Location History:
- Otawara, JP (1991)
- Ohtawara, JP (1993)
- Kawasaki, JP (1985 - 1995)
Company Filing History:
Years Active: 1985-1995
Title: Isamu Umino: Innovator in Space Diversity Reception Systems
Introduction
Isamu Umino is a notable inventor based in Otawara, Japan. He has made significant contributions to the field of telecommunications, particularly in the development of advanced reception systems. With a total of five patents to his name, Umino's work has had a lasting impact on the industry.
Latest Patents
Among his latest patents is the innovative feed forward amplifier designed for space diversity reception systems. This system utilizes multiple receiving circuits, each connected to its respective antenna, to output a first type signal that varies according to the radio frequency signal level. An automatic gain-controlled amplifier then amplifies this signal to produce a second type signal with a substantially constant level. A phase control circuit detects and adjusts the phase difference between the second type signals from each amplifier, ensuring optimal performance. The combining circuit then merges these signals, allowing for the reception of multi-level quadrature amplitude modulation signals. This configuration not only enhances performance but also reduces costs by utilizing less expensive components.
Career Highlights
Isamu Umino is currently employed at Fujitsu Corporation, where he continues to innovate and develop cutting-edge technologies. His work has been instrumental in advancing the capabilities of communication systems, making them more efficient and reliable.
Collaborations
Umino has collaborated with notable colleagues such as Fumihiko Kobayashi and Zenichi Ohsawa. Their combined expertise has contributed to the successful development of various technologies in the field.
Conclusion
Isamu Umino's contributions to the field of telecommunications, particularly through his patents and innovative designs, have established him as a key figure in the industry. His work continues to influence advancements in communication technology, showcasing the importance of innovation in this rapidly evolving field.