WR340 Pressure Window
2450 ± 25 MHz30 psig10 kW
Built for a 2450 MHz high-power line that runs under pressure.
A high-power microwave tuner from our industrial line
Dolph Microwave · Since 2001
Custom Industrial Microwave Components Manufacturer
We build high-power waveguide components for 915 MHz and 2450 MHz industrial systems — tuners, circulators, isolators, water loads, bends and pressure windows, handling 6 kW to 20 kW CW. Standard or fully custom, all made in our own factory.
ISO 9001:2015 certified factoryRoHS compliant1-year warranty
Founded in 2001Grown out of the state-owned 806 Factory
ISO 9001:2015Written quality manual for every job
RoHS CompliantSurface treatment done to RoHS rules
1-Year WarrantyFree repair or replacement for defects
20+
Years building microwave parts
20kW CW
Component power handling
150kW
Water-cooled loads, average power
100GHz
Measurement systems in our lab
Our Components
High-Power Parts for 915 MHz and 2450 MHz Systems
Every part below is machined, brazed and tested in our own workshop. Send us your drawing, or pick a standard model and we adapt it to your system.
Microwave Tuners
Match the load impedance and pull VSWR down in high-power systems.
915 / 2450 MHz6–20 kW CWWR340 / WR430 / WR975
Microwave Circulators
Route the signal one way and keep reflected power away from your source.
915 / 2450 MHzUp to 20 kW CWHigh Isolation
Microwave Isolators
Let power through one way, absorb what comes back. Protects the magnetron.
6 / 10 / 20 kW CWWater or Air CooledCover / Grooved Flange
Microwave Water Loads
Absorb excess microwave energy safely — for testing and power measurement.
High PowerHeat-ResistantTest & Calibration
Microwave Bends
E-bends and H-bends, sweep or miter type, to route power around your layout.
45° / 60° / 90°6–20 kW CWAl / Cu
Waveguide Pressure Windows
Seal the waveguide against pressure and dust, let the microwave pass.
WR-2300 ~ WR-10VSWR ≤ 1.2:1Seals up to 70 psi
Mode Converter Antennas
Change the microwave from one transmission mode to another, with low loss.
Standard & CustomLow LossCompact
Microwave Couplers
Sample or split the signal so you can measure power without stopping the line.
High DirectivityHigh Temp ResistantCustom Coupling
Waveguide Sliding Shorts
A movable short for fine-tuning phase and impedance in test setups.
WR-2300 ~ WR-10Al / CuCover / Grooved / Choke
Need something not listed here?Microwave Customized ProductsCustom Waveguide Systems
How the Parts Work Together
What Each Part Does in Your Line
A high-power microwave line is a chain. Each part has one job — here is the chain from the source to the load, in plain words.
Source
Magnetron
Makes the microwave power.
Protect
Isolator / Circulator
Stops reflected power from going back into the source.
Tune
Tuner / Sliding Short
Matches the line, so more power reaches your product.
Measure
Coupler / Water Load
Lets you check power without stopping the line.
Route
Bends / Transitions / Windows
Carries the power to the chamber where the work happens.
Absorb
Termination / Load
Safely eats any leftover power.
915 or 2450 MHz
What’s the Difference?
Almost every industrial microwave system runs on one of these two frequencies. We build hardware for both.
915 MHz
Big lines, deep heating
The longer wavelength goes deeper into the material, so 915 MHz is the usual choice for large continuous heating and drying lines. The waveguide is physically bigger — this is where sizes like WR975 come in.
Continuous drying linesLarge-scale heatingWR975 / WR430 hardware
2450 MHz
Compact systems, batch work
The same frequency as the microwave oven in your kitchen. Hardware is more compact — sizes like WR340 — and it is the common choice for batch systems, oven-style chambers and smaller industrial setups.
Batch heating systemsOven-style chambersWR340 hardware
Built for High Power
What 20 kW CW Asks From a Component
At this power level, heat and arcing decide whether a part lasts weeks or years. That is why we offer cooling options, the right flange for your line, and materials that hold up — and why every high-power part is tested before it ships.
Conductive OxidationAnticorrosion Black PaintChromate ConversionAnodising (RoHS)
Water or Air CoolingChoose the cooling that matches your power and duty cycle.
Cover, Grooved & Choke FlangesThe flange types used on real high-power lines.
Aluminium & Copper BuildsOxygen-free copper where loss matters most.
Tested Before ShippingChecked in our testing lab, not just measured on paper.
Quick Reference
Standard Numbers at a Glance
The usual ranges buyers ask about. Need something outside these numbers? Ask — custom is most of our work.
| Component | Frequency | Power | Waveguide | Notes |
|---|---|---|---|---|
| Tuners | 915 / 2450 MHz | 6–20 kW CW | WR340 / WR430 / WR975 | Load impedance matching |
| Circulators | 915 / 2450 MHz | Up to 20 kW CW | WR340 / WR430 / WR975 | Cover & grooved flanges |
| Isolators | 915 / 2450 MHz | 6 / 10 / 20 kW CW | WR340 / WR430 / WR975 | Water or air cooled |
| Bends | 915 / 2450 MHz | 6–20 kW CW | — | E / H, 45° / 60° / 90° |
| Pressure windows | 0.32 – 112 GHz | — | WR-2300 ~ WR-10 | Seals up to 70 psi |
| Sliding shorts | — | — | WR-2300 ~ WR-10 | Cover / grooved / choke |
| Terminations | Models 1.1 – 50 GHz | 100 – 6000 W CW | WR2300 ~ WR10 | Air or water cooled |
| Water-cooled loads | By band | Up to 150 kW | WR975 ~ WR28 | MIL-D-3954, VSWR ≤ 1.2:1 |
Recent Builds
Parts We Recently Built and Shipped
These are parts we actually built for customers. The numbers come from our own delivery notes.
S-Band Magnetron Transition, WR284
2.85 – 3.005 GHzIL < 0.05 dBUp to 5 MW
A TE10-to-TE11 rectangular-to-circular adapter for a high-power magnetron source.
Finned High-Power Termination
750 W CW7.5 kW PeakVSWR 1.1:1 Max
Cast with cooling fins and heat-resistant absorber, for a 5–6 GHz line.
Applications
Where These Components Work
Our parts run in systems like these every day.
Food Processing
Heating, drying and cooking lines in commercial food production.
Power Measurement & Testing
Water loads and tuners for measuring microwave power and heating efficiency.
Scientific Research
Sliding shorts, tuners and couplers for lab setups and calibration work.
Medical & Radar Equipment
Circulators and isolators that keep microwave energy flowing one way.
How Ordering Works
From Your Email to a Tested Component
No long procedures. Four steps, and you always know which step your order is in.
01
Step 01Tell Us What You Need
Frequency, power, waveguide size, flange. A drawing helps, but is not required.
02
Step 02We Design and Quote
You get a technical proposal and a price from our engineers.
03
Step 03We Build It
Machining, brazing and surface treatment in our own workshop.
04
Step 04We Test and Ship
Checked in our lab, packed for export, sent to your door.
Factory & Testing
Machined, Brazed and Tested Under One Roof
We don’t send critical steps outside. Milling, turning, bending, brazing and assembly all happen in our own workshop, so we control the quality at every step.
CNC MachiningLathes & TurningWaveguide Forming & BendingAnodising & Passivation (RoHS)Abrasive MachiningDiamond GrindingElectrolytic & Electroless PlatingSoldering & Brazing (Cu / Al)Electroforming
“If it is made of metal, we can make it.”— how our workshop team describes their job
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Copper, copper alloys and aluminium
We solder and braze all the common waveguide materials in-house.
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Tested before it leaves
Every component is checked in our testing lab before packing.
Measurement & Testing
How We Check Your Parts Before Shipping
A spec sheet is easy to print. We back ours with real measurement equipment and test services in-house.
RF Measurement up to 100 GHz
Vector and scalar measurement systems covering the bands we build for.
Antenna Anechoic Chambers
Quiet rooms for antenna and radiation tests without outside noise.
High Power Transmitters
So high-power parts can be checked at real working levels.
Waveguide Calibration
Calibration service for waveguide measurement setups.
EMI & EMS Testing
Check how equipment behaves with electromagnetic interference.
Environmental Testing
Temperature, altitude, salt fog and humidity — for parts that work outdoors.
Related Products
More High-Power Parts From the Same Factory
If your system needs more than the parts above, these product lines come from the same workshop and the same quality checks.
High Power Water-Cooled Loads
Up to 150 kW average power. Refractory ceramic absorber, welded aluminium housing, built to MIL-D-3954, VSWR ≤ 1.2:1.
High Power Terminations
100 W to 6000 W CW, air or water cooled, in waveguide sizes from WR2300 down to WR10.
Waveguide Switches, Motorized & Manual
Change the signal path in your line. DH series covers 2.6 to 110 GHz, in rectangular and double-ridge waveguide.
Microwave Customized Products
Anything outside the catalog — send a drawing or a requirements list and we build it.
One-Year Warranty
If a part is defective, we replace it. Repairs from normal use are free within one year of delivery.
Worldwide Delivery
Our sales team handles international shipping and customs paperwork every week — your order arrives without surprises.
Direct Engineer Replies
You talk to people who design and build the parts — not a call center. Technical questions get technical answers.
Downloads
Brochures and Certificates
Save these for your supplier file. The ISO certificate is the same one we show in audits.
Dolph Microwave Product Brochure
ISO 9001:2015 Certificate
Connectors & Cable Assemblies Brochure
Terms & Conditions
Technical Articles
Read More About Waveguide & High Power
Short, practical articles from our team. Useful background before you specify a high-power part.
01
WR340 Pressure Window: 2450±25 MHz, 30 psig, 10 kW
A high-power pressure window we built and shipped.
02
6 Specific Aspects of Arcing in Waveguides
Why arcing happens in high-power lines, and what to do about it.
03
4.64–7.05 GHz High Power Termination, 750 W
Specs of a finned termination from our high-power line.
04
6 Meanings of TE and TM in Rectangular Waveguide
Waveguide modes explained in plain terms.
05
How to Design Waveguide Transitions Efficiently
Practical notes on moving between waveguide sizes.
06
WR28 Waveguide Electronic Switch, 26.3–40 GHz
Full test data from a switch we delivered: 65 dB isolation, 120 ms.
Keep reading:Cutoff Frequency, in 4 StepsCan You Clean a Waveguide?Waveguide vs Transmission LineThe 3 Waveguide ModesAll Articles
About Dolph
Why Customers Choose Dolph
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We have done this since 2001
Dolph grew out of the state-owned 806 Factory. Waveguide work is not new to us — it is what the company was built on. About our company.
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Quality is written down, not promised
Our Quality Manual and Quality Procedure follow ISO 9001:2015. Every job goes through the same checks.
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You talk to the people who build your parts
Technical questions go straight to our engineers — not a call center.
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A real warranty
One year from delivery. Defective parts are replaced, and normal-use repairs are free.
Quality inspection in our Xi’an factory
FAQ
Questions Buyers Ask Us
What industrial microwave components can you build?
Microwave tuners, circulators, isolators, water loads, bends, couplers, mode converter antennas, pressure windows, sliding shorts and transitions — mainly for 915 MHz and 2450 MHz systems, handling 6 kW to 20 kW CW.
Which waveguide sizes and power levels are available?
The high-power industrial line covers WR340, WR430 and WR975 at 6 kW, 10 kW and up to 20 kW CW. Pressure windows and sliding shorts cover the full range from WR-2300 down to WR-10.
How much power can your loads and terminations handle?
High power terminations handle 100 W to 6000 W CW with air or water cooling. Water-cooled waveguide loads go up to 150 kW average power, built with refractory ceramic absorbers to MIL-D-3954.
How are the parts tested before shipping?
We run RF vector and scalar measurement systems up to 100 GHz, antenna anechoic chambers, high power transmitters, waveguide calibration, EMI and EMS testing, plus environmental tests like temperature, altitude, salt fog and humidity.
Can you build components to our own drawing?
Yes — that is most of our work. Machining, bending, brazing, plating and testing are all done in-house, so custom dimensions are not a problem.
What quality standards do you follow?
The factory works to a written Quality Manual and Quality Procedure based on ISO 9001:2015. Products meet RoHS requirements, and every product has a one-year warranty.
How do I get a quote?
Email your frequency, power level, waveguide size and flange type to sales@dolphmicrowave.com, or call +86 29 8881 0979. You will get a technical proposal and a price.
What to Send Us
Send These 6 Details for a Fast Quote
The more of these you include in your first email, the faster our engineers can answer. Don’t have all of them? Send what you have — we will ask about the rest.
1
Frequency
915 MHz, 2450 MHz, or another band you work in.
2
Power level
Continuous power in kW, and any peak power.
3
Waveguide size
For example WR340, WR430 or WR975.
4
Flange and cooling
Cover, grooved or choke flange; water or air cooling.
5
Space limits
Any size or shape limits on your line, or a drawing.
6
Quantity and timing
How many pieces, and when you need them.
Contact
Get Your Component Quote
Send your frequency, power and waveguide size. Our engineers will reply with a technical proposal and a price — usually the same week.
Dolph Microwave · FengHuiNan Road NO.34, High-Tech Zone, Xi’an, China · sales@dolphmicrowave.com
