Vehicular glass-mount antenna and system

• US 20050195114A1
• Filed: 11/10/2004
• Published: 09/08/2005
• Est. Priority Date: 03/05/2004
• Status: Active Grant

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Yegin, Korkut, Livengood, William R., Bally, Nazar F., Snoeyink, Randall J.
• Granted Patent: US 7,190,316 B2
• Time in Patent Office: Days
• US Class Current: 343/713
• CPC Class Codes: H01Q 1/1285 with capacitive feeding through the windscreen
• CPC Class Codes: H01Q 1/3233 particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
• CPC Class Codes: H01Q 1/325 characterised by the location of the antenna on the vehicle
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H01Q 9/0428 radiating a circular polarised wave

Abstract

An antenna system for a vehicle including a rear windshield is disclosed. The antenna system comprises a global positioning system (GPS) antenna unit including a radiating element electromagnetically coupled to an excitation element about the rear windshield glass.

Claims

1. An antenna system, comprising:

a vehicle including a rear windshield glass; and

a global positioning system antenna unit including a radiating element electromagnetically coupled to an excitation element about the rear windshield glass.

2. The antenna system according to claim 1, wherein the radiating element is a substantially rectangular top metallization including a pair of cut corners to form a right-hand-circularly polarized antenna element.

3. The antenna system according to claim 1, wherein the radiating element is a top metallization including cross-aperture.

4. The antenna system according to claim 3, wherein the top metallization comprises a silver conducting film.

5. The antenna system according to claim 3, wherein the top metallization comprises an indium peroxide optically transparent conducting film.

6. The antenna system according to claim 1, wherein the excitation element further comprises bottom metallization including a slot.

7. The antenna system according to claim 6, wherein the bottom metallization further comprises a microstripeline that circularly polarizes the antenna unit.

8. The antenna system according to claim 6, wherein the slot comprises a substantially off-centered rectangular aperture.

9. The antenna system according to claim 6, wherein the slot is further defined to include a pair of parallel slots.

10. The antenna system according to claim 1, wherein a radome covers the top metallization.

11. The antenna system according to claim 1, wherein

the radiating element is positioned on an exterior surface of the rear windshield glass, and

the excitation element is positioned on a passenger compartment interior surface of the rear windshield glass.

12. The antenna system according to claim 1, wherein

the radiating element is positioned within a pocket formed in the rear windshield glass, and

the excitation element is positioned on a passenger compartment interior surface of the rear windshield glass.

13. The antenna system according to claim 1, wherein

the radiating element is positioned on an exterior surface of the rear windshield glass, and

the excitation element is positioned within a pocket formed in the rear windshield glass.

14. The antenna system according to claim 1, wherein

the radiating element is positioned within a first pocket formed in the rear windshield glass, and

the excitation element is positioned within a second pocket formed in the rear windshield glass in an opposing relationship with respect to the radiating element.

15. The antenna system according to claim 1, wherein

the radiating element and excitation element are positioned within a pocket formed in the rear windshield glass in an opposing relationship and are spaced by an intermediate air gap.

16. The antenna system according to claim 1, wherein

the radiating element and excitation element are positioned within a pocket formed in the rear windshield glass in an opposing relationship and are spaced by an intermediate dielectric material.