Location History:
- Tokorozawa, JA (1978)
- Tokotozawa, JP (1983)
- Tokorozawa, JP (1980 - 1989)
Company Filing History:
5 out of 42,508 
1 out of 9 Years Active: 1978-1989
Title: **Innovative Contributions of Junichi Nakagawa in Radio Communication Technology**
Introduction:
Junichi Nakagawa, based in Tokorozawa, Japan, is an accomplished inventor with a total of five patents to his name. His innovations focus primarily on advancements in radio communication technology, where he has made significant contributions to the field.
Latest Patents:
One of Nakagawa's latest inventions is a **radio communication apparatus free from interference between local** signals. This apparatus employs a novel structure, featuring a frequency synthesizer and a frequency modulator designed to eliminate interference between local and transmission signals. The frequency synthesizer utilizes a local oscillator controlled by a first phase comparator to achieve precise signal transmission. Similarly, the frequency modulator employs a transmission oscillator managed by a second phase comparator, ensuring accurate phase comparisons and efficient transmission.
Another notable invention is the **phase coincidence detector**. This device examines whether two input digital signals are coincident by using both delay and advance signals derived from a digital phase comparator. This invention addresses the challenge of detecting phase differences by outputting periodic pulse signals and discriminating between them to indicate in-phase and out-of-phase states.
Career Highlights:
Junichi Nakagawa’s professional journey includes significant tenures at prominent companies, such as Hitachi, Ltd. and Hitachi Video Engineering. His work at these institutions has been instrumental in shaping the landscape of radio communication technologies.
Collaborations:
Throughout his career, Nakagawa has collaborated with esteemed colleagues, including Yoshitomo Kuwamoto and Yoshitaka Takasaki. These partnerships have fostered innovative solutions and advancements in their respective fields.
Conclusion:
Junichi Nakagawa's contributions to radio communication technologies, particularly through his latest patents and collaborations, underscore the importance of innovation in enhancing the functionality and efficiency of communication systems. His inventiveness not only reflects his expertise but also impacts the technological advancements within the industry.