Fujifilm Corporation

The University of Tokyo

Toppan Forms Co., Ltd.

Sharp Kabushiki Kaisha Corporation

Yuki Owashi

Yoshihisa Usami

Junichi Takeya

Hiroyuki Matsui

Takayoshi Yokoyama

Yasuhiro Sugita

Shinji Yamagishi

Jean Mugiraneza

Yoshitaka Kawanabe

Provided is an antenna device that performs the reading of information via near field wireless communication by using a plurality of antenna patterns, and that has no insensitive area on the touch surface. An antenna device that reads information via near field wireless communication includes an antenna layerthat includes a plurality of antenna patternstoarrayed in parallel with one another, wherein at least a part of the antenna patternstoare arranged so as to overlap with one another when the antenna layeris viewed in a plan view.

Antenna device

An information collection system includes a plurality of radio tags and a reading device. Each of the radio tags stores identification information and includes a sensor, an antenna that receives a carrier wave from the reading device, and a data transmission unit that sends measurement data including the identification information and information obtained by the sensor to the reading device after the carrier wave is received by the antenna. The plurality of radio tags send the identification information and the information obtained by the sensor with different natural periods from the data transmission units. The reading device transmits the carrier wave to each of the radio tags, receives data from each of the radio tags, and obtains the data.

Information collection system

A sensing system includes an electronic tag and a reading device that transmits and receives information to and from the electronic tag. The reading device includes a transmission unit that sends an alternating-current radio wave including a high-frequency component and a low-frequency component. The electronic tag does not include a power supply and includes a receiving unit that obtains a power supply voltage from the high-frequency component of the alternating-current radio wave and obtains a clock signal from the low-frequency component and a return unit that maintains a maximum amplitude of the clock signal and sends a combination of information and the clock signal as a return signal. The reading device further includes a processing unit that decodes the return signal sent from the electronic tag on the basis of the clock signal.

Sensing system

Growing community of inventors

Tokyo, Japan

Yuki Owashi