Measurement of the Electromagnetic-Field Components in a Rectangular Drift Tube-Loaded Cavity Using Various Perturbing Objects (Short Papers)

The electric-field quantities E, E_y, E_z, and the magnetic-field quantities H and H_x in a rectangular drift tube-loaded cavity resonating in the TE₁₀₁ mode have been measured along the z direction by means of the perturbation method using a dielectric bead, a metallic disk, a metallic needle, a metallic sphere, and a ferrite disk. The relative errors for E and E_y are 3 percent; for E_z, 10 percent on the average; whereas for H and H_z, they are 10 percent at least. The ferrite disk, being superior to the metallic sphere, offers a new technique in determining magnetic-field components in cavity resonators.