0883-6272/86 $3.00 + .00 Copyright © 1986 SUNS AT Energy Council INTRODUCTION Seven papers in this issue are the presentations given at the 1985 International Symposium on Antennas and Propagation (ISAP'85) held in Kyoto, Japan, August 20-22, 1985. The symposium, the third ISAP in Japan, was sponsored and organized by the Institute of Electronics and Communication Engineers of Japan, and was supported by the Antennas and Propagation Society of the Institute of Electrical and Electronics Engineers and the International Union of Radio Science (URSI). Two hundred and seventy papers from 27 countries were presented at 52 sessions. The seven papers were included in the session of Radio Energy Transmission which is regarded as one of frontier technology and systems that await active cooperation of antennas and propagation engineers. Also, this session was closely related to the theme of the Symposium: A step to new radio frontiers. Three papers in the session, all of which were contributed from Japan, concern Solar Power Satellite, and four papers consisting of three from Japan and one from the USA concern Fusion Plasma Heating. A program of the session is as follows: 1. Nonlinear Interaction of Strong Microwave Beam with the Ionosphere — MINIX Rocket Experiment N. Kaya, Kobe University, Kobe, Japan; H. Matsumoto, RASC, Kyoto University, Kyoto, Japan; S. Miyatake, University of Electro-Communications, Tokyo, Japan; I. Kimura, Kyoto University, Kyoto, Japan; M. Nagatomo, T. Obayashi, Institute of Space and Astronautical Science, Tokyo, Japan. 2. Nonlinear Excitation of Electron Cyclotron Waves by a Monochromatic Strong Microwave — Computer Stimulation Analysis of the MINIX Results H. Matsumoto, T. Kimura, RASC, Kyoto University, Kyoto, Japan. 3. Rectenna Composed of a Circular Microstrip Antenna K. Itoh, T. Ohgane, Y. Ogawa, Hokkaido University, Sapporo, Japan. 4. Analysis of Aperture Antenna Attached to Cutoff Cavity for ICRF Plasma Heating K. Sawaya, S. Adachi, Tohoku University, Sendai, Japan. 5. A Ridged Waveguide Slotted Coupler for Large Tokamaks H. Arai, N. Goto, Tokyo Institute of Technology, Tokyo, Japan. 6. Reflector Antennas for Electron Cyclotron Resonance Heating of Fusion Plasma O. Wada, M. Nakajima, Kyoto University, Kyoto, Japan.
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