Antenna of small volume for a portable radio appliance

• US 6,927,731 B2
• Filed: 05/09/2003
• Issued: 08/09/2005
• Est. Priority Date: 12/23/2002
• Status: Expired due to Fees

• Current Assignee: Amphenol Socapex (Amphenol Corporation)
• Original Assignee: Amphenol Socapex (Amphenol Corporation)
• Inventors: Leclerc, Daniel, Vincent, Roland, Annabi, Ayoub
• Primary Examiner(s): Wimer, Michael C.
• Application Number:
  US10/434,124
• Publication Number:
  US 20040119651A1
• Time in Patent Office: 823 Days
• Field of Search: 343/700.MS, 343/702, 343/789
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 5/371 Branching current paths
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• CPC Class Codes: H01Q 9/145 by varying the electrical length
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

The present invention provides a very small volume and broad band antenna for a portable appliance including a transceiver module with an independent ground and an antenna feed conductor, the antenna comprising a first conductive surface lying substantially in a first geometrical surface of non-closed curvilinear shape surrounding an inside space and connectable to the independent ground of the transceiver module of the appliance; and a second conductive surface disposed substantially in a second geometrical surface substantially coinciding with the first geometrical surface and situated in the inside space, and forming a radiating assembly connectable to the antenna feed conductor; whereby the antenna is semi-independent of the elements of the appliance.

Claims

1. A very small volume and broad band antenna for a portable appliance including a transceiver module with an independent ground and an antenna feed conductor, the antenna comprising:

a first conductive surface lying substantially in a first geometrical surface of non-closed curvilinear shape surrounding an inside space and connectable at a single electrical connecting point to said independent ground of the transceiver module of said appliance, wherein the curvilinear shape defines a loon with first and second spaced apart ends forming an opening therebetween; and

a second conductive surface disposed substantially in a second geometrical surface substantially coinciding with said first geometrical surface and situated in said inside space, and forming a radiating assembly connectable to said antenna feed conductor;

whereby said antenna is semi-independent of the elements of said appliance.

2. An antenna according to claim 1, wherein said first surface is substantially in the form of a non-closed conductive strip whose mean line is polygonal in shape, defining an opening between said first and second spaced apart ends.

3. An antenna according to claim 1, wherein said opening is less than or equal to 3 mm wide.

4. An antenna according to claim 2, wherein said second surface defines at least two radiating elements of lengths adapted to resonate in the working frequency ranges of the antenna.

5. An antenna according to claim 1, wherein said second surface defines a connection zone and a plurality of radiating elements corresponding to working frequency ranges.

6. An antenna according to claim 4, wherein the strip forming said first surface is tuned to one of the radiating elements.

7. An antenna according to claim 6, wherein said first surface further comprises at least one conductive extension in addition to said strip, the extension being electrically connected to said strip.

8. An antenna according to claim 1, further comprising at least one active or passive component electrically connected to at least one of said conductive surfaces.

9. An antenna according to claim 8, wherein said component is active and the DC power supply for said active component is delivered via the radiofrequency coaxial feed to the antenna.

10. An antenna according to claim 1, further comprising a coaxial connector connected to each of said conductive surfaces.

11. An antenna according to claim 1, further comprising a two-channel connector, each channel being respectively connected to one of said two conductive surfaces.

12. An antenna according to claim 1, further comprising a rigid or flexible insulating support having said first and second conductive surfaces made on one of its faces.

13. An antenna according to claim 1, wherein said conductive surfaces are made of machined conductive sheet metal.

14. An antenna according to claim 1, wherein said geometrical surfaces are curved.

15. An antenna according to claim 1, wherein said geometrical surfaces are plane.

16. A very small volume and broad band antenna for a portable appliance including a transceiver module with an independent ground and an antenna feed conductor, the antenna comprising:

a first conductive surface having first and second spaced apart ends lying substantially in a first geometrical surface and electrically connected at a single point to said independent ground, wherein said first conductive surface is substantially in the form of a non-closed conductive strip having a mean line in the shape of a polygon forming an interior space and having an opening between said first and second ends; and

second conductive surface disposed substantially in a second geometrical surface substantially coinciding with said first geometrical surface and situated substantially within said interior space, and forming a radiating assembly adapted to be connected to said antenna feed conductor.

17. An antenna according to claim 16, further comprising at least one active or passive component electrically connected to at least one of said first or second conductive surfaces.

18. An antenna according to claim 16, further comprising a two-channel connector, each channel being respectively connected to at least one of said first and second conductive surfaces.

19. An antenna according to claim 16, further comprising a rigid or flexible insulating support having at least one surface, wherein said first and second conductive surfaces are attached to said insulating support surface.