Manual 3-Stub Matching for High-Power Microwave Lines
Dolph Microwave builds waveguide tuners for load impedance matching in 915 MHz and 2450 MHz industrial microwave systems. Choose a catalog model or send your waveguide, power, flange and installation details for a matched configuration.
Built to Match the Load in a High-Power Waveguide Line
The three manual stubs are adjusted to change the impedance seen by the microwave source and reduce VSWR at the load. This product is a mechanical waveguide matching component for industrial microwave power systems.
For replacement work, send the existing waveguide size, flange type, operating frequency, CW power and an installation drawing or clear interface photo. If your requirement is an adjustable short-circuit section instead, use a microwave sliding short.
See the 915 / 2450 MHz Component LineCatalog Product Specifications
These product details are kept in the same wording used in the original tuner specification.
The feature list names WR340, WR430 and WR975. The original model table also includes WR284. Send your actual mating waveguide and flange details so the quoted unit matches the interface.
Standard Model Matrix
Match frequency, waveguide, power and cooling against the original catalog rows. Final model suffix and flange details are confirmed with the order.
| Model | WR Type | Frequency (MHZ) | VSWR Max. | Handling Power (KW) | Cooling | Tuning | Flange Type | Inside Finish | Body Finish | Material |
|---|---|---|---|---|---|---|---|---|---|---|
| DH-9W3ST915PPA… | WR975 | 915±30 | 1.1-10.0 | 15 | Air | Manual | Cover/Grooved | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al |
| DH-26W3ST2450PPA… | WR340 | 2450±25 | 1.1-10.0 | 6 | Air | Manual | Cover/Grooved | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al |
| DH-26WW3ST2450PPA… | WR340 | 2450±25 | 1.1-10.0 | 10 | Water | Manual | Cover/Grooved | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al |
| DH-32W3ST2450PPA… | WR284 | 2450±25 | 1.1-10.0 | 6 | Air | Manual | Cover/Grooved | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al |
Already have a model number or an old tuner drawing? Send it with the operating power and mating flange information for a faster cross-check.
Confirm a Tuner ModelOrdering Information
Catalog code example: DH – 26 W3ST 2450 P M A
Send These Details for a Quote
A complete RFQ lets us check the standard model first and identify where a custom mechanical configuration is needed.
Operating Frequency
Center frequency and tolerance. Catalog rows cover 915±30 MHz and 2450±25 MHz.
CW Power
State the continuous operating power and duty condition used by the line.
Waveguide Size
Send the WR type, or the mating waveguide dimensions when replacing a non-standard part.
Flange Interface
Confirm cover or grooved flange and include the mating designation if known.
Cooling
Catalog configurations include air cooling and water cooling. Use the quoted cooling version for the selected power configuration.
Installation Drawing
Include available length, adjacent components and interface dimensions when the tuner must fit an existing line.
Manufacturing and Inspection Support
Dolph Microwave states that it has manufactured microwave components since 2001. Its published capabilities include CNC machining, turning, waveguide forming and bending, soldering and brazing, plating, anodising and passivation, laboratory work and microwave-chamber testing.
CNC Workshop
Testing Laboratory
Dimensional Inspection
Microwave Chamber
Complete the Microwave Line with the Right Components
Use the tuner for impedance matching. Add other components only when the system function requires them.
For reflected-power protection around the source, review the microwave isolator or microwave circulator.
For power sampling or measurement, use a microwave coupler. For absorbing microwave power during system operation or testing, review the microwave water load.
If several high-power parts must be matched to the same line, see our custom industrial microwave components capability.
Need a Standard Model or a Custom Fit?
Send the operating frequency, CW power, waveguide size, flange type and installation drawing. We can check the catalog configuration first and quote a customized mechanical version when the interface requires it.
Technical Files
Use the original tuner datasheet for model reference and the flange document when checking the mating interface.
