Introduction: Hisao Iwasaki, an inventive force based in Tama, Japan, has made significant contributions to the field of antenna technology. With nine patents to his name, Iwasaki's work focuses on enhancing mobile terminal designs and improving antenna functionalities.

Latest Patents: Iwasaki's latest patents include groundbreaking technologies such as an antenna structure and a mobile terminal featuring a unique antenna configuration. One of his inventions involves a flexible substrate that accommodates a meandering antenna element and a matching circuit disposed thereon. This design allows the antenna to be compactly wound within an antenna cap and efficiently mounted on a terminal body. A noteworthy feature of this invention is the rod-like antenna, which can extend and retract within the flexible substrate. When withdrawn, it utilizes capacitive coupling with the matching circuit, while its retraction leads to the activation of a linear antenna element.

His other recent patent focuses on an antenna apparatus where power is supplied to helical antenna elements arranged at 90-degree intervals. This setup introduces a phase difference of 90 degrees, optimizing performance. With careful design considerations, Iwasaki specifies that the height of the helical antenna section should be between 0.6 and 0.75 times the reception wavelength, ensuring effective functionality.

Career Highlights: Iwasaki is currently employed by Kabushiki Kaisha Toshiba, a leading firm in technology and innovation. His position has allowed him to leverage the company’s resources to advance his research in antenna designs, reflecting his passion and dedication to the field.

Collaborations: Iwasaki's inventive journey is enriched by the collaborative efforts of his peers, including fellow engineers Norimichi Chiba and Takashi Amano. Together, they contribute to the pioneering work at Toshiba, pushing the envelope in technology and innovation.

Conclusion: Hisao Iwasaki's work exemplifies the spirit of innovation in antenna technology. With a strong portfolio of patents and the collaboration of notable colleagues, his contributions will likely have a lasting impact on the future of mobile communication devices. Iwasaki continues to inspire the next generation of inventors and engineers in the ever-evolving field of technology.

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