Waveguide Termination
A waveguide termination absorbs incident RF power and limits reflections within its specified band. Dolph’s WL model matrix lists low-power loads by WR size, flange, VSWR and CW rating. Select a dedicated higher-power load when the required dissipation exceeds the chosen WL model; a matched load does not produce zero reflection.
Match the termination to the exact RF and mechanical conditions
A fixed waveguide termination provides a low-reflection end to a waveguide path by dissipating RF energy. Use the selected model row for frequency, WR size, VSWR, CW rating and flange. The WL matrix and the separate high-power load families have different ratings; their maximum frequency and power values cannot be combined.
The published model matrix below also lists 2 W millimeter-wave entries through WR10 / 112 GHz. Order by the exact model row, not by the overview figures alone.
Start with power and cooling, then confirm frequency and flange
0.32–112 GHz, WR2300–WR10. Model-specific VSWR is 1.03:1, 1.05:1 or 1.15:1. Use the full matrix below for the exact value.
Dedicated high-power range: 1.13–112 GHz, WR650–WR10, IP65, model-dependent VSWR 1.03:1–1.15:1.
View High Power TerminationDedicated water-cooled range for higher average power, with published VSWR up to 1.2:1 and models from WR975 down to WR28.
View Water-Cooled LoadsWe can check the model without a long specification exchange
Waveguide termination model matrix
Use the full model matrix below to compare every published parameter. On mobile, swipe horizontally to review every field.
| MODEL | FREQ. RANGE (GHz) | WG SIZE | VSWR | AVG POWER CW (W) | FLANGES TYPE | LENGTH (mm) | INGRESS PROTECTION | MATERIAL | FINISH | DATASHEET | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| COVER | GROOVED | ||||||||||
| DH-3WL… | 0.32-0.49 | WR2300 | 1.05:1 | 5 | UDR3 | PDR3 | 2005 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-4WL… | 0.35-0.53 | WR2100 | 1.05:1 | 5 | UDR4 | PDR4 | 1900 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-5WL… | 0.41-0.62 | WR1800 | 1.05:1 | 5 | UDR5 | PDR5 | 1600 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-6WL… | 0.49-0.75 | WR1500 | 1.05:1 | 5 | UDR6 | PDR6 | 1300 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-8WL… | 0.64-0.98 | WR1150 | 1.05:1 | 5 | UDR8 | PDR8 | 1100 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-9WL… | 0.76-1.15 | WR975 | 1.05:1 | 5 | UDR9 | PDR9 | 660 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-12WL… | 0.96-1.46 | WR770 | 1.05:1 | 5 | UDR12 | PDR12 | 680 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-14WL… | 1.13-1.73 | WR650 | 1.03:1 | 5 | UDR14 | PDR14 | 570 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-18WL… | 1.45-2.2 | WR510 | 1.03:1 | 5 | UDR18 | PDR18 | 550 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-22WL… | 1.72-2.61 | WR430 | 1.03:1 | 5 | UDR22 | PDR22 | 470 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-26WL… | 2.17-3.3 | WR340 | 1.03:1 | 5 | UDR26 | PDR26 | 350 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-32WL… | 2.6-3.95 | WR284 | 1.03:1 | 5 | UDR32 | PDR32 | 278 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-40WL… | 3.22-4.9 | WR229 | 1.03:1 | 5 | UDR40 | PDR40 | 275 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-48WL… | 3.94-5.99 | WR187 | 1.03:1 | 5 | UDR48 | PDR348 | 170 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-58WL… | 4.64-7.05 | WR159 | 1.03:1 | 5 | UDR58 | PDR58 | 135 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-70WL… | 5.38-8.17 | WR137 | 1.03:1 | 5 | UDR70 | PDR70 | 180 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-84WL… | 6.57-9.99 | WR112 | 1.03:1 | 5 | UDR84/UBR84 | PDR84/PBR84 | 150 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-100WL… | 8.2-12.5 | WR90 | 1.03:1 | 5 | UDR100/UBR100 | PDR100/PBR100 | 130 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-120WL… | 9.84-15 | WR75 | 1.03:1 | 5 | UBR120 | PBR120 | 110 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-140WL… | 11.9-18 | WR62 | 1.03:1 | 5 | UBR140 | PBR140 | 90 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-180WL… | 14.5-22 | WR51 | 1.03:1 | 5 | UBR180 | PBR180 | 75 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-220WL… | 17.6-26.7 | WR42 | 1.03:1 | 5 | UBR220 | PBR220 | 85 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-260WL… | 21.7-33 | WR34 | 1.03:1 | 5 | UBR260 | PBR260 | 55 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-320WL… | 26.3-40 | WR28 | 1.03:1 | 5 | UBR320 | PBR320 | 40 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP |
| DH-400WL… | 32.9-50.1 | WR22 | 1.15:1 | 2 | FUGP400/UG-383U/M | 40 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP | |
| DH-500WL… | 39.2-59.6 | WR19 | 1.15:1 | 2 | FUGP500/UG-383U/M | 40 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP | |
| DH-620WL… | 49.8-75.8 | WR15 | 1.15:1 | 2 | FUGP620/UG-385U/M | 40 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP | |
| DH-740WL… | 60.5-91.9 | WR12 | 1.15:1 | 2 | FUGP740/UG-387U/M | 30 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP | |
| DH-900WL… | 73.8-112 | WR10 | 1.15:1 | 2 | FUGP900/UG-387U/M | 30 | IP65 | Al/Cu | Chromate/Painted | PDF/STEP | |
The online model matrix and the downloadable PDF currently show different low-power CW values on some WL models. Confirm the final model datasheet or quotation before order.
Published finish: Chromate/Painted. The product note states corrosion protection treatment and flat-black paint, with polished, unplated Surtec flanges; other finishes and paint colors are available on request.
IP65 is listed in the online matrix. Confirm the selected assembly, mating flange and sealing arrangement with Dolph if ingress protection is an acceptance requirement; the table does not establish an RF power rating for every installation condition.
Check the product PDF and flange reference before ordering
Decode the required construction before the quotation
The component can be reviewed with the RF and mechanical interface together
Published application areas
Check the interface before the load is released for production
Use the product that matches how the RF load will be used
Send frequency, WR size, power and flange — we will check the load family first
Request current availability and delivery against the exact part number, quantity and required documentation. A general stock or delivery statement is not a commitment for the selected load.
