Stubby loop antenna with common feed point
AssigneeMotorola, Inc.
InventorRobert Kenoun
Life of this patent
Estimating the term…
Abstract
An antenna adapted to operate in multiple frequency bands includes a first conductive loop element having a commonly driven electrical connection at both ends. The first conductive element is resonant at a first frequency. An electrical feed point is located at the commonly driven electrical connection of the first conductive element. A second conductive element includes a straight portion and a helical portion. The straight portion being is coupled to the electrical feed point and the helical portion being is located distally from the feed point. The second conductive element being resonant at a second frequency. This commonly driven loop provides for a wider bandwidth and allows for a more compact multi-band antenna.
Claims20
An antenna adapted to operate in multiple frequency bands, the antenna comprising:
- a first conductive loop element having a commonly driven electrical connection at both ends thereof, the first conductive element being resonant at a first frequency;
- an electrical feed point located at the commonly driven electrical connection of the first conductive element;
- and
- a second conductive element having a straight portion and a helical portion, the straight portion being coupled to the electrical feed point and the helical portion being located distally from the feed point, the second conductive element being resonant at a second frequency.
An antenna adapted to operate in multiple frequency bands, the antenna comprising:
- a first conductive loop element having two straight wire portions both connected to a the commonly driven electrical connection at one end and a loop portion connecting the other ends, the first conductive loop element having a high impedance point where substantially no current flows such that the two portions of the first conductive loop element between the commonly driven electrical connection and the high impedance point are resonant at a first frequency;
- an electrical feed point located at the commonly driven electrical connection of the first conductive element;
- and
- a second conductive element having a straight portion and a helical portion, the straight portion being coupled to the electrical feed point and the helical portion being located distally from the feed point, the second conductive element being resonant at a second frequency.
An antenna adapted to operate in multiple frequency bands, the antenna comprising:
- a first conductive loop element having two straight wire portions both connected to a the commonly driven electrical connection at one end and a loop portion connecting the other ends, the loop portion having a high impedance point where substantially no current flows such that the two portions of the first conductive loop element between the commonly driven electrical connection and the high impedance point are resonant at a first frequency;
- an electrical feed point located at the commonly driven electrical connection of the first conductive element;
- and
- a second conductive element having a straight portion and a helical portion, the straight portion being coupled to the electrical feed point and the helical portion being located distally from the feed point and above the first conductive loop element, the second conductive element being resonant at a second frequency.
Dependencies are inferred from the claim text.