Rectangular Waveguide Terminations

Frontgrade offers a wide range of precision rectangular 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 Rectangular Waveguide 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).

Low Power Terminations

Frontgrade's Low Power Terminations use custom machined load elements for optimum electrical performance. This series of terminations is designed for low power inputs. VSWR is less than 1.05 maximum over the full waveguide bandwidth.

Model Number Waveguide Size Frequency Range
(GHz)		 Power
(Watts)		 Dimension A
LPT22 WR - 22 33.00 - 50.00 2 2.00
LPT28 WR - 28 26.50 - 40.00 2 2.00
LPT34 WR - 34 22.00 - 33.00 2 3.00
LPT42 WR - 42 18.00 - 26.50 2 3.00
LPT51 WR - 51 15.00 - 22.00 2 3.00
LPT62 WR - 62 12.40 - 18.00 2 4.00
LPT75 WR - 75 10.00 - 15.00 2 4.00
LPT90 WR - 90 8.20 - 12.40 2 6.00
LPT102 WR - 102 7.00 - 11.00 2 6.00
LPT112 WR - 112 7.05 - 10.00 2 6.00
LPT137 WR - 137 5.85 - 8.20 3 6.50
LPT159 WR - 159 4.90 - 7.05 4 7.50
LPT187 WR - 187 3.95 - 5.85 5 8.50
LPT229 WR - 229 3.30 - 4.90 5 10.00
LPT284 WR - 284 2.60 - 3.95 5 10.50
LPT284 R/H WR - 284 R/H 2.60 - 3.95 5 10.50
LPT340 WR - 340 2.20 - 3.30 5 12.00
LPT430 WR - 430 1.70 - 2.60 5 16.00

Low Power Precision Terminations

Frontgrade's Low Power Precision Terminations are constructed using custom machined load elements for optimum electrical performance. VSWR is less than 1.02 maximum over the full waveguide bandwidth.

Model Number Waveguide Size Frequency Range
(GHz)		 Power
(Watts)		 Dimension A
PLPT22 WR - 22 33.00 - 50.00 2 4.00
PLPT28 WR - 28 26.50 - 40.00 2 6.00
PLPT34 WR - 34 22.00 - 33.00 2 6.00
PLPT42 WR - 42 18.00 - 26.50 2 6.00
PLPT51 WR - 51 15.00 - 22.00 2 6.00
PLPT62 WR - 62 12.40 - 18.00 2 8.00
PLPT75 WR - 75 10.00 - 15.00 2 8.00
PLPT90 WR - 90 8.20 - 12.40 2 10.00
PLPT102 WR - 102 7.00 - 11.00 2 10.00
PLPT112 WR - 112 7.05 - 10.00 2 10.00
PLPT137 WR - 137 5.85 - 8.20 3 12.00
PLPT159 WR - 159 4.90 - 7.05 4 12.00
PLPT187 WR - 187 3.95 - 5.85 5 12.00
PLPT229 WR - 229 3.30 - 4.90 5 14.00
PLPT284 WR - 284 2.60 - 3.95 5 18.00
PLPT284 R/H WR - 284 R/H 2.60 - 3.95 5 18.00
PLPT340 WR - 340 2.20 - 3.30 5 18.00
PLPT430 WR - 430 1.70 - 2.60 5 18.00

Low Power Short Length Terminations

Frontgrade's standard product line of short-length low power terminations are constructed using custom machined load elements for optimum electrical performance. VSWR is less than 1.10 maximum over the full waveguide bandwidth.

Model Number Waveguide Size Frequency Range
(GHz)		 Power
(Watts)		 Dimension A
LPTSL22 WR - 22 33.00 - 50.00 2 1.00
LPTSL28 WR - 28 26.50 - 40.00 2 1.00
LPTSL34 WR - 34 22.00 - 33.00 2 1.00
LPTSL42 WR - 42 18.00 - 26.50 2 1.50
LPTSL51 WR - 51 15.00 - 22.00 2 1.50
LPTSL62 WR - 62 12.40 - 18.00 2 2.00
LPTSL75 WR - 75 10.00 - 15.00 2 2.00
LPTSL90 WR - 90 8.20 - 12.40 2 3.00
LPTSL102 WR - 102 7.00 - 11.00 2 3.00
LPTSL112 WR - 112 7.05 - 10.00 2 3.00
LPTSL137 WR - 137 5.85 - 8.20 3 3.50
LPTSL159 WR - 159 4.90 - 7.05 4 3.50
LPTSL187 WR - 187 3.95 - 5.85 5 4.00
LPTSL229 WR - 229 3.30 - 4.90 5 5.00
LPTSL284 WR - 284 2.60 - 3.95 5 6.00
LPTSL284 R/H WR - 284 R/H 2.60 - 3.95 5 6.00
LPTSL340 WR - 340 2.20 - 3.30 5 10.00
LPTSL430 WR - 430 1.70 - 2.60 5 12.00

Low-Medium Power Terminations

Frontgrade's Low-Medium Power Terminations use custom machined load elements for optimum electrical performance. VSWR is less than 1.15 maximum over the full waveguide bandwidth.

Model Number Waveguide Size Frequency Range
(GHz)		 PWR.Max
(Watts-CW):A		 PWR.Max(
Watts-CW):B		 Air Flow
(CFM)		 Dimension A
LMPT22 WR - 22 33.00 - 50.00 13 25 35 3.77
LMPT28 WR - 28 26.50 - 40.00 15 27 35 3.77
LMPT34 WR - 34 22.00 - 33.00 17 33 35 3.77
LMPT42 WR - 42 18.00 - 26.50 24 45 35 3.77
LMPT51 WR - 51 15.00 - 22.00 35 66 35 4.56
LMPT62 WR - 62 12.40 - 18.00 50 94 35 5.23
LMPT75 WR - 75 10.00 - 15.00 71 156 35 6.00
LMPT90 WR - 90 8.20 - 12.40 100 200 35 6.90
LMPT102 WR - 102 7.00 - 11.00 128 259 70 7.68
LMPT112 WR - 112 7.05 - 10.00 143 294 70 8.17
LMPT137 WR - 137 5.85 - 8.20 259 455 70 9.73
LMPT159 WR - 159 4.90 - 7.05 294 556 70 11.29
LMPT187 WR - 187 3.95 - 5.85 405 750 70 12.98
LMPT229 WR - 229 3.30 - 4.90 484 938 120 12.98
LMPT284 WR - 284 2.60 - 3.95 714 1364 120 12.98
LMPT284 R/H WR - 284 R/H 2.60 - 3.95 556 1071 120 12.98
LMPT340 WR - 340 2.20 - 3.30 789 1500 120 16.34
LMPT430 WR - 430 1.70 - 2.60 938 1875 120 18.92

Medium Power Terminations

Frontgrade's Medium Power Terminations are constructed of heavy wall 6061 aluminum waveguide and extruded heat sink material. The load elements are custom ground silicon carbide spears tapered for optimum VSWR response (1.15 maximum) 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
MPT22 WR - 22 33.00 - 50.00 18 25 35 3.77 0.85 1.21
MPT28 WR - 28 26.50 - 40.00 21 29 35 3.77 0.85 1.24
MPT34 WR - 34 22.00 - 33.00 30 41 35 3.77 0.85 1.27
MPT42 WR - 42 18.00 - 26.50 38 53 35 3.77 1.11 1.32
MPT51 WR - 51 15.00 - 22.00 66 92 35 4.56 1.11 2.29
MPT62 WR - 62 12.40 - 18.00 96 134 35 5.23 1.28 2.35
MPT75 WR - 75 10.00 - 15.00 174 273 35 6.00 1.52 2.82
MPT90 WR - 90 8.20 - 12.40 250 350 35 6.90 1.87 2.6
MPT102 WR - 102 7.00 - 11.00 326 455 70 7.68 1.87 2.95
MPT112 WR - 112 7.05 - 10.00 366 517 70 8.17 1.87 2.94
MPT137 WR - 137 5.85 - 8.20 577 750 70 9.73 2.28 3.99
MPT159 WR - 159 4.90 - 7.05 714 1000 70 11.29 2.28 4.12
MPT187 WR - 187 3.95 - 5.85 833 1154 70 12.98 3.11 4.54
MPT229 WR - 229 3.30 - 4.90 1071 1500 120 12.98 3.67 5.42
MPT284 WR - 284 2.60 - 3.95 1364 1875 120 12.98 4.57 5.85
MPT284 R/H WR - 284 R/H 2.60 - 3.95 1250 1668 120 12.98 4.57 5.18
MPT340 WR - 340 2.20 - 3.30 1500 2143 120 16.34 5.89 6.54
MPT430 WR - 430 1.70 - 2.60 1668 2500 120 18.92 6.67 7.34

High Power Terminations

Frontgrade's High Power Terminations are constructed of heavy wall aluminum waveguide and extruded heat sink material. The load elements are custom ground silicon carbide spears 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)		 A B C
HPT22 WR - 22 33.00 - 50.00 43 68 35 3.77 2.27 2.16
HPT28 WR - 28 26.50 - 40.00 54 68 35 3.77 2.25 2.05
HPT34 WR - 34 22.00 - 33.00 72 103 35 3.77 2.31 2.08
HPT42 WR - 42 18.00 - 26.50 86 118 35 3.77 2.82 2.57
HPT51 WR - 51 15.00 - 22.00 143 205 35 4.56 2.91 2.66
HPT62 WR - 62 12.40 - 18.00 183 263 35 5.23 3.02 2.71
HPT75 WR - 75 10.00 - 15.00 221 395 35 6.00 3.99 3.68
HPT90 WR - 90 8.20 - 12.40 300 500 35 6.90 4.02 3.7
HPT102 WR - 102 7.00 - 11.00 395 652 70 7.68 4.26 3.75
HPT112 WR - 112 7.05 - 10.00 429 750 70 8.17 4.36 3.74
HPT137 WR - 137 5.85 - 8.20 682 1071 70 9.73 5.16 4.41
HPT159 WR - 159 4.90 - 7.05 882 1500 70 11.29 5.38 4.58
HPT187 WR - 187 3.95 - 5.85 1000 1682 70 12.98 6.11 5.1
HPT229 WR - 229 3.30 - 4.90 1250 2055 120 12.98 6.9 5.75
HPT284 WR - 284 2.60 - 3.95 1613 2381 120 12.98 7.69 6.09
HPT340 WR - 340 2.20 - 3.30 1786 2679 120 16.34 8.58 6.88
HPT430 WR - 430 1.70 - 2.60 1974 3061 120 18.92 9.83 7.68

High Power Air Cooled Terminations

Frontgrade's High Power Air Cooled Terminations are constructed of aluminum bodies and flanges. The load elements are custom ground silicon carbide spears 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
HPTAC28 WR - 28 26.50 - 40.00 35 80 6.77 3.14 3.14
HPTAC34 WR - 34 22.00 - 33.00 35 118 6.77 3.14 3.14
HPTAC42 WR - 42 18.00 - 26.50 35 130 6.77 3.14 3.14
HPTAC51 WR - 51 15.00 - 22.00 35 225 7.56 3.14 3.14
HPTAC62 WR - 62 12.40 - 18.00 35 290 8.23 3.14 3.14
HPTAC75 WR - 75 10.00 - 15.00 35 450 9 3.99 3.68
HPTAC90 WR - 90 8.20 - 12.40 35 600 9.9 4.02 3.7
HPTAC102 WR - 102 7.00 - 11.00 70 715 11.28 4.69 4.69
HPTAC112 WR - 112 7.05 - 10.00 70 825 11.77 4.69 4.69
HPTAC137 WR - 137 5.85 - 8.20 70 1180 13.33 5.16 4.69
HPTAC159 WR - 159 4.90 - 7.05 70 1650 14.89 5.38 4.69
HPTAC187 WR - 187 3.95 - 5.85 70 1850 16.58 6.11 5.1
HPTAC229 WR - 229 3.30 - 4.90 120 2260 16.58 6.90 5.75
HPTAC284 WR - 284 2.60 - 3.95 120 2620 16.58 7.69 6.09
HPTAC340 WR - 340 2.20 - 3.30 120 2950 8.58 6.88
HPTAC430 WR - 430 1.70 - 2.60 120 3350 9.83 7.68

High Power Water Cooled Terminations

Frontgrade's High Power Water Cooled Terminations feature aluminum bodies and flanges. The load elements are custom ground silicon carbide spears shaped for optimum power handling and heat transfer while maintaining 1.15 maximum VSWR. These terminations include 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
HPTW22 WR - 22 33.00 - 50.00 248 3.77 1.40 1.00 0.50
HPTW28 WR - 28 26.50 - 40.00 263 3.77 1.40 1.00 0.50
HPTW34 WR - 34 22.00 - 33.00 303 3.77 1.40 1.00 0.50
HPTW42 WR - 42 18.00 - 26.50 329 3.77 1.40 1.00 0.50
HPTW51 WR - 51 15.00 - 22.00 568 4.56 1.75 1.25 0.50
HPTW62 WR - 62 12.40 - 18.00 694 5.23 1.75 1.25 0.50
HPTW75 WR - 75 10.00 - 15.00 877 6.00 1.75 1.25 0.50
HPTW90 WR - 90 8.20 - 12.40 1000 6.90 1.75 1.25 1.00
HPTW102 WR - 102 7.00 - 11.00 1136 7.68 1.75 1.25 1.00
HPTW112 WR - 112 7.05 - 10.00 1250 8.17 1.75 1.25 1.00
HPTW137 WR - 137 5.85 - 8.20 2083 9.73 2.00 1.25 1.00
HPTW159 WR - 159 4.90 - 7.05 3333 11.29 2.50 1.50 1.00
HPTW187 WR - 187 3.95 - 5.85 4167 12.98 2.50 1.50 1.00
HPTW229 WR - 229 3.30 - 4.90 5000 12.98 3.25 1.50 1.00
HPTW284 WR - 284 2.60 - 3.95 5000 12.98 3.25 1.50 1.00
HPTW340 WR - 340 2.20 - 3.30 7500 16.34 4.25 1.75 1.00
HPTW430 WR - 430 1.70 - 2.60 8000 18.92 5.25 1.75 1.00
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