Electromagnetic waves (microwaves, millimeter waves, light waves) are used for applications such as signal transmission and sensing. These applications require controlling the propagation of electromagnetic waves depending on the purpose. Controlling the mode of electromagnetic waves that propagate through waveguides can realize the branching and coupling capabilities of electromagnetic power, as well as capabilities of frequency discrimination.
The instructor in this course will explain how the field distribution and propagation velocity of electromagnetic waves are determined when propagating in representative waveguides such as a coaxial line, metallic waveguide and dielectric waveguide. The instructor will also explain the scattering matrix used for characterizing electromagnetic wave circuits, then explain the operating principle and basic design methods of typical electromagnetic wave circuits for branching and coupling capabilities, frequency discrimination capability, and nonreciprocal functions that realize direction-dependent transmission of electromagnetic waves. Furthermore, the instructor will explain the concepts of the Radio Law.
By the end of this course, students should be able to:
1) Understand the characteristics of electromagnetic waves propagating in waveguides.
2) Represent the characteristics of electromagnetic wave circuits.
3) Explain and design the operation principles of representative electromagnetic wave circuits.
Corresponding educational goals are:
(1) Specialist skills Fundamental specialist skills
(4) Applied skills (inquisitive thinking and/or problem-finding skills) Organization and analysis
(7) Skills acquiring a wide range of expertise, and expanding it into more advanced and other specialized areas
microwave, millimeter-wave, lightwave, coaxial line, metallic waveguides, dielectric waveguide, voltage and current distributions along a transmission line, impedance, standing wave, cut-off, scattering matrix, impedance matching, resonator, multi-/demultiplexer, nonreciprocal device, the Radio Law
|Specialist skills||Intercultural skills||Communication skills||✔ Critical thinking skills||Practical and/or problem-solving skills|
|✔ ・Applied specialist skills on EEE|
Addition to each class, students should submit homework.
|Course schedule||Required learning|
|Class 1||Waveguides(Sec.2.1)Electromagnetic waves propagating in +z direction (Sec.1.4), Two-conductor waveguides(Sec.2.2, Sec.2.3)||Explain waveguides, electromagnetic waves propagating in +z direction, and two-conductor waveguides.|
|Class 2||Rectangular waveguide(Sec.2.4), Waveguide modes(Sec.1.6), Transmission loss(Sec.1.7)||Explain rectangular waveguide, waveguide modes, and transmission loss.|
|Class 3||Dielectric slab waveguide(Sec.2.5)||Explain dielectric slab waveguide.|
|Class 4||Report 1(to evaluate understanding level), 1-port elements(Sec.3.1), 2-port elements(Sec.3.2)||Evaluate understanding level on Classes 1-3. Explain 1-port elements and 2-port elements.|
|Class 5||3-port elements(Sec.3.3), 4-port elements(Sec.3.4)||Explain 3-port elements and 4-port elements.|
|Class 6||Mode conversion(Sec.3.5), Nonreciprocal elements(Sec.3.6)||Explain ｍode conversion and nonreciprocal elements.|
|Class 7||Report 2(to evaluate understanding level), The Radio Law and related act||Evaluate understanding level on Classes 4-6. Explain the concept of the radio law.|
To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.
J. Hirokawa, "Waveguide engineering"
Paperback, Design Egg Inc.
Amazon Kindle e-book
You can download course materials at T2SCHOLA.
M. Nakajima, "Microwave engineering," (Morikita Publishing), 1995, ISBN 978-462-771030-6
K.Sakakibara, M.Taromaru and K.Fujimori, "Wave transmission engineering," (Asakura shoten), 2019, ISBN978-4-254-22216-6
The instructor will evaluate your understanding of how the electromagnetic field distribution and propagation constant of guided modes are determined in waveguides, concepts of impedance and standing wave, and operation and design principles of waveguide circuits. Reports (to evaluate understand level) about 70%, Homework about 30%.
Students are requested to have passed Electricity and Magnetism I and II and Electromagnetic Fields and Waves.