Electronic apparatus with antennas

• US 7,557,762 B2
• Filed: 05/06/2008
• Issued: 07/07/2009
• Est. Priority Date: 05/10/2007
• Status: Active Grant

• Current Assignee: Toshiba Client Solutions CO., Ltd. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Shimasaki, Hiroshi, Teshima, Masao
• Primary Examiner(s): Ho; Tan
• Application Number:
  US12/115,876
• Publication Number:
  US 20080278384A1
• Time in Patent Office: 427 Days
• Field of Search: 343/700.MS, 343/702, 343/846, 361/679.55, 455/90.3
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/2266 disposed inside the computer
• CPC Class Codes: H01Q 13/10 Resonant slot antennas

Abstract

According to one embodiment, an electronic apparatus includes a housing in which an electrically conductive layer is formed on an inner surface of the housing, a flat-panel display which is accommodated in the housing, a first antenna which is disposed on the conductive layer, a part of the first antenna being located more on an outer peripheral side than a side of the conductive layer, and a second antenna which is disposed on the conductive layer, a part of the second antenna being located more on the outer peripheral side than the side of the conductive layer. The conductive layer includes a notch which is formed in a predetermined position of a side of the conductive layer, which is located between the first antenna and the second antenna, the notch having a length of ¼ of a wavelength corresponding to a resonance frequency of the first antenna.

Claims

1. An electronic apparatus comprising:

a housing in which an electrically conductive layer is formed on an inner surface of the housing;

a flat-panel display which is accommodated in the housing, with a back surface of the flat-panel display being opposed to the electrically conductive layer;

a first antenna which is disposed on the electrically conductive layer, a part of the first antenna being located more on an outer peripheral side than a side of the electrically conductive layer; and

a second antenna which is disposed on the electrically conductive layer, a part of the second antenna being located more on the outer peripheral side than the side of the electrically conductive layer,

wherein the electrically conductive layer includes a notch formed in a predetermined portion of a side of the electrically conductive layer, which is located between the first antenna and the second antenna, the notch having a length of ¼

of a wavelength corresponding to a resonance frequency of the first antenna.

2. The electronic apparatus according to claim 1, wherein the first antenna further has another resonance frequency, and

the electrically conductive layer further includes another notch which is formed in a predetermined position on the side, that is located between the first antenna and the second antenna, said another notch having a length of ¼

of a wavelength corresponding to said another resonance frequency of the first antenna.

3. The electronic apparatus according to claim 1, further comprising:

a first wireless communication module which is electrically connected to the first antenna and executes wireless communication by a first wireless communication scheme; and

a second wireless communication module which is electrically connected to the second antenna and executes wireless communication by a second wireless communication scheme.

4. The electronic apparatus according to claim 3, wherein a transmission power of the first wireless communication module is higher than a transmission power of the second wireless communication module.

5. The electronic apparatus according to claim 1, wherein a distance between the first antenna and the second antenna is an integer number of times of the length of ¼

of the wavelength which corresponds to the resonance frequency of the first antenna.

6. The electronic apparatus according to claim 1, wherein the electrically conductive layer is formed in a rectangular shape,

the first antenna and the second antenna are disposed on an upper side of the electrically conductive layer, and

the notch is formed in a predetermined position of the upper side, which is located between the first antenna and the second antenna.

7. The electronic apparatus according to claim 6, wherein the notch includes a first notch portion extending from the predetermined position on the upper side toward a lower side of the electrically conductive layer, and a second notch portion extending from an end of the first notch portion toward a lateral side of the electrically conductive layer.

8. The electronic apparatus according to claim 6, wherein the first antenna further has another resonance frequency, and

the electrically conductive layer further includes another notch which is formed in a predetermined position of the upper side, that is located between the first antenna and the second antenna, said another notch having a length of ¼

of a wavelength corresponding to said another resonance frequency of the first antenna.

9. The electronic apparatus according to claim 1, wherein the electrically conductive layer is formed in a rectangular shape,

the first antenna is disposed on a lateral side of the electrically conductive layer, and the second antenna is disposed on an upper side of the electrically conductive layer, and

the notch is formed in one of a predetermined position of the lateral side, which is located between the first antenna and the second antenna, and a predetermined position of the upper side, which is located between the first antenna and the second antenna.