Antenna device and wireless communication apparatus

Patent metadata

Field	Value
Publication number	US-2022320743-A1
Application number	US-202017763861-A
Country	US
Kind code	A1
Filing date	Sep 28, 2020
Priority date	Oct 4, 2019
Publication date	Oct 6, 2022
Grant date	—

Abstract

An antenna device and a wireless communication apparatus capable of improving performance are provided. The antenna device includes a first antenna element and a second antenna element disposed on the side of one surface of the first antenna element. The first antenna element includes a first glass substrate and a first patch antenna provided on the first glass substrate. The second antenna element includes a second glass substrate and a second patch antenna provided on the second glass substrate. The shape of at least one of the first patch antenna and the second patch antenna in a plan view is a rectangle. Contours of one or more of four corners of the rectangle include a curved line or a plurality of obtuse angles in a plan view.

First claim

1 . An antenna device comprising: a first antenna element; and
a second antenna element disposed on the side of one surface of the first antenna element, wherein the first antenna element includes a first glass substrate, and a first patch antenna provided on the first glass substrate, and the second antenna element includes a second glass substrate, and a second patch antenna provided on the second glass substrate, wherein a shape of at least one of the first patch antenna and the second patch antenna in a plan view is a rectangle, and contours of one or more of four corners of the rectangle include a curved line or a plurality of obtuse angles in a plan view.

2 . The antenna device according to claim 1 , wherein the first antenna element includes
a first feeding point to connect to the first patch antenna, a shape of the first patch antenna in a plan view is a rectangle, and in a case where a straight line connecting centers of a pair of edges facing each other in a first direction is defined as a first straight line and a straight line connecting centers of a pair of edges facing each other in a second direction intersecting the first direction is defined as a second straight line in the rectangle, the first feeding point is located at a position separated from the first straight line and the second straight line.

3 . The antenna device according to claim 2 , wherein the first feeding point is separated from the first straight line and the second straight line by 0.05 mm or more.

4 . The antenna device according to claim 2 , further comprising a feeding transmission line connected to the first feeding point,
wherein the feeding transmission line includes a first wiring portion, and a second wiring portion connected in series to the first wiring portion and having a wiring width different from a wiring width of the first wiring portion.

5 . The antenna device according to claim 2 , wherein the first antenna element further includes
a second feeding point connected to the first patch antenna at a position separated from the first feeding point.

6 . The antenna device according to claim 5 , wherein the second feeding point is separated from the first straight line and the second straight line by 0.05 mm or more.

7 . The antenna device according to claim 5 , wherein the first feeding point and the second feeding point are connected to impedances having the same magnitude.

8 . The antenna device according to claim 1 , further including a metal plate provided on the same surface as the surface of the first glass substrate on which the first patch antenna is provided and disposed away from the first patch antenna, wherein the metal plate is fixed to an arbitrary potential.

9 . The antenna device according to claim 1 , wherein at least a part of the first patch antenna faces the second patch antenna through a cavity.

10 . The antenna device according to claim 9 , wherein the first glass substrate includes a first recess, as the cavity, provided on the side of the surface facing the second glass substrate, and
the first patch antenna is provided on the bottom surface of the first recess.

11 . The antenna device according to claim 10 , wherein a boundary between an inner surface of the first recess and a bottom surface of the first recess is rounded.

12 . The antenna device according to claim 9 , wherein the second glass substrate includes
a second recess, as the cavity, opened on the side of the surface facing the first glass substrate, and the second patch antenna is provided on the opposite side of a bottom surface of the second recess.

13 . The antenna device according to claim 12 , wherein the second glass substrate has protrusions provided on the bottom surface of the second recess.

14 . The antenna device according to claim 12 , wherein a boundary between an inner surface of the second recess and a bottom surface of the second recess is rounded.

15 . The antenna device according to claim 12 , comprising a plurality of second recesses, wherein an aspect ratio of the plurality of second recesses is 3 or more and 8 or less.

16 . The antenna device according to claim 1 , including a conductor layer provided on the opposite side of the first patch antenna with the first glass substrate interposed therebetween and fixed to an arbitrary potential.

17 . The antenna device according to claim 1 , wherein the first antenna element includes
a linear antenna provided on the first glass substrate.

18 . An antenna device comprising: a first antenna element; and
a second antenna element disposed on the side of one surface of the first antenna element, wherein the first antenna element includes a first glass substrate, and a first patch antenna provided on the first glass substrate, and the second antenna element includes a second glass substrate, and a second patch antenna provided on the second glass substrate, wherein the first antenna element includes a first feeding point to connect to the first patch antenna, a shape of the first patch antenna in a plan view is a rectangle, and in a case where a straight line connecting centers of a pair of edges facing each other in a first direction is defined as a first straight line and a straight line connecting centers of a pair of edges facing each other in a second direction intersecting the first direction is defined as a second straight line in the rectangle, the first feeding point is located at a position separated from the first straight line and the second straight line.

19 . A wireless communication apparatus comprising an antenna device; and
a wireless communication circuit connected to the antenna device, wherein the antenna device includes a first antenna element, and a second antenna element disposed on the side of one surface of the first antenna element, wherein the first antenna element includes a first glass substrate, and a first patch antenna provided on the first glass substrate, and the second antenna element includes a second glass substrate, and a second patch antenna provided on the second glass substrate, wherein a shape of at least one of the first patch antenna and the second patch antenna in a plan view is a rectangle, and contours of one or more of four corners of the rectangle include a curved line or a plurality of obtuse angles in a plan view.

Assignees

• Sony Semiconductor Solutions Corp

Inventors

• Igarashi Takahiro

Classifications

• H01Q5/35

  using two or more simultaneously fed points · CPC title

• H01Q9/0414 Primary

  in a stacked or folded configuration · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q21/24

  Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)} · CPC title

• H01Q13/08 Primary

  Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines · CPC title