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planar inverted-f antenna

A plane and antenna technology, applied in antennas, electrical short antennas, antenna parts and other directions, can solve the problem that the antenna is not implanted in the living body and cannot reduce the negative impact.

Inactive Publication Date: 2017-04-12
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these antennas have not been implanted in living bodies for use
Therefore, with the antennas described above, it is not possible to reduce the negative effects caused by the loss of electric waves in the living body, and these antennas are not suitable for use with communication devices implanted in the living body

Method used

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Embodiment Construction

[0018] A description of a planar inverted-F antenna (PIFA) according to various embodiments is provided below with reference to the accompanying drawings.

[0019] In each of the PIFAs described below, in order to match the impedance of the living body in which the PIFA is implanted with the impedance of the PIFA, the entire surface of the emitting electrode is covered with a dielectric material. In addition, in PIFA, in order to reduce the negative influence on the living body, the entire surface of the ground electrode is also covered with an insulator. In addition, since the emitter electrode is in an S-shaped form, it is possible to make the emitter electrode compact, thereby making the PIFA compact.

[0020] figure 1 is a transparent plan view illustrating the surface of a substrate in PIFA1 according to one embodiment, figure 2 is instantiated along figure 1 A cross-sectional side view of PIFA1 taken along line AA' in and viewed along the direction indicated by the a...

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Abstract

The planar inverted-F antenna includes a first substrate made of a dielectric material, a grounding electrode disposed on a first surface of the first substrate; an emitting electrode disposed to be opposite to the grounding electrode so as to sandwich the first substrate, wherein the emitting electrode has an S-shape, and has a short-circuiting point short-circuited to the grounding electrode at an edge portion thereof, and a feed point at which power is fed and which is located away from the short-circuiting point by a distance at which the characteristic impedance of the planar inverted-F antenna for electric waves with a certain design wavelength has a certain value; and a second substrate disposed to cover the entire emitting electrode together with the first substrate and made of a dielectric material.

Description

technical field [0001] The invention relates to, for example, planar inverted-F antennas suitable for implantation in living bodies. Background technique [0002] Recently, research and development are underway for a communication system for transmitting / receiving various types of information to / from a communication device implanted in a living body, such as a body area network. An antenna for a communication device implanted in a living body such as a human or animal body is preferably as compact and thin as possible. In the living body, the loss of radio waves is large. Therefore, an antenna for a communication device implanted in a living body is expected to be able to communicate with other communication devices even in a medium that causes a large electric wave loss such as a living body. [0003] In order to reduce the antenna size, antennas each equipped with a radiating electrode folded at one or more parts thereof have been proposed (see, for example, JP 2006-5059...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/27
CPCH01Q1/273H01Q1/40H01Q9/0421
Inventor 安德烈·S·安德连科
Owner FUJITSU LTD