Products

Double Ridge Waveguide Terminations

Frontgrade offers a wide range of precision double ridge waveguide terminations to absorb energy and prevent signal loss within your designs.

With a variety of models supporting virtually all waveguide applications, Frontgrade Waveguide Terminations provide best-in-class VSWR performance and support a variety of frequency ranges. 

Frontgrade's Double Ridge Terminations portfolio includes low power terminations (precision and short length); low-medium power terminations; medium power terminations and high powered terminations (air cooled and water cooled). We also offer mismatched high power terminations for double ridge waveguides.

Low Power Precision Terminations

Frontgrade's Low Power Precision Terminations are constructed of 6061 aluminum bodies and flanges. They use custom machined load elements for optimum electrical performance. VSWR is less than 1.05 for most models.

Model NumberWaveguide SizeFrequency Range
(GHz)
Power
(Watts)
Dimension A
PLPT180WRD - 180C2418.00 - 40.0024.00
PLPT110WRD - 110C2411.00 - 26.5026.00
PLPT750 WRD - 750D247.50 - 18.0058.80
PLPT650 WRD - 650D286.50 - 18.0058.80
PLPT580 WRD - 580D285.80 - 16.0058.80
PLPT475 WRD - 475D244.75 - 11.00512.80
PLPT350 WRD - 350D243.50 - 8.20 1013.80
PLPT250 WRD - 250D302.60 - 7.80 1015.00

Low-Medium Power Terminations

Frontgrade's Low-Medium Power Terminations feature aluminum bodies and flanges while using custom machined load elements for optimum electrical performance. This series of terminations is designed for low-medium power inputs, with typical VSWR of less than 1.15.

Model NumberWaveguide SizeFrequency Range
(GHz)
PWR.Max
(Watts-CW):A
PWR.Max
(Watts-CW):B
Air Flow
(CFM)
Dimension A
LMPT180 WRD - 180C2418.00 - 40.0057113.00354.50
LMPT110 WRD - 110C2411.00 - 26.5082165.00356.63
LMPT750 WRD - 750D247.50 - 18.00125250.00359.50
LMPT650WRD - 650D286.50 - 18.00127250.00359.50
LMPT580 WRD - 580D285.80 - 16.00149273.00359.50
LMPT475 WRD - 475D244.75 - 11.00326652.007012.25
LMPT350 WRD - 350D243.50 - 8.20484938.007013.75
LMPT250 WRD - 250D302.60 - 7.805191005.007013.75

Medium Power Terminations

Frontgrade's Medium Power Terminations are manufactured with heavy wall 6061 waveguide and extruded heat sink material. The load material is custom ground silicon carbide tapered for optimum VSWR response of less than 1.15 while maintaining moderate power handling characteristics.

Model NumberWaveguide SizeFrequency Range
(GHz)
PWR.Max
(Watts-CW):A
PWR.Max
(Watts-CW):B
Air Flow
(CFM)
Dimension:ADimension:BDimension:C
MPT180WRD - 180C2418.00 - 40.0065124354.500.881.14
MPT110WRD - 110C2411.00 - 26.5092176356.631.111.37
MPT750WRD - 750D247.50 - 18.00250480359.501.452.43
MPT650WRD - 650D286.50 - 18.00254480359.501.452.43
MPT580WRD - 580D285.80 - 16.00263500359.501.452.48
MPT475WRD - 475D244.75 - 11.004418337012.251.943.63
MPT350WRD - 350D243.50 - 8.2051710007013.752.774.35
MPT250WRD - 250D302.60 - 7.8068213647013.752.774.38

High Power Terminations

Frontgrade's High Power Terminations utilize heavy wall 6061 aluminum and extruded heat sink material construction. The load element is custom ground silicon carbide shaped for optimum power handling and heat transfer while maintaining 1.15 maximum VSWR.

Model NumberWaveguide SizeFrequency Range
(GHz)
PWR.Max
(Watts-CW):A
PWR.Max
(Watts-CW):B
Air Flow
(CFM)
Dimension:ADimension:BDimension:C
HPT180 WRD - 180C2418.00 - 40.0090128354.502.242.08
HPT110 WRD - 110C2411.00 - 26.50128232356.632.722.67
HPT750 WRD - 750D247.50 - 18.00350595359.503.83.43
HPT650 WRD - 650D286.50 - 18.00357595359.503.833.43
HPT580 WRD - 580D285.80 - 16.00366595359.503.893.48
HPT475 WRD - 475D244.75 - 11.0062510627012.254.654.08
HPT350 WRD - 350D243.50 - 8.2078915007013.755.384.59
HPT250 WRD - 250D302.60 - 7.80100015007013.755.564.62

High Power Air Cooled Terminations

Frontgrade's High Power Air Cooled Terminations are composed of heavy wall 6061 aluminum and extruded heat sink material. The load element is custom ground silicon carbide shaped for optimum power handling and heat transfer while maintaining 1.15 maximum VSWR. This series of terminations is designed with a cooling fan to enhance heat dissipation and increase power handling performance.

Model NumberWaveguide SizeFrequency Range
(GHz)
Air Flow
(CFM)
PWR.Max
(Watts-CW)
Dimension:ADimension:BDimension:C
HPTAC180 WRD - 180C2418.00 - 40.00351287.53.143.14
HPTAC110 WRD - 110C2411.00 - 26.50352329.633.143.14
HPTAC750 WRD - 750D247.50 - 18.003559512.53.803.43
HPTAC650 WRD - 650D286.50 - 18.003559512.53.833.43
HPTAC580 WRD - 580D285.80 - 16.003559512.53.893.48
HPTAC475 WRD - 475D244.75 - 11.0070106215.854.694.69
HPTAC350 WRD - 350D243.50 - 8.2070150017.355.384.69
HPTAC250 WRD - 250D302.60 - 7.8070150017.355.564.69

High Power Water Cooled Terminations

Frontgrade's High Power Water Cooled Terminations are comprised of aluminum bodies and flanges and use custom machined silicon carbide load elements shaped for optimum power handling and heat transfer. VSWR is maintained at 1.15 maximum. This series of terminations is designed with input/output ports for water circulation, to enhance heat dissipation and increase power handling performance.

Model NumberWaveguide SizeFrequency Range
(GHz)
PWR.Max
(Watts-CW)
Dimension:ADimension:BDimension:CDimension:D
HPTW180 WRD - 180C2418.00 - 40.001684.501.401.000.50
HPTW110 WRD - 110C2411.00 - 26.503006.631.401.250.50
HPTW750 WRD - 750D247.50 - 18.006759.501.751.250.50
HPTW650 WRD - 650D286.50 - 18.006759.501.751.250.50
HPTW580 WRD - 580D285.80 - 16.006759.501.751.250.50
HPTW475 WRD - 475D244.75 - 11.0093812.251.751.251.00
HPTW350 WRD - 350D243.50 - 8.20100013.752.001.251.00
HPTW250 WRD - 250D302.60 - 7.80100013.752.001.251.00

High Power Mismatched Terminations

Frontgrade's High Power Mismatched Terminations feature constructed aluminum waveguide and extruded heat sink material. The load element is custom machined for optimum electrical performance. These units are designed for ultra-flat return loss and are available in four standard configurations.

Model NumberWaveguide SizeFrequency Range
(GHz)
Air Flow
(CFM)
PWR.Max
(Watts-CW):A
PWR.Max
(Watts-CW):B
Dimension:ADimension:BDimension:C
HPM180 WRD - 180C2418.00 - 40.0035901284.502.242.08
HPM110 WRD - 110C2411.00 - 26.50351282326.632.722.67
HPM750 WRD - 750D247.50 - 18.00353505959.503.803.43
HPM650 WRD - 650D286.50 - 18.00353575959.503.833.43
HPM580 WRD - 580D285.80 - 16.00353665959.503.893.48
HPM475 WRD - 475D244.75 - 11.0070625106212.254.654.08
HPM350 WRD - 350D243.50 - 8.2070789150013.755.384.59
HPM250 WRD - 250D302.60 - 7.80701000150013.755.564.62

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Double Ridge Waveguide Terminations