This paper discusses system and technology aspects crucial to the development of satellite communications at Ka band (20–30 GHz) and beyond. It surveys the evolution of Ka band geostationary Earth orbit (GEO) satellite communications until the present stage of development of systems for direct-to-user (DTU) provision of interactive multimedia services worldwide. Then it discusses the attenuatio...

This paper presents the design and development of two element slot loaded rectangular microstrip array antenna for dual band operation. The dual bands are achieved at X and Ku band of frequencies. Effect of slots of different shapes embedded on the array elements is studied experimentally for enhancing the bandwidth. It is found that by using L-shape complementary slots on the array elements an...

1CyberScience Center, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan 2Graduate School of Engineering, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan 3 Institute of Development, Aging and Cancer, Tohoku University, Seiryo-machi 4-1, Aoba-ku, Sendai 980-8575, Japan 4Faculty of Mechanical Engineering, Czech Technical University in Prague, Technic...

NATURE PRECEDINGS | 23 FEBRUARY 2009 1 Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan, Precursory Research for Embryonic Science and Technology, Japan Science and Tech...

a Remote Sensing Environmental Monitor, Inc., 4-5-5, Kamariya-nishi, Kanazawaku, Yokohama, Kanagawa, 236-0046, Japan b Key Laboratory of Resources Remote Sensing & Digital Agriculture (Ministry of Agriculture); Institute of Agricultural Resources & Regional Planning, Chinese Academy of Agricultural Sciences, 12, Zhongguancun South Street, Haidian District, Beijing, 100081, PR China c Institute ...

Division of Life Science, Graduate School of Science and Engineering (K.K., Y.T., T.K.), Department of Biochemistry and Molecular Biology, Faculty of Science (Y.Y.), and Institute for Environmental Science and Technology (T.K.), Saitama University, Sakura-ku, Saitama 338–8570, Japan; Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, United Kingdom (T.Tr., P.D.); Department...

1 Department of Bioscience, Fukui Prefectural University, Eiheiji, Fukui 910–1195, Japan 2 Biological Science Laboratories, KAO Corporation, 2606 Akabane, Ichikai-machi, Haga-gun, Tochigi 321–3497, Japan 3 Department of Physics, Graduate School of Engineering, Yokohama National University, 79–5 Tokiwadai, Hodogaya-ku, Yokohama 240–8501, Japan 4 Department of Molecular Biology and Chemistry, Uni...

iDupartment of Nbetritional Scienca Ilaculty of Heatth and PVleijbre Sciencq Okayama Prefectural Uhiversity, Soja, Okayama Zl9-II9Z lapan 2Dqpartment of Chemisti:y, 1<yoto Uhiversity ofEducation, Fbeshimi-ku, 1<yoto 612-8522, Jdpan 3Research IhstituteforBioresourees, Okayama Uhiversity, Kberashiki. Okayama 710-O04a Jbpan "Graduate School of Health and PVeijbre Sciencq Okayama Prqfectttral Uhive...