Double helix antenna system

A double helix antenna system adapted for operation in a dual-band communications device, comprising:

• a first helix conductor wound in a first direction about a longitudinal axis of said double helix antenna;
• a first antenna feed network for connecting said first helix conductor to a first communications transceiver;
• a second helix conductor wound in a second direction about said longitudinal axis, said first and second helix conductors being wound so as to be orthogonal when horizontal separation is at a minimum;
• and
• a second antenna feed network for connecting said second helix conductor to a second communications transceiver.

A double helix antenna system adapted for operation in a portable communications device, comprising:

• a first helix conductor wound in a first direction about a longitudinal axis of said double antenna;
• a first antenna feed network for connecting said first helix conductor to a transmitter of said communications device;
• a second helix conductor wound in a second direction about said longitudinal axis, said first and second helix conductors being wound so as to be orthogonal when minimal horizontal separation exists;
• and
• a second antenna feed network for connecting said second helix conductor to a receiver of said communications device.

A double helix antenna, comprising:

• a cylindrical winding member;
• a first helix conductor wound in a first direction about said cylindrical winding member;
• and
• a second helix conductor wound in a second direction about said cylindrical winding member, said first and second helix conductors being wound so as to be orthogonal at points of mutual intersection.

A double helix antenna, comprising:

• a cylindrical winding member having a first end and a second end;
• a first helix conductor wound from said first end in a first direction about a first segment of said cylindrical winding member;
• and
• a second helix conductor wound from said second end in a second direction about a second segment of said cylindrical winding member, said first and second helix conductors being orthogonal at points of mutual intersection.

A double helix antenna, comprising:

• a cylindrical conductor having a first end, a second end, an outer surface, and an inner surface defining a cylindrical cavity in which is disposed an elongated conductor extending between said first and second ends;
• a first helix conductor wound from said first end in a first direction about a first segment of said outer surface, said first helix conductor being electrically connected to said elongated conductor at said first end of said cylindrical conductor;
• and
• a second helix conductor wound from said second end in a second direction about a second segment of said outer surface, said first and second helix conductors being orthogonal at points of mutual intersection.