Antenna

• US 6,300,908 B1
• Filed: 05/08/2000
• Issued: 10/09/2001
• Est. Priority Date: 09/09/1998
• Status: Expired due to Term

• Current Assignee: Universite de Limoges
• Original Assignee: Centre National De La Recherche Scientifique
• Inventors: Jecko, Francoise, Jecko, Bernard Jean-Yves
• Primary Examiner(s): Ho, Tan
• Assistant Examiner(s): CHEN, SHIH CHAO
• Application Number:
  US09/530,901
• Time in Patent Office: 519 Days
• Field of Search: H01/Q.138, 343/700.MS, 343/767, 343/768, 343/769, 343/845, 343/846, 343/848
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40

Abstract

An antenna of the type comprising a first electrically conductive surface (12), a second electrically conductive surface (14) forming a ground plane parallel to the first electrically conductive surface, and a first electrically conductive feed wire or strip (16) is provided. The first electrically conductive feed wire or strip (16) links a first terminal of a generator/receiver (20) to the first electrically conductive surface (12). A second electrically conductive feed wire or strip (17) links a second terminal of a generator/receiver (20) to the second electrically conductive surface (14). At least one electrically conductive wire or strip (18, 19) links the first electrically conductive surface (12) and the second electrically conductive surface (14). The first electrically conductive surface, the second electrically conductive surface, and the at least one electrically conductive wire or strip (18, 19) linking the first and second electrically conductive surfaces (12, 14) are all coplanar.

Claims

1. An antenna of the type comprising:

a first electrically conductive surface (12),

a second electrically conductive surface (14) forming a ground plane parallel to the first electrically conductive surface,

a first electrically conductive feed wire or strip (16), which links a first terminal of a generator/receiver (20) to the first electrically conductive surface (12),

a second electrically conductive feed wire or strip (17), which links a second terminal of a generator/receiver (20) to the second electrically conductive surface (14), and

at least one electrically conductive wire or strip (18, 19), which links the first electrically conductive surface (12) and the second electrically conductive surface (14),

wherein the first electrically conductive surface, the second electrically conductive surface, and said at least one electrically conductive wire or strip (18, 19) linking said first and second electrically conductive surfaces (12, 14) are all coplanar.

2. The antenna according to claim 1, wherein at least the first electrically conductive feed wire or strip (16) linking the generator/receiver (20) and the first electrically conductive surface (12) is also coplanar with the first and second electrically conductive surfaces (12, 14).

3. The antenna according to one of claims 1 or 2, wherein at least the second electrically conductive feed wire or strip (17) linking the generator/receiver (20) and the second electrically conductive surface (14) is also coplanar with the first and second electrically conductive surfaces (12, 14).

4. The antenna according to one of claims 1 or 2, wherein the second electrically conductive surface (14) forming a ground plane at least partially surrounds the first electrically conductive surface (12).

5. The antenna according to one of claims 1 or 2, wherein the second electrically conductive surface (14) forming a ground plane has the shape of an open ring, which almost totally surrounds the first electrically conductive surface (12).

6. The antenna according to claim 5, wherein an opening (15) made in the ground plane of the second electrically conductive surface (14) serves for passage of the wire or strip (16) ensuring the link between the generator/receiver (20) and the first electrically conductive surface (12).

7. The antenna according to claim 1, which comprises at least two electrically conductive wires or strips (18, 19) linking together the first and second electrically conductive surfaces (12, 14).

8. The antenna according to claim 1, which is made by cutting out from a conductive plane by etching the metallization of a single-sided printed circuit.

9. The antenna according to claim 1, having dimensions in the plane of the electrically conductive surfaces (12, 14) of about λ

/6 to λ

/5, where λ

represents the working wavelength.

10. The antenna according to claim 1, which comprises a dielectric substrate on the plane of the first and second electrically conductive surfaces (12, 14).

11. The antenna according to claim 1, which further comprises an associated proximity reflector for shaping radiation.

12. The antenna according to claim 1, which comprises a first surface (12) of square geometry and a ground plane of the second electrically conductive surface (14) formed of four rectilinear segments of strip, perpendicular and parallel to one another pair-wise, which almost totally surround the electrically conductive first surface (12), one of the aforesaid segments forming the ground plane of the second electrically conductive surface (14) possessing a transverse cutout (15) for the passage of a first electrically conductive strip (16) ensuring the link between the generator/receiver (20) and the first electrically conductive surface (12).

13. The antenna according to claim 12, which further comprises a rectilinear electrically conductive ground strip (18), which links an inner edge of the electrically conductive surface (14) possessing the cutout (15) and the first electrically conductive surface (12) and extends perpendicularly on their edge.

14. The antenna according to claim 12, which comprises a first electrically conductive surface (12) of square geometry whose sides have a length of the order of λ

/12 and a ground plane of electrically conductive surface (14) formed of four rectilinear segments of strip, perpendicular and parallel to one another pair-wise, of a length of about λ

/5 and of a width of about λ

/50, which almost totally surrounds the first electrically conductive surface (12).

15. The antenna according to claim 1, which comprises a connector (30) having outer shielding joined electrically to the ground plane of the second electrically conductive surface (14) and having a central conductive rod that is joined to the first electrically conductive strip (16) ensuring the link between the generator/receiver (20) and the first electrically conductive surface (12).