[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
Half-wavelength dipole antenna
Animation of electromagnetic field radiated from the half-wavelength dipole antenna
(Method of Moments analysis)
1.5-wavelength antenna
Animation of electromagnetic field radiated from the 1.5-wavelength 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 half-infinite ground plane
Animation of diffraction by a half-infinite 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
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)

8. Antenna and Propagation

Gain of Aperture Antennas
Friis Transmission Equation
Radar Range Equation
Thermal Noise Level
Array Antennas

9. Signal Processing of Measured Field

10. Others


Copyright(c) 2001 Takuichi Hirano, All rights reserved.

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