Systems and methods for providing directional radiation fields using distributed loaded monopole antennas
AssigneeThe Board of Governors for Higher Education, State of Rhode Island and Providence Plantations
InventorRobert J. Vincent
Life of this patent
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Abstract
An antenna system is disclosed that provides a directional radiation field. The antenna system includes at least two monopole antennas, each of which provides a differential connector. Each differential connector is associated with a signal having a different phase such that a radiation field associated with said antenna system is other than a radiation field that would exist if each differential connector were associated with the signal having the same phase.
Claims21
An antenna system that provides a directional radiation field, said antenna system comprising at least two monopole antennas, each of which provides a differential connector, wherein each differential connector is associated with a signal having a different phase such that a radiation field associated with said antenna system is other than a radiation field that would exist if each differential connector were associated with the signal having the same phase.
An antenna system that provides a directional radiation field, said antenna system comprising at least two distributed load monopole antennas each of which includes a radiation resistance unit coupled to a transmitter base, a current enhancing unit for enhancing current through said radiation resistance unit;
- and a conductive mid-section intermediate said radiation resistance unit and said current enhancing unit, said conductive mid-section having a length that provides that a sufficient average current is provided over the length of the antenna, and wherein each of said two distributed load monopole antennas is coupled to a connector, and at least one connector is coupled to a phase changing device such that the directional radiation field is provided by said antenna system responsive to the phase changing device.
A method of providing a directional radiation field in an antenna system, said method comprising the steps of providing at least two monopole antennas;
- coupling at least one of the monopole antennas to a phase modulation device;
- and operating the antenna system such that each monopole antenna operates at a different phase to provide the directional radiation field.
Dependencies are inferred from the claim text.