AN ANTENNA DEVICE, A METHOD FOR MANUFACTURING AN ANTENNA DEVICE AND A RADIO COMMUNICATION DEVICE INCLUDING AN ANTENNA DEVICE

• US 20020000940A1
• Filed: 06/21/1999
• Published: 01/03/2002
• Est. Priority Date: 06/24/1998
• Status: Abandoned Application

• Current Assignee: Allgon AB (Bure Equity AB)
• Original Assignee: Allgon AB (Bure Equity AB)
• Inventors: EDVARDSSON, OLOV, MOREN, STEFAN
• Application Number:
  US09/336,745
• Publication Number:
  US 20020000940A1
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• 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

Abstract

An antenna device for transmitting/receiving RF waves to be arranged in a radio communication device, comprising: a carrier (10) having first and second surfaces carrying a radiating structure (20) on the first surface; a feed portion (25) being connectable to transceiver circuits of the radio communication device and being arranged on the carrier (10) and forming a part of the radiating structure (20); and a ground plane means. The carrier has, in a first plane essentially perpendicular to the first surface, a cross section where the first surface exhibits at least a first curved portion (12). Further, the carrier has, in a second plane essentially perpendicular to the first plane and essentially perpendicular to the first surface, a cross section where the first surface exhibits at least a second curved portion (11, 13). Moreover, at least two curved portions meet.

Further a method for manufacturing an antenna device is disclosed. In the method, at least a part of the carrier is formed by means of a die having essentially the same shape as a portion of an inner wall of a housing of the radio communication device.

Also a hand portable radio communication device, including an antenna device is disclosed.

Claims

1. An antenna device for transmitting/receiving RF waves to be arranged in a radio communication device, comprising:

a carrier having first and second surfaces carrying a radiating structure on the first surface,

a feed portion being connectable to transceiver circuits of the radio communication device and being arranged on the carrier and forming a part of the radiating structure, and

a ground plane means,

characterised in

that the carrier has, in a first plane essentially perpendicular to the first surface, a cross section where the first surface exhibits at least a first curved portion,

that the carrier has, in a second plane essentially perpendicular to the first plane and essentially perpendicular to the first surface, a cross section where the first surface exhibits at least a second curved portion, and

that at least two curved portions meet.

2. An antenna device according to claim 1, wherein

the carrier has, in the second plane, a cross section where the first surface further exhibits a third curved portion.

3. An antenna device according to claim 1, wherein

the carrier has, in the first plane, a cross section where the first surface further exhibits a fourth curved portion.

4. An antenna device according to claim 1, wherein

the curved portions surround an essentially planar or very smoothly curved portion,

the carrier has wall portions around the curved portions, each wall portion 16 is provided with a rim 17 formed outside bent portions being approximately 90°

, at a side of the wall opposite to that of the curved portion.

5. An antenna device according to claim 1, wherein

the carrier carries a radiating structure on the second surface, in order to provide operation in at least two frequency bands.

6. An antenna device according to claim 1, wherein

each radiating structure(s) is operable in at least two frequency bands.

7. An antenna device according to claim 1, wherein

the carrier is thin and with essentially uniform thickness, the thickness being in the range some tenth of a millimeter to a few millimeters, preferably 0.2-1 millimeter.

8. An antenna device according to claim 1, wherein

the carrier is made from a polymeric sheet-like material.

9. An antenna device according to claims 1, wherein

the carrier is made from a polymeric sheet-like material which is vacuum formed.

10. An antenna device according to claim 8, wherein

a ground plane means support is formed from the same sheet-like material as the carrier,

a conductive structure, possibly conductively connectable to signal ground of the transceiver circuits of the radio communication device, being arranged on the ground plane means support.

11. An antenna device according to claim 8, wherein

a ground plane means support is formed from the same sheet-like material as the carrier,

a conductive structure, possibly capacitively connectable to signal ground of the transceiver circuits of the radio communication device, being arranged on the ground plane means support.

12. An antenna device according to claim 10, wherein

a bending initiator is arranged between the carrier and the ground plane means support in order to enable the ground plane means support to be bent approximately 180°

in relation to the carrier.

13. An antenna device according to claim 1, wherein

the ground plane means has one surface which is formed essentially conform with a printed circuit board of the radio communication device, the ground plane means is arranged to be mounted in connection with said printed circuit board.

14. An antenna device according to claim 1, wherein

the carrier is arranged to be essentially conform with a part of an interior of a housing of the radio communication device.

15. An antenna device according to claim 1, wherein

the carrier is essentially trough-shaped.

16. An antenna device according to claim 1, wherein

the radiating structure comprises at least one of the radiating structures selected from the group consisting of meander patterns, loops, patches, bent dipoles and fractals.

17. An antenna device according to claims 1, wherein

the radiating structure extends over at least one of said curved portions.

18. An antenna device according to claims 1, wherein

a convex and a concave surface is formed on the carrier by the curved portions,

an elevation on the carrier carrying the feed portion is protruding from the concave surface.

19. An antenna device according to claim 1, wherein

a matching means is arranged on the carrier and connected at a first end to the feed portion and connectable to the transceiver circuits of the radio communication device at a second end, such that the radiating structure is connectable to the transceiver circuits via the matching means.

20. A method for manufacturing an antenna device according to any of claims 1-19, characterised in

that at least a part of the carrier is formed by means of a die having essentially the same shape as a portion of an inner wall of a housing of the radio communication device.

21. A method according to claim 20, wherein

the radiating structure is placed in the die before the shaping of the carrier, and

the radiating structure is applied to the carrier during the shaping process.