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Antenna device

An antenna device, antenna pattern technology, applied in directions such as antennas, resonant antennas, antenna arrays, etc.

Inactive Publication Date: 2008-11-12
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] As described above, any of the antenna devices (substrate antennas) disclosed in Patent Documents 1 to 3 discloses only antenna devices including a substrate and antenna patterns (first transmitting and receiving patterns) formed on one (or both) surfaces of the substrate ( Substrate antenna), can only send and receive wireless signals (electric waves) in one (first) frequency band

Method used

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Examples

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Embodiment Construction

[0043] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0044] refer to figure 1 and figure 2 An antenna device (substrate antenna) 10 according to one embodiment of the present invention will be described. exist figure 1 Among them, (A) is a perspective view of the antenna device (substrate antenna) 10 viewed from the surface (top) side, and (B) is a perspective view of the antenna device (substrate antenna) 10 viewed from the rear (bottom surface) side. figure 2 It is a bottom view of the antenna device (substrate antenna) 10 .

[0045] The antenna device (substrate antenna) 10 has a substrate 12 having a first surface (surface, upper surface) 12u and a second surface (rear surface, bottom surface) 12d facing each other. The substrate 12 has a substantially cuboid (rectangular plate) shape having a length (vertical) B, a width (horizontal) W, and a thickness (height) T. In the illustrated example, the le...

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Abstract

An antenna unit (10) includes a board (2) having first and second surfaces (12u,12d) opposite to each other, a first antenna pattern (20), formed on the first surface (12u) of the board (12), for transmitting and receiving a first radio wave having a first frequency band, and a second antenna pattern (30), formed on the second surface (12d) of the board (12), for transmitting and receiving a second radio wave having a second frequency band different from the first frequency band. The first antenna pattern (20) and the second antenna pattern (30) are disposed so as to be opposed to each other through the board (12) and being disconnected from each other.

Description

technical field [0001] The present invention relates to an antenna device, and particularly to an antenna device used in a wireless LAN (Local Area Network) frequency band. Background technique [0002] In this technical field, it is well known that a wireless LAN refers to a LAN using a transmission path other than wired cables, such as radio waves or infrared rays. [0003] The standardization of the wireless LAN is established by the 802.11 committee of the American IEEE (Institute of Electrical and Electronics Technologies). That is, the IEEE 802.11 committee established standard specifications and descriptions of wireless LANs. [0004] For example, IEEE 802.11a is a standard for high-speed wireless LAN / wireless access in the 5 GHz band formulated by the IEEE 802.11 committee. The communication speed (transmission speed) is about 20M to 50M bits / second. As MAC (Media Access Control), CSMA / CD (carrier sense multiple access with collision detection) is adopted. The mo...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q9/04H01Q13/08H01Q21/00H01Q5/10H01Q5/385H01Q9/16H01Q21/30
CPCH01Q1/38H01Q5/0068H01Q1/36H01Q21/30H01Q9/26H01Q5/392H01Q1/2258
Inventor 三好明
Owner MITSUMI ELECTRIC CO LTD