Microwave Sliding Short
Microwave sliding shorts are adjustable devices used in waveguide systems to fine-tune the impedance matching and phase adjustment. They facilitate precise control over the waveguide’s electrical length, optimizing signal reflection and transmission characteristics. Essential for calibration and testing, these tools are crucial for ensuring the peak performance of microwave transmission and communication systems.
Adjustable microwave sliding short for industrial waveguide systems at 915 MHz and 2450 MHz. Published product data covers WR340, WR430 and WR975, with 6 kW, 10 kW and up to 20 kW CW handling power. The movable short circuit provides more than half a guide wavelength of adjustment at the lowest operating frequency. Standard and customized Al/Cu configurations are available.
Set the Short Position to Match Your Waveguide Setup
The movable short circuit is adjustable for more than half a guide wavelength at the lowest operating frequency. Send the frequency, WR size, CW power, flange interface and available installation space. We check the configuration before quotation.
915 MHz / 2450 MHz
WR340 / WR430 / WR975
Up to 20 kW CW
Published Product Data
The product PDF lists the feature summary below. The model table is kept unchanged so you can compare the published rows directly.
Frequency range
915 MHz and 2450MHz
Waveguide size
WR340, WR430 and WR975
Handling power
6 KW, 10 KW, up to 20KW CW
Bandwidth
Full range
Material
Al/Cu
| Model | WR Type | Frequency (MHZ) | VSWR Max. | Coupling (dB) |
|---|---|---|---|---|
| DH-14WS… | WR650 | 1.13-1.73 | 50 | 90 |
| DH-22WS… | WR430 | 1.72-2.61 | 50 | 70 |
| DH-26WS… | WR340 | 2.17-3.30 | 50 | 60 |
| DH-32WS… | WR284 | 2.60-3.95 | 50 | 60 |
| DH-9WS… | WR975 | 0.76-1.15 | 50 | 110 |
Need a Fast Configuration Check?
Send frequency, WR size, CW power, flange code or drawing, and quantity. We check the fit before quotation.
Flange, Finish and Material
The published flange table is reproduced as listed in the product PDF. If your mating flange is different, send the interface drawing or flange designation with the RFQ.
| Flange Type | Inside Finish | Body Finish | Material |
|---|---|---|---|
| FDP | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al/Brass |
| FDP | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al/Brass |
| FDP | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al/Brass |
| FDP | Iridite per MIL-C-5541 | Anticorrosion Black Painted | Al/Brass |
Ordering Information
DH – 26 WSS 2450 P M A 6KW
DH
Dolph Microwave
26
Waveguide Type WR340
WSS
Sliding Short
2450
Freq. 2450 MHz
P
Flange Cover
M
Flange Grooved
A
Material Al
6KW
Handling Power 6KW CW
Choose the Component by What You Need It to Do
Use this sliding short when you need an adjustable short-circuit position in the waveguide.
For load impedance matching in a high-power industrial microwave line, use Microwave Tuners.
If you need to absorb reflected microwave power, use a Microwave Water Load.
For broader standard-waveguide sizes and general test work, compare the Waveguide Sliding Short range.
Have an Existing Part or Mating Flange Drawing?
Send the drawing, current part number or marked-up dimensions. We can review a standard model, replacement part or customized interface.
Send These Details With Your RFQ
Operating frequency or required band.
Waveguide type and mating flange designation or drawing.
Required CW power.
Material preference and available mechanical envelope.
Quantity and any PDF, STEP, sketch or existing part number.
Manufactured and Checked In-House
Manufacturing Capabilities
CNC and Waveguide Fabrication
Published capabilities include CNC machining, turning, forming, bending, plating, soldering and brazing.
Dimensional Verification
CMM equipment is part of the published manufacturing and inspection setup.
RF Test Support
Dolph states that every part is RF-tested before shipment, with in-house RF measurement capability published up to 100 GHz.
Useful References Before You Finalize the RFQ
Quality and Warranty

ISO 9001:2015
Dolph Microwave publishes ISO 9001:2015 certification for its quality system.

RoHS Process Capability
The manufacturing page lists anodising and passivation with RoHS capability.

One-Year Warranty
Defects in material and workmanship are covered for one year from the date of delivery under Dolph Microwave’s published warranty terms.
Ready to Price the Sliding Short?
Send the operating frequency, WR size, CW power, flange interface and quantity. Add a drawing if the unit must replace an existing part.
Technical Documents
Use the product PDF for the published sliding-short data and the flange document when checking the mating interface.
