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Antenna assembly

An antenna device and antenna element technology, which is applied to antennas, antenna arrays, resonant antennas, etc., can solve the problem of not getting gain

Inactive Publication Date: 2006-03-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional antenna device described above can obtain sufficient gain in all directions in the horizontal direction, but cannot obtain sufficient gain in the vertical direction or a direction inclined from the vertical direction.
Therefore, for example, when the conventional antenna is installed on the roof, there is a problem that it is difficult to maintain a good communication state with the communication terminal device at a lower position.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] figure 2 It is a perspective view showing the configuration of the antenna device according to Embodiment 1 of the present invention. In this figure, the dielectric substrate 101 is a square substrate having a dielectric constant εr, a thickness t, and a side length Wd.

[0035] The ground conductor 102 is provided in the -Z direction of the dielectric substrate 101 (see figure 2 The plane shown in the coordinate system) has the same shape as that of the dielectric substrate 101 .

[0036] The microstrip antenna element (hereinafter referred to as "MSA element") 103 is formed of a square copper foil with a side length Wp at the center of the surface of the dielectric substrate 101 in the +Z direction. The black dots in the figure indicate the position of the power supply point, which is set at a position that can match the impedance of the power supply line.

[0037] The monopole antennas 104 a to 104 d are copper wires with a diameter D and a length L, and are arr...

Embodiment approach 2

[0069] Image 6 It is a perspective view showing the configuration of the antenna device according to Embodiment 2 of the present invention. In this figure, the dielectric substrate 503 is a square substrate with a dielectric constant εr, a thickness t, and a side length Wd. A square cavity (hole) 502 with a side length Wh is formed in the center of the substrate.

[0070] The ground conductor 503 is provided on the surface of the dielectric base material 501 in the −Z direction, and has the same shape as the dielectric base material 501 .

[0071] The MSA element 504 is formed of a square copper foil whose side length is Wp, and a part having the same shape as the hollow portion 502 is cut off in the center of the copper foil. The MSA element 504 is provided on the surface of the dielectric substrate 501 in the +Z direction, and its cut-out portion is aligned with the cavity portion 502 . The black dots in the figure indicate the position of the power supply point, which is...

Embodiment approach 3

[0101] Figure 9 It is a perspective view showing the configuration of the antenna device according to Embodiment 3 of the present invention. However, Figure 9 and Image 6 The same part is given as with Image 6 The same symbols are used, and detailed descriptions thereof are omitted. Figure 9 and Image 6 The main difference is that the bipolar array adopts a 2-layer structure.

[0102] The base of the support 801 is fixed through the hollow portion 502, the support members 506a-506d are radially connected at a height of L / 2 from the base, and the support members 802a are radially connected at a height of 3L / 2. ~802d.

[0103] The support members 802a-802d are arranged parallel to the support members 506a-506d at an interval d2, and the front ends of each support member are respectively located at the vertices of a square whose side length is d1, and the front ends of the support members 802a-802d are connected to the dipoles. The centers of the antennas 803a to 803...

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PUM

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Abstract

The invention provides a antenna device, wherein a dielectric substrate (101) is a square substrate having a dielectric constant of [epsilon]r, a thickness of t and a length Wd of one side. A ground conductor (102) is provided on one side of the dielectric substrate (101) in a shape similar to that of the dielectric substrate (101). An MSA element (103) is formed of a square copper foil having a length Wp of one side in the center on the other side of the dielectric substrate (101). Monopole antennas (104a-104d) are copper wires having a diameter of D and a length of L and arranged, at a constant interval, on the diagonals of the MSA element (103) perpendicularly to the dielectric substrate (101). Power is fed selectively to whichever having a higher receiving power, the MSA element (103) or the monopole antennas (104a-104d). When the monopole antennas (104a-104d) are selected, phase and amplitude of each element are controlled. Consequently, a high gain is ensured in all directions over a hemispherical surface ranging from the horizontal direction to the vertical direction, resulting in an antenna assembly small in size and simple in arrangement.

Description

technical field [0001] The present invention relates to an antenna device corresponding to a microwave frequency band and a millimeter wave frequency band, such as an antenna device suitable for a fixed station device of a wireless LAN system. Background technique [0002] In recent years, a wireless LAN system connected via a communication terminal device such as a notebook computer and a wireless line has become popular. Since the wireless LAN system is assigned a high-frequency band such as the 5GHz band or the 25GHz band, the linearity of radio waves increases and it is difficult to ensure the transmission distance of radio waves. Therefore, in order to ensure a larger possible range of radio wave transmission for each fixed station device, an array antenna having directivity in any direction is proposed. As a conventional antenna device of this type, the invention disclosed in Patent Publication No. 2002-16427 is known. [0003] Figure 1A is a perspective view showin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/24H01Q21/29H01Q3/26H01Q9/18H01Q9/32H01Q13/08
CPCH01Q3/24H01Q21/293
Inventor 宇野博之斋藤裕太田现一郎春木宏志
Owner PANASONIC CORP