Matsushita Electric Industrial Co., Ltd.

Hiromi Tokunaga

Munenori Fujimura

Shuichiro Yamaguchi

Kazuhiro Eguchi

Toshiharu Noguchi

Keisuke Maruyama

Hiroshi Kawano

Kenichi Kozaki

Shigefumi Akagi

Hitoshi Uchi

Takayuki Takeuchi

Yasuhiko Horio

Hiromitsu Taki

Takehiko Yoneda

Kengo Shiiba

Yoshitaka Mizoguchi

Takuya Fujimaru

An antenna element, an antenna module, and an electronic equipment using these, are small-sized, high in transmitting and receiving performance, and capable of transmitting and receiving electric waves at a plurality of frequencies. The antenna element includes two antennas having at least a feeder portion and an open portion, and current is fed to each feeder portion. The antenna module includes at least an antenna and a mounting body in which the antenna is mounted, and current is fed to each feeder portion. The electronic equipment includes at least the antenna element or antenna module, a signal modulator, a signal demodulator, a controller, a man-machine interface, and a casing.

Antenna element and antenna module, and electronic equipment using same

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.

A chip antenna includes a substrate, a plurality of helical conductors provided on the substrate, and a pair of terminals provided on the substrate. One of the plurality of helical conductors is connected electrically to one of the terminals, and another one of the helical conductors is connected electrically to the other terminal. Thus, the antenna is of a small size, yet is a single unit which alone is capable of transmitting and receiving electromagnetic waves of a plurality of frequencies.

Chip antenna

A non-reciprocal circuit device has a length, a width, and a thickness denoted respectively by LLand Land the overall dimensions of 2.5 mm&#x3c;L&#x3c;7.0 mm, 2.5 mm&#x3c;L&#x3c;7.0 mm, and 1.0 mm&#x3c;L&#x3c;3.5 mm. When a projected area of the substrate of the device is orthogonally projected on a plane parallel to a base surface of the substrate is denoted by S, the substrate holds a proportional relation to S/(L&#xd7;L)=0.1 to 0.78. When a thickness of the magnet of the device is denoted by Lthe magnet holds a proportional relation of L/L=0.2 to 0.5. When a projected area of the magnet orthogonally formed on a plane parallel to a surface of the magnet is denoted by Sthey have a proportional relation of S/S=0.15 to 0.83.

Non-reciprocal circuit device, method of manufacturing, and mobile communication apparatus using the same

A compact non-reciprocal circuit device capable of handling a high power without impairment of the characteristics. The non-reciprocal circuit device contains a magnetic substrate that exhibits anisotropic behavior by application of a direct-current magnetic field. On the surface of the substrate, strip-lines are disposed at an angle, being insulated with each other. One end of each strip-line is grounded, and the other end of each is connected through a capacitor to a ground. Of the ends connecting the capacitors, one end connects to a termination resistor; the remaining ends connect each to an input terminal and an output terminal. The non-reciprocal circuit device exhibits non-reciprocal characteristics between the input and output terminals. The case of the device contains an insulating thermal conductor that serves as a heat-radiator for the termination resistor and the strip-lines.

Non-reciprocal circuit device having a thermal conductor

A dielectric ceramic composition represented by the compositional formula: .sub.x BaO-.sub.y TiO.sub.2 -.sub.z Nd.sub.2 O.sub.3 -.sub.t Sm.sub.2 O.sub.3 -.sub.w Bi.sub.2 O.sub.3 so composed as to be in the molar fractions of 0.06.ltoreq.x.ltoreq.0.25, 0.60.ltoreq.y.ltoreq.0.80, 0.05.ltoreq.z.ltoreq.0.18, 0&lt;t.ltoreq.0.07 and 0&lt;w.ltoreq.0.05, provided that x+y+z+t+w=1, and a compositional range of Y&lt;0.68 and Z&gt;0.15 is excluded. As an additive, at least one of Al.sub.2 O.sub.3, ZrO.sub.2, etc. may be added. Part of Ba may be replaced with at least one of Sr, Ca and Mg. The Sm.sub.2 O.sub.3 and Nd.sub.2 O.sub.3 each may have a purity of at least 70 wt. %.

Growing community of inventors

Miyazaki, Japan

Hiromi Tokunaga