Ntt Docomo, Inc.

Fuji Xerox Co., Ltd.

Toyo Seikan Kaisha, Ltd.

Renesas Electronics Corporation

Polaris Wireless, Inc.

Nippon Telegraph and Telephone Corporation

Bridgestone Corporation

Nec Electronics Corporation

Tohoku University

Yasuhiro Oda

Jiyun Shen

Tamami Maruyama

Ngoc Hao Tran

Tomoyuki Ohya

Kazuhiko Arai

Tatsuo Furuno

Masayasu Koyama

Muneki Yamada

Hidetoshi Kayama

Scot Douglas Gordon

Koichiro Yuasa

Tarun Kumar Bhattacharya

Masahiko Kubo

Yoshitsugu Maruhashi

Miho Ikeda

Akihisa Maruyama

Hassan Mohamed El-Sallabi

Kazuhiro Iwaoka

Kosei Takiishi

Takayuki Yamashita

Kazuhiko Yanagida

Shigeru Inaba

Taku Fukuhara

Masayo Higashimura

Masahito Kogure

Suk Kim

Hiroaki Kikuchi

Takahiro Asai

Katsumi Nukada

Hitoshi Yoshino

Takashi Kobayashi

Yasuhiro Uehara

Yasuo Yamamoto

Takatoshi Sugiyama

Taketoshi Hoshizaki

Ryosuke Takahashi

Takefumi Yamada

Yasuhiro Kusumoto

Yutaka Sugizaki

Nobuhiro Katsuta

Taichi Yamada

Daisuke Haruyama

Yuichi Fukuda

Masaki Nakamura

Tsutomu Iwasaki

Nobuyuki Nakayama

Ryuji Izumoto

Daisuke Nagao

Kunio Sawaya

Yuji Yamaguchi

Haruki Yokoyama

Qiang Chen

Nobuyuki Kato

Masanori Kobayashi

Kenji Kurishima

Qiaowei Yuan

Toshio Goryoda

Yuya Morita

Jianfeng Li

Kouzaburo Sakano

Junichi Oride

Isao Matsumura

Hassan Mohamed Ei-Sallabi

Shogo Mukuno

Masahiko Otsuki

Yoshitugu Maruhashi

Provided is a tire vulcanizing bladder comprising fluororubber, wherein a plurality of grooves extending in a width direction are formed on a circumference of an outer surface of the tire vulcanizing bladder, and a plurality of recesses connecting the grooves to each other are formed between the grooves. Also provided is a pneumatic tire comprising one or more fluorine-containing particles having a maximum diameter of 1.0 μm or more per area of 100 μmof a tire inner surface, wherein a plurality of bladder ridges extending in a tire width direction are formed on a circumference of the tire inner surface, and a plurality of protrusions connecting the bladder ridges to each other are formed between the bladder ridges.

Tire vulcanizing bladder and pneumatic tire

A disclosed dual antenna system includes a receiving antenna which includes a first surface orthogonal to an incident wave, the first surface being a first antenna aperture, and a transmitting antenna which includes a second surface parallel to a reflection direction which is a transmission direction, the second surface being a second antenna aperture. A portion of a structure of the transmitting antenna is shared by the receiving antenna.

Dual antenna system

A reflectarray reflects an incident wave in a desired direction, and the reflectarray includes a plurality of elements arranged in a first direction and in a second direction perpendicular to the first direction. The elements reflect the incident wave. A phase of a reflected wave by one element among the plurality of elements differs from a phase of the reflected wave by an element adjacent to the one element in the first direction by a predetermined value, and the phase of the reflected wave by the one element is equal to a phase of the reflected wave by an element adjacent to the one element in the second direction. Gap sizes between patches of a predetermined plural number of elements arranged in the first direction vary from a smallest value to a largest value. Here, an oblique TM incidence is utilized at a spurious resonance frequency.

Reflectarray

A method of designing a reflectarray including a substrate having a surface perpendicular to a predetermined axis, wherein elements are disposed on the substrate. The method obtains a reflection phase of the elements as a function of a design parameter such as element spacing, when a radio wave enters the arranged elements, and stores a relationship between the reflection phase and the design parameter in a memory. Here, the design parameter is equally set for the elements. The method repeatedly determines, for each of the elements, the design parameter of a specific element in accordance with the relationship. The function of the design parameter has a range of almost 360 degrees with respect to a range of the design parameter. The reflection phase is the continuous function of the element spacing such that two resonant points occur at which the reflection phase becomes zero.

Reflectarray and design method

A reflectarray having multiple elements arranged in an array, each element having a H-shaped patch provided in separation from a ground plate, the H-shaped patch formed by four outer vertices defined by two rectangular outer patches and four inner vertices defined by an inner patch. A length of the inner patch with respect to a first direction is determined to change the reflection phase of an electric field incoming in parallel to the first direction while keeping positions of the four outer vertices and sizes of the outer patches constant. The first direction is determined by positions of the four inner vertices, and a length of the H-shaped patch with respect to a second direction is determined to change the reflection phase of an electric field incoming in parallel to the second direction, wherein the second direction is determined by positions of the four outer vertices.

A reflectarray reflects an incident wave in a desired direction. The reflectarray includes a substrate including a surface which is perpendicular to a predetermined axis; and at least first and second element groups, wherein the first and second element groups are disposed on the substrate, and include elements that reflect a radio wave. The first element group and the second element group reflect the radio wave with corresponding reflection phases which are different from each other. The radio wave enters while forming an angle other than 0 degrees with respect to the predetermined axis. The elements included in the first element group reflect the radio wave with a first reflection phase, and the elements included in the second element group reflect the radio wave with a second reflection phase, wherein the second reflection phase is different from the first reflection phase.

A reflectarray reflects an incident wave in a desired direction. The reflectarray includes a substrate including a surface which is perpendicular to a predetermined axis, and elements disposed on the substrate. A specific element among the elements reflects the incident wave with a specific reflection phase among a plurality of reflection phases. Each of the elements has an element structure including, at least, a patch and a ground plate. Element spacing of first neighboring elements is different from element spacing of second neighboring elements, and a length of a gap between patches of the first neighboring elements is equal to a length of a gap between patches of the second neighboring elements.

A timing analysis device includes a storage unit and a processing unit. The processing unit performs storage processing and analysis processing. The storage processing stores circuit information of a circuit to be analyzed, timing constraint information defining timing constraints on the circuit, delay information defining a plurality of delay values associated with a plurality of cells constituting the circuit, and delay upper limit information including at least one delay upper limit for setting an upper limit to the plurality of delay values associated with the plurality of cells into a storage unit. The analysis processing generates a timing analysis result of a circuit to be analyzed, with delay value change processing that changes at least one of the plurality of delay values to the delay upper limit, using the changed delay upper limit in addition to the circuit information, the timing constraint information and the delay information.

Non-transitory computer readable medium storing timing analysis program, timing analysis device, and timing analysis method

A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflectarray which causes reflection and scattering in a different direction (&#x3b8;&#x2212;&#x3b7;)&#xb0; from a specular reflection direction &#x3b8;&#xb0; exists on a propagation path from a transmission point to a reception point RX of the radio wave, calculating a virtual reception point VRX by rotating the reception point RX about a rotation center point O, and estimating the propagation path by using the virtual reception point VRX.

Propagation path estimation method and program and apparatus using the same

A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflect array(structure) which causes reflection and scattering in a predetermined direction (&#x3b8;-&#x3b7;)&#xb0; different from a specular reflection direction &#x3b8;&#xb0; exists on a propagation path, rotating the reflect arrayby &#x3b7;/2&#xb0; about a rotation center O to set a virtual rotated reflect array(virtual structure), and estimating the propagation path by using the virtual rotated reflect array

A multi-beam reflectarray includes two or more element arrays including plural elements aligned along a predetermined direction. The multi-beam reflectarray is such that, in each of a first element group and a second element group included in at least one of the element arrays, a difference between phases of radio waves reflected by corresponding two elements is in proportion to a first product of a distance between the two elements and a value of a trigonometric function with respect to an angle of reflection by the two elements, and a distance between neighboring elements in the first element group is equal to a product of a rational number and a distance between neighboring elements in the second element group.

Multi-beam reflectarray

An image forming apparatus includes a rotatable photoconductor and a developing device that uses a developer that exhibits magnetism, the developing device including a housing having an opening for development at a position facing the photoconductor, and plural developing rollers that are exposed through the opening in the housing, that rotate without contacting a surface of the photoconductor, and that are arranged without contacting each other in a direction in which the surface of the photoconductor rotates, wherein a minimum distance between an inner surface portion extending to the opening of the housing of the developing device and one of the developing rollers arranged close to the inner surface portion and a minimum distance between the housing and the surface of the photoconductor are each equal to or larger than a minimum distance between the developing rollers.

Image forming apparatus

An apparatus having multiple mushroom structures is disclosed. Each of the multiple mushroom structures includes: a ground plate; a patch provided parallel to the ground plate with a separation of a distance to the ground plate, wherein a distance between a ground plate and a patch in a certain mushroom structure is different from a distance between a ground plate and a patch in a different mushroom structure.

Apparatus having mushroom structures

A semiconductor integrated circuit capable of testing power control operation in the semiconductor integrated circuit includes a power controllable region. Power control switches have switch series each constituted by a plurality of switch cells. A power controllable region includes output nodes in the switch series. The output nodes output power control signals that have passed through final stages of the respective switch series of the power control switches to outside the power controllable region. A chip on which the semiconductor integrated circuit is mounted has output terminals that output outputs of the output nodes to outside of the chip. When inserting a scan path test, observation flip-flops that load the outputs of the output nodes to data terminals, and load scan data to scan-in terminals are disposed in correspondence with the respective output nodes. Those observation flip-flops are connected to constitute a scan path chain.

Semiconductor integrated circuit including a power controllable region

An apparatus having multiple mushroom structures is disclosed. Each of the multiple mushroom structures including: a ground plate; a first patch provided parallel to the ground plate with a separation of a distance to the ground plate; and a second patch provided parallel to the ground plate with a separation of another distance to the ground plate, which another distance being different from the distance from the first patch to the ground plate, wherein the second patch is a passive element which is capacitatively coupled with at least the first patch.

Growing community of inventors

Kanagawa, Japan

Yasuhiro Oda