Wideband conical spiral antenna
AssigneeThe Boeing Company
InventorsSonja A. Berry, James R. Gilbert
Life of this patent
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Abstract
A spiral antenna having a horizontal member that terminates wires for conducting and radiating signals provides increased efficiency over the HF transmission range in a smaller size construction. A load having a parallel RLC circuit is provided at about the center of the horizontal member. The wires are provided in an elliptical pattern with the spacing between wires provided arithmetically. The wires are further configured symmetrically around a vertical support member. A balun transformer is also provided for impedance matching with a feed line.
Claims25
A conical spiral antenna comprising:
- a conductor member configured in a conical spiral arrangement for transmitting and receiving signals;
- and
- a horizontal member adapted for terminating the conductor to thereby provide improved conducted and radiated efficiency for the signals.
A conical spiral antenna adapted for portability and improved efficiency in operation over a high frequency transmission range, the conical spiral antenna comprising:
- a collapsible vertical support member configured orthogonally to a mounting surface on which the vertical support member is mounted;
- a conical spiral conductor configured in a generally symmetrical elliptical pattern around the collapsible vertical support member, and having arithmetically spaced spirals;
- a horizontal base member adapted to terminate the conical spiral conductor at a base of the conical spiral conductor;
- and
- a load at about the center of the horizontal base member, the load including a parallel RLC circuit.
A method of constructing an antenna adapted for ease in setup and transportation and providing improved operation over the high frequency transmission range, the method comprising the steps of:
- configuring a conductor in a symmetrical conical spiral arrangement, with each spiral having a generally elliptical shape;
- and
- providing a horizontal member at a base of the conductor for terminating the conductor.
Dependencies are inferred from the claim text.