Wireless module

Patent metadata

Field	Value
Publication number	US-9583817-B2
Application number	US-201414428666-A
Country	US
Kind code	B2
Filing date	Jun 10, 2014
Priority date	Jun 25, 2013
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A wireless device that suppresses deterioration of antenna characteristics and can be made thin is provided. The wireless device is provided with a substrate, a wireless module that is mounted on the substrate and has an antenna unit, and a casing that accommodates the substrate and the wireless module. The wireless device has a gap of a length that is an approximate multiple of a half-wavelength of a radio wave corresponding to a communication frequency of the antenna unit, from the antenna unit toward the casing.

First claim

The invention claimed is:

1. A wireless device comprising:
a substrate;
a wireless module that is mounted on the substrate and includes an antenna unit; and
a casing that accommodates the substrate and the wireless module and has a recessed section in a region that opposes the antenna unit,
wherein a distance between the antenna unit and the recessed section is a length that is an approximate multiple of a half-wavelength of a radio wave corresponding to the communication frequency of the antenna unit, and
a distance between the antenna unit and a first side surface of the recessed section that corresponds to a radiation direction of the radio wave is longer than a distance between the antenna unit and a second side surface of the recessed section that corresponds to a direction opposite to the radiation direction of the radio wave.

2. The wireless device according to claim 1 ,
wherein the casing includes an antenna-opposing region that opposes the antenna unit, and a non-antenna-opposing region that is a region other than the antenna-opposing region,
and the antenna-opposing region is formed from a material that has a lower relative permittivity, or a smaller dielectric loss tangent, than the non-antenna-opposing region.

3. The wireless device according to claim 1 , further comprising,
a first member provided between the antenna unit and the casing such that a gap is provided between the antenna unit and the first member, the gap having a length that is an approximate multiple of a half-wavelength of the radio wave.

4. The wireless device according to claim 1 , further comprising,
a first member provided between the antenna unit and the casing,
wherein a distance between the antenna unit and the first member is less than a half-wavelength of the radio wave, and the first member has an opening in a region, which opposes the antenna unit.

5. The wireless device according to claim 1 ,
wherein a distance between the antenna unit and a bottom surface of the recessed section is a length that is an approximate multiple of a half-wavelength of the radio wave.

6. The wireless device according to claim 1 ,
wherein a distance between the antenna unit and a side surface of the recessed section is a length that is an approximate multiple of a half-wavelength of the radio wave.

7. The wireless device according to claim 1 ,
wherein a bottom surface of the recessed section of the casing has a tapered surface that is substantially orthogonal to a radiation direction of the radio wave.

8. The wireless device according to claim 7 ,
wherein the antenna unit includes a plurality of antenna elements,
and a bottom surface of the recessed section of the casing has a tapered surface that is substantially orthogonal to a radiation direction of a radio wave from each of the antenna elements.

9. The wireless device according to claim 7 ,
wherein an outer peripheral surface of the casing has a tapered surface along the bottom surface of the recessed section.

10. A wireless device comprising:
a substrate;
a wireless module that is mounted on the substrate and includes an antenna unit; and
a casing that accommodates the substrate and the wireless module and has a recessed section in a region that opposes the antenna unit,
wherein a distance between the antenna unit and the recessed section is a length that is an approximate multiple of a half-wavelength of a radio wave corresponding to the communication frequency of the antenna unit, and
an area of a first side surface of the recessed section that corresponds to the radiation direction of the radio wave is larger than an area of a second side surface of the recessed section that corresponds to a direction opposite to the radiation direction of the radio wave.

11. The wireless device according to claim 10 ,
wherein the casing includes an antenna-opposing region that opposes the antenna unit, and a non-antenna-opposing region that is a region other than the antenna-opposing region,
and the antenna-opposing region is formed from a material that has a lower relative permittivity, or a smaller dielectric loss tangent, than the non-antenna-opposing region.

12. The wireless device according to claim 10 , further comprising,
a first member provided between the antenna unit and the casing such that a gap is provided between the antenna unit and the first member, the gap having a length that is an approximate multiple of a half-wavelength of the radio wave.

13. The wireless device according to claim 10 , further comprising,
a first member provided between the antenna unit and the casing,
wherein a distance between the antenna unit and the first member is less than a half-wavelength of the radio wave, and the first member has an opening in a region, which opposes the antenna unit.

14. The wireless device according to claim 10 ,
wherein a distance between the antenna unit and a bottom surface of the recessed section is a length that is an approximate multiple of a half-wavelength of the radio wave.

15. The wireless device according to claim 10 ,
wherein a distance between the antenna unit and a side surface of the recessed section is a length that is an approximate multiple of a half-wavelength of the radio wave.

16. The wireless device according to claim 10 ,
wherein a bottom surface of the recessed section of the casing has a tapered surface that is substantially orthogonal to a radiation direction of the radio wave.

17. The wireless device according to claim 16 ,
wherein the antenna unit includes a plurality of antenna elements,
and a bottom surface of the recessed section of the casing has a tapered surface that is substantially orthogonal to a radiation direction of a radio wave from each of the antenna elements.

18. The wireless device according to claim 16 ,
wherein an outer peripheral surface of the casing has a tapered surface along the bottom surface of the recessed section.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Watanabe Kentaro
• Kashino Yuichi
• Fujita Suguru
• Sugimoto Kohei
• Shiozaki Ryosuke

Classifications

• H10W74/15

  on active surfaces of flip-chip devices, e.g. underfills · CPC title

• H10W90/724

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H10W90/734

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H01Q1/273

  Adaptation for carrying or wearing by persons or animals · CPC title

• H01Q1/42

  Housings not intimately mechanically associated with radiating elements, e.g. radome · CPC title