Abstract: A general solution to the problem of diffraction from a perfectly conducting sphere with a concentric shell spaced any distance from the surface of the sphere is presented. If the shell ...

Beveridge and Denbigh 1 have directed attention to the development of a concentric shell of zinc oxide when a compressed sphere of zinc sulphide powder was oxidized in air at 1,250° C. This shell was ...

Is your feature request related to a problem? When I use Concentric Top/Bottom shells it starts printing outside moving inward. After a while it will retract, lift, and move deeper into the center of ...

Abstract: Electrically small antenna formed by planar loop with a “shell” of three concentric split loops with the relative outer size ka = 0.40 has been designed with complex input impedance Zin ~ 22 ...