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 Number Waveguide Size Frequency Range
(GHz)		 Power
(Watts)		 Dimension A
PLPT180 WRD - 180C24 18.00 - 40.00 2 4.00
PLPT110 WRD - 110C24 11.00 - 26.50 2 6.00
PLPT750 WRD - 750D24 7.50 - 18.00 5 8.80
PLPT650 WRD - 650D28 6.50 - 18.00 5 8.80
PLPT580 WRD - 580D28 5.80 - 16.00 5 8.80
PLPT475 WRD - 475D24 4.75 - 11.00 5 12.80
PLPT350 WRD - 350D24 3.50 - 8.20 10 13.80
PLPT250 WRD - 250D30 2.60 - 7.80 10 15.00

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 Number Waveguide Size Frequency Range
(GHz)		 PWR.Max
(Watts-CW):A		 PWR.Max
(Watts-CW):B		 Air Flow
(CFM)		 Dimension A
LMPT180 WRD - 180C24 18.00 - 40.00 57 113.00 35 4.50
LMPT110 WRD - 110C24 11.00 - 26.50 82 165.00 35 6.63
LMPT750 WRD - 750D24 7.50 - 18.00 125 250.00 35 9.50
LMPT650 WRD - 650D28 6.50 - 18.00 127 250.00 35 9.50
LMPT580 WRD - 580D28 5.80 - 16.00 149 273.00 35 9.50
LMPT475 WRD - 475D24 4.75 - 11.00 326 652.00 70 12.25
LMPT350 WRD - 350D24 3.50 - 8.20 484 938.00 70 13.75
LMPT250 WRD - 250D30 2.60 - 7.80 519 1005.00 70 13.75

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 Number Waveguide Size Frequency Range
(GHz)		 PWR.Max
(Watts-CW):A		 PWR.Max
(Watts-CW):B		 Air Flow
(CFM)		 Dimension:A Dimension:B Dimension:C
MPT180 WRD - 180C24 18.00 - 40.00 65 124 35 4.50 0.88 1.14
MPT110 WRD - 110C24 11.00 - 26.50 92 176 35 6.63 1.11 1.37
MPT750 WRD - 750D24 7.50 - 18.00 250 480 35 9.50 1.45 2.43
MPT650 WRD - 650D28 6.50 - 18.00 254 480 35 9.50 1.45 2.43
MPT580 WRD - 580D28 5.80 - 16.00 263 500 35 9.50 1.45 2.48
MPT475 WRD - 475D24 4.75 - 11.00 441 833 70 12.25 1.94 3.63
MPT350 WRD - 350D24 3.50 - 8.20 517 1000 70 13.75 2.77 4.35
MPT250 WRD - 250D30 2.60 - 7.80 682 1364 70 13.75 2.77 4.38

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 Number Waveguide Size Frequency Range
(GHz)		 PWR.Max
(Watts-CW):A		 PWR.Max
(Watts-CW):B		 Air Flow
(CFM)		 Dimension:A Dimension:B Dimension:C
HPT180 WRD - 180C24 18.00 - 40.00 90 128 35 4.50 2.24 2.08
HPT110 WRD - 110C24 11.00 - 26.50 128 232 35 6.63 2.72 2.67
HPT750 WRD - 750D24 7.50 - 18.00 350 595 35 9.50 3.8 3.43
HPT650 WRD - 650D28 6.50 - 18.00 357 595 35 9.50 3.83 3.43
HPT580 WRD - 580D28 5.80 - 16.00 366 595 35 9.50 3.89 3.48
HPT475 WRD - 475D24 4.75 - 11.00 625 1062 70 12.25 4.65 4.08
HPT350 WRD - 350D24 3.50 - 8.20 789 1500 70 13.75 5.38 4.59
HPT250 WRD - 250D30 2.60 - 7.80 1000 1500 70 13.75 5.56 4.62

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 Number Waveguide Size Frequency Range
(GHz)		 Air Flow
(CFM)		 PWR.Max
(Watts-CW)		 Dimension:A Dimension:B Dimension:C
HPTAC180 WRD - 180C24 18.00 - 40.00 35 128 7.5 3.14 3.14
HPTAC110 WRD - 110C24 11.00 - 26.50 35 232 9.63 3.14 3.14
HPTAC750 WRD - 750D24 7.50 - 18.00 35 595 12.5 3.80 3.43
HPTAC650 WRD - 650D28 6.50 - 18.00 35 595 12.5 3.83 3.43
HPTAC580 WRD - 580D28 5.80 - 16.00 35 595 12.5 3.89 3.48
HPTAC475 WRD - 475D24 4.75 - 11.00 70 1062 15.85 4.69 4.69
HPTAC350 WRD - 350D24 3.50 - 8.20 70 1500 17.35 5.38 4.69
HPTAC250 WRD - 250D30 2.60 - 7.80 70 1500 17.35 5.56 4.69

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 Number Waveguide Size Frequency Range
(GHz)		 PWR.Max
(Watts-CW)		 Dimension:A Dimension:B Dimension:C Dimension:D
HPTW180 WRD - 180C24 18.00 - 40.00 168 4.50 1.40 1.00 0.50
HPTW110 WRD - 110C24 11.00 - 26.50 300 6.63 1.40 1.25 0.50
HPTW750 WRD - 750D24 7.50 - 18.00 675 9.50 1.75 1.25 0.50
HPTW650 WRD - 650D28 6.50 - 18.00 675 9.50 1.75 1.25 0.50
HPTW580 WRD - 580D28 5.80 - 16.00 675 9.50 1.75 1.25 0.50
HPTW475 WRD - 475D24 4.75 - 11.00 938 12.25 1.75 1.25 1.00
HPTW350 WRD - 350D24 3.50 - 8.20 1000 13.75 2.00 1.25 1.00
HPTW250 WRD - 250D30 2.60 - 7.80 1000 13.75 2.00 1.25 1.00

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 Number Waveguide Size Frequency Range
(GHz)		 Air Flow
(CFM)		 PWR.Max
(Watts-CW):A		 PWR.Max
(Watts-CW):B		 Dimension:A Dimension:B Dimension:C
HPM180 WRD - 180C24 18.00 - 40.00 35 90 128 4.50 2.24 2.08
HPM110 WRD - 110C24 11.00 - 26.50 35 128 232 6.63 2.72 2.67
HPM750 WRD - 750D24 7.50 - 18.00 35 350 595 9.50 3.80 3.43
HPM650 WRD - 650D28 6.50 - 18.00 35 357 595 9.50 3.83 3.43
HPM580 WRD - 580D28 5.80 - 16.00 35 366 595 9.50 3.89 3.48
HPM475 WRD - 475D24 4.75 - 11.00 70 625 1062 12.25 4.65 4.08
HPM350 WRD - 350D24 3.50 - 8.20 70 789 1500 13.75 5.38 4.59
HPM250 WRD - 250D30 2.60 - 7.80 70 1000 1500 13.75 5.56 4.62
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