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WR975 Waveguide UHF Band, 75 kW Circulators

Ferrite Microwave Technologies is the leading global manufacturer of WR975 Waveguide UHF Band, 75 kW circulators for industrial applications. FMT supplies advanced circulators to the world’s leading generator companies and microwave industry OEMs. We are supported by our partners at Mega Industries (A Microwave Techniques Company) and their compatible product line, making us the largest global producer of high-power WR975 waveguide components.

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Browse 100kW Circulators

Check out our standard line of WR975 circulators, components, and capabilities on the Microwave Techniques website.


WR975 Waveguide Circulator, 915 MHz, 75 kW, UHF Band

Ferrite Microwave Technologies WR975 Waveguide UHF Band Circulator operates at 915 MHz, with input power at 75 kW CW. Our circulators feature one hundred percent copper domes for superior thermal management, leading to lower insertion loss. This passive device includes ports for couplers and/or arc detectors. FMT circulators are the de facto standard for the industrial microwave generator industry. In fact, we install them in our own microwave generators.

WR975 Circulator for Microwave Generator

FMT Circulators: Applications

Ferrite’s circulators are employed in various applications. Regardless of the application, we place the same level of intricate detail into our high-power microwave components, whether medical, scientific, radar, or industrial. We take a range of application and setting factors into account, from environmental specifications, to power level and operating frequency, to system interface, and beyond. FMT considers each of these factors as critical when designing circulators.

915 MHz Circulator 75 kW

Our WR975 Waveguide UHF Band Circulators at 75 kW are installed in our very own GET2024 915 MHz microwave generators, which are employed in several different industrial processing applications, including:

WR975 Waveguide RF Circulator
  • Food Processing
  • Microwave Pyrolysis
  • CVD Diamond Growth
  • Energy (Oil Reclamation & Coal Treatment)
  • Government Municipalities (waste and sludge treatment)
  • Building & Materials Handling (lumber, foam, and textiles treatment)

WR975 / UHF Band / 75 kW Circulator: Specifications

While FMT offers a product portfolio with thousands of devices available, we would like to highlight one of our most popular products, the UFC3-557-02 circulator. This high-power circulator is found in countless generators across the globe, including our own. It is widely recognized for its unmatched capabilities in microwave power isolation.

The following specifications apply to Ferrite Microwave Technologies WR975 circulator model UFC3-557-02:

Frequency Band:UHF Band
Operating Frequency:915 +/- 5 MHz | +/- 10 MHz
Input Power:75 kW CW
VSWR:1.04 |1.10
Isolation:28 dB | 20 dB (with matched Water Load Assembly)
Insertion Loss:0.3 dB (max), 0.15 dB (typical)
Coolant:City Water, Distilled Water, Glycol
Temperature:70 – 80°F (21 – 26°C), no waveguide condensation
Pressure:150 PSIG Max
Flow Rate:2 – 3 Gallons per minute
Flanges:CPR-975F (WR-975 Standard EIA 18-Hole Pattern)
Coolant Fittings:37° Flare for 3/8 O.D. Tubing
Arc Detector Port:3/8 – 24 UNF
Light Test Port:3/8 – 24 UNF
Weight:150 lbs. (68 kg)
Storage Temperature:14 to 158°F (-10 to +70°C)
WR975 Waveguide UHF Band, 75 kW Circulators

To discuss your application, or to learn more about FMT’s WR975 Waveguide UHF Band Circulators, please contact our support team at sales@microwavetechniques.com. We look forward to working with you on your next microwave project!

WR975 Waveguide UHF Ferrite
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