Multifrequency antenna with reduced rear radiation and reception
First Claim
1. A multifrequency antenna comprising:
- a plurality of nonconducting substantially planar substrates, with a conductive layer disposed on a surface of each planar substrate of the plurality of nonconducting substantially planar substrates;
a first substrate of the plurality of nonconducting substantially planar substrates, having a transmission line disposed on a rear surface of the first substrate, and having a first conducting layer disposed on a other surface of the first substrate, with the first conducting layer including a plurality of slotted openings arrayed about an antenna axis;
a second substrate of the plurality of nonconducting substantially planar substrates, stacked on the first substrate, and having a second conducting layer disposed on a surface of the second substrate, with the second conducting layer including a multiplicity of slotted openings arrayed about an antenna axis;
a third substrate of the plurality of nonconducting substantially planar substrates, stacked on the second substrate, and having a third conducting layer disposed on a surface of the third substrate;
a lossy-dielectric-magnetic material for enclosing sides and rear of the multifrequency antenna, for preventing electromagnetic energy penetration through the rear and sides of the multifrequency antenna, with the multifrequency antenna thereby radiating and receiving electromagnetic energy from a front of the multifrequency antenna; and
an edge-diffraction reflector attached to rear of the multifrequency antenna, including at least two conducting plates and a plurality of conducting cylinders with height essentially shorter than a diameter along an axis of the multifrequency antenna.
1 Assignment
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Accused Products
Abstract
A multifrequency antenna comprising a stack of nonconductive substantially planar substrates, with a conductive layer disposed on each substrate surface. A first substrate includes transmission lines disposed on a rear surface and a conducting layer on the other surface. A second substrate is stacked on the first substrate. A conducting layer is disposed on one side of the second substrate surface. Conducting layers disposed on first and second substrates include a plurality of slotted openings arrayed about an antenna axis. A third substrate stacked on the second substrate includes a conducting layer top. A lossy dielectric-magnetic material encloses sides and rear of the multifrequency antenna, to prevent electromagnetic energy penetration through the enclosure. An edge diffraction suppresser reflector is attached in the rear surface of the multifrequency antenna, and has two or more essentially circular, conducting plates and a multitude of conducting cylinders along the axis of the multifrequency antenna.
63 Citations
25 Claims
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1. A multifrequency antenna comprising:
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a plurality of nonconducting substantially planar substrates, with a conductive layer disposed on a surface of each planar substrate of the plurality of nonconducting substantially planar substrates;
a first substrate of the plurality of nonconducting substantially planar substrates, having a transmission line disposed on a rear surface of the first substrate, and having a first conducting layer disposed on a other surface of the first substrate, with the first conducting layer including a plurality of slotted openings arrayed about an antenna axis;
a second substrate of the plurality of nonconducting substantially planar substrates, stacked on the first substrate, and having a second conducting layer disposed on a surface of the second substrate, with the second conducting layer including a multiplicity of slotted openings arrayed about an antenna axis;
a third substrate of the plurality of nonconducting substantially planar substrates, stacked on the second substrate, and having a third conducting layer disposed on a surface of the third substrate;
a lossy-dielectric-magnetic material for enclosing sides and rear of the multifrequency antenna, for preventing electromagnetic energy penetration through the rear and sides of the multifrequency antenna, with the multifrequency antenna thereby radiating and receiving electromagnetic energy from a front of the multifrequency antenna; and
an edge-diffraction reflector attached to rear of the multifrequency antenna, including at least two conducting plates and a plurality of conducting cylinders with height essentially shorter than a diameter along an axis of the multifrequency antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An improvement to a multifrequency antenna comprising:
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a lossy-dielectric-magnetic material for enclosing sides and rear of the multifrequency antenna, for preventing electromagnetic energy penetration through the rear and sides of the multifrequency antenna, with the multifrequency antenna thereby radiating and receiving electromagnetic energy from a front of the multifrequency antenna; and
an edge-diffraction reflector attached to rear of the multifrequency antenna, including at least two conducting plates and a plurality of conducting cylinders with height essentially shorter than a diameter along an axis of the multifrequency antenna. - View Dependent Claims (12, 13, 14)
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15. A multifrequency antenna comprising:
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a plurality of nonconducting substantially planar substrates, with a conductive layer disposed on a surface of each planar substrate of the plurality of nonconducting substantially planar substrates;
a first substrate of the plurality of nonconducting substantially planar substrates, having a transmission line disposed on a rear surface of the first substrate, and having a first conducting layer disposed on a other surface of the first substrate, with the first conducting layer including a plurality of slotted openings arrayed about an antenna axis;
a second substrate of the plurality of nonconducting substantially planar substrates, stacked on the first substrate, and having a second conducting layer disposed on a surface of the second substrate, with the second conducting layer including a multiplicity of slotted openings arrayed about an antenna axis;
a third substrate of the plurality of nonconducting substantially planar substrates, stacked on the second substrate, and having a third conducting layer disposed on a surface of the third substrate, and a lossy-dielectric-magnetic material for enclosing sides and rear of the multifrequency antenna, for preventing electromagnetic energy penetration through the rear and sides of the multifrequency antenna, with the multifrequency antenna thereby radiating and receiving electromagnetic energy from a front of the multifrequency antenna. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification