동시스위칭노이즈 억제를 위한 나선형 EBG 구조와 개방 스터브가 적용된 전원면 설계

다국어 초록 (Multilingual Abstract)

In this paper, to suppress simultaneous switching noise (SSN) which becomes a major issue for designing a high speed digital system, the conventional methods including an uniplanar EBG power plane are investigated. And the characteristics and problems of previous techniques for SSN mitigation are also studied. To resolve their problems, a new open-stub technique and a new spiral-shaped structures are proposed.
First, the spiral-shaped power island which can effectively suppress SSN is proposed, when the power plane drives high-speed ICs on a small area. The proposed structure has a wide stopband bandwidth ranging from 0.15 GHz to more than 20 GHz. And when we design the high-speed digital system using the proposed power island, by placing the signal traces on the area outside the power island, we can avoid the SI problem and suppress the SSN effectively over the entire frequency band. Next, the proposed power island can be distributed periodically such as EBG structure to suppress the SSN on the entire power plane, if preventing the noise generation outside the power island is more important than the SI problem of the signal trace. The proposed EBG structure has a wider stopband than conventional EBG structures. Thus, the proposed spiral-shaped power island and EBG structure are expected to be effectively used in the high-speed digital system.
Second, the technique to greatly suppress the resonance peak in a noise stopband is proposed by utilizing a λ/4 open stub in a conventional periodic EBG power plane. The added λ/4 open stub makes an electrical short at the interested frequency and suppresses the noise signal. The modified EBG structure provides not only the more stable SSN suppression characteristic by eliminating noise peak at the specific frequency, but also the wider stopband than the conventional EBG structures.
To verify the performance of our proposed structures, extensive 3D EM simulations were performed using commercially available software and their results were presented. And the experimental results supporting the simulation data were also presented.

목차 (Table of Contents)

• 제 1 장 서론 1
• 제 1 절 동시스위칭노이즈 1
• 제 2 절 논문의 구성 4
• 제 2 장 기존의 동시스위칭노이즈 저감 기술 5
• 제 1 절 디커플링 캐패시터 6
• 제 2 절 Electromagnetic Bandgap(EBG) 구조 8
• 2.2.1 Mushroom-type EBG 구조 8
• 2.2.2 단층 EBG 전원면 13
• 제 3 절 Power island 16
• 2.3.1 EBG 단위셀을 이용한 power island 18
• 제 3 장 나선형 power island 21
• 제 1 절 등가회로 해석 21
• 3.1.1 구조 및 등가회로 21
• 3.1.2 등가회로 파라미터 추출 24
• 3.1.3 노이즈 저지대역 예측 30
• 제 2 절 제작 및 측정 결과 31
• 제 3 절 파라미터 변화에 따른 시뮬레이션 결과 35
• 3.3.1 Power island 사이의 거리 d의 변화 35
• 3.3.2 확장선의 회전수 T의 변화 36
• 3.3.3 기판 유전율 εr의 변화 38
• 3.3.4 전원면과 접지면 사이의 높이 h의 변화 39
• 제 4 절 신호무결성 확인 41
• 제 4 장 나선형 EBG 전원면 45
• 제 1 절 분포도를 이용한 주파수 예측 45
• 제 2 절 제작 및 측정 결과 49
• 제 5 장 개방 스터브를 사용한 노이즈 피크 억제 52
• 제 1 절 등가회로 52
• 제 2 절 제작 및 측정 결과 55
• 5.2.1 기본 사각형 EBG 전원면 55
• 5.2.2 L-bridge EBG 전원면 57
• 제 3 절 전원면의 표면 전류 분포 비교 60
• 제 6 장 EBG 전원면의 다층 PCB 구조 적용 62
• 제 7 장 결론 65
• 참고문헌 67
• ABSTRACT 71