Masanobu Shimanuki

Title: Masanobu Shimanuki: Radio and Antenna Innovations.

Introduction

Masanobu Shimanuki is an inventor associated with Yokohama, Japan. His work includes radio-frequency temperature compensation and antenna design for portable communication terminals. He is credited with 12 patents.

Latest Patents

Shimanuki’s listed patents include “Temperature Compensating Circuit, Electronic Apparatus and Radio Unit Having Temperature Compensating Function.” The invention detects ambient temperature, corrects the measured value, and uses the corrected value to select frequency-correction data. A digital-to-analog converter turns that data into a control voltage for a variable-capacitance element, helping stabilize a reference oscillator’s frequency as temperature changes.

Another listed patent is “Helical Antenna and Portable Communication Terminal.” It describes an antenna element with a helical lower portion and a linear upper portion, together with a cap that positions the linear portion along the helix’s axis. The design aims to maintain suitable spacing between the antenna and the user’s body, supporting reliable antenna performance.

Career Highlights

Shimanuki’s listed company affiliations include Kabushiki Kaisha Toshiba, commonly known as Toshiba, and Tokyo Shibaura Denki Kabushiki Kaisha. The patent examples reflect work on components and systems used in radio units and portable communications equipment.

Collaborations

Shouichi Ishii and Taiken Hagiwara are identified as Shimanuki’s coworkers.

Conclusion

Masanobu Shimanuki’s patent portfolio highlights practical innovations in temperature-stable radio circuitry and antenna design for portable communication devices.