High isolation dual polarized antenna system using dipole radiating elements
First Claim
1. An antenna for simultaneously receiving separate electromagnetic signals comprising:
- a ground plane with a length and having a vertical axis along said length;
a plurality of dipole radiating elements, said radiating elements comprised of first and second co-located, orthogonal dipoles, said dipoles aligned at first and second predetermined angles with respect to said vertical axis, said radiating elements and ground plane producing first electromagnetic fields in response to said electromagnetic signals;
a plurality of non-conductive supports, said supports connected to said ground plane and perpendicular to said vertical axis and placed between selected of said plurality of dipole radiating elements;
a plurality of independent metallic parasitic elements unconnected to said dipoles and placed in a selected of said plurality of supports, said first electromagnetic fields exciting currents in said metallic parasitic elements, said currents creating second electromagnetic fields, said second electromagnetic fields canceling with portions of said first electromagnetic fields.
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0 Petitions
Accused Products
Abstract
An antenna for receiving electromagnetic signals comprises: a ground plane with a length and having a vertical axis along the length. A plurality of dipole radiating elements, the radiating elements are comprised of first and second co-located, orthogonal dipoles, the dipoles are aligned at first and second predetermined angles with respect to the vertical axis, the radiating elements and ground plane produce first electromagnetic fields in response to said electromagnetic signals. A plurality of supports, the supports are connected to the ground plane and perpendicular to the vertical axis and placed between selected of the plurality of dipole radiating elements. A plurality of metallic parasitic elements are placed in a selected of said plurality of supports, the first electromagnetic fields exciting currents in said metallic parasitic elements, the currents creating second electromagnetic fields, the second electromagnetic fields canceling with portions of the first electromagnetic fields.
102 Citations
29 Claims
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1. An antenna for simultaneously receiving separate electromagnetic signals comprising:
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a ground plane with a length and having a vertical axis along said length; a plurality of dipole radiating elements, said radiating elements comprised of first and second co-located, orthogonal dipoles, said dipoles aligned at first and second predetermined angles with respect to said vertical axis, said radiating elements and ground plane producing first electromagnetic fields in response to said electromagnetic signals; a plurality of non-conductive supports, said supports connected to said ground plane and perpendicular to said vertical axis and placed between selected of said plurality of dipole radiating elements; a plurality of independent metallic parasitic elements unconnected to said dipoles and placed in a selected of said plurality of supports, said first electromagnetic fields exciting currents in said metallic parasitic elements, said currents creating second electromagnetic fields, said second electromagnetic fields canceling with portions of said first electromagnetic fields. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An antenna for simultaneously receiving separate electromagnetic signals comprising:
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a ground plane with a length, said ground plane having a vertical axis along said length; a plurality of radiating elements, said radiating elements comprised of first and second co-located, orthogonal dipoles, said first dipoles aligned at substantially a +45 degree angle with respect to said vertical axis, said second dipoles aligned at substantially a -45 degree angle with respect to said vertical axis, said radiating elements and ground plane producing a first electromagnetic field; a plurality of non-conductive supports connected to said ground plane, said supports perpendicular to said vertical axis and placed between selected of said plurality of dipole radiating elements; a plurality of independent metallic parasitic elements unconnected to said dipoles and placed in a selected of said plurality of supports, said first electromagnetic fields exciting currents in said metallic parasitic elements, said currents creating second electromagnetic fields, said second electromagnetic fields canceling with portions of said first electromagnetic fields; and diversity reception means coupled to said plurality of radiating elements for selecting between said plurality of electrical signals. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for providing high isolation for an array of radiating elements comprising the steps of:
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simultaneously receiving separate electromagnetic signals; providing a ground plane having a vertical axis; providing a plurality of dipole radiating elements, said radiating elements comprised of first and second co-located, orthogonal dipoles, said dipoles aligned at a predetermined angle with respect to said vertical axis, said radiating elements having a top surface; producing first electromagnetic fields in said radiating elements responsive to said electromagnetic signals; providing a plurality of non-conductive supports, and placing said supports perpendicular to said vertical axis and between selected of said plurality of dipole radiating elements; providing a plurality of independent metallic parasitic elements unconnected to said dipoles and placed in a selected of said plurality of supports; exciting currents in said metallic parasitic elements; creating second electromagnetic fields radiating from said parasitic elements; and canceling with portions of said first electromagnetic fields with said second electromagnetic fields. - View Dependent Claims (17, 18)
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19. An antenna for simultaneously receiving separate electromagnetic signals comprising:
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a ground plane with a length and having a vertical axis along said length; a plurality of dipole radiating elements, said radiating elements comprised of first and second co-located, orthogonal dipoles, said dipoles aligned at first and second predetermined angles with respect to said vertical axis, said radiating elements producing first electromagnetic fields in response to said electromagnetic signals; a plurality of non-conductive supports, said supports connected to said ground plane and parallel to said vertical axis and placed adjacent selected of said plurality of dipole radiating elements; a plurality of independent metallic parasitic elements unconnected to said dipoles and placed in a selected of said plurality of supports, said first electromagnetic fields exciting currents in said metallic parasitic elements, said currents creating second electromagnetic fields, said second electromagnetic fields canceling with portions of said first electromagnetic fields. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A method for providing high isolation for an array of radiating elements comprising the steps of:
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simultaneously receiving separate electromagnetic signals; providing a ground plane having a vertical axis; providing a plurality of dipole radiating elements, said radiating elements comprised of first and second co-located, orthogonal dipoles, said dipoles aligned at a predetermined angle with respect to said vertical axis, said radiating elements having a top surface; producing first electromagnetic fields in said radiating elements responsive to said electromagnetic signals; providing a plurality of non-conductive supports, and placing said supports parallel to said vertical axis and adjacent selected of said plurality of dipole radiating elements; providing a plurality of independent metallic parasitic elements unconnected to said dipoles and placed in a selected of said plurality of supports; exciting currents in said metallic parasitic elements; creating second electromagnetic fields radiating from said parasitic elements; and canceling with portions of said first electromagnetic fields with said second electromagnetic fields. - View Dependent Claims (28, 29)
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Specification