Location History:
- Tokyo, JP (1983)
- Tanashi, JP (1989)
- Hatoyama, JP (1993)
- Saitama, JP (1994 - 2001)
Company Filing History:
3 out of 339 
2 out of 226 
1 out of 833,002 Years Active: 1983-2001
Title: Innovations of Yoshio Karasawa
Introduction
Yoshio Karasawa is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of communications technology, holding a total of 6 patents. His work primarily focuses on advanced antenna systems and optical communication methods.
Latest Patents
One of his latest patents is an array antenna apparatus designed for use in spread spectrum communications. This apparatus includes multiple antenna elements aligned in a straight line, which are utilized in receiving stations to capture spread-spectrum modulated radio signals. The design allows for effective communication using a two-dimensional RAKE receiving method, particularly in code division multiple access scenarios. The spacing between the antenna elements is carefully calculated to optimize performance, ensuring it is greater than one half but less than sixteen times the wavelength of the carrier frequency. Another significant patent involves a system for optical wave transmission, which facilitates communication between mobile units and an exchange station. This system converts electric signals from a telephone exchange into optical signals, which are then transmitted via optical fiber cables.
Career Highlights
Throughout his career, Yoshio Karasawa has worked with prominent companies such as Kokusai Denshin Denwa Kabushiki Kaisha and Kokusai Denshin Denwa Co., Ltd. His innovative approaches have led to advancements in communication technologies, enhancing the efficiency and effectiveness of signal transmission.
Collaborations
Yoshio has collaborated with notable individuals in the field, including Hisato Iwai and Takayasu Shiokawa. Their combined expertise has contributed to the development of cutting-edge technologies in communications.
Conclusion
Yoshio Karasawa's contributions to the field of communications through his patents and collaborations highlight his role as a significant innovator. His work continues to influence advancements in technology, making a lasting impact on the industry.