Patent ID: 9178278
Filing Date: 2015-11-03
Classification: H01Q

Abstract:
1. A loop antenna configured to operate in at least one communications band, comprising: a loop antenna resonating element formed from a sheet of conductive material that is wrapped around an axis to form a conductive loop, wherein the loop antenna resonating element has a main body portion and an extended tail portion, and the main body portion and the extended tail portion are configured so that the loop antenna does not support waveguide modes for signals in the at least one communications band; a dielectric support structure on which the sheet of conductive material is formed that supports the sheet of conductive material and comprises a wall of dielectric material that extends around the axis to surround a cavity, wherein the wall is characterized by a thickness that has different thickness values at different positions along the axis; and an antenna feed structure that that is configured to indirectly feed the loop antenna resonating element, wherein the antenna feed structure comprises a loop-shaped metal trace on the dielectric support structure, and the sheet of conductive material has a ground plane recess adjacent to the loop-shaped metal trace.