Mitsumi Electric Company Ltd.

Other

Akira Yoneya

Yoshiaki Imano

Tsutomu Ito

Kazunari Saito

Akemi Kato

Hiroshi Suzuki

Junichi Noro

Noriyuki Kobayashi

Akira Miyoshi

Tomohiro Shinkawa

Isao Fukae

Satoshi Kohno

Nobuhiko Izuta

In an antenna unit including a dome-shaped top cover, an antenna module disposed in the top cover and adapted to receive radio waves, a bracket covering an under surface of the top cover, and a gasket disposed between the top cover and the bracket to thereby ensure hermeticity in the top cover, the bracket includes a bottom portion pressure welding the gasket between the bottom portion and the top cover to make inside of the top cover an enclosed space, and a mounting portion integrated to the bottom portion to enable the antenna unit to mount in a narrow-mounting-space cabinet.

Antenna unit housed in an outside mirror

An antenna apparatus includes: a circuit board that has a main surface and a rear surface opposite to each other; an antenna element that is formed of a metal plate and is arranged at a predetermined distance from the main surface of the circuit board; a plurality of legs that extend from the antenna element toward the circuit board; a ground conductor that is formed on the main surface or the rear surface of the circuit board; a feeding pin that supplies power from the circuit board to the antenna element; and a plurality of comb-shaped capacitor patterns that are formed on one of or both the main surface and the rear surface of the circuit board and are electrically connected between the plurality of legs and the ground conductor.

Antenna apparatus

A GPS receiving antenna device that can suitably be provided on the exterior of a vehicle is provided with low cost. An antenna case includes a top cover and a bottom plate joined with each other. The top cover stores an antenna module that receives a signal and a packing member provided at the joining part between the top cover and the bottom plate to keep the antenna case tightly sealed. The top cover and the bottom plate are provided with engagement parts and claw parts, respectively, and the top cover and the bottom plate are joined with each other as the packing member is pressed.

Antenna device

An antenna unit according to the present invention comprises an antenna case composed of a top cover and a bottom plate that are joined together. An antenna module is disposed in the top cover. A packing member is disposed at a joining portion between the top cover and the bottom plate to thereby ensure sealing of the antenna module. The packing member has a plurality of anti-slip projecting portions, while the bottom plate has a plurality of through holes receiving the plurality of projecting portions so as to pass therethrough. A diameter of the through hole is made greater than that of the projecting portion to thereby provide a clearance between the through hole and the projecting portion.

Easy-to-assemble antenna unit

Mounted on a back surface () of a circuit board (), a shield cover () has a substantially rectangular ceiling portion () with four corners which are chamfered, four side wall portions (-), and four corner portions (). The shield cover () is mounted on the back surface () of the circuit board by soldering at the four corner portions (). There is no gap between the four side wall portions (-) and the four corner portions (). The shield cover () is formed by bending working of a metal plate () and has extension portions () at both ends of the four corner portions () so as to interpose with the side wall portions (-).

Antenna unit having a shield cover with no gap between four side wall portions and four corner portions

An antenna device that can surely prevent water from coming into the part where the transmission table is introduced and allows the number of parts to be reduced so that the cost can be reduced. The antenna device includes an antenna module that receives radio waves transmitted from a satellite, a cover member having a sufficient internal space to store the antenna module and its bottom opened, and a bottom plate to close the open bottom of the cover member. The transmission cable is connected to the antenna module. The transmission cable is inserted from the hole provided at the cover member and sealed by a seal material including silicon resin in the hole. The bottom plate is made of a metal plate and a magnet plate and the magnet plate has projections to position the magnet. After the bottom plate is attached, a composite resin material is filled and the cover member has its bottom side sealed.

An antenna device that can suitably be provided on the exterior of a vehicle is provided with low cost. An antenna case includes a top cover and a bottom plate joined with each other. The top cover stores an antenna module that receives a signal and a packing member provided at the joining part between the top cover and the bottom plate to keep the antenna case tightly sealed. The antenna case has a notch positioned at the joining part through which a signal line is externally extended, and the packing member integrally forms a base part that covers the entire surface of the antenna module and a gasket part that covers the outer periphery of the signal line connected to the antenna module in the position of the notch.

An etching method and an etching apparatus for applying an etchant containing nitric acid and hydrofluoric acid to silicon to etch the silicon. The etchant used in etching is recovered, and brought into contact with a gas inert to the etchant, whereby the etchant is regenerated. At least a part of the regenerated etchant is reused in etching.

Growing community of inventors

Akita, Japan

Akira Yoneya