Workshop Program

In the 6G era, the construction of non-terrestrial networks (NTN) is expected to expand communication coverage seamlessly connecting land, sea, and air. In Japan, Q/V-band Low Earth Orbit (LEO) satellite constellation is being developed which is higher frequency than Ka band (e.g. Starlink). Moreover, W-band fundamental technologies is also being developed for Onboard satellites which is expected to be used in the future.
In this session, we will introduce the cutting edge of these research and development and also give a lecture on the technical prospects for LEO satellite constellations in the future 6G era.

Keyword ： 6G, Terrestrial Network, Non-Terrestrial Network, LEO satellite Constellation

Research and development of wireless communication using the terahertz band is progressing from research and development of elemental technologies to system development for realizing use cases. However, there are still technical and standardization issues to be resolved.
In this session, we will introduce ultra-high capacity wireless LAN systems currently under development using terahertz, millimeter-wave, and microwave bands, and clarify key underlying technologies, anticipated use cases, and remaining challenges.

Keyword ： 6th Generation Mobile Communication System (6G), Terahertz, Phased-Array, Integrated Circuit, CMOS, Antenna Design, MAC, Wireless LAN, IEEE, International Standardization

In recent years, metasurfaces and Reconfigurable Intelligent Surfaces (RIS) have attracted significant attention as technologies capable of flexibly controlling radio wave propagation characteristics. Metasurfaces and RIS respond to incident radio waves through re-radiation, enabling efficient collection of radio energy in space by utilizing large-area structures and concentrating it at specific locations. On the other hand, since they are passive elements without transmission or reception functions, channel estimation is challenging, and clear practical applications remain insufficiently established.
This workshop addresses these challenges by presenting the latest research trends, practical approaches toward implementation, and application examples of metasurfaces and RIS from the perspectives of antennas, propagation, and systems, as well as discussing future directions.

Keyword ： Metasurface, Reconfigurable Intelligent Surface, Antennas and Propagation, Control of Propagation Environment

In recent years, with the rapid progress of wireless information and communication technologies, the shift to higher frequencies of communication, as typified by beyond 5G / 6G, is rapidly advancing. With this situation, the development of high-performance and high-reliability passive devices that operate in the microwave / millimeter-wave bands has become more important than ever.
This workshop focuses on passive devices in the microwave / millimeter-wave bands, and introduces the advanced research and development trends from the viewpoints of material technology, structural design, manufacturing process, and theoretical analysis.

Keyword ： Microwave and Milimeter-Wave Passive Circuit, LTCC, Metasurface, Filter Theory, Waveguide Circuit, 3D Printing Technology

The design of microwave and RF circuits is a field that demands a high level of expertise and extensive experience. Since for many types of high-frequency circuits, rigorous theoretical design theory hasn't yet to be fully established, traditional design processes often relied on approximate theoretical formulas for initial designs, followed by extensive trial-and-error adjustments performed by experienced engineers. In recent years, advances in AI technologies and optimization algorithms, along with the development of CAD-based design support tools, have rapidly accelerated the automation and efficiency of the design process.
] This session introduces the recent trends in automated design technologies that utilize neural networks and evolutionary algorithms to efficiently design circuits such as RF filters and amplifiers. It also covers practical methods for automation using commercial CAD tools.

Keyword ： AI, Artificial Intelligence, ANN, Circuit Design, Automated Microwave and RF Circuit Design, Optimization, CAD

Five years have passed since the launch of 5G services. Though 5G is becoming more widespread, it is only halfway to the revolutionary performance improvement from 4G that was expected. Therefore, further performance improvements are required for elemental devices. Among these, the performance improvement of power amplifiers accounts for a large proportion, and performance improvements are required from various perspectives such as wider bandwidth, higher frequency, higher efficiency, improved linearity, smaller size, and improved reliability.
In this workshop, presenters from manufacturers who are at the forefront of research, development or supply of GaN power amplifiers will introduce the latest research and development status. Additionally, we will discuss the future direction of required power amplifier development.

Keyword ： Wireless Communication, GaN Power Amplifier, Doherty Amplifier, Class-J Amplifier, X-Band, Upper-6-GHz Band, Sub-6-GHz Band

Recently, research and development (R&D) projects, technical studies, and experimental trials have been actively promoted worldwide toward the realization of 6G. In Japan, the XG Mobile Promotion Forum (XGMF) is leading such 6G activities. XGMF aims to strengthen Japan's international leadership in the 6G era and contribute to the growth of the information and communication industry by creating innovative technologies and new use cases. Currently, it promotes 6G R&D and international collaboration in six projects.
In this session, we will introduce an outline of these 6G activities in XGMF. In addition, working groups representing XGMF 6G Radio Technology Project will introduce the details of recent 6G radio technologies that are being studied and compiled in Japan, and discuss technical challenges and the direction of future evolution towards 6G.

Keyword ： 6G, Beyond 5G, XG Mobile Promotion Forum (XGMF), Radio Technology, Research and Development, Technological Trend

The spatial wireless transmission system has already been legalized, and research and development activities for practical applications are now in rapid progress.
This course will provide a foundational overview of the entire power transmission and reception system and its applications. It will not only cover wireless power transfer systems but also their application fields. Additionally, a practical design course will be conducted for the wireless power reception devices. Regarding rectifiers, which have historically been challenging to achieve high performance in general-purpose devices, this course will explain design examples using specific rectifier diodes.

Keyword ：

Electromagnetic waves in the terahertz frequency region have been used in the field of spectroscopy and/or sensing, and in recent years, the use of terahertz waves in wireless communications has attracted attention from the viewpoint of its potential for high-capacity transmission. On the other hand, the unique advantages and disadvantages of terahertz waves have been discussed, and there is a lack of consensus on how much the use of terahertz waves will benefit our society.
This workshop will present the basics, current status and future developments of terahertz technology, taking into account the history of terahertz technology.

Keyword ： Terahertz, Wireless Communication, Beyond 5G, Use Cases

Terahertz waves (0.1-100THz), once considered an unexplored domain due to their high frequency as microwaves and low energy as light, making detection difficult, are now attracting attention not only in next-generation communication (6G) but also in the sensing field due to their characteristics of penetration and resolution below 1 cm.
In this workshop, we will introduce the latest technological trends in photonic devices as light sources and frequency conversion elements in the 300GHz band, the forefront of silicon photonics technology that bridges light and electronic circuits, and examples of applications in imaging.

Keyword ： Terahertz, Optoelectronic Convergence Technology, Silicon-Photonics, Nonlinear Photonics, Tomographic Imaging

To realize high-speed and large-capacity communication in Beyond 5G/6G, it is essential to use of higher frequency bands such as millimeter wave and sub-terahertz wave, and to realize high-gain beamforming antennas. Furthermoer, the practical application of these antenna devices is also an urgent issue.
In this session, leading researchers at the antenna field will present the latest antenna technologies for next generation communications.

Keyword ： Beyond 5G, 6G, Millimeter Wave, Sub-Terahertz Wave, Reflectarray Antenna, Dielectric Lens, Array Antenna

In recent years, computational science has made rapid progress not only in large-scale, high-speed, and high-precision computation, but also in machine learning and quantum computation. In the fields of radio propagation and radar technology, there have been attempts to actively incorporate these new computational schemes.
In this workshop, the latest developments in quantum computation and generative modeling for radio propagation estimation and ground-penetrating radar estimation using deep learning and FDTD will be presented.

Keyword ： Radio Propagation, Radar, Quantum Computing, Generative Model, Deep Learning