Miniaturized directoral antenna

• US 20030063033A1
• Filed: 09/25/2002
• Published: 04/03/2003
• Est. Priority Date: 09/29/2001
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Purr, Thomas, Pietig, Rainer
• Granted Patent: US 6,759,988 B2
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/245 with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
• 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 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements

Abstract

A description is given of a miniaturized directional antenna with a ceramic substrate (2) having at least one resonant printed wiring structure (3, 4, 5), in particular for use in the high-frequency and microwave ranges, which antenna is particularly suitable in that an electrically conductive motherboard (1, 11) is provided on which the substrate is arranged, while the at least one printed wiring structure (3, 4, 5) extends with one end as far as the motherboard. A radiation characteristic directed largely only in a half-space is achieved thereby.

Claims

1. A miniaturized directional antenna with a ceramic substrate having at least one resonant printed wiring structure, characterized in that an electrically conductive motherboard (1, 11) is provided on which the substrate (2) is arranged, with one end of the at least one printed wiring structure (3, 4, 5) extending as far as the motherboard.

2. A directional antenna as claimed in claim 1, characterized in that the substrate (2) is essentially cuboidal, and the at least one printed wiring structure (3, 4, 5) is equipped with a first printed wiring (31;

41;

51) located on the top side (25), which printed wiring is connected to the motherboard via a second printed wiring (32;

42;

52) running along one of the side faces (21, 22, 23, 24) of the substrate.

3. A directional antenna as claimed in claim 1, characterized in that the at least one printed wiring structure (3, 4, 5) is calculated for the excitation of quarter-wavelength resonances.

4. A directional antenna as claimed in claim 1, characterized in that, on the substrate (2), a lead-in (6) is provided for the capacitive feeding of the at least one printed wiring structure (3, 4, 5).

5. A directional antenna as claimed in claim 1, characterized in that the motherboard is formed by a P.C. motherboard (1) coated with a plating (11).

6. A printed circuit board (PCB), in particular for a mobile telecommunications device for the high-frequency and microwave ranges, characterized by a directional antenna as claimed in one of claims 1 to 5, in which the electrically conductive motherboard is formed by an area of the PCB coated with a plating (11), and the substrate (2) is arranged on the plating.

7. A telecommuncations device for the high-frequency and microwave ranges, characterized by a directional antenna as claimed in claim 6.