Claims
- 1. A multi-band antenna assembly comprising:
a first top loaded, monopole antenna; and a second top loaded, monopole antenna nested within said first top loaded antenna.
- 2. The multi-band antenna assembly of claim 1 further comprising a microstrip antenna positioned on top of said first top loaded antenna.
- 3. The multi-band antenna assembly of claim 2 further comprising a radome enclosing said first top loaded antenna, said second top loaded antenna and said microstrip antenna.
- 4. The multi-band antenna assembly of claim 3 wherein said radome mates with a ground plate of said first top loaded antenna to encapsulate said second top loaded antenna, said microstrip antenna and at least a portion of said first top loaded antenna.
- 5. The multi-band antenna assembly of claim 1 wherein:
said first top loaded antenna comprises a first conductive ground plate, a first conductive top plate, a first conductor electrically connected to said first ground plate, and a second conductor electrically connected to said first top plate; and said second top loaded antenna comprises a second conductive ground plate, a second conductive top plate, said first conductor connected to said second ground plate, and said second conductor electrically connected to said second top plate.
- 6. The multi-band antenna assembly of claim 5 wherein said second ground plate and said second top plate are positioned between said first ground plate and said first top plate.
- 7. The multi-band antenna assembly of claim 6 wherein said first top loaded antenna further comprises a first inductive shunt.
- 8. The multi-band antenna assembly of claim 7 wherein said first inductive shunt comprises at least one conductive post connecting said first ground plate to said first top plate.
- 9. The multi-band antenna assembly of claim 8 wherein said conductive post comprises two conductive posts.
- 10. The multi-band antenna assembly of claim 8 wherein said second top loaded antenna further comprises a second inductive shunt.
- 11. The multi-band antenna assembly of claim 10 wherein said second inductive shunt comprises a conductive post connecting said second ground plate to said first ground plate.
- 12. The multi-band antenna assembly of claim 1 further comprising:
a microstrip antenna positioned on top of said first top load antenna.
- 13. The multi-band antenna assembly of claim 8 wherein said post is hollow and wherein said multi-band antenna further comprises:
a microstrip antenna positioned on top of said first top load antenna; and a cable for coupling signals to or from said microstrip antenna; and wherein said cable runs through said conductive post.
- 14. The multi-band antenna assembly of claim 6 wherein said first conductor axially surrounds said second conductor.
- 15. The multi-band antenna assembly of claim 14 wherein said first and second conductors comprise a coaxial cable.
- 16. The multi-band antenna assembly of claim 15 wherein said first and second ground plates, said first and second top plates and said coaxial cable are coaxial.
RELATED APPLICATION
[0001] This application is based on U.S. Provisional Application No. 60/279,614 filed Mar. 29, 2001 entitled “Automotive Tri-Band Antenna for AMPS/PCS/GPS”, the disclosure of which is incorporated herein by reference.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60279614 |
Mar 2001 |
US |