Suppression of current component using EBG structure

Patent metadata

Field	Value
Publication number	US-9258884-B2
Application number	US-201313886045-A
Country	US
Kind code	B2
Filing date	May 2, 2013
Priority date	May 17, 2012
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A structure member is mounted in a communication apparatus including a conductive housing incorporating a dielectric substrate on which a high-frequency circuit is mounted. The structure member includes a pass member which passes a harmonic current component of an operating frequency generated in the dielectric substrate when the high-frequency circuit operates, and a suppression member having an EBG structure which suppresses a predetermined current component of the operating frequency. The structure member is provided between the dielectric substrate and the conductive housing. The suppression member is disposed along a current path of a harmonic current component flowing in the pass member.

First claim

What is claimed is:

1. A structure member mounted in a communication apparatus including a conductive housing incorporating a dielectric substrate on which a high-frequency circuit is mounted, the structure member comprising:
a pass member which passes a harmonic current component of an operating frequency generated in said dielectric substrate when the high-frequency circuit operates; and
a suppression member having an EBG structure which suppresses a predetermined current component of the operating frequency,
wherein the structure member is provided between said dielectric substrate and said conductive housing, and
said suppression member is disposed along a current path of said harmonic current component flowing in said pass member.

2. The structure member according to claim 1 , wherein the structure member is provided between a GND portion of said dielectric substrate and said conductive housing.

3. The structure member according to claim 1 , wherein said pass member passes said harmonic current component of said operating frequency generated in a GND portion of said dielectric substrate when the high-frequency circuit operates.

4. The structure member according to claim 1 , wherein said pass member has a polyhedral structure.

5. The structure member according to claim 1 , wherein said suppression member suppresses a fundamental wave current component of said operating frequency generated in a GND portion of said dielectric substrate when the high-frequency circuit operates.

6. The structure member according to claim 1 , wherein said suppression member is disposed parallel to said current path.

7. The structure member according to claim 1 , wherein said pass member includes a low-impedance conductive member and has a plurality of flat surfaces.

8. The structure member according to claim 1 , wherein said pass member has a plurality of flat surfaces along the current path.

9. The structure member according to claim 1 , wherein said suppression member includes a dielectric base material on which a plurality of element arrays, each having said EBG structure, are arranged.

10. The structure member according to claim 9 , wherein said suppression member is disposed on at least one of a plurality of flat surfaces of said pass member.

11. The structure member according to claim 1 , wherein said suppression member includes a plurality of signal conductors, a plurality of conductive conductors conducting to said signal conductors, and a dielectric base material.

12. The structure member according to claim 11 , wherein at least one of the conductive conductors is disposed substantially perpendicular to a signal conductor surface of said signal conductor.

13. The structure member according to claim 11 , wherein said signal conductor and said conductive conductor are formed within the same plane.

14. The structure member according to claim 1 , wherein an antenna element is disposed on said dielectric substrate.

15. A communication apparatus comprising:
a conductive housing incorporating a dielectric substrate on which a high-frequency circuit is mounted; and
a structure member,
said structure member comprising
a pass member which passes a harmonic current component of an operating frequency generated in said dielectric substrate when the high-frequency circuit operates; and
a suppression member having an EBG structure which suppresses a predetermined current component of the operating frequency,
wherein the structure member is provided between said dielectric substrate and said conductive housing, and
said suppression member is disposed along a current path of said harmonic current component flowing in said pass member.

16. The apparatus according to claim 15 , wherein the structure member is provided between a GND portion of said dielectric substrate and said conductive housing.

17. The apparatus according to claim 15 , wherein said pass member passes said harmonic current component of said operating frequency generated in a GND portion of said dielectric substrate when the high-frequency circuit operates.

18. The apparatus according to claim 15 , wherein said pass member has a polyhedral structure.

19. The apparatus according to claim 15 , wherein said suppression member suppresses a fundamental wave current component of said operating frequency generated in a GND portion of said dielectric substrate when the high-frequency circuit operates.

20. The apparatus according to claim 15 , wherein said suppression member is disposed parallel to said current path.

21. The apparatus according to claim 15 , wherein said pass member includes a low-impedance conductive member and has a plurality of flat surfaces.

22. The apparatus according to claim 15 , wherein said pass member has a plurality of flat surfaces along the current path.

23. The apparatus according to claim 15 , wherein said suppression member includes a dielectric base material on which a plurality of element arrays, each having said EBG structure, are arranged.

24. The apparatus according to claim 23 , wherein said suppression member is disposed on at least one of a plurality of flat surfaces of said pass member.

25. The apparatus according to claim 15 , wherein said suppression member includes a plurality of signal conductors, a plurality of conductive conductors conducting to said signal conductors, and a dielectric base material.

26. The apparatus according to claim 25 , wherein at least one of the conductive conductors is disposed substantially perpendicular to a signal conductor surface of said signal conductor.

27. The apparatus according to claim 25 , wherein said signal conductor and said conductive conductor are formed within the same plane.

28. The apparatus according to claim 15 , wherein an antenna element is disposed on said dielectric substrate.

Assignees

• Canon Kk

Inventors

• Saito Katsuo

Classifications

• H01Q15/0093

  having a fractal shape · CPC title

• H01P1/00

  Auxiliary devices (coupling devices of the waveguide type H01P5/00) · CPC title

• H01Q15/0086 Primary

  said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials · CPC title

• H05K1/0236 Primary

  Electromagnetic band-gap structures · CPC title