In-glass antenna element matching

• US 6,417,811 B1
• Filed: 03/30/2001
• Issued: 07/09/2002
• Est. Priority Date: 03/30/2001
• Status: Expired due to Fees

• Current Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Adrian, Andrew
• Primary Examiner(s): Ho, Tan
• Application Number:
  US09/821,889
• Time in Patent Office: 466 Days
• Field of Search: 343/711, 343/712, 343/713, 343/767, 343/770, 343/860, 343/861
• US Class Current: 343/713
• CPC Class Codes: H01Q 1/1271 for mounting on windscreens
• CPC Class Codes: H01Q 1/3283 side-mounted antennas, e.g. bumper-mounted, door-mounted mounted on windscreens H01Q1/1271
• CPC Class Codes: H01Q 13/10 Resonant slot antennas

Abstract

An in-glass antenna system for a window with adjustable impedance for impedance matching. The in-glass antenna system includes an in-glass slot antenna that is defined by an upper portion, a lower portion and two respective side portions. An in-glass impedance matching circuit is connected to the slot antenna, wherein the impedance matching circuit adjusts the impedance of said slot antenna.

Claims

1. An in-glass FM antenna system with adjustable impedance for a window, comprising:

an in-glass FM slot antenna defined by an upper portion, a lower portion and two respective side portions of an electrically conductive member; and

an in-glass impedance matching circuit connected to said in-glass slot antenna, said in-glass impedance matching circuit being located within said in-glass FM slot antenna, wherein said in-glass impedance matching circuit is capable of adjusting the impedance of said in-glass FM slot antenna.

2. The in-glass antenna system of claim 1, wherein said impedance matching circuit comprises an in-glass conductive trace connected to predetermined point on the lower portion of the electrically conductive member of said in-glass FM slot antenna.

3. The in-glass antenna system of claim 2, wherein said in-glass conductive trace runs substantially parallel with the lower portion of said in-glass slot antenna.

4. The in-glass antenna system of claim 2, wherein the length of said in-glass conductive trace is adjusted to adjust the impedance of said in-glass FM slot antenna.

5. The in-glass antenna system of claim 2, wherein the width of said in-glass conductive trace is adjusted to adjust the impedance of said in-glass FM slot antenna.

6. The in-glass antenna system of claim 2, wherein a first end of said in-glass conductive trace is connected to a predetermined point on said in-glass slot antenna.

7. The in-glass antenna system of claim 2, wherein a second end of said in-glass conductive trace is routed out of said window and used as a radio signal transmission line.

8. An in-glass FM antenna system with adjustable impedance for a window, comprising:

an in-glass FM slot antenna comprised at least in part of an in-glass antenna conductive trace that runs substantially parallel with a horizontal portion of said window;

a second in-glass conductive trace connected to said in-glass antenna conductive trace that runs substantially parallel with the horizontal portion of said window for a predetermined distance, said second conductive trace being located within said in-glass FM slot antenna, wherein a first end of said second in-glass conductive trace is grounded and a second end of said second in-glass conductive trace is used as a radio signal transmission line; and

wherein said predetermined distance, the spacing of said second conductive trace from an edge of said window and the width of said second in-glass conductive trace are adjusted to thereby adjust the impedance of said in-glass FM slot antenna.

9. An in-glass FM antenna system with adjustable impedance for a window, comprising:

an in-glass FM slot antenna that is comprised at least in part of an in-glass antenna conductive trace that runs substantially parallel with a horizontal portion of said window;

a second in-glass conductive trace connected to said in-glass antenna conductive trace that runs substantially parallel with the horizontal portion of said window for a predetermined distance, said second conductive trace being located within said in-glass FM slot antenna, wherein a first end of said second in-glass conductive trace is grounded and a second end of said second in-glass conductive trace is used as a radio signal transmission line; and

wherein said predetermined distance is adjusted thereby adjusting the impedance of said in-glass FM slot antenna.

10. The in-glass antenna system of claim 9, wherein the spacing of said second in-glass conductive trace from the horizontal portion of said window is adjusted to adjust the impedance of said in-glass FM slot antenna.

11. The in-glass antenna system of claim 9, wherein the width of said second in-glass conductive trace from the horizontal portion of said window is adjusted to adjust the impedance of said in-glass FM slot antenna.

12. An in-glass FM antenna system with adjustable impedance for a window, comprising:

an in-glass FM slot antenna that is comprised at least in part of an in-glass antenna conductive trace that runs substantially parallel with a horizontal portion of said window;

a second in-glass conductive trace connected to said in-glass antenna conductive trace that runs substantially parallel with the horizontal portion of said window for a predetermined distance, said second conductive trace being located within said in-glass FM slot antenna, wherein a first end of said second in-glass conductive trace is grounded and a second end of said second in-glass conductive trace is used as a radio signal transmission line; and

wherein the spacing of said second in-glass conductive trace from the horizontal portion of said window is adjusted to thereby adjust the impedance of said in-glass FM slot antenna.

13. The in-glass antenna system of claim 12, wherein said predetermined distance is adjusted to adjust the impedance of said in-glass FM slot antenna.

14. The in-glass antenna system of claim 12, wherein the width of said second in-glass conductive trace is adjusted to adjust the impedance of said in-glass FM slot antenna.

15. An in-glass FM antenna system with adjustable impedance for a window, comprising:

an in-glass FM slot antenna comprised at least in part of an in-glass antenna conductive trace that runs substantially parallel with a horizontal portion of said window;

a second in-glass conductive trace connected to said in-glass antenna conductive trace that runs substantially parallel with the horizontal portion of said window for a predetermined distance, said second conductive trace being located within said in-glass FM slot antenna, wherein a first end of said second in-glass conductive trace is grounded and a second end of said second in-glass conductive trace is used as a radio signal transmission line; and

wherein the width of said second in-glass conductive trace can be adjusted, thereby adjusting the impedance of said in-glass FM slot antenna.

16. The in-glass antenna system of claim 15, wherein said predetermined distance is adjusted to adjust the impedance of said in-glass FM slot antenna.

17. The in-glass antenna system of claim 15, wherein the spacing of said second in-glass conductive trace from the horizontal portion of said window is adjusted to thereby adjust the impedance of said in-glass FM slot antenna.

18. A method of providing an in-glass FM antenna system with adjustable impedance for impedance matching in a window, comprising:

providing a FM slot antenna including an in-glass antenna conductive trace that runs substantially parallel with a horizontal plane of said window;

positioning an in-glass second conductive trace within said FM slot antenna;

connecting said in-glass second conductive trace to said in-glass antenna conductive trace that runs substantially parallel with the horizontal plane of said window for a predetermined distance, wherein a first end of said second conductive trace is grounded and a second end of said second conductive trace is used as a radio signal output line; and

adjusting the impedance of said FM slot antenna by adjusting said predetermined distance, the spacing of said in-glass second conductive trace from an edge of said window and the width of said in-glass second conductive trace.