류형록 | Engineering Portfolio · 전공 설계·실험

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Microstrip·정합·Wilkinson·Branch-line

이론 계산·기존 Cadence 결과 / 주파수·마커 조건별 비교

회로·파형·계산

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2026-07-29 RF Case Study 분리

하나의 긴 RF 페이지를 서로 다른 입력·목표·결과 경계를 가진 독립 사례로 분리했습니다.

  1. Homework 2 Microstrip: 3.5 GHz, 50 Ω, 270°, W=0.4814778 mm, L=24.96545 mm; archive marker는 3.7 GHz
  2. Homework 4 L-section: 1 GHz, 100 Ω, 200−j100 Ω, Cp=0.461 pF, Ls=19.5 nH
  3. Homework 4 Single-stub: two physical solutions; source load-normalization inconsistency 공개
  4. Homework 5 Wilkinson: 3.5 GHz, tuned W=270 µm, L=6.65 mm, R=94 Ω; archive S-parameter
  5. Homework 5 Branch-line: 35.35/50 Ω branches; numeric −90° phase validation은 미확인
  6. Ex. 12-3: source 폴더가 명시한 INCOMPLETE_WORK; 성공 결과로 전환하지 않음

Theory + Existing Cadence Archive · Source-Derived / Portfolio Redraw / Existing Result Archive

Microstrip design flow

Microstrip design flow

회로 범위

Alumina substrate 기반 microstrip, L-section·single-stub matching, Wilkinson divider, branch-line hybrid를 이론식과 기존 Cadence 결과로 비교했습니다.

Design Set

Network Source-derived design
50 Ω microstrip 3.5 GHz · 270° · W≈0.4815 mm · L≈24.97 mm
L-section 1 GHz · Cp 0.461 pF · Ls 19.5 nH
Single stub 3.66/3.15 mm · 8.61/13.44 mm
Wilkinson 70.7 Ω λ/4 theory · 100 Ω isolation
Branch-line hybrid 35.35 Ω / 50 Ω branches

Passive network map

Passive network map

Matching Interpretation