 18.0 1.01 1.5 1.5 62-720B-6 4.00
WR51 15.0 - 22.0 1.01 1.0 1.0 51-720B-6 4.00
WR42 18.0 - 26.5 1.01 0.5 0.5 42-720B-6 2.50
WR34 22.0 - 33.0 1.01 0.5 0.5 34-720B-6 2.50
WR28 26.5 - 40.0 1.02 0.5 0.5 28-720B-6 2.00
WR22 33.0 - 50.0 1.02 0.5 0.5 22-720B-6 1.75
Ordering Information WR - Mod M - F
Termination, Low Power        

Example part number: 

42 -720 B -6
Waveguide Size: (WR) WR22 thru WR650        
Basic Model No.: (-Mod)        
Material (M): A=Aluminum, B=Brass        
Flange (-F): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke
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 to accommodate your needs by using the Model # code system to the left.

 

 

 

 

Rectangular W/G Termination, Medium Power - 740 Series

  • Full waveguide frequency range.

  • Units pressure tested to 30 psi.

  • Finish: Hi-Temp black paint.

  • Low outgassing characteristics.

  • ATM Series 740 Terminations utilizes High Power Ceramic Elements fired at 1300 C to achieve low VSWR and stable electrical characteristics.

  • Units are best mounted in the horizontal plane with free air flow.  If surface temperature exceeds 300°C, we recommend forced air cooling.  Units can survive temperatures as high as 500 °C without damage for a short time.

WG Size Freq. (GHz) VSWR
Max.		 Avg. Power
(Watts)		 Peak Power
(kW)		 Standard
Model No.*		 Dim. A
(Inches)
WR650 1.12 - 1.70 1.15 1500 800 650-740A-2 13.00
WR430 1.70 - 2.60 1.15 1200 800 430-740A-2 12.00
WR340 2.20 - 3.30 1.15 1200 800 340-740A-2 12.00
WR284 2.60 - 3.95 1.10 1200 800 284-740A-6 11.00
WR229 3.30 - 4.90 1.10 1000 800 229-740B-2 9.75
WR187 3.95 - 5.85 1.10 750 750 187-740A-6 8.38
WR159 4.90 - 7.05 1.10 625 625 159-740B-2 8.00
WR137 5.85 - 8.20 1.10 500 400 137-740B-2 8.00
WR112 7.05 - 10.0 1.10 425 400 112-740B-6 7.00
WR102 7.00 - 11.0 1.10 325 300 102-740A-6 6.50
WR90 8.2 - 12.4 1.10 225 225 90-740A-6 5.50
WR75 10.0 - 15.0 1.10 200 200 75-740B-6 4.50
WR62 12.4 - 18.0 1.10 100 200 62-740B-6 3.25
WR51 15.0 - 22.0 1.10 100 120 51-740A-6 3.25
WR42 18.0 - 26.5 1.15 100 120 42-740B-6 3.50
WR34 22.0 - 33.0 1.15 75 80 34-740B-6 3.25
WR28 26.5 - 40.0 1.15 75 50 28-740B-6 4.00
WR22 33.0 - 50.0 1.15 25 20 22-740B-6 2.50
Ordering Information WR - Mod M - F
Termination, Medium Power        

Example part number: 

51 -740 A -6
Waveguide Size: (WR) WR22 thru WR650        
Basic Model No.: (-Mod)        
Material (M): A=Aluminum, B=Brass        
Flange (-F): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke
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 to accommodate your needs by using the Model # code system to the left.

 

 

 

 

Rectangular W/G Termination, High Power - 745 Series

  • Full waveguide frequency range.

  • Units pressure tested to 30 psi.

  • Low outgassing characteristics.

  • VSWR: 1.10 max.

  • ATM Series 745 Terminations utilizes High Power Ceramic Elements fired at 1300 C for low VSWR and stable electrical characteristics.

  • All series 745 Terminations are manufactured from 6061 Aluminum.

  • Finish: Hi-Temp black paint.

  • Units are best mounted in the horizontal plane with free air flow.  If surface temperature exceeds 300°C, we recommend forced air cooling.  Units can survive temperatures as high as 500 °C without damage for a short time.
WG Size Freq. (GHz) VSWR
Max.		 Avg. Power
 (Watts)		 peak Power
(kW)		 Standard
Model No.		 Dim. A
(Inches)		 Dim.
B		 Dim.
C
WR650 1.12 - 1.70 1.15 2500 800 650-745-2 13.00 11.00 9.00
WR430 1.70 - 2.60 1.15 2500 800 430-745-2 12.00 6.00 6.00
WR340 2.20 - 3.30 1.15 2500 800 340-745-2 12.00 6.00 6.00
WR284 2.60 - 3.95 1.10 2400 800 284-745-6 12.00 6.00 5.00
WR229 3.30 - 4.90 1.10 2000 800 229-745-2 10.63 5.00 5.00
WR187 3.95 - 5.85 1.10 1500 750 187-745-6 9.00 4.50 4.50
WR159 4.90 - 7.05 1.10 1300 625 159-745-2 9.00 4.50 4.50
WR137 5.85 - 8.20 1.10 1000 400 137-745-2 8.50 4.00 4.00
WR137 5.85 - 8.20 1.10 1500 400 137-745A-2 9.00 4.50 4.50
WR112 7.05 - 10.0 1.10 850 400 112-745-6 8.00 4.00 4.00
WR102 7.00 - 11.0 1.10 500 300 102-745-6 6.50 3.50 3.50
WR90 8.20 - 12.4 1.10 500 225 90-745-6 5.50 3.50 3.50
WR75 10.00 - 15.0 1.10 350 200 75-745-6 5.00 3.50 3.50
WR75 10.0 - 15.0 1.10 550 200 75-745A-6 5.00 4.50 4.50
WR62 12.4 - 18.0 1.10 250 200 62-745-6 4.50 3.00 3.00
WR51 15.0 - 22.0 1.15 250 120 51-745-6 4.13 2.25 2.25
 WR51 15.0 - 22.0 1.15 300 120 51-745A-6 4.50 3.00 3.00
WR42 18.0 - 26.5 1.15 250 120 42-745-6 4.50 2.25 2.25
WR34 22.0 - 33.0 1.15 175 80 34-745-6 4.00 2.00 2.00
WR28 26.5 - 40.0 1.15 175 50 28-745-6 4.00 2.00 2.00
WR22 33.0 - 50.0 1.15 100 20 22-745-6 3.00 1.50 1.50
Ordering Information WR - Mod - F
Termination, Medium Power      

Example part number: 

75 -745 -6
Waveguide Size: (WR) WR22 thru WR650      
Basic Model No.: (-Mod)      
Flange (-F): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke
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 to accommodate your needs by using the Model # code system to the left.

 

Note: All 745 series Terminations are aluminum construction only.

 

 

 

Rectangular W/G Termination, Very High Power - 760/780 Series

  • Full waveguide frequency.

  • Units may be pressure sealed up to 30 psi. upon request.

  • Finish: Hi-Temp black paint.

  • Low outgassing characteristics.

  • VSWR: 1.15 max.

  • Series 760 Terminations are manufactured from 6061 Aluminum.

  • ATM Series 760 Terminations utilizes High Power Ceramic Elements fired at 1300 C for low VSWR and stable electrical characteristics.

  • Units are best mounted in the horizontal plane with free air flow.  If surface temperature exceeds 300°C, we recommend forced air cooling.  Units can survive temperatures as high as 500 °C without damage for a short time.

WG Size Freq. (GHz) Avg. Power
(Watts)		 Peak
Power
(kW)		 Standard
Model No.*		 Dim. A
(Inches)		 Dim. B Dim. C Outline
Dwg.
WR650 1.12 - 1.70 8000 5500 650-760-2 30.00 14.00 12.00 Dwg
WR430 1.70 - 2.60 6500 4000 430-760-2 16.67 9.00 9.00 Dwg
WR340 2.20 - 3.30 5500 3500 340-760-2        
WR284 2.60 - 3.95 5000 3200 284-760-6 13.75 6.00 6.00 Dwg
WR229 3.30 - 4.90 4000 2000 229-760-2 13.75 6.00 6.00 Dwg
WR187 3.95 - 5.85 3000 2000 187-760-6 18.00 6.00 6.00  
WR159 4.90 - 7.05 3000 1000 159-760-2 21.50 6.00 6.00 Dwg
WR137 5.85 - 8.20 3000 710 137-760-2 18.00 6.00 6.00 Dwg
WR112 7.05 - 10.0 3000 550 112/187-760-6 20.00 6.00 6.00 Dwg
WR112 7.05 - 10.0 1900 460 112-760-6 8.80 5.00 5.00 Dwg
WR90 8.20 - 12.4 4500 450 90/187-760-6 24.00 6.00 6.00 Dwg
WR90 8.20 - 12.4 1500 290 90-760-6 9.81 5.00 5.00 Dwg
WR75 10.0 - 15.0 3500 270 75/187-760-6 24.83 6.00 6.00 Dwg
WR75 10.0 - 15.0 1400 200 75-760-6 7.75 4.50 4.50 Dwg
WR62 12.4 - 18.0 3000 200 62/187-760-6 24.63 6.00 6.00 Dwg
WR62 12.4 - 18.0 1400 160 62-760-6 7.86 4.50 4.50 Dwg
WR51 15.0 - 22.0 1200 150 51-760-6 7.75 4.50 4.50 Dwg
WR42 18.0 - 26.5 1000 120 42-760-6 5.50 2.25 2.25  
WR34 22.0 - 33.0 700 100 34-760-6 6.37 2.25 2.25 Dwg
WR28 26.5 - 40.0 300 100 28-760-6 6.56 2.25 2.25 Dwg
WR28 26.5 - 40.0 500 100 28-780-6 7.00 2.50 2.50 Dwg
WR22 33.0 - 50.0 500 100 22/28-780-6 9.00 2.50 2.50 Dwg
Ordering Information WR - Mod - F
Termination, Medium Power      

Example part number: 

75 -760 -6
Waveguide Size: (WR) WR22 thru WR650      
Basic Model No.: (-Mod)      
Flange (-F): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke
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 to accommodate your needs by using the Model # code system to the left.

 

Note: All 780 Series Terminations are aluminum construction only.

 

 

 

Double Ridge W/G Termination, Low & Med. Power  - 720/740 Series

WG Size Freq. (GHz) Standard
Model No.		 Avg. Power
 (Watts)		 Typical
VSWR		 Dim A
(Inches)		 Outline
WRD350 3.50-8.20 350-720-C3 1 1.05 13 .pdf
WRD350 3.50-8.20 350-740-C3 300 1.10 13 .pdf
WRD475 4.75-11.0 475-720-C3 1 1.05 8.50  
WRD475 4.75-11.0 475-740-C3 240 1.10 8.50  
WRD580 5.80-16.0 580-720-C3 1 1.05 8.50  
WRD580 5.80-16.0 580-740-C3 200 1.10 8.50  
WRD650 6.50-18.0 650-720-C3 1 1.05 7.50  
WRD650 6.50-18.0 650-740-C3 200 1.10 8.50  
WRD750 7.50-18.0 750-720-C3 1 1.05 8.50  
WRD750 7.50-18.0 750-740-C3 200 1.10 8.50 .pdf
WRD180 18.00-40.0 180-720-C3 1 1.15 4.00  
WRD180 18.00-40.0 180-740-C3 30 1.15 4.00  

Units are best mounted in the horizontal plane with free air flow.  If surface temperature exceeds 300°C, we recommend forced air cooling.  Units can survive temperatures as high as 500 °C without damage for a short time.
Flange Code: C=Flat, G=Groove, 1=alternate holes, 2=all tapped holes, 3=all thru holes
Example 580-720-G1, Other Flanges Available

 

 

Double Ridge W/G Terminations, High Power - 745 Series

WG Size Freq. (GHz) Standard
Model No.		 Avg. Power
 (Watts)		 VSWR Dim A
(Inches)		 Dim B Outline
WRD475 4.75-11.0 475-745-C3 1000 1.10 12.00 6.00  
WRD580 5.80-16.0 580-745A-C3 1000 1.10 9.50 5.00 Dwg
WRD580 5.80-16.0 580-745-C3 750 1.10 9.50 5.00 Dwg
WRD650 6.50-18.0 650-745-C3 700 1.10 10.00 5.00 Dwg
WRD750 7.50-18.0 750-745-C3 700 1.10 10.00 5.00 Dwg

Units are best mounted in the horizontal plane with free air flow.  If surface temperature exceeds 300°C, we recommend forced air cooling.  Units can survive temperatures as high as 500 °C without damage for a short time.
Flange Code: C=Flat, G=Groove, 1=alternate holes, 2=all tapped holes, 3=all thru holes
Example 580-720-G1, Other Flanges Available

 

 

Double Ridge W/G Terminations, Very High Power - 760/780 Series
WG Size Freq. (GHz) Standard
Model No.		 Avg. Power
 (CW)		 VSWR Dim A Dim B Outline
WRD250 2.5-7.5 250-780-1000-C3 1000 1.15      
WRD750 7.5-18.0 750-780-1500-C3 1500 1.15 22.00 3.00 .pdf
WRD580 5.8-16.0 580-780-1500-C3 1500 1.15 22.00 3.00
WRD650 6.5-18.0 650-780-1500-C3 1500 1.15 22.00 3.00
WRD180 18.0-40.0 180-780-150-C3 150 1.15 10.0 2.50 .pdf

Units are best mounted in the horizontal plane with free air flow.  If surface temperature exceeds 300°C, we recommend forced air cooling.  Units can survive temperatures as high as 500 °C without damage for a short time.
Flange Code: C=Flat, G=Groove, 1=alternate holes, 2=all tapped holes, 3=all thru holes

 

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