Nippon Sheet Glass Company, Limited

Fujitsu Ten Limited

Ryokichi Doi

Hiroshi Iijima

Hitoshi Kakizawa

Tatsumi Tokuda

Eiichiro Kawasaki

Jun Hasegawa

Kazuo Takayama

Kouichi Chikaishi

Yoshinori Matsuoka

A rear glass according to the invention is for attachment to a lift-up backdoor that closes an opening in a rear portion of a vehicle, and includes a glass plate, a defogger disposed in a vicinity of a center of the glass plate in an up-down direction, and a shared antenna installed on the glass plate upward or downward of the defogger, the shared antenna including a power supply unit, an AM antenna connected to the power supply unit, and an FM antenna connected to the power supply unit, and a relationship between an element length Lof the AM antenna, a center wavelength &#x3bb;corresponding to a reception frequency band of the FM antenna and a wavelength shortening coefficient &#x3b1; of the glass plate satisfying 0.49&#xd7;&#x3b1;&#xd7;&#x3bb;&#x2264;L&#x2264;0.67&#xd7;&#x3b1;&#xd7;&#x3bb;.

Rear glass

A glass antenna with improved reception sensitivity was provided. A glass antenna formed on a surface of a window of a motor vehicle includes: an FM antenna element; and a heater that is capacitively coupled to the FM antenna element, and includes a plurality of heating wires, wherein a distance S between the FM antenna element and the heater is more than 40 mm.

Glass antenna

A heating line pattern structure is provided, in which the effect of the heating lines of a defogger on an antenna for a TV broadcast especially for a digital TV broadcast may be decreased. The defogger is structured by arranging heating lines between bus bars on both sides. The portion of an uppermost heating line in proximity to the monopole antenna are folded rectangularly at a regular interval to form a meander shape. One lateral heating line is extended under the meander-shaped heating line portion, and is connected to a vertical heating line to which four lateral heating lines are connected together.

Heating line pattern structure of defogger formed on rear window glass panel of motor vehicle and rear glass panel

A glass antenna for vehicles comprising a slot antenna constructed without using an electrical conductive transparent film is provided. A glass antenna for vehicles formed on a window glass for receiving a digital TV band comprises a rectangular slot antenna one side thereof is formed by an edge of a vehicle body surrounding the window glass and residual three sides are formed by a silver printed line formed on the window glass, both ends of the silver printed line being connected to the vehicle body by means of lead wires, respectively, and a feeder for supplying electric power to the slot antenna.

Glass antenna and glass antenna system for vehicles

A glass antenna system for vehicles to receive AM and FM bands is provided. An electrically conductive transparent film is formed on a side glass. A silver printed line have a wide width is formed around the electrically conductive transparent film. A loop-shaped silver printed line is provide surrounding the film, which is capacitively coupled to the body. In this manner, an opening is formed in a space between the silver printed line and the electrically conductive film. An electrically shorted portion is provided between the silver printed line and the electrically conductive film. A coaxial feeder for AM/FM is provided. A central conductor of the feeder is connected to the silver printed line and the outer conductor to the body.

Glass antenna system for vehicles

The invention provides a glass antenna device having a ground pattern, which has a stable antenna performance regardless of the position of a coaxial cable. The glass antenna device is mounted on a fixed window of a vehicle, and comprises an antenna including a radiation pattern and a ground pattern. The radiation pattern is connected to the inner conductor of a coaxial cable. The ground pattern is coupled capacitively with the vehicle, and further is connected to the outer conductor of the coaxial cable in at least two connecting portions.

Glass antenna device

A window glass antenna device disposed on an automobile window glass panel has a dedicated antenna disposed on the automobile window glass panel, a heater antenna comprising a defroster heater pattern disposed on the automobile window glass panel, and a feeder cable for transmitting received signals from the dedicated antenna and the heater antenna. An impedance transformer for effecting an impedance conversion between the dedicated antenna and the heater antenna, and the feeder cable has a primary winding having an end connected to the dedicated antenna, the primary winding having a tap connected to the heater antenna, and a secondary winding connected to the feeder cable.

Window glass antenna device

A glass antenna device for automobile telephone includes a glass panel and an antenna pattern mounted on the glass panel. The antenna pattern has a radiation pattern, a signal leader pattern having a first feeder positioned closely to an edge of the glass panel, and an extension extending from the first feeder toward and connected to the radiation pattern, a shield leader pattern having a surrounding pattern surrounding the first feeder and having a second feeder, and a pair of parallel extensions extending from the surrounding pattern parallel substantially the full length of the extension of the signal leader thereto and disposed one on each side thereof, and a rectangular ground pattern connected to an end of at least one of the parallel extensions of the shield leader pattern. Preferably, a feeder cable interconnecting the antenna pattern and an automobile telephone set mounted in an automobile has a portion extending toward the antenna pattern and including a ground conductor electrically connected to an automobile body of the automobile.

Glass antenna device for automobile telephone

A window glass antenna for use on an automobile rear window glass panel, for example has a radiating pattern to be mounted on the window glass panel a ground pattern to be mounted on the window glass panel in spaced relationship to the radiating pattern. The radiating pattern has a vertical length substantially equal to a quarter wavelength. The ground pattern has a vertical length substantially equal to a quarter wavelength and a horizontal width ranging from a half wavelength to a three-quarter wavelength.

Growing community of inventors

Minato-ku, Japan

Ryokichi Doi