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Antenna device and wireless communication device using same

An antenna device and antenna technology, applied in the direction of antenna support/installation device, antenna, loop antenna, etc., can solve the problem of antenna gain reduction and other problems

Inactive Publication Date: 2009-07-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the conventional small loop antenna exhibits good antenna gain characteristics when a conductor such as a metal plate or human body approaches the radio device or antenna, but there is a problem that the antenna gain decreases when the conductor moves away.

Method used

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  • Antenna device and wireless communication device using same
  • Antenna device and wireless communication device using same
  • Antenna device and wireless communication device using same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0114] figure 1 It is a perspective view showing the configuration of the antenna device 101 according to the first embodiment of the present invention. exist figure 1 Among them, the antenna device 101 according to the first embodiment is characterized in that it is configured to include: two antenna elements A1, A2 that are substantially linear and arranged in parallel to each other; Between, and relative to the antenna elements A1, A2 arranged in the vertical direction, a rectangular small loop antenna A3 with the number of windings N = 1.5; and a capacitor C1 inserted between the antenna element A1 and the feed point Q.

[0115] exist figure 1 In this case, a feeding point Q is provided at the longitudinal upper left edge end of the dielectric substrate 10 formed by forming the ground conductor 11 on the entire back surface, and the feeding point Q passes through the capacitor C1 that constitutes a series resonant circuit together with the inductance of the small loop an...

no. 2 Embodiment approach

[0133] figure 2 It is a perspective view showing the configuration of the antenna device 102 according to the second embodiment of the present invention. exist figure 2 Among them, the antenna device 102 according to the second embodiment is characterized in that compared with the antenna device 101 according to the first embodiment, the ring axis direction of the small loop antenna A3 is set to be parallel to the X direction, that is, the small loop antenna A3 is The loop plane of the antenna A3 is substantially arranged on the same plane as the two antenna elements A1 and A2. In the antenna device 102 constituted above, the ring axis direction of the small loop antenna A3 is parallel to the X direction. As described in detail, especially when separated from the metal plate 30, the small loop antenna A3 effectively operates as a current antenna and can Increase the antenna gain for vertical polarization (see Figure 14 ).

no. 3 Embodiment approach

[0135] image 3 It is a perspective view showing the configuration of the antenna device 103 according to the third embodiment of the present invention. exist image 3 Among them, the antenna device 103 according to the third embodiment is characterized in that, compared with the antenna device 101 according to the first embodiment, the small loop antenna A3 is arranged so that the small loop antenna A3 and the respective antenna elements A1, A2 The axis between the connection points is the center, so that the ring axis direction of the small loop antenna A3 is only inclined by a prescribed inclination angle θ (0<θ<90°) from the Z direction. The antenna device 103 configured as described above operates as a combination of the antenna device 101 and the antenna device 102 , and has the operating characteristics of the antenna device 101 and the operating characteristics of the antenna device 102 . Therefore, it is possible to obtain directional characteristics that make up fo...

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PUM

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Abstract

An antenna device (100-116) is configured to include a small loop antenna (A3) and at least one antenna element (A1, A2). The small loop antenna (A3) is designed to be electromagnetically adjacent to a dielectric substrate (10) having a ground conductor (11), to be wound with a prescribed number of windings N and to have a prescribed tiny length, on a fixed metal plate (30) close to the antenna device ( 100-116), it operates as a magnetic current antenna, and when the metal plate (30) is away from the antenna device (110-116), it operates as a current antenna. The antenna elements (A1, A2) are connected to the small loop antenna (A3), and operate as a current antenna. In the antenna device (100-116), one end thereof is connected to a feeding point (Q), and the other end thereof is connected to a ground conductor (11) of a dielectric substrate (10).

Description

technical field [0001] The present invention relates to an antenna device mainly used in a wireless communication device and including a loop antenna and a wireless communication device using the antenna device. Background technique [0002] Conventionally, loop antennas have been particularly used in portable wireless communication devices such as mobile phones, and their configurations are disclosed in, for example, the prior art literature "Society of Electronics, Information and Communications, 'Handbook of Antenna Engineering', pp.59-63, Ohm Corporation, pp. 1 Edition, Issued 30 October 1980". The overall length of the loop antenna is generally composed of about 1 wavelength. From the perspective of its current distribution, it can be approximated as a structure in which two half-wavelength dipole antennas (diploe antennas) are installed side by side as a directional characteristic antenna in the direction of the loop axis. And action. [0003] Here, if the loop anten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/24H01Q7/00H01Q1/24
Inventor 吉川嘉茂堀池良雄横网代义幸松本孝之
Owner PANASONIC CORP