Patent ID: 8947308
Filing Date: 2015-02-03
Classification: H01Q

Abstract:
1. An antenna structure, comprising: a primary antenna portion; and an auxiliary antenna portion, wherein the auxiliary antenna portion is coupled to the primary antenna portion by way of a current-controlled switch, wherein the current-controlled switch is coupled to a source; wherein a portion of the primary antenna portion operates at a first resonance frequency range, wherein the current-controlled switch is coupled to the primary antenna portion and to the auxiliary antenna portion, wherein the current-controlled switch substantially forms a conduction channel between the primary antenna portion and the auxiliary antenna portion responsive to the current-controlled switch receiving from the source a unidirectional direct current or a first bias voltage having a first polarity, wherein the first resonance frequency range of the primary antenna portion is frequency shifted to a second resonance frequency range while the conduction channel is present, wherein the current-controlled switch substantially forms an open circuit between the primary antenna portion and the auxiliary antenna portion responsive to the source removing the unidirectional direct current applied to the current-controlled switch or the source applying to the current-controlled switch a second bias voltage having a second polarity, and wherein the first resonance frequency range of the primary antenna portion is restored while the open circuit is present.