Antenna for a satellite navigation receiver
AssigneeDeere & Company
InventorMark L. Rentz
Life of this patent
Estimating the term…
Abstract
An antenna comprises notched semi-elliptical radiators. Each of the radiators has a first substantially planar surface. A ground plane has a second substantially planar surface that is generally parallel to the first substantially planar surfaces of the radiators by a generally uniform spacing. The ground plane has a central axis. Feeding members are adapted for conveying an electromagnetic signal to or from each radiator. Each of the feeding members is spaced radially outward from the central axis of the ground plane. A grounded member is coupled to each radiator and spaced apart, radially outward from the feeding spacer.
Claims27
An antenna comprising:
- a plurality of notched semi-elliptical radiators, each of the radiators having a first substantially planar surface;
- a ground plane having a second substantially planar surface that is generally parallel to the first substantially planar surfaces of the radiators by a generally uniform spacing, the ground plane having a central axis;
- a plurality of feeding members for conveying an electromagnetic signal to or from each radiator, each of the feeding members spaced radially outward from the central axis of the ground plane;
- and
- a grounded member coupled to each radiator and spaced apart, radially outward from the feeding spacer.
An antenna system comprising:
- a plurality of notched semi-elliptical radiators, each of the radiators having a first substantially planar surface;
- a ground plane having a second substantially planar surface that is generally parallel to the first substantially planar surfaces of the radiators by a generally uniform spacing, the ground plane having a central axis;
- a plurality of feeding members for conveying an electromagnetic signal to or from each radiator, each of the feeding members spaced radially outward from the central axis of the ground plane;
- a grounded member coupled to each radiator and spaced apart, radially outward from the feeding spacer;
- a plurality of impedance matching networks, each one of the respective impedance matching networks coupled to a corresponding one of the radiators for matching the impedance of each radiator to a target impedance at output nodes of the impedance matching networks;
- and
- a combiner having first ports coupled to the output nodes of the respective impedance matching networks and a second port for interfacing with a satellite navigation device.
A satellite navigation receiver wherein the improvement comprises an antenna that comprises:
- a plurality of notched semi-elliptical radiators, each of the radiators having a first substantially planar surface;
- a ground plane having a second substantially planar surface that is generally parallel to the first substantially planar surfaces of the radiators by a generally uniform spacing, the ground plane having a central axis;
- a plurality of feeding members for conveying an electromagnetic signal to or from each radiator, each of the feeding members spaced radially outward from the central axis of the ground plane;
- and
- a grounded member coupled to each radiator and spaced apart, radially outward from the feeding spacer.
Dependencies are inferred from the claim text.