Dual-polarized dual-band broad beamwidth directive patch antenna

Patent metadata

Field	Value
Publication number	US-9728856-B2
Application number	US-201313934953-A
Country	US
Kind code	B2
Filing date	Jul 3, 2013
Priority date	Apr 6, 2009
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

An antenna architecture with a dual-band patch antenna structure having a broadened low-frequency beamwidth is disclosed. The dual band antenna structure comprises a high frequency patch antenna cavity stacked inline above a low frequency patch antenna cavity. An N-shaped metallic wall surrounds the low frequency patch antenna cavity and broadens the emission radiation beamwidth of the low frequency emission. As such, these dual band antenna structures can emit radiation with a beamwidth of approximately 90 degrees in the low frequency band of 700 MHz to 900 MHz as well as the high frequency band of 1.7 GHz to 2.2 GHz.

First claim

What is claimed is:

1. A dual band antenna radiating structure, comprising:
a first high-band patch radiating element that comprises an electrically conductive plane for radiative coupling with high-band RF energy fed via at least one high-band feed located below the first high band patch radiating element;
a second high-hand patch radiating element comprising an electrically conductive plane configured above and spaced apart from said first high-band patch radiating element in a radiating direction, the second high-band patch radiating element comprising a secondary radiating patch;
a first low-band patch radiating element comprising an electrically conductive plane configured between the first high-band patch and the second high-band patch, the low-band patch radiating element including an aperture that enables the second high-band radiating element to be radiatively coupled with the first high-band patch radiating element;
a second low-band patch radiating element configured below and spaced apart from the first low-band patch radiating element and comprising an electrically conductive plane having an aperture for radiative coupling with low-band RF energy fed via at least one low-band feed that is configured on a dielectric sheet below and spaced apart from the second low-band patch radiating element; and
a metallic perimeter structure, configured around the edges of said first and second high-band patch radiating elements, comprising at least first, second and third wall sections extending generally in the radiating direction, none of which wall sections extends generally perpendicular to the radiating direction, wherein said first wall section is configured with one end positioned in close proximity to said first high-band patch radiating element and the other end extending in the radiating direction is oriented away from said first high-band patch radiating element, wherein said second wall section is configured with one end coupled to the first wall section and the other end of said second wall section is oriented generally away from the radiating direction, and wherein said third wall section is configured with one end coupled to the second wall and the other end of said third section is oriented generally in the radiating direction and wherein the metallic perimeter structure has a cross section that is substantially in the shape of the letter “N” to form a continuous N-shaped wall and wherein at least two of the wall sections are angled relative to each other.

2. The antenna radiating structure as set out in claim 1 , wherein said metallic perimeter structure is recessed from the top surface of said second patch radiating element.

3. The antenna radiating structure as set out in claim 2 , wherein the third wall section extends further in the radiating direction than said first and second wall sections.

4. The antenna radiating structure as set out in claim 1 , wherein said second high-band patch radiating element comprises a planar surface and wherein at least one of the wall sections has a planar surface oriented at an angle of a few degrees relative to a direction normal to the planar surface comprised by the second high-band patch radiating element.

5. The antenna radiating structure as set out in claim 4 , wherein said first and third wall sections each have a planar surface oriented at an angle of a few degrees relative to the surface normal of said first patch radiating element and oriented away from the first patch radiating element and wherein said second wall section has a planar surface oriented at an angle of a few degrees relative to the surface normal of said first patch radiating element and oriented toward the first patch radiating element.

6. The antenna radiating structure as set out in claim 5 , wherein the planar surfaces of said first and third wall sections are substantially parallel.

7. The antenna radiating structure as set out in claim 1 , wherein the N-shaped wall has four sides around the perimeter of the first low-band patch radiating element, wherein the length of each side of the N-shaped wall measured in the direction parallel to the surface of the first low-band patch radiating element is approximately one half of a radiation emission wavelength of the first low-band patch radiating element.

8. The antenna radiating structure as set out in claim 1 , further comprising a metallic partial enclosure having a cavity containing the first and second low-band patch radiating elements and wherein the height of the N-shaped wall in the radiating direction is in the range of approximately 0.5 to approximately 0.75 of the distance of said first low-band patch radiating element above the bottom of said cavity.

9. The dual band antenna radiating structure as set out in claim 1 , wherein one of the dual bands is in the range of approximately 700 MHz to approximately 900 MHz.

10. A dual band antenna radiating structure, comprising:
a low-frequency patch antenna structure comprising a first low-frequency generally planar radiating element comprising an electrically conductive plane having an aperture for radiative coupling with low-band RF energy fed via at least one low-band feed configured on a dielectric sheet below and spaced apart from the first low-frequency generally planar radiating element, and a second low-frequency generally planar radiating element configured above and spaced apart from said first low-frequency generally planar radiating element in the radiating direction;
a high-frequency patch antenna structure comprising a first high-frequency generally planar radiating element and a second high-frequency generally planar radiating element configured above and spaced apart from said first high-frequency generally planar radiating element in the radiating direction, wherein at least part of said high-frequency patch antenna structure is positioned above said low frequency patch antenna structure in a radiating direction;
a metallic perimeter structure, configured around the edges of said low-frequency patch antenna structure, including one or more walls oriented at an angle that is other than generally perpendicular to the radiating direction, and wherein said metallic perimeter is substantially in the shape of the letter “N” to form an N-shaped wall; and
a metallic partial enclosure having a high-frequency cavity containing the first and second high-frequency generally planar radiating elements and a low-frequency cavity containing the first and second low-frequency generally planar radiating elements, wherein said high-frequency cavity extends partially into said low-frequency cavity.

11. The dual band antenna radiating structure as set out in claim 10 , wherein said metallic perimeter structure is below the top surface of said second high-frequency generally planar radiating element.

12. The dual band antenna radiating structure as set out in claim 11 , wherein said metallic perimeter structure comprises at least first, second and third wall sections extending generally in the radiating direction and wherein at least two of the wall sections are angled relative to each other.

13. The dual band antenna radiating structure as set out in claim 10 , wherein one of the dual bands is a low-frequency band in the range of approximately 700 MHz to approximately 900 MHz and wherein the other of the dual bands is in a high-frequency band in the range of approximately 1.7 GHz to 2.2 GHz.

14. An antenna array, comprising:
a ground plane;
first and second dual band antenna structures coupled to the ground plane, each comprising:
a low-frequency patch antenna structure comprising a first low-frequency generally plana

Assignees

• Intel Corp

Inventors

• Foo Senglee

Classifications

• H01Q9/0414 Primary

  in a stacked or folded configuration · CPC title

• H01Q15/18

  comprising plurality of mutually inclined plane surfaces, e.g. corner reflector {(H01Q15/16 takes precedence)} · CPC title

• H01Q5/42

  using two or more imbricated arrays (H01Q5/49 takes precedence) · CPC title