![]() ![]() The proposed isolator will be more reliable, capable of handling much higher powers and more cost-effective. Varian alone manufactures 500 such systems a year. Commercial Applications and Other Benefits: All medical linacs and linac-based security systems use RF isolators, and the market is large, e.g. Once this prototype is demonstrated to be acceptable to the customer, the same basic design can be scaled and used to build and commission production versions of isolators at S-band, X-band and Ku-band. After many iterations of the design, each iteration improved performance, we made a prototype that is currently being tested at a potential customer’s facility. Summary of Phase II Achievement (described herein): The main effort expended in this SBIR was focused on making a commercially viable isolator at X-band (9.3GHz). A compact, dry, high-power RF load was designed to be integrated with the isolator. In the actual isolator the appropriate magnetic field will be provided using permanent magnet material and a design for this magnet has been made. The device properties were tested, and the results were compared to the theoretical prediction and simulations. It was placed inside an electromagnet to characterize the garnet materials. What was done in Phase I: A test isolator microwave structure at X-band was designed more » and constructed with the ability to use different garnet materials. The isolators will be tested at high-power facilities at national labs, universities and industry. This project will design and manufacture prototypes of the isolators at the three frequencies most commonly used in industry and national laboratories. The topology of the polarizer allows for the synthesis of a scalable modular structure for arbitrary power levels. These devices are based on a recent invention of a new microwave device called the “polarizer”. These novel devices are compact and promise low cost in production. How the Problem is Being Addressed: The company proposes a new class of isolators scalable, in principle, to extremely high-power levels. High power isolators are also of interest to DOE laboratories with high energy accelerators and in these systems the power is so high, there is no viable device that can be used. The available isolators are costly and have limited reliability and power-handling capabilities. Reflected power from the accelerator can destabilize the RF system and reduce the life of the RF source requiring expensive replacement. Summary/Abstract Statement of Problem: Microwave isolators are highly desired for high-power RF (radio-frequency) systems that drive linear accelerators. ![]()
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