Method and apparatus for controlling an antenna

A method, comprising:

• coupling a primary antenna to an auxiliary antenna portion with a current-controlled switch;
• generating a unidirectional direct current or a first bias voltage having a first polarity to cause the current-controlled switch to substantially form a conduction channel between the primary antenna and the auxiliary antenna portion, wherein a first resonance frequency range of the primary antenna is frequency shifted to a second resonance frequency range while the conduction channel is present;
• and
• removing the unidirectional direct current or generating a second bias voltage having a second polarity to cause the current-controlled switch to form an open circuit between the primary antenna and the auxiliary antenna portion, wherein the first resonance frequency range of the primary antenna is restored while the open circuit is present.

A communication device, comprising:

• an antenna structure, comprising:
• a primary antenna portion;
• an auxiliary antenna portion;
• and
• a switch coupled to a signal source, wherein the switch conducts only unidirectional current, and wherein the primary antenna portion is coupled to the auxiliary antenna portion by way of the switch;
• a memory to store instructions;
• and
• a processor coupled to the signal source, and the memory, wherein responsive to executing the instructions, the processor performs operations comprising:
• causing the signal source to generate a first signal that causes the switch to substantially form a first conduction channel between the primary antenna portion and the auxiliary antenna portion, wherein a first low band resonance frequency range of the primary antenna portion is frequency shifted to a second low band resonance frequency range while the first conduction channel is present;
• and
• causing the signal source to generate a second signal that causes the switch to form an first open circuit between the primary antenna portion and the auxiliary antenna portion, wherein the first low band resonance frequency range of the primary antenna portion is restored while the first open circuit is present.