Array antenna device

Patent metadata

Field	Value
Publication number	US-2016248159-A1
Application number	US-201514975624-A
Country	US
Kind code	A1
Filing date	Dec 18, 2015
Priority date	Feb 24, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

An array antenna device of this disclosure includes a substrate, a strip conductor with a linear-shape, which is provided on the substrate, and a power feeder that feeds power to the strip conductor, and a plurality of loop elements, a conductor plate, and a plurality of feeding elements. The plurality of loop elements are provided on a first surface of the substrate, and are located along the strip conductor with a specified spacing from each other. Each of the plurality of loop elements has a loop-shape with a notch. The plurality of feeding elements are connected to the strip conductor, and each has a shape extending along a portion of an outer edge of corresponding one of the plurality of loop elements. The conductor plate is provided on a second surface of the substrate.

First claim

What is claimed is:

1 . An array antenna device comprising:
a substrate; a strip conductor with a linear-shape, which is provided on the substrate; a power feeder that feeds power to the strip conductor; a plurality of loop elements which are provided on a first surface of the substrate, and are located along the strip conductor with a specified spacing from each other, each of the plurality of loop elements having a loop-shape with a notch; a conductor plate provided on a second surface of the substrate, the second surface being an opposite surface of the first surface; and a plurality of feeding elements connected to the strip conductor, each of the plurality of feeding elements having a shape extending along a portion of an outer edge of corresponding one of the plurality of loop elements.

2 . The array antenna device according to claim 1 , wherein
the notch of each of the plurality of loop elements is provided in a 45-degree direction relative to a linear direction of the strip conductor.

3 . The array antenna device according to claim 1 , wherein
the plurality of loop elements are located to be point symmetry with respect to a central point of the strip conductor, and the plurality of feeding elements are located to be point symmetry with respect to the central point of the strip conductor.

4 . The array antenna device according to claim 1 , wherein
the strip conductor includes a termination element at a terminal end of the strip conductor.

5 . The array antenna device according to claim 4 , wherein
the termination element is another loop element.

6 . The array antenna device according to claim 1 , wherein
each of the plurality of feeding elements has a semicircular ring shape and is provided at an outside of an outer edge of corresponding one of the plurality of loop elements with a predetermined spacing from the corresponding one of the plurality of loop element.

7 . The array antenna device according to claim 1 , wherein
a spacing between each of the plurality of loop elements and corresponding one of the plurality of feeding elements is individually adjusted on a loop-element basis.

8 . The array antenna device according to claim 1 , wherein
each of the plurality of loop elements and corresponding one of the plurality of feeding elements are shaped to be line symmetry with respect to a straight line connecting a center of the notch and a center of respective loop element.

9 . The array antenna device according to claim 1 , wherein
each of the plurality of feeding elements is electromagnetically coupled with the strip conductor.

10 . The array antenna device according to claim 1 , wherein
the strip conductor is provided inside the substrate.

11 . The array antenna device according to claim 1 , wherein
the strip conductor is provided on the first surface of the substrate.

12 . The array antenna device according to claim 1 , wherein
the strip conductor is provided on the first surface of the substrate, and each of the plurality of feeding elements is directly connected to the strip conductor.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Shiozaki Ryosuke
• Kashino Yuichi
• Sato Junji

Classifications

• H01Q21/0075 Primary

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

• H01Q7/00 Primary

  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

• H01Q13/206

  Microstrip transmission line antennas · CPC title

• H01Q1/3233

  particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems · CPC title

• H01Q21/0006

  Particular feeding systems · CPC title