Metaloop Antenna with a Conducting Plate

Abstract

A metaloop antenna (MLA) has open space within its loop. This paper investigates the placement of electronic components within this space. For this, the components are generalized by a square conducting plate of perimeter length PSQR. The antenna characteristics for the MLA, for which perimeter length PMLA is larger than λ0, are evaluated by changing PSQR, where λ0 is the free space wavelength at the operating frequency. It is found that an MLA of PMLA = 1λg (with λg being the guided wavelength of the current on the loop) continues radiating a broadside beam of circular polarization until the conducting plate and the MLA are in close proximity.