[Japanese/English]
Electromagnetic Theory
Takuichi Hirano, Japan
1. Polarization, standing wave, reflection and transmission
 Polarization

Animation of polarization
 Condition for a circularly polarized wave radiation by two linearly polarized waves (in Japanese)

Condition to realize a circularly polarized wave by two linearly polarized waves
 Standing wave

Animation of standing wave
 Reflectin and transmission

Reflection and transmission of a plane wave, reflection law (Fermart's principle),
refraction law (Snell's law), Fresnel's reflection and transmission coefficients, etc.
2. Radiation from the source
 Electric dipole
 Animation of electric force lines of electric dipole
 Small dipole antenna
 Animation of electromagnetic field radiated from the small dipole
 Halfwavelength dipole antenna
 Animation of electromagnetic field radiated from the halfwavelength dipole
antenna
(Method of Moments analysis)
 1.5wavelength antenna
 Animation of electromagnetic field radiated from the 1.5wavelength antenna
(Method of Moments analysis)
 Radiation Pattern of a Dipole Antenna As a Function of Dipole Length
 Current distribution is approximated by sine
 Electrostatic field and electromagnetic
field
 Comparison between electrostatic field and electromagnetic field

 Field Equivalence Theorem
(in Japanese)
 Field Equivalence Theorem

3. Diffraction
 Diffraction by a halfinfinite ground
plane
 Animation of diffraction by a halfinfinite ground plane (FDTD analysis)
 Diffraction by a slit
 Animation of diffraction by a slit (FDTD analysis)
 EM Scattering
 Scattering by a PEC cylinder, dielectric cylinder, parabolic reflector
and dielectric lens. (FDTD analysis)
4. Radiation from the small dipole (transient)
 Radiation from the small dipole (transient)

Animation of radiation from the small dipole (transient)
(FDTD analysis)
5. Modal Analysis
 Modal Analysis

Modal Analysis for waveguides
6. Microwave Circuits

Transmission lines

Dielectric loss

Skin depth and surface impedance of a conductor

Scatterers in a waveguide and its equivalent electric circuit model
 Mechanism of a choke and stub
7. Analysis Methods for Electromagnetics
 Method of Moments (MoM), Moment Method
 Spectral Domain Approach (SDA) (PDF)
 Finite Element Method (FEM)
 Finite Difference Time Domain (FDTD) Method
8. Antenna and Propagation
 Gain of Aperture Antennas
 Directivity and Half Power Beam Width (HPBW)
 Far Field Condition of Antenna
 Friis Transmission Equation
 Radar Range Equation
 Thermal Noise Level
 Shannon's Channel Capacity
 Array Antennas
9. Signal Processing of Measured Field
10. Others
Copyright(c) 2001Present Takuichi Hirano, All rights reserved.
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