Magnetic current synthesis using cavity structures

摘要

Different from electric current, the magnetic current can't be supported on a piece of metallic wire or similar structures. It is usually designed as an equivalent concept using electric small loops. In this paper, we have proposed a method to synthesize the magnetic current in a simple but not trivial structure, compared with the existing ways. A cavity is utilized to provide an aperture to perform as magnetic current, with identical radiation fields and polarizations. Two examples of applications are proposed to adopt this technique: one is polarized multi-input-multi-output antenna with low wind drag, and the other one is horizontally polarized antenna array with E-plane omnidirectional coverage and high gain. The numerical and experimental results exhibit potential possibilities in magnetic current synthesis in a simple structure with compact dimensions.