(Homework 01)

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.

(Homework 02)

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

Coaxial cable with a(given above), b(given above), μ_r = 1, ε_r = 2, tanδ = 0.001, σ = 5.8e7 S/m, f = 5.8 GHz

Calculate Z₀, γ, R, L, G, C, α_c (dB/m), α_d (dB/m), α (dB/m), λ_g.

(참고) 다음 공식 사용

(Homework 03)

Visit http://mcalc.sourceforge.net/ to analyze a microstrip line.

다음과 같이 설정

단위를 mm 설정

Er = 4.3, Rho =1

H = 1, Rough = 0.0

Tmet = 0.035, Tanδ = 0.02

Keff는 ε_re (유효 유전상수)

선로파장:

Elec. Len. (degrees) = 선로의 전기적 길이를 각도로 표현. 1파장은 360°에 대응된다.

(문제)

W = 2mm, Frequency = 1500MHz 인 경우

Z0, Keff, L (1파장의 길이)를 구하라. 이 경우 Loss (dB)를 구하라.

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

Problem

(01)

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

1. Find Γ_L

2. Find VSWR.