Periodic Ground Structure for C-PHY Signaling in Mobile Applications

다국어 초록 (Multilingual Abstract)

In this paper, we propose periodic slit ground structure (PSG) to improve the signal integrity of multilevel signals at high data rate such as MIPI C-PHY. Periodic slits are added in the upper and lower ground planes of the stripline structure, without adding additional layers or increasing area, to reduce crosstalk among neighboring lines. The proposed PSG structure can effectively improve the eye-diagram, especially eye height (EH) in multilevel signaling. The effectiveness of the proposed structure is validated through simulation and measurement of PCB-flexible printed circuit board (FPCB)-PCB structure that emulates the interconnected system of MIPI C-PHY signal transmission in a mobile system. The measurements from the test structures show that at a 2.5 Gsps data rate condition, the PSG structures show improvement in EH and eye width (EW) by 38.6% and 9.7%, respectively, compared to stripline structures. The proposed idea can be generally applied in PCB designs that will be used in high speed multilevel signal transmission to improve EH.

목차 (Table of Contents)

• Abstract
• I. INTRODUCTION
• II. PROPOSED PCB STRUCTURE
• III. FPCB STRUCTURE DESIGN
• IV. SIMULATION AND MEASUREMENT RESULTS
• V. CONCLUSIONS
• REFERENCES

참고문헌 (Reference)

1 S. Caniggia, "ignal Integrity and Radiated Emission" Wiley 355-407,

2 D. Lin, "Using Stepped-Impedance Lines for Common-Mode Noise Reduction on Bended Coupled Transmission Lines" 6 (6): 757-766, 2016

3 M. M. Bait-Suwailam, "Ultrawideband Mitigation of Simultaneous Switching Noise and EMI Reduction in High-Speed PCBs Using Complementary Split-Ring Resonators" 54 (54): 389-396, 2012

4 P. Lancheres, "The MIPI C-PHY Standard : A Generalized Multiconductor Signaling Scheme" 11 (11): 69-77, 2019

5 SangKeun Kwak, "Power Integrity and Shielding Effectiveness Modeling of Grid Structured Interconnects on PCBs" 대한전자공학회 12 (12): 320-330, 2012

6 Y. Han, "Pinwheel Meander-Perforated Plane Structure for Mitigating Power/Ground Noise in System-in-Package" 8 (8): 562-569, 2018

7 E. Song, "Modeling and Design Optimization of a Wideband Passive Equalizer on PCB Based on Near-End Crosstalk and Reflections for High-Speed Serial Data Transmission" 52 (52): 410-420, 2010

8 A. Kumar, "Microstrip filter with defected ground structure : A close perspective" 5 (5): 589-602, 2013

9 "MIPI C-PHY"

10 Y. Kim, "Glass Interposer Electromagnetic Bandgap Structure for Efficient Suppression of Power Ground Noise Coupling" 59 (59): 940-951, 2017

11 I. Chang, "Design of Defected Ground Structures for Harmonic Control of Active Microstrip Antennas" 2 : 852-855, 2002

12 A. Henridass, "Defective ground plane structure for broadband crosstalk reduction in PCBs" 1-5, 2012

13 M. Sindhaevi, "Crosstalk Reduction Using Defective Ground Plane Structures In RF Printed Circuit Boards" 39 (39): 1107-1116, 2014

14 ANSYS, "ANSYS Electronics Desktop"

15 S. Verma, "A novel miniaturized band stop filter using fractal type defected ground structure (DGS)" 799-802, 2017

16 J. H. Lee, "A Novel Meander Split Power/Ground Plane Reducing Crosstalk of Traces Crossing Over" 8 (8): 1041-, 2019

17 Seokwon Choi, "A MIPI Receiver Bridge Chip Supporting 5-Gb/s/lane D-PHY and 3-Gsymbol/s/lane C-PHY" 대한전자공학회 20 (20): 29-40, 2020

18 M. Kim, "A Compact EBG Structure With Wideband Power/Ground Noise Suppression Using Meander-Perforated Plane" 57 (57): 595-598, 2015

19 김상윤, "A 1.248 Gb/s – 2.918 Gb/s Low-Power Receiver for MIPI-DigRF M-PHY with a Fast Settling Fully Digital Frequency Detection Loop in 0.11 μm CMOS" 대한전자공학회 15 (15): 506-517, 2015

20 K. Hu, "A 0. 6 mW/Gb/s, 6. 4-7. 2 Gb/s Serial Gb/s Serial Link Receiver Using Local Injectionlocked Ring Oscillator in 90 nm CMOS" 45 (45): 899-908, 2010