SECTOR ANTENNA

• US 20100033396A1
• Filed: 04/28/2008
• Published: 02/11/2010
• Est. Priority Date: 04/27/2007
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Tanabe, Kosuke, Yusa, Hiroyuki
• Granted Patent: US 7,978,144 B2
• Time in Patent Office: Days
• US Class Current: 343/834
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/42 Housings not intimately mechanically associated with radiating elements, e.g. radome
• CPC Class Codes: H01Q 21/062 using dipole aerials; H01Q21/067, H01Q21/068 take precedence
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 21/293 one unit or more being an array of identical aerial elements adaptive arrays H01Q3/2605
• 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: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/18 Vertical disposition of the antenna
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00

Abstract

A first printed circuit board for vertical polarized wave has a plurality of vertical polarized wave elements which serves as antenna elements, and a first feeder circuit which is connected to the plurality of vertical polarized wave elements. A second printed circuit board for horizontal polarized wave has a second feeder circuit which is connected to a plurality of horizontal polarized wave elements which serves as antenna elements, and is mounted with the plurality of horizontal polarized wave elements. A cutout portion is provided between the adjacent two vertical polarized wave elements of the first printed circuit board, and the first and second printed circuit boards are arranged parallel so that the horizontal polarized wave elements are arranged in the cutout portions of the first printed circuit board. A reflecting plate has a concave section extending to one direction, and the plurality of vertical polarized wave elements and the plurality of horizontal polarized wave elements are arranged alternately in one direction inside the concave section.

Claims

1. A sector antenna comprising:

a first printed circuit board for vertical polarized wave, the first printed circuit including a plurality of vertical polarized wave elements and a first feeder circuit connected to the plurality of vertical polarized wave elements;

a second printed circuit board for horizontal polarized wave, the second printed circuit board being mounted with a plurality of horizontal polarized wave elements and including a second feeder circuit connected to the plurality of horizontal polarized wave elements; and

a reflecting plate which includes a concave section extending to one direction,

wherein a cutout portion is provided between the adjacent two vertical polarized wave elements of the first printed circuit board,

the first printed circuit board and the second printed circuit board are arranged parallel so that the horizontal polarized wave elements are arranged at the cutout portions of the first printed circuit board,

the plurality of vertical polarized wave elements and the plurality of horizontal polarized wave elements are arranged alternately in the one direction inside the concave section.

2. The sector antenna according to claim 1, wherein each of the first printed circuit board and the second printed circuit board further includes a balun.

3. The sector antenna according to claim 1, wherein each of the feeder circuits includes a microstrip line.

4. The sector antenna according to claim 1, wherein the first and second printed circuit boards are arranged so as to be put through holes provided to the reflecting plate.

5. The sector antenna according to claim 1, wherein the reflecting plate has a substantially H-shaped cross section.

6. The sector antenna according to claim 1, wherein the reflecting plate has a substantially square bracket cross sectional shape.

7. The sector antenna according to claim 1, wherein a side wall of the reflecting plate constructing the concave section is thicker than a part except the side wall.

8. The sector antenna according to claim 1, wherein the reflecting plate partially includes a choke.

9. The sector antenna according to claim 1, wherein the vertical polarized wave elements are formed so as to tilt at a predetermined angle with respect to the one direction.

10. The sector antenna according to claim 1, wherein the first printed circuit board and the second printed circuit board are provided into the concave section of the reflecting plate.

11. The sector antenna according to claim 1, further comprising:

a support plate which supports the first printed circuit board and the second printed circuit board,

wherein the support plate supports the first and second printed circuit boards and the reflecting plate.

12. The sector antenna according to claim 11, wherein the first printed circuit board, the second printed circuit board and the support plate are provided into the concave section of the reflecting plate.

13. The sector antenna according to claim 5, wherein two side plates of the reflecting plate are extended to a side opposite to an arrangement side of the vertical polarized wave elements and horizontal polarized wave elements.

14. The sector antenna according to claim 7, wherein two side plates of the reflecting plate are folded back at an arrangement side of the vertical polarized wave elements and horizontal polarized wave elements, and are extended to a side opposite to the arrangement side.

15. The sector antenna according to claim 14, further comprising a radome housing the first printed circuit board, the second printed circuit board, and the reflecting plate,

wherein each extended portion of the two side plates of the reflecting plate is folded to stored in the radome.