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US 10,381,734 B2Granted
Patch antenna with wire radiation elements for high-precision GNSS applications
AssigneeTopcon Positioning Systems, Inc.
InventorsAndrey Vitalievich Astakhov, Dmitry Vitalievich Tatarnikov, Pavel Petrovich Shamatulsky
Life of this patent
Estimating the term…
Abstract
A right-hand circularly-polarized patch antenna comprising a ground plane and a patch connected to each other with one or more wires for which the wire shape and location of the end points are selected such that they do not cause an antenna mismatch, and the electrical current carried in the wires produces an extra electromagnetic field subtracted from the patch field in the nadir direction.
Claims23
A single-band circularly-polarized antenna comprising:
- a ground plane;
- a radiating patch disposed above the ground plane;
- a dielectric disposed between the ground plane and the radiating patch;
- a plurality of wires symmetrically oriented about an antenna axis of symmetry orthogonal to the ground plane and passing through a center of the single-band circularly-polarized antenna, each wire having a first endpoint connected to the ground plane and a second endpoint connected to the radiating patch, the first endpoint and the second endpoint being connected by a horizontal wire segment connected between a first vertical wire segment and a second vertical wire segment, the horizontal wire segment being parallel with the ground plane and the radiating patch and positioned above the radiating patch, and the first vertical wire segment and the second vertical wire segment being orthogonal to the ground plane and the radiating patch;
- and
- wherein the symmetric orientation of the plurality of wires provides for generation of an electrical current through each horizontal wire segment of each wire of the plurality of wires such that a total antenna field in a nadir direction of the single-band circularly-polarized antenna is reduced.
3 more elements
A dual-band circularly-polarized antenna comprising:
- a ground plane;
- a low frequency (LF) radiating patch, the LF radiating patch disposed above the ground plane;
- a first dielectric disposed between the ground plane and the LF radiating patch;
- a high frequency (HF) radiating patch, the HF radiating patch disposed above the LF radiating patch;
- a second dielectric disposed between the HF radiating patch and the LF radiating patch;
- a plurality of reactive impedance elements symmetrically oriented about an antenna axis of symmetry orthogonal to the ground plane and passing through a center of the dual-band circularly-polarized antenna, the plurality of reactive impedance elements configured to produce a short-circuit condition in a LF band, and substantially open-circuit condition within a HF band;
- a plurality of wires symmetrically oriented about the antenna axis of symmetry orthogonal to the ground plane and passing through the center of the dual-band circularly-polarized antenna, each wire having a first endpoint connected to a first one of the reactive impedance elements with the first one of the reactive impedance elements connected to the ground plane, and a second endpoint connected to a second one of the reactive impedance elements with the second one of the reactive impedance elements connected to the LF radiating patch, the first endpoint and the second endpoint being connected by a horizontal wire segment connected between a first vertical wire segment and a second vertical wire segment, the horizontal wire segment being parallel with the ground plane and the LF radiating patch and positioned above the LF radiating patch, and the first vertical wire segment and the second vertical wire segment being orthogonal to the ground plane, the LF radiating patch and the HF radiating patch;
- and
- wherein the symmetric orientation of the plurality of wires provides for generation of an electrical current through each horizontal wire segment of each wire of the plurality of wires such that a total antenna field in a nadir direction of the dual-band circularly-polarized antenna is reduced.
6 more elements
Dependencies are inferred from the claim text.