Antenna device and electrical appliance

Patent metadata

Field	Value
Publication number	US-11245184-B2
Application number	US-201816628635-A
Country	US
Kind code	B2
Filing date	Dec 25, 2018
Priority date	Apr 6, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An antenna device includes: a first conductor layer; a second conductor layer located opposite to the first conductor layer; and a third conductor layer located opposite to the second conductor layer. The first conductor layer includes: a feed element; a first grounding element located next to the feed element in a first direction and grounded; and a parasitic element located along the feed element and the first grounding element and insulated from the feed element and the first grounding element. The second conductor layer includes: a floating element located opposite to the feed element and insulated from the first conductor layer; and a second grounding element located opposite to the first grounding element and next to the floating element and grounded. The third conductor layer includes a third grounding element grounded.

First claim

The invention claimed is:

1. An antenna device, comprising:
a first conductor layer;
a second conductor layer that is located opposite to the first conductor layer;
a first dielectric layer that is located between the first conductor layer and the second conductor layer;
a third conductor layer that is located opposite to the second conductor layer; and
a second dielectric layer that is located between the second conductor layer and the third conductor layer,
wherein the first conductor layer includes:
a feed element to which power is supplied;
a first grounding element that is located next to the feed element in a first direction via a first gap and grounded; and
a parasitic element that is located along the feed element and the first grounding element and insulated from the feed element and the first grounding element,
the second conductor layer includes:
a floating element that is located opposite to the feed element and the parasitic element and insulated from the first conductor layer;
a second grounding element that is located opposite to the first grounding element and the parasitic element and next to the floating element in the first direction via a second gap, and grounded;
a first intermediate element that is located, in the second gap, opposite to the parasitic element and extends in a second direction that intersects the first direction; and
a second intermediate element that is located, in the second gap, next to the first intermediate element in the second direction via a third gap and extends in the second direction, and the third gap at least partially overlaps at least one of the feed element, the first grounding element, and the first gap in a plan view of the first conductor layer, and
the third conductor layer includes a third grounding element that is located opposite to the floating element and the second grounding element and grounded.

2. The antenna device according to claim 1 ,
wherein the floating element and the second grounding element form a shape that is asymmetric with respect to the second gap.

3. The antenna device according to claim 1 ,
wherein the first gap at least partially overlaps the second gap in a plan view of the first conductor layer.

4. The antenna device according to claim 1 ,
wherein the first intermediate element is connected to the second grounding element at an end further from the third gap, and
the second intermediate element is connected to the second grounding element at an end further from the third gap.

5. The antenna device according to claim 1 ,
wherein the second conductor layer further includes:
a third intermediate element that is located, between the first intermediate element and the floating element, opposite to the parasitic element and extends in the second direction; and
a fourth intermediate element that is located next to the third intermediate element in the second direction via a fourth gap and extends in the second direction, and
the fourth gap at least partially overlaps at least one of the feed element, the first grounding element, and the first gap in the plan view of the first conductor layer.

6. The antenna device according to claim 5 ,
wherein the third intermediate element is connected to the floating element at an end further from the fourth gap, and
the fourth intermediate element is connected to the floating element at an end further from the fourth gap.

7. The antenna device according to claim 1 ,
wherein the parasitic element at least partially overlaps the second gap in a plan view of the first conductor layer.

8. The antenna device according to claim 1 ,
wherein the parasitic element is longer in the first direction than a sum of lengths of the feed element, the first gap, and the first grounding element.

9. An electrical appliance that includes the antenna device according to claim 1 .

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Takai Hitoshi
• Hamabe Taichi
• Imai Kazuhiro

Classifications

• H01Q1/24

  with receiving set · CPC title

• H01Q9/16

  with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence) · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q1/525 Primary

  between emitting and receiving antennas · 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