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Biconical antenna

A technology of biconical antenna and truncated cone, which is applied to resonant antennas, mid-position feeding between antenna endpoints, and radiating element structures, etc. Give special records of dimensions and other issues

Inactive Publication Date: 2008-01-02
GLOBAL INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in terms of the size of the biconical antenna, for example, the length of the truncated conical bus bar of the biconical antenna described in Patent Document 2 is 25 cm, which is too large for the purpose of installing it on a notebook computer.
In addition, in Patent Document 1, there is no special description about the size
In addition, in Patent Document 2 in Patent Document 1, there is no description about miniaturizing a biconical antenna for use in a wireless interface of a computer.
For these prior art biconical antennas as disclosed in Patent Document 1 and Patent Document 2, it is difficult to use in a wireless interface of a computer from the aspect of size

Method used

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no. 1 approach

[0053] FIG. 1 is a cross-sectional view showing the structure of a biconical antenna 10a according to a first embodiment of the present invention. This biconical antenna 10a includes: a dielectric body 12a having two cavities 14a and 16a in the shape of a truncated cone, a cylindrical dielectric body 13a, a reflector 28a, a coaxial cable 34, a central conductor 30 of the coaxial cable, The shield conductor 32 of the coaxial cable, the connector 36, the power supply part 18a, the ground part 20a, and the ground reinforcing part 24a.

[0054] The power supply portion 18a is composed of a conductive film provided on the inner surface of a truncated conical cavity extending from the upper surface A of the cylindrical dielectric body 12a toward the center.

[0055] Likewise, the ground portion 20a is also composed of a conductive film provided on the inner surface of a truncated conical cavity extending from the lower surface B of the cylindrical dielectric body 12a toward the cent...

Embodiment 1

[0100] As shown in FIG. 12, Embodiment 1 gives the case where the power supply portion 112a and the ground portion 114a have the same truncated cone shape. The power supply part 112a and the ground part 114a have the same truncated conical shape, are coaxial with the gap 16a as the center, and are formed in opposite directions to form a symmetrical shape. The diameters of the bottoms B and B' of the truncated cone shape are both 15 mm, the diameters of the tops A and A' are both 2.4 mm, and the heights are also both 13 mm. The respective tops A and A' of the feeding portion 112a and the grounding portion 114a are parallel. The gap 106a is 1.5mm. The dielectric constant of the dielectric body 118 is 3.6.

[0101] The simulation results of the biconical antenna shown in FIG. 12 will be described.

[0102] 13 is a graph showing simulation results in the case of Example 1 of the biconical antenna of the second embodiment. In this simulation, the coaxial cable 124 is set to ter...

Embodiment 2

[0122] Example 2 is a case where the shapes of the power feeding part 112b and the ground part 114a are different.

[0123] FIG. 19 is a schematic structural diagram of a biconical antenna in which the heights of the power supply part 112b and the ground part 114a are different. The height of the truncated cone shape of the power feeding portion 112b is higher than the height of the truncated cone shape of the ground portion 114a. In addition, a reflective portion 130b is provided at the top A of the power feeding portion 112b. The reflection part 130b has a disk shape. The reflection part 130b has the function of smoothly removing high frequency frequencies. In addition, a configuration without the reflecting portion 130b may also be used. In addition, there is a ground reinforcing part 128b connected to the bottom B' of the ground part 114b. For example, the diameter of the bottom B' of the ground portion 114b is made the same as the diameter of the ground reinforcement ...

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Abstract

The invention relates to a biconical antenna, which is characterized in composed of a dielectric element provided with cavities in cone shapes at upper and lower faces of a cylinder body, respectively towards to the center of the cylinder body, while the top planes of the cavities are parallel and opposite with each other, a power supplier in cone shape composed of a conductive membrane on the inner surface of the upper cavity, and an earth portion in cone shape composed of a conductive membrane on the inner surface of the lower cavity. The invention fills the dielectric element between the power supplier and the earth portion to realize the miniaturization of biconical antenna.

Description

technical field [0001] The present invention relates to non-directional antennas for use in broadband. Background technique [0002] In recent years, UWB (Ultra Wideband, ultra-wideband) communication, which utilizes ultra-wideband, can coexist with existing wireless technologies, and can realize high-speed broadband wireless communication, has attracted widespread attention (Non-Patent Document 1, Non-Patent Document 2). UWB communication uses pulses with a width of only about 1 ns in a frequency band of 3.1 GHz to 10.6 GHz. In terms of frequency, it occupies a very wide frequency band with a width of several GHz, enabling high-speed communication. [0003] On the other hand, in UWB communication, the distance over which communication can be performed is short. Therefore, it is considered to be used in a wireless interface for data transmission between a computer and a peripheral device (see Non-Patent Document 3 and Non-Patent Document 4). [0004] Among the antennas us...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q9/28H01Q13/04
Inventor 武藤大助伊田省悟
Owner GLOBAL INFORMATION TECH
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