Ykc Corporation

Casio Computer Co., Ltd.

The University of Electro-communications

Campus Create Co., Ltd.

Nec Corporation

Akira Saitou

Kazuhiko Honjo

Yutaka Aoki

Koichi Watanabe

Kenichi Kamijo

Ryo Ishikawa

Tomoharu Kiyuna

Kenji Okajima

Toshimasa Yamazaki

Hiroto Otsuka

Maki Ogura

Circular loop antenna elements of each of a transmitting antennaand a receiving antennahave different perimeters of approximately integral multiples of a wavelength determined from a wireless communication frequency. The transmitting antennaand the receiving antennainclude first circular loop antenna groupsA andA concentrically disposed on the same plane and second circular loop antenna groupsB andB including circular loop antenna elements of the same perimeter as that of a plurality of circular loop antenna elements of the first circular loop antenna group. An angular position of a terminal for connecting power supply units to circular loop antenna elements having the same perimeter is set to an angular position rotated by (2l+1)&#x3c0;/2m(where l is any integer, and mis a value of mto mthat are approximately integral multiples of a wavelength) in the first and second circular loop antenna groups.

Wireless communication apparatus and antenna device

A multi-frequency circularly polarized antenna () comprises a substrate and multi-frequency antennas (). The multi-frequency antennas () comprise antenna elements (), shunt-inductor conductors (), series-capacitor conductors (), series-inductor capacitors (), a center point () and input/output terminals (). The multi-frequency circularly polarized antenna () is constructed by connecting the shunt-inductor conductors () of the multi-frequency antennas () at the center point () in a substantially perpendicular manner.

Antenna

A multi-frequency antenna () comprises a dielectric substrate (), an antenna element (), a shunt inductor (), a capacitor conductor (), a series inductor (), a grounded part () and a feeding point (). The antenna element () is arranged on the substrate (), and is electrically connected to the grounded part () through the shunt inductor (). Moreover, the antenna element () is electrically connected to the feeding point () through a series capacitor formed by a part where the antenna element () faces the capacitor conductor () and the substrate () therebetween, and through the series inductor ().

Multi-frequency antenna

A miniature variable-beam microwave antenna () comprises antenna conductors (), an EBG conductor (), a variable reactance element (), and an adjusting part (). The EBG conductor () is connected to a grounded part () through the variable reactance element (). The adjusting part () changes the apparent reactance of the EBG conductor () by changing the capacity of the variable reactance element (). As the apparent reactance of the EBG conductor () changes, the directivity of the miniature variable-beam microwave antenna () also changes.

A pathological diagnosis support device, a pathological diagnosis support program, a pathological diagnosis support method, and a pathological diagnosis support system extract a pathological tissue for diagnosis from a pathological image and diagnose the pathological tissue. A tissue collected in a pathological inspection is stained using, for example, hematoxylin and eosin. In consideration of the state of the tissue in which a cell nucleus and its peripheral constituent items are stained in respective colors unique thereto, subimages such as a cell nucleus, a pore, cytoplasm, interstitium are extracted from the pathological image, and color information of the cell nucleus is also extracted. The subimages and the color information are stored as feature candidates so that presence or absence of a tumor and benignity or malignity of the tumor are determined.

Pathological diagnosis support device, program, method, and system

A balun in which the phase shift may be reduced significantly is disclosed. The balun has three lines, i.e. a first line b, a second line a and a third line c, arranged in parallel with the ground surface. The second line a and the third line c are arranged at the same height from the ground surface GC, the longitudinal length of each respective one of the first line b, second line a and third line c are specified to be equal to a quarter (&#xbc;) of the wavelength at the central frequency in the working band, and the capacitance Ca between the second line a and the ground surface GC is specified to be equal to the capacitance Cab between the second line a and the first line b. Furthermore, the distance hbetween the center of each respective one of the second line a and third line c in the height direction and the ground surface GC located closer to each respective one of the second line a and third line c is specified to be longer than the distance hbetween the center of the first line b in the height direction and the center of each respective one of the second line a and third line c in the height direction, or the permittivity of a dielectric Dis specified to be less than that of a dielectric D

Balun

One of the objects of this invention is to realize an antenna having low reflection loss over an extremely wideband. The antenna of the present invention is provided with a dielectric substrate, a plurality of antenna conductors formed on one surface of the dielectric substrate that are pseudo self-complementary on the surface, and a plurality of feed conductors symmetrical with respect to symmetrical surfaces of the antenna conductors, wherein a gap for a wavelength of 1/10 or less that of the wavelength of a usage frequency in a vacuum is provided at a center of rotational symmetry between the plurality of antenna conductors.

Ultra-wideband antenna and ultrahigh frequency circuit module

There is provided a bandpass filter for a differential signal applicable to a device having a wide passband, being a device for transmitting a signal using a differential signal. Respective linesandand linesandare provide on two surfaces Pand Pat an inner layer of a dielectric body. Each two lines are arranged symmetrically about the same plane of symmetry C, and the length of each line is a quarter wavelength at the center frequency of a used band. Reference numeralsandare input/output ends of the linesand, andandare input output ends of linesand. Opposite ends to the input output ends are open. If a differential signal is input to terminals, a differential output appears at the terminals. This device works as a bandpass filter.

Growing community of inventors

Machida, Japan

Akira Saitou