Broadband antenna assembly of matching circuitry and ground plane conductive radiating element

• US 20020033772A1
• Filed: 08/27/2001
• Published: 03/21/2002
• Est. Priority Date: 02/27/1999
• Status: Active Grant

• Current Assignee: Tyco Electronics Logistics AG (TE Connectivity Limited)
• Original Assignee: Tyco Electronics Logistics AG (TE Connectivity Limited)
• Inventors: Hill, Robert, Johnson, Greg, Keilen, Don
• Granted Patent: US 6,646,619 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 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 13/08 Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H01Q 9/0442 with particular tuning means

Abstract

An antenna device is disclosed, which is intended for a portable radio communication device. The communication device includes a signal generating component having a signal output, said output defining a signal generating circuit impedance. The antenna device includes a substantially planar conductor having an associated impedance and preferably extending in a first dimension greater than approximately one-quarter of a predetermined operational wavelength. The antenna device further includes a matching network which is coupled to the signal generating output. The matching network having a substantially planar dielectric substrate and a conductive meander element and a conductive trace element, wherein said matching network transforms the impedance of the signal generating component to approximate the impedance of the planar conductor element.

Claims

1. A wireless communication device for receiving and transmitting a communication signal, said signal having an associated wavelength, said device comprising:

a signal generating component having a signal output, said output defining a signal generating circuit impedance;

a substantially planar conductor element operatively coupled to the signal generating component, said planar conductor element extending in a first dimension greater than approximately one-quarter of the wavelength, said planar conductor element having an associated impedance; and

a matching network disposed in relation to the signal generating component and the planar conductor element and operatively coupled to the signal generating output, said matching network having a substantially planar dielectric substrate and a conductive layer disposed upon a first major surface of the dielectric substrate, said matching network transforming the impedance of the signal generating component to approximate the impedance of the planar conductor element.

2. A wireless communication device according to claim 1, wherein the matching network is disposed proximate an edge of the planar conductor element.

3. A wireless communication device according to claim 2, wherein the conductive layer of the matching network is substantially planar, and said conductive layer of the matching network being substantially parallel to the planar conductor element.

4. A wireless communication device according to claim 3, wherein the matching network includes a second conductive layer disposed upon a second major surface of the dielectric substrate, and wherein the first conductive layer is operatively coupled to the second conductive layer.

5. A wireless communication device according to claim 4, wherein the matching network is operatively coupled to the signal generating at the first major surface.

6. A wireless communication device according to claim 1, wherein the conductor element is defined as a portion of the printed wiring board of the wireless device.

7. A wireless communication device for receiving and transmitting a communication signal, said signal having an associated wavelength, said device comprising:

a signal generating component having a signal output, said output defining a signal generating circuit impedance;

a substantially planar conductor element operatively coupled to the signal generating component, said planar conductor element extending in a first dimension greater than approximately one-quarter of the wavelength, said planar conductor element having an associated impedance; and

a matching network disposed in relation to the signal generating component and the planar conductor element and operatively coupled to the signal generating output, said matching network having a substantially planar dielectric substrate and a conductive meander element and an additional conductor element, said matching network transforming the impedance of the signal generating component to approximate the impedance of the planar conductor element.

8. A wireless communication device according to claim 7, wherein said conductive meander element has a length of approximately one quarter of the wavelength.

9. A wireless communication device according to claim 7, wherein the conductive meander element is disposed proximate a perimeter of the dielectric substrate.

10. A wireless communication device according to claim 7, wherein the signal generating component is coupled proximate an end of the meander element.

11. A wireless communication device according to claim 7, wherein the planar conductor element and the planar dielectric substrate are in an orthogonal orientation.

12. A wireless communication device according to claim 7, wherein the matching network is disposed proximate an edge of the planar conductor element.

13. A wireless communication device according to claim 7, wherein the conductive meander element and the additional conductor element are disposed upon a first major surface of the dielectric substrate.

14. A wireless communication device according to claim 7, wherein the conductive meander element and the additional conductor element are disposed upon opposed major surfaces of the dielectric substrate.