Numbering Code	U-ENG26 36109 LJ72	Year/Term	2022 ・ Second semester
Number of Credits	2	Course Type	Lecture
Target Year		Target Student
Language	Japanese	Day/Period	Mon.3
Instructor name	SHINOHARA NAOKI (Research Institute for Sustainable Humanosphere Professor) HASHIGUCHI HIROYUKI (Research Institute for Sustainable Humanosphere Professor)
Outline and Purpose of the Course	In this class we study basics of the radio wave and antennas. We first examine the nature of the electromagnetic wave based on the wave equation derived from the Maxwell's equations. We discuss the relation between the source current distribution and the radiated wave field in terms of various antenna parameters. We further study the wave propagation, such as refraction, reflection, scattering, and diffraction. We also derive the basics of guided wave transmission from the boundary conditions of the Maxwell's equations.
Course Goals	Understand the basic theory of the radio wave, and technology for its industrial applications.
Schedule and Contents	Nature of the radio wave,2-3times,We solve the Maxwell's equation in its simplest form to show that it gives the electromagnetic wave propagating in space. Basic nature of planar wave is examined including its reflection, transmission, velocity and polarization. Radiation and basics of antennas,4-5times,We derive the radiation field from the Maxwell's equation with sources, and study its characteristics in the near and far fields. We examine the radiation from short dipole and linear antennas in terms of important parameters such as the gain, impedance, frequency characteristics, and effective area. We also study principle, structure, and basic analysis methods of various realistic antennas such as array and aperture antennas. Radio wave propagation,2-3times,We study basic issues related to various types of the radio wave propagation including the ground wave, tropospheric and ionospheric propagation, and space communication. We also discuss diffraction and scattering of the radio waves. Guided wave transmission,4-5times,We first study basic ideas related to the guided wave transmission, such as the transmission line theory and the Smith chart. We then study individual elements including coaxial line, microstrip line, rectangular waveguide, and circular waveguide, mainly focusing on their propagation modes, transmission characteristics, and loss. The order of instruction for each topic and subtopic may vary, and the course instructors will organize the lectures as appropriate for the students. Students will be informed of the lecture plan (for all 15 lectures) in advance and will have sufficient time for preparation.
Evaluation Methods and Policy	Grading is based on the regular examination, but the rating of reports may be considered as well.
Course Requirements	Knowledge of Electromagnetic theory 2 is required. Modulation Theory in Electrical Communication is recommended.
Study outside of Class (preparation and review)	A student should read text book before/after class.
Textbooks	Textbooks/References	Denpa kogaku (radio engineering); 2nd Ed. (in Japanese), Hasebe Nozomu, (Corona publishing), ISBN:978-4-339-00773-2
References, etc.	Antenna theory, 2nd Ed., Balanis, (Wiley), ISBN:0471592684
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