Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Tamio Kawaguchi"'
Publikováno v:
Journal of Applied Microbiology. 133:2966-2978
Aims To reduce Salmonella contamination of animal feeds, Salmonella contamination in a feed materials storage facility was investigated, and hazard analysis was performed to acquire the basic information necessary to establish a control method for Sa
Autor:
Tamio Kawaguchi
Publikováno v:
2022 Asia-Pacific Microwave Conference (APMC).
Autor:
Tamio Kawaguchi, Koji Akita, Daiki Yoda, Seifallah Jardak, Uchida Daisuke, Evgeny Tsimbalo, Makoto Sano, Magnus Sandell
Publikováno v:
IEEE Transactions on Wireless Communications. 20:5821-5830
This paper deals with IQ imbalance in wideband MIMO OFDM systems. In systems with a large bandwidth, the IQ imbalance will be frequency-dependent and hence cannot be described by a single parameter. Furthermore if there is a carrier-frequency offset
Publikováno v:
2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).
This paper demonstrates a cryogenic broadband GaAs pHEMT LNA MMIC. The LNA MMIC was designed by using modified GaAs pHEMT model, which includes the thermal characteristics of each device material. The MMIC was fabricated by using a commercial $0.25\m
Autor:
Makoto Sano, Tamio Kawaguchi, Evgeny Tsimbalo, Magnus Sandell, Koji Akita, Uchida Daisuke, Daiki Yoda, I. Seto, Seifallah Jardak
Publikováno v:
WCNC
Considerable research efforts have been made into 5G systems, in which wireless backhaul plays a key part. This paper presents a novel E-band testbed for 5G backhaul applications with wideband IQ imbalance compensation. It is based on OFDM to compens
Autor:
Makoto Sano, Tamio Kawaguchi, Seifallah Jardak, Koji Akita, Daiki Yoda, Magnus Sandell, Evgeny Tsimbalo, Uchida Daisuke
Publikováno v:
GLOBECOM
This paper deals with IQ imbalance in wideband MIMO OFDM systems. In systems with a large bandwidth, the IQ imbalance will be frequency-dependent and hence can not be described by a single parameter. Furthermore if there is a carrier-frequency offset
Publikováno v:
2019 IEEE Asia-Pacific Microwave Conference (APMC).
This paper presents a high-Tc superconducting (HTS) quad-band high-sensitivity receiver for a 20-m Cassegrain radio telescope. The developed receiver consists of an HTS quad-band filter, a cryogenic low-noise amplifier, and a high-reliability compact
Publikováno v:
2018 Asia-Pacific Microwave Conference (APMC).
We have proposed a new RF interface technology between cold stage and room temperature stage at X band. The RF interface has both low loss characteristic and low thermal insulating. In general, loss characteristic and thermal insulating is relationsh
Publikováno v:
2018 Asia-Pacific Microwave Conference (APMC).
We have developed a low-loss compact superconducting phase shifter for X-band applications. By cascading a discrete variable phase shifter and a continuous variable phase shifter, a total phase shift of 360 degrees was obtained. Both the discrete and
Publikováno v:
2018 13th European Microwave Integrated Circuits Conference (EuMIC).
We have developed an X-band low noise figure (NF) T/R switch-module using a superconducting T/R switch. The superconducting T/R switch was realized by combining a six-port network, two impedance transformers and two varactor diodes. The six-port netw