Ferrite Microwave Technologies manufactures high power waveguide isolators in WR28 to WR2300 spanning the UHF, L, S, C, X, Ku, K & Ka Bands. In short, an isolator is essentially a microwave circulator with a load attached. Their main purpose is to act as one way valves for energy. In addition, isolators protect RF power sources from reflected power.
High Power Waveguide Isolators: FMT Designs
FMT’s isolator designs place emphasis on the selection and bias point of ferrite material. The main objectives in our design, engineering, and manufacturing processes are to minimize insertion loss and maximize isolation. Ferrite delivers high-power solutions at the frequency, bandwidth and power level of interest. The design catalog of FMT components exceeds 1400 models to choose from, which in turn, gives us a solid foundation for custom solutions.
Ferrite has a longstanding history of supplying waveguide isolators for several markets. Specific to the industrial processing marketplace, FMT is a pioneer. We were the first company to ever develop 75, 100 and 125 kW waveguide isolators for UHF processing systems. In similar fashion, Ferrite Microwave Technologies was the first company to develop a 30 kW CW three-port isolator at 2450MHz. Our legacy in the high-power microwave industry dates back over 40 years.
Product Highlights
| Waveguide Size | Frequency | Power |
| WR 650 | 1.3 GHz + 100 KHz | 7 kW CW (Any Phase) |
| WR 340 | 2450 MHz + 25 MHz | Options for 6.5kW, 3kW and 1kW |
| WR 284 | 2700 to 2900 MHz | Options for 6.0kW, 3kW and 1kW |
Isolators: How Do They Work?
At this point, you may be wondering how isolators work. Basically, an isolator directs reflections away from the power source. It usually directs these reflections into a dummy load. The diagram below represents how waveguide isolators operate, with a junction circulator configured as an isolator:
Essentially, all of Ferrite Microwave Technologies circulators can be configured to operate as duplexers or isolators, into all potential reflections up to, and including, a short circuit. FMT certainly recommends that the best approach for waveguide isolators is to have the circulator and load tuned together as an assembly.
To learn more about Ferrite Microwave Technologies waveguide isolators, please contact our support team. We look forward to working with you, learning about your application, and partnering on your next RF or microwave project!
