Adaptive tunable antenna
AssigneeL3Harris Global Communications, Inc.
InventorsJoseph Majkowski, Malcolm Packer, Luismael López Aragones
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Abstract
Adaptive tunable antenna system includes a first radiating element having an elongated length and a second radiating element extending from a distal end of the first radiating element. The first radiating element is for a high band of operation and the second radiating element is for a low-band of operation. The second radiating element is a helical member including a plurality of turns. A low-band circuit selectively bypasses one or more of the turns of the second radiating element in response to a control signal.
Claims21
An adaptive tunable antenna system, comprising
- a first radiating element having an elongated length extending from a first proximal end to a first distal end;
- a second radiating element extending from the first distal end and comprising a helical member extending along a central axis from a second proximal end to a second distal end and defining a plurality of turns;
- a diplexer configured to frequency multiplex high-band RF energy between an antenna feed and the first radiating element, and low-band RF energy, having a lower RF frequency than the high-band RF energy, between the antenna feed and the second radiating element;
- a low-band circuit at least partially disposed in an internal lumen defined by the helical member and configured to selectively bypass one or more of the plurality of turns in response to a control signal by coupling low-band RF energy from an end feed point of the second radiating element, to one or more of the plurality of turns intermediate of the second proximal end and the second distal end.
An adaptive tunable antenna system, comprising
- a first radiating element having an elongated length extending from a first proximal end to a first distal end includes a central bore extending along the elongated length;
- a second radiating element extending from the first distal end and comprising a helical member extending along a central axis from a second proximal end to a second distal end and defining a plurality of turns;
- a diplexer configured to frequency multiplex high-band RF energy between an antenna feed and the first radiating element, and low-band RF energy, having a lower RF frequency than the high-band RF energy, between the antenna feed and the second radiating element;
- a shielded transmission line coupled to a low-band port of the diplexer, the shielded transmission line extending through the central bore and connected to the low-band circuit, wherein a shield of the shielded transmission line is connected directly to the distal end of the first radiating element
- a low-band circuit including a low-band control unit at least partially disposed in an internal lumen defined by the helical member and configured to selectively bypass one or more of the plurality of turns in response to a control signal by coupling low-band RF energy from an end feed point of the second radiating element, to one or more of the plurality of turns intermediate of the second proximal end and the second distal end.
Dependencies are inferred from the claim text.