Workshop Program

promote the introduction of new technologies and the development of new businesses through effective radio wave utilization.
Against the background of rapidly increasing demand for the use of radio waves, this lecture introduces the latest trends in radio frequency policies, including the rollout of new systems promoting the more efficient use of radio waves.

Rapid advances in artificial intelligence, the practical development of quantum computing, and continued progress in semiconductor technologies are shifting the focus of value creation from individual technologies to systems and, ultimately, to industrial ecosystems.
This keynote provides a broad perspective on the future shaped by quantum, AI, and semiconductors. It also discusses the role of microwave and RF technologies in enabling next-generation systems and explores new directions for strengthening Japan's competitiveness.

The war in Ukraine and other recent military developments have demonstrated that electromagnetic waves-particularly microwaves used in radar, communications, electronic warfare, and satellite systems-have become a common foundation underpinning operations across the entire battlespace.
A key challenge is to network a wide range of sensors, communications systems, electronic warfare capabilities, command and control (C2) systems, and fires, while incorporating artificial intelligence and emerging technologies to enable the continuous evolution of defense capabilities.
It is also essential to establish experimental and demonstration facilities that can replicate realistic operational environments and allow flexible use of the radio-frequency spectrum.

Radiative Wireless power transfer, which was first put into practical use in 2022, has now been permitted for outdoor use following a revision of ministerial ordinances this year, and can also be used as an unlicensed specified low-power radio station. This deregulation is leading to the consideration of its use across various applications, including IoT and Physical AI.
In this introductory course, the basic technologies and applications of radiative wireless power transfer will be explained with specific examples.

Keyword ： Radiative Wireless Power Transfer, Wireless Power Transmission, Radio Act, Rectenna

920MHz band wireless networks are expected to serve as wireless infrastructure of IoT systems based on wireless sensor networks. Owing to advantages of 920MHz band wireless networks, such as unlicensed band, low power consumption, and inexpensive transceivers, the wireless networks are considered for the IoT systems.
This workshop presents the use case for IoT systems based on 920MHz band wireless networks, which are designed for use in several environments and situations, including during disasters, in mountainous and rural areas, and beneath manholes.

Keyword ： 920MHz Band, LPWA, IoT Systems

To realize next-generation wireless communications such as 5G/6G and terahertz communications, high-frequency passive circuit technologies are required not only to achieve higher performance and enhanced functionality, but also to be integrated with emerging technologies such as artificial intelligence (AI), metamaterials, and microelectromechanical systems (MEMS).
This session focuses on passive circuit technologies spanning from the microwave to the terahertz frequency bands, and presents recent research advances in next-generation filter design using deep reinforcement learning, terahertz-wave control devices based on MEMS and metamaterials, and electronically controlled nonreciprocal metamaterial transmission lines. Through these presentations, the future prospects of next-generation high-frequency passive circuit technologies will be discussed.

Keyword ： Microwave/Millimeter-Wave/Terahertz Passive Circuit, Artificial Intelligence (AI), MEMS, Metamaterials, Nonreciprocal Circuits, Filter Design, Electronic Control

The sub-terahertz band has attracted significant attention as a promising spectrum resource for enabling future ultra-high-speed and high-capacity wireless communications.
This session will provide an overview of the latest standardization activities for high-frequency wireless LANs within IEEE 802.11, as well as ongoing efforts toward the realization of terahertz-band wireless LAN systems. The session will also highlight recent advances in hardware technologies, including 300-GHz beam-scanning antennas. In addition, the regulatory framework for experimental radio stations in the sub-terahertz band will be discussed, addressing key challenges and future prospects for the practical deployment and widespread adoption of sub-terahertz wireless systems.

Keyword ： Sub-Terahertz Band, IEEE 802.11, Terahertz Wireless LAN, Beam-Scanning Antenna, Network Control, Radio Spectrum Regulatory Framework