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Kayano Lab
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The lab is an EMC lab that clarifies, from the fundamentals, how unwanted electromagnetic waves arise from electronic devices.
AboutAbout the lab
Explaining from the basics how electromagnetic noise is emitted
The Kayano Lab studies electromagnetic compatibility (EMC), the discipline of enabling electronic devices to coexist and operate in complex electromagnetic environments.
Devices that use high-frequency electrical signals, such as computers, can radiate unwanted electromagnetic waves and interfere with other devices.
Working closely with the Xiao Lab in the same EMC field, the lab investigates how high-frequency signals propagate and how unwanted electromagnetic waves are generated, through both experiments and simulation.
The lab treats EMC problems on and around printed circuit boards as fundamental research, using simplified models to clarify the basic phenomena.
Key terms
- EMC
- The body of knowledge for enabling devices to coexist and operate even in complex electromagnetic environments
- Transmission line
- Wiring that carries high-frequency electrical signals, such as signal traces on a printed circuit board
- FDTD method
- A simulation method for numerically calculating electromagnetic fields
- Polynomial chaos expansion
- A statistical analysis method for cases with variability. It was proposed to improve the computational efficiency of conventional methods
ResearchResearch themes
As electronic devices become faster, smaller, and lighter, the lab studies high-frequency signal propagation and the generation of unwanted electromagnetic waves so that devices can operate without interfering with one another. Through EMC research, it also works on the optimal design of transmission lines and similar structures, new signal processing for high-frequency and broadband applications, and functional integrated circuits.
*Illustrative imageUnwanted Electromagnetic Emission from Circuit Boards
The lab investigates how high-frequency signals propagate along signal traces on printed circuit boards and how electromagnetic noise is radiated from those traces. It aims to clarify the mechanism of the emission using transmission line theory, FDTD simulation, and experiments.
*Illustrative imageTrouble-Free High-Performance Electrical Contacts
Electrical contacts, which open and close electric circuits, degrade in quality because of the arc discharge that occurs when they open, and they also produce electromagnetic noise. The lab aims to establish techniques for evaluating their performance and to clarify arc discharge through experiments.
*Illustrative imageStatistical Analysis of Transmission Lines with Variability
Because electrical characteristics change with variations in line layout and manufacturing tolerances, design and evaluation require statistical analysis. The lab examines analysis methods that use polynomial chaos expansion for multiconductor nonuniform transmission lines such as twisted-pair lines.
*Illustrative imageDispersive Delay Devices with Periodic Structures
Using a transmission line structure with periodic resonators and electromagnetic coupling sections, the lab aims to realize an unprecedented electromagnetic response known as negative group delay. It aims to develop a new broadband dispersive delay device.
MembersFaculty
The Kayano Lab consists of faculty members, master's students, and fourth-year undergraduate students.As of 2026
- ProfessorYoshiki Kayano
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Circuit board after manual etching” Tinux / CC0 (cropped)
- Unwanted Electromagnetic Emission from Circuit Boards: “Printed Circuit Board 9990” Ashley Pomeroy / CC BY 4.0 (cropped)
- Trouble-Free High-Performance Electrical Contacts: “Relay Contacts” Pineywoodsdavid / CC BY-SA 3.0 (cropped)
- Statistical Analysis of Transmission Lines with Variability: “Kabel und Draehte” Friedrich Haag / CC BY-SA 4.0 (cropped)
- Dispersive Delay Devices with Periodic Structures: “Microstrip Directional Coupler” Binarysequence / CC BY-SA 4.0 (cropped)
- Related lab (Xiao Lab): “Large Drive-In EMC Test Chamber” Binarysequence / CC BY-SA 3.0 (cropped)
- Related lab (Ando Lab): “FDTD TFSF (English)” User:Dominator9000 / CC BY-SA 4.0 (cropped)
- Related lab (Hobara Lab): “Lightning Pritzerbe 01 (MK)” Mathias Krumbholz / CC BY-SA 3.0 (cropped)
- Related lab (Ishikawa Lab): “Monolithic microwave integrated circuit MSA0686 fixed” Appaloosa / CC BY-SA 3.0 (cropped)
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