Antenna, printed circuit board, and electronic device

Patent metadata

Field	Value
Publication number	US-2016276733-A1
Application number	US-201415032492-A
Country	US
Kind code	A1
Filing date	Jul 17, 2014
Priority date	Nov 5, 2013
Publication date	Sep 22, 2016
Grant date	—

Abstract

An antenna comprises: a conductor plane; an island-shaped conductor group which is arranged to face the conductor plane with a dielectric medium therebetween; at least one power feeding part which is connected to one island-shaped conductor of the island-shaped conductor group and transmits power; and a connection part which electrically connects the conductor plane and a first island-shaped conductor that is an island-shaped conductor located on the outermost side of the island-shaped conductor group. Each of island-shaped conductors is capacitively connected to another island-shaped conductor adjacent thereto, the power feeding part is connected at a position other than the center of the island-shaped conductor in the arrangement direction of the island-shaped conductor group, and the connection part is connected at a position inside the first island-shaped conductor by approximately half the width of a second island-shaped conductor, which is an island-shaped conductor located adjacent to the first island-shaped conductor, in the arrangement direction of the island-shaped conductor group from a portion facing the second island-shaped conductor of the edge of the first island-shaped conductor.

First claim

What is claimed is:

1 . An antenna comprising: including:
a conductor plane; an island-shaped conductor group including a plurality of island-shaped conductors arranged so as to face the conductor plane; at least one power feeding part that is connected to one of the plurality of island-shaped conductors of the island-shaped conductor group and that transmits power; and a connection part that electrically connects the conductor plane and a first island-shaped conductor that is the island-shaped conductor located on an outermost side of the island-shaped conductor group, wherein each of the plurality of the island-shaped conductors is capacitively connected to another island-shaped conductor or other island-shaped conductors adjacent thereto, the power feeding part is connected to a position other than a center of the island-shaped conductor in an arrangement direction of the island-shaped conductor group, and the connection part is connected to a position in the first island-shaped conductor by approximately half a width of a second island-shaped conductor, from a portion facing the second island-shaped conductor that is the island-shaped conductor located adjacent to the first island-shaped conductor, out of an edge of the first island-shaped conductor, in the arrangement direction of the island-shaped conductor group.

2 . The antenna according to claim 1 , wherein,
when an effective wavelength in a space between the conductor plane and the island-shaped conductor group of an electromagnetic wave transmitted or received by the antenna is designated as λ 0 , a size of the island-shaped conductor in the arrangement direction of the island-shaped conductor group is smaller than λ 0 /2.

3 . The antenna according to claim 1 , wherein
adjacent two of the island-shaped conductors are capacitively connected by being close to each other.

4 . The antenna according to claim 1 , wherein
in the island-shaped conductor group, adjacent two island-shaped conductors are capacitively connected via an auxiliary conductor disposed so as to partially overlap with each of the adjacent two island-shaped conductors in planar view.

5 . The antenna according to claim 1 , wherein
the connection part is a conductor via.

6 . The antenna according to claim 1 , wherein
the connection part is configured by cascadedly connecting a conductor via and any one of a chip capacitance, a third island-shaped conductor, and a transmission line, and electrically connects the conductor plane and the first island-shaped conductor.

7 . The antenna according to claim 1 , wherein
the plurality of island-shaped conductors included in the island-shaped conductor group is two-dimensionally arranged so as to face the conductor plane.

8 . The antenna according to claim 7 , wherein
at least two or more of the power feeding parts are included, at least one of the at least two or more of the power feeding parts is connected to a position other than a center of the island-shaped conductor in a first arrangement direction of the island-shaped conductor group, another of the at least two or more of the power feeding part is connected to a position other than a center of the island-shaped conductor in a second arrangement direction of the island-shaped conductor group, and a phase difference of power fed to the respective power feeding parts adjacent to each other in an outer circumferential direction of the island-shaped conductor group is greater than or equal to 60 degrees and smaller than 120 degrees.

9 . A printed circuit board including an antenna, wherein
the antenna comprises: a conductor plane; an island-shaped conductor group including a plurality of island-shaped conductors arranged so as to face the conductor plane via a dielectric medium; at least one power feeding part that is connected to one of the plurality of island-shaped conductors of the island-shaped conductor group and that transmits power; and a connection part that electrically connects the conductor plane and a first island-shaped conductor that is the island-shaped conductor located on an outermost side of the island-shaped conductor group, wherein each of the plurality of the island-shaped conductors is capacitively connected to another island-shaped conductor or other island-shaped conductors adjacent thereto, the power feeding part is connected to a position other than a center of the island-shaped conductor in an arrangement direction of the island-shaped conductor group, and the connection part is connected to a position in the first island-shaped conductor by approximately half a width of a second island-shaped conductor, from a portion facing the second island-shaped conductor that is the island-shaped conductor located adjacent to the first island-shaped conductor, out of an edge of the first island-shaped conductor, in the arrangement direction of the island-shaped conductor group.

10 . An electronic device including an antenna, wherein
the antenna comprises: a conductor plane; an island-shaped conductor group including a plurality of island-shaped conductors arranged so as to face the conductor plane via a dielectric medium; at least one power feeding part that is connected to one of the plurality of island-shaped conductors of the island-shaped conductor group and that transmits power; and a connection part that electrically connects the conductor plane and a first island-shaped conductor that is the island-shaped conductor located on an outermost side of the island-shaped conductor group, wherein each of the plurality of the island-shaped conductors is capacitively connected to another island-shaped conductor or other island-shaped conductors adjacent thereto, the power feeding part is connected to a position other than a center of the island-shaped conductor in an arrangement direction of the island-shaped conductor group, and the connection part is connected to a position in the first island-shaped conductor by approximately half a width of a second island-shaped conductor, from a portion facing the second island-shaped conductor that is the island-shaped conductor located adjacent to the first island-shaped conductor, out of an edge of the first island-shaped conductor, in the arrangement direction of the island-shaped conductor group.

Assignees

• Nec Corp

Inventors

• Kasahara Yoshiaki

Classifications

• H01Q19/005

  Patch antenna using one or more coplanar parasitic elements · CPC title

• H01Q21/065

  Patch antenna array · CPC title

• H01Q1/2216 Primary

  used in interrogator/reader equipment · CPC title

• H01Q9/0407

  Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40) · CPC title