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Yoshimasu Lab
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The lab designs the high-frequency integrated circuits that underpin wireless communication.
AboutAbout the lab
Designing the inside of connected devices, starting from the circuit
The Yoshimasu Lab studies high-frequency integrated circuits for wireless communication.
Wireless devices such as mobile phones, car navigation systems, and satellite broadcasting receivers have become essential to daily life and work.
The lab covers a wide range, from the architecture of the radio section to the modeling of high-frequency transistors.
Students work through the whole process: designing with circuit simulators, fabricating prototype chips, and measuring their performance.
Key terms
- Radio-frequency IC (RFIC)
- An integrated circuit that handles high-frequency signals to generate and receive radio waves
- Modeling
- Describing the behavior of a component with mathematical equations so that the operation of a circuit can be predicted on a computer
- Oscillator
- A circuit that produces a signal at a fixed frequency. It generates the reference wave used in communication
ResearchResearch themes
The lab studies circuits applicable to wireless communication, covering everything from the architecture of the radio section to the modeling of high-frequency transistors. Amplifiers and oscillators often do not work as designed, so the lab starts by improving the accuracy of modeling, which is the foundation for this work.
*Illustrative imageModeling of High-Frequency Transistors
The modeling of high-frequency transistors is still not accurate enough, and as a result, circuits designed with it sometimes do not work as designed. The lab studies how to improve the accuracy of modeling, which is this fundamental problem.
*Illustrative imageBasic Building Blocks of High-Frequency Circuits
This research aims to improve the performance of the basic building blocks of high-frequency circuits, such as amplifiers and oscillators. The main focus is on low-noise amplifiers, power amplifiers, oscillators, and mixers.
*Illustrative imageNew Architectures for the Radio Section
Building on the research on basic building blocks, the lab pursues new configurations for the radio section itself.
MembersFaculty
- ProfessorToshihiko Yoshimasu
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: “Compact AIS antenna” ESA – G. Porter / CC BY-SA 3.0 (cropped)
- Modeling of High-Frequency Transistors: “ΜA791KC die” Mister rf / CC BY-SA 4.0 (cropped)
- Basic Building Blocks of High-Frequency Circuits: “Crystal oscillator internals” Marcin Andrzejewski / CC BY-SA 3.0 (cropped)
- New Architectures for the Radio Section: “base stations in Réunion Island” Parchaco / CC0 (cropped)
- Related lab (Tanzawa Lab): “TI AHC08 Die Shot (4x2-Input AND Gate)” Cole L / CC BY-SA 2.0 (cropped)
- Related lab (Ikehashi Lab): “Microstructure1234” Denis Elbl, KIT / CC BY-SA 4.0 (cropped)
- Related lab (Takahata Lab): “Silicon Photonics 300mm wafer” Ehsanshahoseini / CC BY-SA 4.0 (cropped)
- Related lab (Ikenaga Lab): “CMOS image sensor chip-scale package oblique” Phiarc / CC BY-SA 4.0 (cropped)
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