Wireless point multipoint system

• US 7,363,058 B2
• Filed: 11/03/2005
• Issued: 04/22/2008
• Est. Priority Date: 10/01/2002
• Status: Expired due to Term

• Current Assignee: Trango Networks, LLC
• Original Assignee: Trango Systems, Inc.
• Inventors: Gustaf, Christopher A.
• Primary Examiner(s): VO, NGUYEN THANH
• Application Number:
  US11/267,522
• Publication Number:
  US 20060170595A1
• Time in Patent Office: 901 Days
• Field of Search: 455/561, 455/562.1, 455/575.7, 455/129, 455/269, 343/702, 343/824, 343/845, 343/893, 343/700.MS
• US Class Current: 455/562.1
• CPC Class Codes: H01Q 1/2258 used with computer equipment
• CPC Class Codes: H01Q 21/0075 Stripline fed arrays H01Q21/065 takes precedence
• CPC Class Codes: H01Q 21/065 Patch antenna array
• CPC Class Codes: H01Q 25/001 Crossed polarisation dual antennas orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A patch array antenna includes a planar base on which is defined a ground plane and feed positions that are electrically isolated from the ground plane. A plurality of patch elements are configured to resonate over a predetermined frequency range. Each patch element is isolated from the ground plane and disposed on the base over the ground plane so that an air dielectric is defined between the patch element and the ground plane. Each patch element defines a resonant portion that is electrically connected to a respective feed position. A feed network is defined on the base that electrically connects the feed positions to one or more output points on the base.

Claims

1. A patch array antenna, said antenna comprising:

a planar base on which is defined a ground plane and feed positions that are electrically isolated from the ground plane;

a plurality of patch elements configured to resonate over a predetermined frequency range, each patch element

isolated from the ground plane and disposed on the base over the ground plane so that an air dielectric is defined between the patch element and the ground plane, and

defining a resonant portion;

a feed network defined on the base so that the air dielectric is between the patch elements and the feed network, wherein the feed network electrically connects the feed positions to one or more output points on the base; and

with respect to each patch element, a respective metallic connector electrically connecting the resonant portion of the patch element and a respective said feed position.

2. The antenna as in claim 1, wherein the ground plane is defined on a first planar side of the base, and the feed network is defined on a second planar side of the base opposite the first side.

3. The antenna as in claim 2, wherein the base is comprised of a polymer substrate, wherein the ground plane is comprised of a metallic foil sheet on one side of the polymer substrate, and the feed network is comprised of metallic foil traces on an opposite side of the polymer substrate.

4. The antenna as in claim 3, wherein the feed network is a corporate network extending from the feed positions to a single output point.

5. The antenna as in claim 1, wherein each patch element includes a planar metallic main portion.

6. The antenna as in claim 5, wherein the main portions are disposed in a common plane.

7. The antenna as in claim 6, wherein each patch element forms the respective metallic connector, and wherein the metallic connector extends from a resonant area of the main portion to the base and is electrically connected to a respective feed position.

8. The antenna as in claim 7, wherein each patch element includes a post extending from a non-resonant area of the main portion to the base.

9. The antenna as in claim 7, wherein the patch elements are disposed so that the main portions and metallic connectors of the patch elements are in the same alignment and define an antenna polarization.

10. A patch array antenna, said antenna comprising:

a planar base having a substrate, on a first planar side of which is defined a metallic foil ground plane and feed positions that are electrically isolated from the ground plane and extend through the substrate to an opposite second side of the substrate;

a plurality of patch elements configured to resonate over a predetermined frequency range, each patch element

isolated from the ground plane and disposed on the base over the ground plane so that an air dielectric is defined between the patch element and the ground plane,

including a planar metallic main portion defining a resonant area and disposed in a common plane with the main portions of the other patch elements, and

including a metallic first post extending from the resonant area to the base and electrically connecting the resonant area to a respective feed position,

wherein the patch elements are disposed so that the main portions and first posts of the patch elements are in the same alignment and define an antenna polarization; and

a metallic foil trace feed network defined on the second side of the substrate that electrically connects the feed positions to one or more output points on the base.

11. The antenna as in claim 10, wherein each patch element includes a second post extending from a non-resonant area of the main portion to the base.

12. The antenna as in claim 10, wherein the main portions are square shaped.

13. The antenna as in claim 11, wherein the first and second posts are stamped from the main portion.

14. A point to multipoint wireless communication system, said system comprising:

an access point configured to receive data signals from an external system, the access point having an antenna, a processor, and circuitry in communication with the access point antenna and controlled by the access point processor to transmit wireless electromagnetic signals corresponding to the data signals to, and to receive wireless electromagnetic signals from, a geographic area; and

a plurality of subscriber units disposed within the area, each said subscriber unit having an antenna, a processor and circuitry controlled by the subscriber unit processor to transmit wireless electromagnetic signals to, and receive wireless electromagnetic signals from, the access point for communication with the external system,

wherein each of the access point antenna and the subscriber unit antennas includes

a planar base on which is defined a ground plane and feed positions that are electrically isolated from the ground plane,

a plurality of patch elements configured to resonate over a predetermined frequency range, each patch element

isolated from the ground plane and disposed on the base over the ground plane so that an air dielectric is defined between the patch element and the ground plane, and

defining a resonant portion,

a feed network defined on the base so that the air dielectric is between the patch elements and the feed network, wherein the feed network electrically connects the feed positions to one or more output points on the base; and

with respect to each patch element, a respective metallic connector electrically connecting the resonant portion of the patch element and a respective said feed position.

15. The system as in claim 14, wherein the ground plane is defined on a first planar side of the base, and the feed network is defined on a second planar side of the base opposite the first side.

16. The system as in claim 15, wherein the base is comprised of a polymer substrate, wherein the ground plane is comprised of a metallic foil sheet on one side of the polymer substrate, and the feed network is comprised of metallic foil traces on an opposite side of the polymer substrate.

17. The system as in claim 14, wherein

each patch element includes a planar metallic main portion,

the main portions are disposed in a common plane, and

each patch element forms the respective a metallic connector, and wherein the metallic connector extends from a resonant area of the main portion to the base and is electrically connected to a respective feed position.

18. The system as in claim 17, wherein each patch element includes a post extending from a non-resonant area of the main portion to the base.

19. The system as in claim 17, wherein the patch elements are disposed so that the main portions and metallic connectors of the patch elements are in the same alignment and define an antenna polarization.

20. The system as in claim 19, wherein each of the access point and the subscriber units includes a first said antenna and a second said antenna respectively aligned in vertical and horizontal polarization.

21. The system as in claim 20, wherein the circuitry of each of the access point and the subscriber units is configured to selectively switch between the first antenna and the second antenna.

22. A point to multipoint wireless communication system, said system comprising:

an access point configured to receive data signals from an external system, the access point having an antenna, a processor, and circuitry in communication with the access point antenna and controlled by the access point processor to transmit wireless electromagnetic signals corresponding to the data signals to, and to receive wireless electromagnetic signals from, a geographic area; and

a plurality of subscriber units disposed within the area, each said subscriber unit having an antenna, a processor and circuitry controlled by the subscriber unit processor to transmit wireless electromagnetic signals to, and receive wireless electromagnetic signals from, the access point for communication with the external system,

wherein each of the access point antenna and the subscriber unit antennas includes

a planar base having a substrate, on a first planar side of which is defined a metallic foil ground plane and feed positions that are electrically isolated from the ground plane and extend through the substrate to an opposite second side of the substrate,

a plurality of patch elements configured to resonate over a predetermined frequency range, each patch element

isolated from the ground plane and disposed over the ground plane so that an air dielectric is defined between the patch element and the ground plane,

including a planar metallic main portion defining a resonant area and disposed in a common plane with the main portions of the other patch elements, and

including a metallic first post extending from the resonant area to the base and electrically connecting the resonant area to a respective feed position,

wherein the patch elements are disposed so that the main portions and first posts of the patch elements are in the same alignment and define an antenna polarization, and

a metallic foil trace feed network defined on the second side of the substrate that electrically connects the feed positions to one or more output points on the base.

23. The system as in claim 22, wherein each patch element includes a second post extending from a non-resonant area of the main portion to the base.

24. A patch array antenna, said antenna comprising:

a planar base on which is defined a ground plane and feed positions that are electrically isolated from the ground plane;

a plurality of patch elements configured to resonate over a predetermined frequency range, each patch element

isolated from the ground plane and disposed on the base over the ground plane so that an air dielectric is defined between the patch element and the ground plane, and

defining a resonant portion;

a feed network defined on the base so that the air dielectric is between the patch elements and the feed network; and

with respect to each patch element, a respective metallic connector electrically connecting the resonant portion of the patch element and a respective said feed position,

wherein

the feed network electrically connects the feed positions to one or more output points on the base,

the ground plane is defined on a first planar side of the base,

the feed network is defined on a second planar side of the base opposite the first side, and

the first side of the base is between the patch elements and the second side of the base.

25. The antenna as in claim 24, wherein the base is comprised of a polymer substrate, wherein the ground plane is comprised of a metallic foil sheet on one side of the polymer substrate, and the feed network is comprised of metallic foil traces on an opposite side of the polymer substrate.

26. The antenna as in claim 24, wherein the feed network is a corporate network extending from the feed positions to a single output point.