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US 6,486,848 B1Granted
Circular polarization antennas and methods
OwnerGregory Poilasne, Laurent Desclos +1inventors
InventorsGregory Poilasne, Laurent Desclos, Sebastian Rowson
Life of this patent
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Abstract
Antenna systems employing multiple linear polarization antennas that have capacitively loaded magnetic dipoles and that are magnetically coupled to generate a circular polarization. In a first embodiment of the present invention, two intersecting linearly polarized antennas elements are arranged to obtain a circular polarization. In a second embodiment, a first linearly polarization antenna is placed orthogonally to a second linearly polarization antenna where a single active feed excites the first linearly polarization antenna.
Claims24
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- and
- a second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, crossing with the first linearly polarized antenna, the two linearly polarized antennas being feed with a 90 degree phase shift, wherein the first linearly polarized antenna and the second linearly polarized antenna are capacitively loaded magnetic dipoles.
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, crossing with the first linearly polarized antenna, the two linearly polarized antenna being feed with a 90 degree phase shift;
- and
- micro-strip coplanar waveguide, wherein the first linearly polarized antenna intersects with the second linearly polarized antenna on the micro-strip coplanar waveguide.
1 more element
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- and
- a second linearly polarized antenna positioned orthogonally relative to the first linearly polarized antenna, the second linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization, wherein the first linearly polarized antenna and the second linearly polarized antenna are capacitively loaded magnetic dipoles.
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna positioned orthogonally relative to the first linearly polarized antenna, the second linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization;
- and
- a first feed having a first end coupled to a top plate and a second end coupled to a center conductor of a coaxial waveguide.
1 more element
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna positioned orthogonally relative to the first linearly polarized antenna, the first linearly polarized antenna being magnetically coupled to the second linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization;
- and
- a second feed having a first end coupled to a bottom plate, and a second end coupled to an outer conductor of the coaxial waveguide.
1 more element
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna positioned orthogonally relative to the first linearly polarized antenna, the second linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization;
- a bottom plate of the first linearly polarized antenna is positioned at a z1 location on z-axis;
- and
- a bottom plate of the second linearly polarized antenna is positioned at a z2 location on z-axis, wherein the z1 location on z-axis of the bottom plate of the first linearly polarized antenna is above the z2 location on z-axis of the bottom plate of the second linearly polarized antenna.
2 more elements
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna positioned orthogonally relative to the first linearly polarized antenna, the second linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization;
- a bottom plate of the first linearly polarized antenna is positioned at a z1 location on z-axis;
- and
- a bottom plate of the second linearly polarized antenna is positioned at a z2 location on z-axis, wherein the z1 location on z-axis of the bottom plate of the first linearly polarized antenna below the z2 location on z-axis of the bottom plate of the second linearly polarized antenna.
2 more elements
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna positioned orthogonally relative to the first linearly polarized antenna, the second linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second orthogonal direction, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization;
- and
- an electronic component being placed between the first linearly polarized antenna and the second linearly polarized antenna, the first linearly polarized antenna and the second linearly polarized antenna not being disturbed by the placement of the electronic component.
1 more element
A circular polarized antenna system, comprising:
- a first linearly polarized antenna having a curve shape and creating a first magnetic field in a first direction, a signal being applied to the first linearly polarized antenna;
- and
- a second linearly polarized antenna having a curve shape and a second magnetic field in a second direction, the first linearly polarized antenna being magnetically coupled to the second linearly polarized antenna, the combination of the first magnetic field and the second magnetic field resulting in a circular polarization.
A circular polarized antenna system, comprising:
- a first linearly polarized antenna creating a first magnetic field in a first direction, the first linearly polarized antenna having a first sidewall and a second sidewall, a signal being applied to the first linearly polarized antenna;
- a second linearly polarized antenna positioned orthogonally relative to the first side wall of the first linearly polarized antenna, the second linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the second linearly polarized antenna creating a second magnetic field in a second direction, the combination of the first magnetic field and the second magnetic field resulting in a first circular polarization;
- and
- a third linearly polarized antenna positioned orthogonally relative to the second side wall of the first linearly polarized antenna, the third linearly polarized antenna being magnetically coupled to the first linearly polarized antenna, the third linearly polarized antenna creating a third magnetic field in a third direction, the combination of the first magnetic field and the third magnetic field resulting in a second circular polarization.
1 more element
A circular polarized antenna system, comprising:
- a first set of antenna having a first antenna positioned orthogonal to a second antenna thereby producing a first circular polarization at a first frequency f1;
- a second set of antenna having a third antenna positioned orthogonal to a fourth antenna thereby producing a second circular polarization at a second frequency f2;
- and
- a third set of antenna having a fifth antenna positioned orthogonal to a sixth antenna thereby producing a third circular polarization at a third frequency f3.
1 more element
A circular polarized antenna system, comprising:
- a first means for creating a first magnetic field in a first direction, a signal being applied to the first means;
- and
- a second means positioned orthogonally relative to the first means, the first means being magnetically coupled to the second means, the second means creating a second magnetic field in a second direction, the combination of the first means and the second means resulting in a circular polarization, wherein the first and second means are capacitively loaded magnetic dipoles.
Dependencies are inferred from the claim text.