Antenna structure having patch elements

• US 7,920,094 B2
• Filed: 06/17/2005
• Issued: 04/05/2011
• Est. Priority Date: 08/17/2004
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hansen, Thomas
• Primary Examiner(s): DINH, TRINH VO
• Application Number:
  US11/660,424
• Publication Number:
  US 20080211720A1
• Time in Patent Office: 2,118 Days
• Field of Search: 343/700.MS, 343/846, 343/737, 343/770, 343/824, 343/853
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 21/0075 Stripline fed arrays H01Q21/065 takes precedence
• CPC Class Codes: H01Q 21/065 Patch antenna array
• CPC Class Codes: H01Q 9/045 with particular feeding means for circular polarisation H01Q9/0428

Abstract

In an antenna structure having a plurality of serially fed patch elements, at least one of the patch elements has a slot coupling to the continuation of the feed line for influencing the radiation of this patch element.

Claims

1. An antenna structure, comprising:

a plurality of serially fed antenna columns which are situated in an elevation direction and which operate in an elevation plane;

a feed line; and

a plurality of serially fed patch elements, at least one of the patch elements having a slot coupling to a continuation of the feed line for use in the antenna columns and influencing a radiation of the at least one patch element, the continuation of the feed line varying beam formation and side lobe suppression in the elevation plane of the antenna columns;

wherein the patch elements are spaced apart from each other by a distance and are electrically isolated from each other.

2. The antenna structure according to claim 1, wherein the slot is situated in the patch element directly above and below the continuation of the feed line.

3. The antenna structure according to claim 1, wherein the slot is situated between a beginning of the continuation of the feed line and the patch element.

4. The antenna structure according to claim 3, wherein the beginning of the continuation of the feed line has a widened design.

5. The antenna structure according to claim 1, wherein the slot is situated in a path of the continuation of the feed line in an area of the patch element.

6. The antenna structure according to claim 1, wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

7. The antenna structure according to claim 1, wherein the slot is situated in the patch element directly above and below the continuation of the feed line, wherein the beginning of the continuation of the feed line has a widened design, and wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

8. The antenna structure according to claim 1, wherein the slot is situated between a beginning of the continuation of the feed line and the patch element, wherein the beginning of the continuation of the feed line has a widened design, and wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

9. The antenna structure according to claim 1, wherein the slot is situated in a path of the continuation of the feed line in an area of the patch element, wherein the beginning of the continuation of the feed line has a widened design, and wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

10. A radar sensor, comprising:

a plurality of serially fed patch elements, a serial feed path forming an antenna column within a group antenna, at least one of the patch elements having a slot coupling to a continuation of a feed line for use in the antenna column and influencing a radiation of the at least one patch element, the continuation of the feed line varying beam formation and side lobe suppression in the elevation plane of the antenna column;

wherein the patch elements are spaced apart from each other by a distance and are electrically isolated from each other, and

wherein the group antenna includes an antenna structure that includes a plurality of serially fed antenna columns which are situated in an elevation direction and which operate in an elevation plane, the feed line, and the plurality of serially fed patch elements.

11. The radar sensor according to claim 10, wherein the slot is situated in the patch element directly above and below the continuation of the feed line, and wherein the beginning of the continuation of the feed line has a widened design.

12. The radar sensor according to claim 10, wherein the slot is situated between a beginning of the continuation of the feed line and the patch element, and wherein the beginning of the continuation of the feed line has a widened design.

13. The radar sensor according to claim 10, wherein the slot is situated in a path of the continuation of the feed line in an area of the patch element, and wherein the beginning of the continuation of the feed line has a widened design.

14. The radar sensor according to claim 10, wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

15. The radar sensor according to claim 10, wherein the slot is situated in the patch element directly above and below the continuation of the feed line, wherein the beginning of the continuation of the feed line has a widened design, and wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

16. The radar sensor according to claim 10, wherein the slot is situated between a beginning of the continuation of the feed line and the patch element, wherein the beginning of the continuation of the feed line has a widened design, and wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.

17. The radar sensor according to claim 10, wherein the slot is situated in a path of the continuation of the feed line in an area of the patch element, wherein the beginning of the continuation of the feed line has a widened design, and wherein the at least one patch element having the slot coupling to the continuation of the feed line is combined with other of the patch elements within a serial feed path, the at least one patch element having the slot coupling exhibiting a higher radiation level than the other patch elements.