Surface communication device

• US 9,070,962 B2
• Filed: 10/08/2010
• Issued: 06/30/2015
• Est. Priority Date: 10/30/2009
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Kobayashi, Naoki
• Primary Examiner(s): Lee, Benny
• Assistant Examiner(s): PATEL, RAKESH BHASKARBHAI
• Application Number:
  US13/504,448
• Publication Number:
  US 20120206314A1
• Time in Patent Office: 1,726 Days
• Field of Search: 333/24.R, 333/204, 333/236, 343/841, 455/14
• US Class Current: 1/1
• CPC Class Codes: H01P 1/2005 Electromagnetic photonic bandgaps [EPB], or photonic bandgaps [PBG]
• CPC Class Codes: H01P 3/121 integrated in a substrate
• CPC Class Codes: H04B 3/52 Systems for transmission between fixed stations via waveguides
• CPC Class Codes: H05K 1/0236 Electromagnetic band-gap structures

Abstract

A surface communication device of the present invention includes: an electromagnetic wave propagation unit which propagates electromagnetic waves and has a sheet shape; and at least one of a power feeding device unit which is disposed on the electromagnetic wave propagation unit in a non-conductive state with the electromagnetic wave propagation unit and feeds the electromagnetic waves to the electromagnetic wave propagation unit, and a reception device unit which is disposed on the electromagnetic wave propagation unit in a non-conductive state with the electromagnetic wave propagation unit and receives the electromagnetic waves propagated via the electromagnetic wave propagation unit. The at least one of the power feeding device unit and the reception device unit includes: an electromagnetic wave coupling unit which transmits the electromagnetic waves to the electromagnetic wave propagation unit or receives the electromagnetic waves from the electromagnetic wave propagation unit; and an electromagnetic wave suppression unit which includes a plurality of conductor unit structures arranged along a surface of the electromagnetic wave propagation unit so as to surround the electromagnetic wave coupling unit, and suppresses leakage of the electromagnetic waves from a space between the electromagnetic wave coupling unit and the electromagnetic wave propagation unit.

Claims

1. A surface communication device, comprising:

an electromagnetic wave propagation unit which propagates electromagnetic waves and has a sheet shape;

a power feeding device unit which feeds the electromagnetic waves to the electromagnetic wave propagation unit; and

a reception device unit which receives the electromagnetic waves propagated via the electromagnetic wave propagation unit, at least one of the power feeding device unit and the reception device unit being disposed on the electromagnetic wave propagation unit in a non- conductive and non-embedded state with the electromagnetic wave propagation unit, the at least one of the power feeding device unit and the reception device unit comprising;

an electromagnetic wave coupling unit which transmits the electromagnetic waves to the electromagnetic wave propagation unit or receives the electromagnetic waves from the electromagnetic wave propagation unit; and

an electromagnetic wave suppression unit which includes a plurality of conductor unit structures arranged along a surface of the electromagnetic wave propagation unit so as to surround the electromagnetic wave coupling unit, and suppresses leakage of the electromagnetic waves from a space between the electromagnetic wave coupling unit and the electromagnetic wave propagation unit.

2. A surface communication device, comprising:

an electromagnetic wave propagation unit which propagates electromagnetic waves and has a sheet shape; and

at least one of a power feeding device unit which is disposed on the electromagnetic wave propagation unit in a non-conductive and non-embedded state with the electromagnetic wave propagation unit and feeds the electromagnetic waves to the electromagnetic wave propagation unit, and a reception device unit which is disposed on the electromagnetic wave propagation unit in a non-conductive and non-embedded state with the electromagnetic wave propagation unit and receives the electromagnetic waves propagated via the electromagnetic wave propagation unit, the at least one of the power feeding device unit and the reception device unit comprising;

an electromagnetic wave coupling unit which transmits the electromagnetic waves to the electromagnetic wave propagation unit or receives the electromagnetic waves from the electromagnetic wave propagation unit; and

an electromagnetic wave suppression unit which includes a plurality of conductor unit structures arranged along a surface of the electromagnetic wave propagation unit so as to surround the electromagnetic wave coupling unit, and suppresses leakage of the electromagnetic waves from a space between the electromagnetic wave coupling unit and the electromagnetic wave propagation unit.

3. The surface communication device according to claim 2, wherein the plurality of conductor unit structures comprise:

a plurality of patch conductors which are disposed to face the electromagnetic wave propagation unit; and

a wire conductor which connects the plurality of patch conductors which are adjacent to each other.

4. The surface communication device according to claim 2, wherein the plurality of the conductor unit structures includes:

a reference conductor which faces the electromagnetic wave propagation unit at a distance, and has a plate shape;

a wire-shaped conductor which faces the reference conductor; and

a conductor post which connects the reference conductor and the wire-shaped conductor.

5. The surface communication device according to claim 4, wherein each of the wire-shaped conductors is respectively disposed between each of the reference conductors and the electromagnetic wave propagation unit.

6. The surface communication device according to claim 5, wherein, among two or more layers which include a layer between said each of the reference conductors and said each of the wire-shaped conductors, at least one layer of the two or more layers is configured to have a higher dielectric constant than the other layers.

7. The surface communication device according to claim 2, wherein each of the plurality of conductor unit structures respectively includes:

a reference conductor which faces the electromagnetic wave propagation unit at a distance, and has a plate shape;

a patch conductor which faces the reference conductor, and has a plate shape; and

a conductor post which connects the reference conductor and the patch conductor.

8. The surface communication device according to claim 7, wherein each of the reference conductors of the respective plurality of conductor unit structures are another patch conductors which are separated from each other.

9. The surface communication device according to claim 7, wherein each of the patch conductors is disposed on an opposite side to the electromagnetic wave propagation unit with respect to the reference conductor.

10. The surface communication device according to claim 9, wherein a dielectric constant of a space filling a layer respectively between each of the reference conductors and said each of the patch conductors is higher than a dielectric constant of at least one layer filling respectively between said each of the reference conductors and the surface of the electromagnetic wave propagation unit.

11. The surface communication device according to claim 7, wherein the plurality of conductor unit structures include two or more conductor unit structures having different positional relationships between a respective patch conductor and a respective conductor post thereof.

12. The surface communication device according to claim 7, wherein the plurality of conductor unit structures include two or more conductor unit structures in which respective patch conductors thereof have different dimensions.

13. The surface communication device according to claim 7, wherein the plurality of conductor unit structures include at least one conductor unit structure including a respective patch conductor thereof to which two or more of respective conductor posts are connected.

14. The surface communication device according to claim 13, wherein the plurality of conductor unit structures include two or more conductor unit structures in which the number of the conductor posts connecting the respective reference conductor and the respective patch conductor is different.

15. The surface communication device according to claim 7, wherein each of the reference conductors includes an opening portion in which a wire-shaped conductor is provided, and said each of the reference conductors and each of the conductor posts are respectively connected by the wire-shaped conductor.

16. The surface communication device according to claim 7, wherein each of the patch conductors has an opening portion in which a wire-shaped conductor is provided, and said each of the patch conductors and each of the conductor posts are respectively connected by the wire-shaped conductor.

17. The surface communication device according to claim 7, wherein each of the patch conductors is disposed between the respective reference conductor and the electromagnetic wave propagation unit.

18. The surface communication device according to claim 17, wherein a dielectric constant of a space filling a layer respectively between each of the reference conductors and said each of the patch conductors is higher than a dielectric constant of at least one layer filling respectively between said each of the patch conductors and the surface of the electromagnetic wave propagation unit.

19. The surface communication device according to claim 7, wherein each of the reference conductors of the respective plurality of conductor unit structures are formed integrally together.

20. The surface communication device according to claim 19, wherein each of the patch conductors respectively adjacent to one another overlap one another when viewed from a side of the corresponding reference conductor.