IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0797035
(2010-06-09)
|
등록번호 |
US-8441409
(2013-05-14)
|
발명자
/ 주소 |
- Tatarnikov, Dmitry
- Astakhov, Andrey
- Stepanenko, Anton
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
4 |
초록
▼
A ground plane for reducing multipath reception comprises a convex conducting surface and an array of conducting elements disposed on at least a portion of the convex conducting surface. Embodiments of the convex conducting surface include a portion of a sphere and a sphere. Each conducting element
A ground plane for reducing multipath reception comprises a convex conducting surface and an array of conducting elements disposed on at least a portion of the convex conducting surface. Embodiments of the convex conducting surface include a portion of a sphere and a sphere. Each conducting element comprises an elongated body structure having a transverse dimension and a length, wherein the transverse dimension is substantially less than the length. The cross-section of the elongated body structure can have various user-specified shapes. Each conducting element can further comprise a tip structure. The azimuth spacings, lengths, and surface densities of the conducting elements can be functions of meridian angle. An antenna can be mounted directly on the conducting convex surface or on a conducting or dielectric support structure mounted on the conducting convex surface. System components, such as a navigation receiver, can be mounted inside the conducting convex surface.
대표청구항
▼
1. A ground plane comprising: a convex conducting surface; andan array of conducting elements disposed on a plurality of circles on at least a portion of the convex conducting surface, wherein: one of the plurality of circles has a specific corresponding meridian angle which differs from a meridian
1. A ground plane comprising: a convex conducting surface; andan array of conducting elements disposed on a plurality of circles on at least a portion of the convex conducting surface, wherein: one of the plurality of circles has a specific corresponding meridian angle which differs from a meridian angle of one other of the plurality of circles; andthe lengths of conducting elements increase as the corresponding meridian angle increases. 2. The ground plane of claim 1, wherein each conducting element in the array of conducting elements comprises an elongated body structure having a transverse dimension and a length, wherein the ratio of the transverse dimension to the length is approximately 0.01 to 0.2. 3. The ground plane of claim 2, wherein a cross-section of the elongated body structure comprises one of: an ellipse; anda triangle. 4. The ground plane of claim 2, wherein each conducting element in the array of conducting elements further comprises a tip structure. 5. The ground plane of claim 4, wherein the tip structure comprises one of: a portion of a sphere;a sphere;a portion of an ellipsoid;an ellipsoid;a cylinder;a disc;a rectangular prism;a cone;a truncated cone;an elbow; anda tee. 6. The ground plane of claim 1, wherein adjacent conducting elements disposed on a specific circle are separated by a specific increment of azimuth angle. 7. The ground plane of claim 6, wherein the specific increments of azimuth angle for at least two different specific circles are different. 8. The ground plane of claim 6, wherein the specific increments of azimuth angle for any two different specific circles are different. 9. The ground plane of claim 8, wherein the specific increment of azimuth angle for a specific circle is based at least in part on the specific corresponding meridian angle of the specific circle. 10. The ground plane of claim 1, wherein the lengths of the conducting elements disposed on at least two different specific circles are different. 11. The ground plane of claim 1, wherein the lengths of the conducting elements disposed on any two different specific circles are different. 12. The ground plane of claim 1, wherein the array of conducting elements is disposed on: a first circle having a corresponding first meridian angle, wherein each conducting element disposed on the first circle has a corresponding azimuth angle selected from a first set of azimuth angles, wherein adjacent azimuth angles in the first set of azimuth angles are separated by a first increment of azimuth angle; anda second circle having a corresponding second meridian angle, wherein each conducting element disposed on the second circle has a corresponding azimuth angle selected from a second set of azimuth angles, wherein adjacent azimuth angles in the second set of azimuth angles are separated by a second increment of azimuth angle. 13. The ground plane of claim 12, wherein the first increment of azimuth angle is equal to the second increment of azimuth angle. 14. The ground plane of claim 13, wherein the first set of azimuth angles and the second set of azimuth angles are offset by an azimuth offset angle. 15. The ground plane of claim 12, wherein the first increment of azimuth angle is not equal to the second increment of azimuth angle. 16. The ground plane of claim 1, wherein the convex conducting surface comprises a portion of a sphere and wherein the diameter of the sphere is approximately (0.5-3)λ, wherein λ is a wavelength of a global navigation satellite system signal. 17. The ground plane of claim 1, wherein the convex conducting surface comprises a sphere and wherein the diameter of the sphere is approximately (0.5-3)λ, wherein λ is a wavelength of a global navigation satellite system signal. 18. The ground plane of claim 1, wherein the convex conducting surface is represented by a function r(θ) in a spherical coordinate system with an origin O, wherein the function is r(θ)=r0−r1(θ);r(θ) is a radius from the origin O to a point on the convex conducting surface with meridian angle θ;r0 is a constant with a value ranging from approximately (0.5-1.5)λ, wherein λ is a wavelength of a global navigation satellite system signal; andr1(θ) is a user-defined function with a magnitude |r1(θ)|≦0.25λ. 19. An antenna system comprising: an antenna;a ground plane comprising: a convex conducting surface; andan array of conducting elements disposed on at least a portion of the convex conducting surface, anda system component comprising at least one of: a navigation receiver;a low noise amplifier;a signal processor;a wireless modem; anda sensor, wherein the system component is located within the convex conducting surface. 20. The antenna system of claim 19, further comprising: a dome covering the antenna. 21. The antenna system of claim 19, further comprising: a dome covering the antenna and the ground plane. 22. A ground plane comprising: a convex conducting surface; andan array of conducting elements disposed on a plurality of circles on at least a portion of the convex conducting surface, wherein: adjacent conducting elements disposed on a specific circle are separated by a specific increment of azimuth angle, the specific increments of azimuth angle are the same for all circles in the plurality of circles, a surface density of the array of conducting elements disposed on the specific circle is based at least in part on a specific corresponding meridian angle of a specific circle and is inversely proportional to the cosine of the specific corresponding meridian angle.
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