Matsushita Electric Industrial Co., Ltd.

Keisuke Maruyama

Hiromi Tokunaga

Munenori Fujimura

Shuichiro Yamaguchi

Toshiharu Noguchi

Kazuhiro Eguchi

Futoshi Deguchi

Yoshitaka Mizoguchi

Kenichi Kozaki

Shigefumi Akagi

It is an object of the present invention to provide a radio communication medium processor having a stable performance that does not receive a limitation for an installed place, especially, the influence of a metallic structure, does not need to adjust the resonance frequency of an antenna or an impedance, is excellent in its convenience and extensibility upon installation and strong for unnecessary noise from a periphery. In electric current fed loop antenna units, non-electric current fed loop antenna are arranged in doughnut shapes outside the substantially same planes of electric current fed loop antennas so as to surround the electric current fed loop antennas. Thus, when non-electric current fed loop antenna units are installed linearly, in radial directions and in arrays adjacently to electric current fed loop antenna units, the influence of the non-electric current fed loop antenna units to the antenna characteristics of the electric current fed loop antenna units can be suppressed. When the non-electric current fed loop antenna units are extended and increased, the antennas of the electric current fed loop antenna units do not need to be adjusted.

Loop antenna unit and radio communication medium processor

The invention is to provide such an antenna module making broadband of transmitting and receiving frequencies, while realizing miniaturization. The invention has a structure comprising a mounting body; a chip antenna having a substrate mounted on the mounting body and a substrate and a couple of terminal parts provided on the substrate; an feeding portion to which one of the terminal parts provided on the mounting body is connected; a open portion to which the other of the terminal parts provided on the mounting body is connected; and a capacitive conductor provided in opposition to the substrate, thereby to make use of a bottom area hidden when mounting the chip antenna so as to increase capacitive components for realizing broadband of the antenna module.

Antenna module

An antenna apparatus includes a plurality of antennas having different resonance frequencies and a feeding section for supplying common power to feeding terminals of the plurality of antennas. Open terminals of the plurality of antennas are separate. As at least one of the plurality of antennas is implemented as a helical antenna having a helical conductor section trimmed, the transmission-reception band can be put into a wide band. Further, an antenna apparatus includes a plurality of antennas, a connection conductor provided between the antennas for connecting the antennas in series, a feeding section provided in one of terminal sections to which the connection conductor is not connected in the plurality of antennas connected in series, and an additional conductor provided in the other terminal section to which the connection conductor is not connected, wherein the additional conductor is an open end part.

Antenna module including a plurality of chip antennas

This invention provides an antenna module comprising: a helical antennaincluding a baseand a pair of terminalsand a helical area formed on the base; a power supplyfor supplying power to one of the pair of terminalsof the helical antenna; an opening connected to the other of the pair of terminals; an antenna substrateon which the antennais mounted; a grounding areaformed in the vicinity of the power supply; and a peripheral conductorformed at least a portion on the periphery of the antenna substrate, wherein the peripheral length of the peripheral conductorformed on the periphery of the antenna substrateis nearly integer times as long as &#xbc; wavelength of a resonance frequency.

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Koyu-gun, Japan

Keisuke Maruyama