A compact, high-performance, multifunctional high-frequency circuit that manipulates radio waves.
Information and Communication Technology (Saitama University Research Seed Collection 2025-27 p.74)
Keywords: wireless communication, microwave, millimeter wave, high-frequency circuit, filter, power divider, antenna
Currently, with the rapid development and application of various wireless communication systems such as smartphones, Wi-Fi, and IoT devices, efforts are being made to efficiently utilize existing electromagnetic wave frequency resources and to explore unused high-frequency resources. Various new research challenges associated with the development of new businesses using radio waves and the transition to even higher frequencies are gaining attention. In this context, our research laboratory is addressing these challenges through the research and development of high-frequency circuits that are essential for wireless communication devices, particularly compact, high-performance, multifunctional microwave and millimeter-wave filters, antennas, power dividers, and their composite circuits. We are conducting a wide range of research, from fundamental theory to engineering applications, including the proposal of circuits with excellent functionality, the elucidation of their electromagnetic wave phenomena, and the establishment of new design methodologies.
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Professor Tetsuo Ma Graduate School of Science and Technology, Department of Mathematical and Electronic Information, Field of Electrical and Electronic Physics 【Recent Research Themes】 ● Research on various types of compact high-performance microwave and millimeter-wave filters ● Research on microwave filters using dielectric monoblocks ● Research on high-frequency wideband power dividers ● Research on microwave wideband matching circuits
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【Appeal Points to the Industry】 ● Our laboratory has been engaged in research on high-frequency filters for many years and can design filters with various structures and specifications. ● We are tackling various new research topics by utilizing government research grants and collaborative research with companies. Our research results are highly regarded both domestically and internationally. 【Examples of Practical Applications】 ● Ultra-wideband (UWB) microwave filters for communication ● Millimeter-wave broadband filters for automotive radar systems ● Multi-frequency shared filters ● Microwave filters using multi-mode dielectric resonators ● Compact low-loss high-temperature superconducting microwave filters
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Ultra-wideband (10MHz - 4GHz) compact power divider
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.