Antenna for high frequency radio signal transmission

• US 6,310,587 B1
• Filed: 03/31/2000
• Issued: 10/30/2001
• Est. Priority Date: 05/30/1997
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Landstorfer, Friedrich, Maier, Marcus, Ruoss, Hans-Oliver, Villino, Guido
• Primary Examiner(s): Ho, Tan
• Application Number:
  US09/424,736
• Time in Patent Office: 578 Days
• Field of Search: 343/753, 343/755, 343/700.MS, 343/895, 343/911.L, 343/911.R
• US Class Current: 343/911.00R
• CPC Class Codes: H01Q 1/007 specially adapted for indoor communication
• CPC Class Codes: H01Q 1/42 Housings not intimately mechanically associated with radiating elements, e.g. radome
• CPC Class Codes: H01Q 15/08 formed of solid dielectric material
• CPC Class Codes: H01Q 19/062 for focusing

Abstract

An antenna for radiating high-frequency signals in an indoor space, the radiation cone being defined by a dielectric lens around the primary radiator. The dielectric lens includes an inner shell which is tailored to the indoor space and a hemispherical outer shell.

Claims

1. An antenna for radiating high-frequency radio signals in an indoor space, comprising:

a primary radiator; and

a dielectric lens surrounding the primary radiator, the dielectric lens defining a radiation cone, the dielectric lens including an inner shell and a hemispherical outer shell, the inner shell being tailored to dimensions of the indoor space.

2. The antenna according to claim 1, wherein the dielectric lens includes polyethylene.

3. The antenna according to claim 1, wherein the outer shell has a dielectric coating.

4. The antenna according to claim 1, wherein the primary radiator includes a waveguide having a helix antenna.

5. The antenna according to claim 1, wherein the primary radiator includes a waveguide having a patch antenna.

6. The antenna according to claim 1, wherein the primary radiator includes a waveguide.

7. The antenna according to claim 1, wherein the radio signals are circularly polarized.

8. The antenna according to claim 1, wherein the outer shell has grooves.

9. The antenna according to claim 1, wherein the outer shell has grooves, and wherein the grooves are smallerthan the wavelength in a substrate secured to the lens.

10. The antenna according to claim 1, wherein the outer shell has grooves, and wherein the grooves are 0.5 mm wide and 1.0 mm deep.

11. The antenna according to claim 1, wherein the antenna is in direct communication with a mobile station.

12. The antenna according to claim 1, wherein the antenna is located on the ceiling of the indoor space.

13. The antenna according to claim 1, wherein data transmission from the antenna is at 60 GHz frequency.

14. The antenna according to claim 1, wherein transmitting power supplied to a distant mobile station is different than the transmitting power supplied to a closer mobile station.

15. The antenna according to claim 1, wherein the primary radiator protrudes into the dielectric lens.

16. The antenna according to claim 1, wherein the dielectric lens has ε

_r=2.14.

17. An antenna for radiating high-frequency radio signals in an indoor space, comprising:

a primary radiator; and

a dielectric lens surrounding the primary radiator, the dielectric lens hemispherical outer shell, the inner shell being tailored to dimensions of the indoor space, wherein the outer shell has rotationally symmetrical grooves which form a λ

/4 layer.