Speaker
Description
With the growing demand for medical accelerators in ther-
apy and radioisotope production, dual-frequency high-power
RF loads are increasingly essential for power source accep-
tance testing. This work presents a dual-mode coaxial cavity
operating at 425 MHz and 714 MHz, supporting the funda-
mental TEM mode and the first higher-order TE11 mode, the
latter comprising two degenerate orthogonal polarizations.
A three-degree-of-freedom coaxial coupler achieves critical
coupling at both frequencies. A tuner at the cavity center
lifts the degeneracy, providing a controllable frequency sep-
aration, while a second tuner enables independent control of
each polarization. The design achieves dual-frequency criti-
cal coupling, effective mode separation, and compactness,
making it well suited for high-power RF load applications
in accelerator systems.
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