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Antenna circuit arrangement and testing method

Imported: 23 Feb '17 | Published: 22 Oct '02

Teemu Kaiponen

USPTO - Utility Patents

Abstract

The invention concerns generally the technological field of planar antenna arrangements in portable radio devices. Especially but not exclusively the invention concerns inverted-F antenna arrangements. The invention also concerns a portable radio device equipped with such a planar antenna arrangement. And additionally the invention concerns a method for producing and testing a portable radio device comprising a planar antenna. One idea of the present invention is providing an aperture (

322) in the radiator element (

316) of the planar antenna. An RF test point (

324) is also provided for aligning the RF electronics, and the RF test point is located in such a way related to the aperture of the radiator that the test signal (

320) is easily led through the aperture. It is further advantageous that an RF switch (

324, 326) is provided for coupling/decoupling a connection between the planar antenna and the RF electronics. In a preferred embodiment the RF switch is integrated with the RF test point. The inventive arrangement thus allows testing the RF electronics after the radiator plate (

316) has been attached to the printed wired board (

334).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The novel features which are considered as characteristic of the invention are set forth in particular in the appended Claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.

FIG. 1 illustrates a prior art planar antenna,

FIG. 2 illustrates a prior art planar antenna construction in a mobile telephone,

FIG. 3 illustrates a cross section of an examplary planar-F antenna according to the invention,

FIG. 4 illustrates electrical coupling of a planar antenna to other RF circuitry,

FIG. 5 illustrates a planar antenna arrangement on a printed wired board of a mobile telephone,

FIG. 6 illustrates an exploded view of an examplary planar antenna construction according to the invention where the radiating element is attached to a plastic support element,

FIG. 7A illustrates a top view of an inverted F-antenna where the aperture is a hole,

FIG. 7B illustrates a top view of an inverted F-antenna where the aperture is bordered by the radiating element from three sides,

FIG. 7C illustrates a top view of an inverted F-antenna where the aperture is bordered by the radiating element from two sides,

FIG. 8 illustrates a flow diagram of a method for assembling and testing a radio device.

Claims

1. An antenna circuit arrangement, comprising

2. An antenna arrangement according to claim 1, characterized in that the aperture is located at the line perpendicular to the plane of the radiator element which line touches said test point.

3. An antenna arrangement according to claim 1, characterized in that the antenna circuit arrangement comprises a switch for coupling and decoupling a contact between the planar radiator element and the RF circuit.

4. An antenna arrangement according to claim 3, characterized in that said switch is integrated with said test point.

5. An antenna arrangement according to claim 3, characterized in that said switch is switchable through said aperture.

6. An antenna arrangement according to claim 5, characterized in that said contact is arranged to be decoupled by pressing said test point, and said contact is arranged to be coupled when said pressure is removed.

7. An antenna arrangement according to claim 1, characterized in that said aperture is bordered by the radiator element conductive member from at least two sides of the aperture.

8. An antenna arrangement according to claim 1, characterized in that said aperture is bordered by the radiator element conductive member from at least three sides of the aperture.

9. An antenna arrangement according to claim 1, characterized in that said aperture is a hole.

10. A portable radio device comprising an antenna arrangement, further comprising:

11. A portable radio device according to claim 10, characterized in that it is a mobile telephone.

12. A method for assembling and testing an antenna arrangement including a planar antenna and RF electronics, the planar antenna comprising a ground plane and a planar radiator which is substantially parallel with the ground plane, wherein

13. A method according to claim 12, characterized in that said steps of coupling and decoupling the antenna with the RF electronics is made by setting a switch between the planar antenna and the RF electronics in coupled/decoupled positions.

14. A method according to claim 13, characterized in that said switch is integrated with said test point.

15. A method according to claim 14, characterized in that testing the RF electronics comprises the steps of

16. A method according to claim 12, characterized in that the testing the planar antenna comprises the steps of wireless transfer of a test signal between a test circuit and the planar antenna which is coupled to the RF electronics.