A novel FSS-Backed reflectarray unit cell is introduced to design a dual-band X/Ku Reflectarray Antenna (RA). A Kuband RA based on this FSS-Backed cell element is designed and located on the top of a conventional X-band RA. Actually, the band-stop Frequency Selective Surface (FSS) property is applied to a wideband element to create isolation between X and Ku band RAs which utilizing the same ra...

AbstructThe space shuttle orbiter (SSO) Ku-band single access return (KSAR) link and the space station freedom (SSF) KSAR link' via the tracking and data relay satellite system (TDRSS) use the same carrier frequency. The interference between spacecraft is minimized by opposite antenna polarizations and by TDRSS antenna beam pointing, but if the SSF and SSO are in close proximity, it is expected...

We present dewar temperature and system temperature measurements for the eight cryogenically cooled receivers of a subset of four EVLA antennas that have undergone a reconfiguration to use three cryogenic compressors instead of four. We compare the changes in the system temperatures in these antennas with those obtained from a subset of eight other EVLA antennas that have not undergone such a r...

1 Graduate School of Mathematics, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan 2 Fachbereich Physik, Universität Duisburg-Essen, 45117 Essen, Germany 3 Institute of Physics, Saint-Petersburg University, 198504, Saint-Petersburg, Russia 4 Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, UK 5 Department of Physics, Graduate School of Science, Universi...

Katsumi Furuya , Takeyoshi Sugaya , Kazuhiro Komori , Masahiro Asada 3 1 Photonics Research Institute, AIST Central 2, 1-1-1 Umezono, Tsukuba-shi, Ibaraki 305-8568 Japan, [email protected] 2 CREST Type, Basic Research Programs, Japan Science and Technology Agency 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012 Japan 3 Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute...

We derive several interesting formulae for the eigenvalues of the derangement graph and use them to settle affirmatively a conjecture of Ku regarding the least eigenvalue.

1 Department of Surgery, Atumi Hospital, Tahara-cho, Atumi-gun, Aichi, Japan 2 Laboratory for Bioinformatics, Department of Ecological Engineering, Toyohashi University of Technology, Tempaku,Toyohashi, Aichi, Japan 3 Equipement Center for Research and Education, Nagoya University, Tsurumai-cho, Showa-ku, Nagoya, Aichi, Japan 4 Department of Biochemistry, Faculty of Pharmaceutical Sciences, sci...

∗Department of Mechanical Systems and Design, Tohoku University 6-6-01 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan E-mail: [email protected] ∗∗Department of Mechanical Engineering, Faculty of Science and Technology, Keio University 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan ∗∗∗Manufacturing Process Department, Faculty of Manufacturing Engineering, Universiti Teknikal Malay...