Characteristic of vane-loaded helix slow-wave structure

Based on the existing vane loaded helix slow wave structure, a theoretical analytic model is proposed, in which the space between the helix and metallic barrel is fully filled up with dielectric, and vanes, infinite in number and infinitely thin in thickness, are set along all over the inner wall of the barrel. By utilizing the matching method of regional electromagnetic field for individual regions, the electromagnetic field distribution in the space of three respective regions is found. And the dispersion equation, couple impedance and attenuation constant are then obtained. The propagation system of electromagnetic wave is also discussed, with S being the cross section of any shape. A principle of stored energy equilization is derived.