Microwave Engineering (초고주파공학) 2021-1학기

1. 공지사항

ㅇ Grading: 출석 10% (과제제출로 확인), 과제 20%, 중간시험 35%, 기말시험 35%

ㅇ Textbook:

- 원서: D. M. Pozar, Microwave Engineering, 4th Ed., Wiley, 2015.

- 번역서: 마이크로파공학 (D. M. Pozar 저), 고지환 역, 한티에듀, 2020.

ㅇ 과제용 학생고유번호 PIN: 학교에 등록된 자신의 이동전화 끝 4자리. . 단 각 숫자가 0인 경우 순차적으로 1, 2, 3, 4로 대체. 사용 예: 1C 전하로부터 PIN (m) 떨어진 점에서 전기장 세기 (V/m)를 구하라.

ㅇ 과제 제출: eCampus에 다음 주 수업일 자정까지

2. 주별 강의

01: Transmission Lines 1 (pdf, pptx-no-voice, pptx-voice, mp4)

02: Transmission Lines 2 (pdf, pptx-no-voce, pptx-voice, mp4)

복소수 계산기: 직각좌표/극좌표 형식 변환, 곱셈, 뺄셈

Python: complex_calc_1_python.txt

Fortran: complex_calc_1.f90, complex_calc_1.exe

03: Transmission Lines 3 (pdf, pptx-no-voice, pptx-voice, mp4)

04: Smith Chart (pdf, pptx-no-voice, pptx-voice, mp4)

05: Impedance Matching 1 (pdf, pptx-no-voice, pptx-voice, mp4)

06: Impedance Matchign 2 (pdf, pptx-no-voice, pptx-voice, mp4)

LC matching: Python souce code (06-python.txt)

07: Passive RLC Components 1 - Resistors (pdf, pptx-no-voice, pptx-voice, mp4)

08: Mid-term Exam. (prob, sol)

09: Passive RLC Components 2 - Capacitors (pdf, pptx-no-voice, pptx-voice, mp4)

10: Passive RLC Components 3 - Inductors (pdf, pptx-no-voice, pptx-voice, mp4)

11: Maxwell's Equations and Wave Equation (pdf, pptx-no-voice, pptx-voice, mp4)

12: Planewave 1 (pdf, pptx-no-voice, pptx-voice, mp4)

13: Planewave 2 (pdf, pptx-no-voice, pptx-voice, mp4)

14: 금주 강의없이 학생 자율적 기말고사 대비 문제풀이 시간입니다.

Solutions to problems in lectures 9 to 13

15: Final exam. (prob, sol) 시험시간 15:00-15:40. 답안은 eCampus 15주차 과제란에 제출

(Homework)

01: Due 2021-3-12-Fri 23:59

1. Express the characteristic impedance Z₀ of a transmission line in terms of R, L, G, and C.

2. Express the complex propagation constant γ of a transmission line in terms of R, L, G, and C.

3. Express Z₀ and γ of a lossless transmission line in terms of L and C.

4. Write down a Python program and execute it to find the characteristic impedance Z₀ and the complex propagation constant γ of a transmission line with R = 176 mΩ/m, L = 490 nH/m, G = 2 μS/m, C = 49 pF/m.

02: Due 2021-3-19-Fri 23:59

Z_L = PIN+j*3*PIN, Z0=PIN/3

1. Find Γ_L

2. Find VSWR.

3. Write down a Python program to calculate the reflection coefficient and the VSWR

Input: Z_in, Z₀

Output: |Γ_in| (dB), VSWR

03: Due 2021-3-26-Fri 23:59

PIN=pqrs, a = p+q+r+s, b = 3*a

Coaxial cable with a(given above), b(given above), ε_r = 2, tanδ = 0.001, σ = 5.8e7, f = 5.8 GHz

Write a Python code to find Z₀, γ, R, L, G, C, α_c (dB/m), α_d (dB/m), α (dB/m), λ_g.

04: Due 2021-4-2-Fri 23:59

Draw Smirth chart circles for r = 0, 0.5, 1, and 2.

05: Due 2021-4-9-Fri 23:59

1. Write down the conjugate matching condition for AC circuits.

2. Make a Python code for two-port power gain calculation and examplex on pages 15 and 19 of the lecture slide. Use z0 = zs = zL = 50 ohms for the example on p. 19.

06: Due 2021-4-16-Fri 23:59

1. Write down a Python code for calculating the characteristic impedance Z_T of a quarter-wave transformer that transforms a real impedance Z₁ to another real impedance Z₂.

2. Find all the possible element values of LC-matching networks that transforms 10+j40 Ω to 50 Ω. Use the Python code given in the lecture slide.

07: Due 2021-4-23-Fri 23:59

1. Make a Python code for the example on p.14 of the lecture slide. Calculate Z at log10(f) = 1 to 10 by 0.2 step.

08: Mid-term exam

09: Due 2021-5-7-Fri 23:59

1. Carry out the coding example on p. 24 of the lecture slide.

10: Due 2021-5-14-Fri 23:59

1. Carry out the coding example on p. 22 of the lecure slide.

11: Due 2021-5-21-Fri 23:59

1. Carry out the coding example on p. 17 of th electure slide.

12: Due 2021-5-28-Fri 23:59

1. Write down the attenuation contant of a planewave in a lossy medium.

13: Due 2021-6-4-Fri 23:59

1. Medium 1: air, Mediumk 2: earth, ε_r = 4. Find the intrinsic impedance of the air η₁ and of the earth η₂.

2. Find the reflection cofficient Γ and transmission coefficient τ of a planewave normally incident from the air to the earth.

14: Due 2021-6-11-Fri 23:59

1. Select a problem in Solutions to problems in lectures 9 to 13 and use your PIN to solve the selected problem. 과제용 학생고유번호 PIN: 학교에 등록된 자신의 이동전화 끝 4자리. 단 각 숫자가 0인 경우 순차적으로 1, 2, 3, 4로 대체

15: Final exam. No homework