Wyniki wyszukiwania dla: Hidenori Yukawa

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rozdział

A 3-D metal-direct-printed, low-cost, and light hexagonal waveguide Ka-band branch line coupler

Motomi Abe, Hidenori Yukawa, Yu Ushijima, Takuma Nishimura, więcej

2017 47th European Microwave Conference (EuMC) > 188 - 191

2017 47th European Microwave Conference (EuMC)

A hexagonal waveguide branch line coupler suitable for manufacture by a 3-D printer is proposed in this study, and its design method is elucidated. The Ka-band coupler manufactured by a 3-D printer exhibits characteristics similar to those of a machined coupler, but its weight and cost is reduced by 40% and 66% respectively. Its effectiveness is also confirmed in this study.

rozdział

Dual band rectangular waveguide polarizer using corrugated/elongated conductive plates for Ka-band

Yu Ushijima, Hidenori Yukawa, Naofumi Yoneda, Moriyasu Miyazaki

2017 47th European Microwave Conference (EuMC) > 520 - 523

2017 47th European Microwave Conference (EuMC)

This paper presents a novel rectangular waveguide polarizer for Ka-band. The polarizer consists of corrugated waveguide with an elongated conductive plate in the axial direction. The combination of the corrugated and elongated conductive plates increases the phase difference, and decreases frequency deviation in wideband. Thus, low axial ratio and a short length are achieved. Analysis and measurements...

rozdział

A metal 3D-printed T-junction OMT with an offset stepped post

Hidenori Yukawa, Yu Ushijima, Motomi Abe, Naofumi Yoneda, więcej

2017 47th European Microwave Conference (EuMC) > 444 - 447

2017 47th European Microwave Conference (EuMC)

We propose a T-junction OMT consists of an offset stepped post. The offset stepped post contributes to the matching of two rectangular ports at the short circuit situated at opposed side walls. The structure without conventional ridges is simple and makes it possible to achieve robust performances. We fabricated a proposed T-junction OMT in a single piece of an aluminum alloy, using a commercial metal...

rozdział

Waveguide loop-type directional coupler using a coupling conductor with protuberances

Hidenori Ishibashi, Manabu Kurihara, Yukihiro Tahara, Hidenori Yukawa, więcej

2015 European Microwave Conference (EuMC) > 1026 - 1029

2015 European Microwave Conference (EuMC 2015)

The waveguide loop-type directional coupler is mainly used as a power monitor of the waveguide circuits. It consists of a rectangular waveguide as a main line and a coaxial line as a coupled line. The coaxial line is coupled with the rectangular waveguide through a coupling hole which is smaller than quarter-wavelength. Therefore the waveguide loop-type directional coupler degrades the coupling deviation...

rozdział

A stripline power divider with insensitive to resistance variations using a parallel resistor pair

Akimichi Hirota, Yukihiro Tahara, Hidenori Yukawa, Tetsu Owada, więcej

2014 IEEE MTT-S International Microwave Symposium (IMS2014) > 1 - 3

2014 IEEE/MTT-S International Microwave Symposium - MTT 2014

The characteristics of a Wilkinson power divider frequently degrade when an isolation resistor in the Wilkinson power divider is formed by a resistance film because the resistance changes caused by manufacturing errors. In this paper, we present a stripline power divider that is insensitive to resistance variations, using a parallel resistor pair. In the proposed divider, two parallel resistors connected...

rozdział

Ku/Ka-band compact orthomode junction with low pass filters for high power applications

Hidenori Yukawa, Koji Yoshida, Tomohiro Mizuno, Tetsu Owada, więcej

2013 European Microwave Conference > 1175 - 1178

2013 European Microwave Conference (EuMC)

This paper presents a compact orthomode junction with low pass filters for high power applications. It consists of a circular waveguide step, a matching element for high frequency band and coupling sections straddle the circular waveguide step. These dimensions were optimized to achieve wideband performances and to support a high power rating. The structure without rectangular to circular transition...

rozdział

Modern plastic millimeter-wave array antennas

Satoshi Yamaguchi, Hidenori Yukawa, Tamotsu Nishino, Yoshihiko Konishi

2010 IEEE International Conference on Wireless Information Technology and Systems > 1 - 4

2010 IEEE International Conference on Wireless Information Technology and Systems (ICWITS 2010)

This paper presents two types of millimeter-wave waveguide-type array antennas using low-loss engineering plastics not only to reduce cost but also to obtain high performances. The first one is a post-wall slotted waveguide array antenna with an offset directional beam using a post-wall rectangular waveguide inside a Grafted Olefin-Styrene resin printed circuit board. The other is a Cyclo-Olefin Polymer...

rozdział

Millimeter-wave plastic waveguide phased array antenna

Yoshihiko Konishi, Tamotsu Nishino, Hidenori Yukawa, Yoji Aramaki

2010 IEEE Antennas and Propagation Society International Symposium > 1 - 4

2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting

This paper presents millimeter-wave waveguide-type phased array antennas using low-loss engineering plastics not only to reduce cost but also to obtain high performances with complex configurations. That is a Cyclo-Olefin Polymer (COP) waveguide horn array antenna which is fabricated by injection molding process.

rozdział

Q-band gaas MMIC modules for active phased array antenna systems

Hidenori Yukawa, Masatake Hangai, Hiroyuki Mizutani, Koji Yamanaka, więcej

2009 European Microwave Conference (EuMC) > 464 - 467

2009 39th European Microwave Conference (EuMC)

Q-band compact transmit/receive modules for active phased array antenna systems have been developed. The modules are comprised of a complete GaAs MMIC chip set including high power amplifiers, low noise amplifiers, mixers and phase shifters. The MMICs are integrated on low temperature co-fired ceramics packages that passive circuits are embedded in. Each module size is 25.6 mm × 54.4 mm × 3.9 mm....

artykuł

A Broadband Directional Coupler using Nonuniform-Coupled Transmission Lines with Uniform-Coupled end Sections

Hidenori Yukawa, Hideyuki Oh-hashi, Moriyasu Miyazaki

00028th European Microwave Conference, 01998 > 1998 > 2 > 678 - 683

28th European Microwave Conference, 1998

A compact broadband directional coupler has been developed using novel nonuniform-coupled transmission lines with uniform end sections. By using these coupled lines, both the coupled line spacing and the coupled line length can be reduced. A 50% size reduction and a broadband performance are achieved in the fabricated coupler.

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książka (9)
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WAVEGUIDE (4)
ANTENNA FEED (2)
ANTENNA PHASED ARRAYS (2)
ANTENNA RADIATION PATTERNS (2)
ARRAYS (2)
BROADBAND ANTENNAS (2)
EUROPE (2)
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INJECTION MOULDING (2)
METALS (2)
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RECTANGULAR WAVEGUIDES (2)
3-D PRINTER (1)
3D-PRINTER (1)
ACTIVE ANTENNA ARRAYS (1)
ACTIVE PHASED ARRAY ANTENNA SYSTEM (1)
ANTENNA ARRAYS (1)
ANTENNA FEEDS (1)
ANTENNA MEASUREMENTS (1)
BANDWIDTH (1)
BRANCH LINE COUPLER (1)
CERAMIC PACKAGING (1)
CIRCULAR POLARIZATION (1)
COAXIAL LINE (1)
CORRUGATE (1)
COUPLERS (1)
CYCLO OLEFIN POLYMER WAVEGUIDE (1)
CYCLO-OLEFIN POLYMER WAVEGUIDE (1)
DIRECT METAL LASER SINTERING (1)
DIRECTIONAL COUPLER (1)
DUAL BAND (1)
FILMS (1)
FREQUENCY 44 GHZ (1)
FREQUENCY 47 GHZ (1)
GAAS (1)
GALLIUM ARSENIDE (1)
GRAFTED OLEFIN-STYRENE RESIN (1)
HEXAGONAL WAVEGUIDE (1)
HIGH POWER AMPLIFIER (1)
HORN ANTENNA ARRAY (1)
HORN ARRAY ANTENNA (1)
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INJECTION MOLDING PROCESS (1)
KA-BAND (1)
LOSS MEASUREMENT (1)
LOW NOISE AMPLIFIER (1)
LOW TEMPERATURE CO-FIRED CERAMIC PACKAGE (1)
LOW-LOSS ENGINEERING PLASTICS (1)
MANUFACTURING (1)
MICROWAVE FILTERS (1)
MICROWAVE THEORY AND TECHNIQUES (1)
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POST-WALL RECTANGULAR WAVEGUIDE (1)
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Q-BAND GAAS MMIC CHIP SET (1)
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STRIPLINE (1)
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TRANSMIT MODULE (1)
WAVEGUIDE ANTENNA ARRAYS (1)
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WILKINSON POWER DIVIDER (1)
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