Back to results
US 10,320,078 B2Granted
Small form factor CPL antenna with balanced fed dipole electric field radiator
AssigneeQuantalRF AG
InventorsJonathan Neil Bringuier, Ryan James Orsi, Forrest James Brown
Life of this patent
Estimating the term…
Abstract
An antenna is disclosed with a magnetic loop, a dipole electric field radiator inside the magnetic loop, and with symmetric geometry about the feed. This symmetry allows for realization of image theory and significant size reduction, whereby half of the antenna is removed and replaced by the image induced in a connected ground plane.
Claims19
A compound loop antenna, comprising:
- a magnetic loop structure having a first end and a second end formed by an opening between the first end and the second end, the first end being connected to a feed and the second end being connected to a ground, the magnetic loop structure having a loop length defined by an electrical length of the magnetic loop structure;
- a dipole positioned inside the magnetic loop structure, the dipole having a first arm and a second arm;
- a first electrical link between the first arm and the magnetic loop structure creating a 90 degree phase delay from the feed along the electrical length of the magnetic loop structure;
- and
- a second electrical link between the second arm and the magnetic loop structure creating a 270 degree phase delay from the feed along the electrical length of the magnetic loop structure;
- wherein the compound loop antenna is symmetric about an axis that passes through the opening between the first end and the second end.
3 more elements
A compound loop antenna, comprising:
- a half magnetic loop structure having a first end connected to a feed and a second end connected a ground plane structure, the half magnetic loop structure having a loop length defined by an electrical length of the half magnetic loop structure;
- a half dipole positioned inside the half magnetic loop structure, the dipole having an arm;
- an electrical link between the arm and the half magnetic loop structure creating a 90 degree phase delay from the feed along the electrical length of the half magnetic loop structure;
- and
- wherein the ground plane structure is configured to have a size that extends beyond a near-field zone of the compound loop antenna so as to create a reflective equivalent of the half magnetic loop structure, the half dipole, and the arm.
2 more elements
Dependencies are inferred from the claim text.