Array antenna

Patent metadata

Field	Value
Publication number	US-2016240934-A1
Application number	US-201614996090-A
Country	US
Kind code	A1
Filing date	Jan 14, 2016
Priority date	Feb 18, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

An array antenna includes: a feed line provided on a first surface of a substrate; a plurality of antenna elements that are provided on the first surface at predetermined gap along the feed line and that are electromagnetically coupled with the feed line; and a conductor plate that is provided on a second surface of the substrate different from the first surface and that is ground for the feed line and the plurality of antenna elements, the plurality of antenna elements including a first antenna element having a shape that resonates at a first frequency and a second antenna element having a shape that resonates at a second frequency different from the first frequency.

First claim

What is claimed is:

1 . An array antenna comprising:
a feed line that is provided on a first surface of a substrate; and a plurality of antenna elements that are provided on the first surface at predetermined gap along the feed line and that are electromagnetically coupled with the feed line, the plurality of antenna elements including: a first antenna element having a shape that resonates at a first frequency; and a second antenna element having a shape that resonates at a second frequency different from the first frequency.

2 . The array antenna according to claim 1 , wherein
the first frequency is a frequency of radio waves radiated by the plurality of antenna elements.

3 . The array antenna according to claim 1 , wherein
the first antenna element and the second antenna element are each shaped into a loop having a cutout part; and a radius of the first antenna element is different from that of the second antenna element.

4 . The array antenna according to claim 1 , wherein
the first antenna element and the second antenna element are each shaped into a loop having a cutout part; and a size of the cutout part of the first antenna element is different from that of the cutout part of the second antenna element.

5 . The array antenna according to claim 1 , wherein
the first antenna element and the second antenna element are each shaped into a loop having a cutout part; and a width of the first antenna element in a radius direction is different from that of the second antenna element in the radius direction.

6 . The array antenna according to claim 1 , wherein
the second antenna element is provided at a position at which an amount of radiation that is not more than 2% of a whole amount of radiation radiated from the plurality of antenna elements is required.

7 . The array antenna according to claim 1 , wherein
the plurality of antenna elements are provided so that the second antenna element is closer to a feeding point and the first antenna element is farther from the feeding point than the second antenna element.

8 . The array antenna according to claim 1 , wherein
the plurality of antenna elements further including a third antenna element having a shape that resonates at a third frequency different from the first frequency and the second frequency; the first frequency is a frequency between the second frequency and the third frequency; and an absolute value of a difference between the first frequency and the second frequency is substantially equal to that of a difference between the first frequency and the third frequency.

9 . The array antenna according to claim 8 , wherein
the second antenna element and the third antenna element are alternately provided along the feed line.

10 . The array antenna according to claim 8 , wherein
the number of second antenna elements is the same as the number of third antenna elements.

Assignees

• Panasonic Corp

Inventors

• Sato Junji
• Shiozaki Ryosuke

Classifications

• H01Q21/0075 Primary

  Stripline fed arrays (H01Q21/065 takes precedence) · CPC title

• H01Q21/30 Primary

  Combinations of separate antenna units operating in different wavebands and connected to a common feeder system · CPC title

• H01Q7/00

  Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop · CPC title

• H01Q21/065 Primary

  Patch antenna array · CPC title

• H01Q21/0037

  linear waveguide fed arrays · CPC title