Workshop Program

In the next generation wireless communication, beyond-5G/6G, millimeter-waves over 100 GHz are expected to be used, and the development of advanced materials for lower power consumption is crucial for realizing 6G. In the development of passive devices such as metamaterials, antennas, and frequency selective surfaces for beyond-5G/6G applications, it is essential to design them using material parameters at their operating frequencies, and to evaluate their performances using an antenna evaluation system for beyond-5G/6G applications.
In this workshop session, we will discuss material and antenna measurement techniques in the millimeter-wave bands for the development of passive devices for beyond-5G/6G applications. In addition, we will present our developments of passive devices based on high-precision measurement techniques; the D-band metamaterial reflectors and the W-band frequency selective surfaces.

Keyword ： Complex Permittivity Measurements, Conductivity Measurements, Antenna Measurements, Metamaterials, Frequency Selective Surfaces, Beyond-5G/6G

Recently, 5G communication technologies have been launched for commercial service. On the other hand, post-5G and 6G communication technologies are discussed for improving communication latency and connection density of the services than those of the 5G communication. The post-5G and 6G are expected to be core-technologies for enhancing industrial competitions. In ours NEDO project, circuit design and measurement technologies for novel high-frequency semi-conductor devices are studied for establishing semi-conductor design, fabrication, and measurement technologies within the country.
The workshop discusses introduction and overview of the NEDO project.

Keyword ： 5G/6G Communication Technologies, Millimeter-Wave CMOS Technologies, Millimeter-Wave On-Wafer Measurement Techniques

Millimeter-wave and terahertz wireless communications offer unique features, including very high data rates, not easily realizable by using lower frequencies. However, the challenge of hardware development and dealing with peculiar propagation properties, among others, remains to be met.
In this workshop, leading experts in the field will discuss selected topics of interest, including a vision and the state of the art of terahertz communications, a possible use case of 60-GHz communications, and millimeter-wave/terahertz phased-array communications.

Keyword ： Millimeter-Wave Communications, Terahertz Communications, Ultrahigh-Speed Wireless Communications, Radio Propagation, Phased Arrays, Integrated Circuits

Applications of WPT (Wireless Power Transfer) equipped system for consumer electronics and facility robots are widely expanding. Tesla trial at year 1900 at NY was historical start of WPT. At year 2007, MIT team has showed WPT which transfer at 2 m distance using magnetic resonant method. This MIT report triggered WPT capability for e-mobility (EV). WPT become familiar when the capability has equipped on smartphones using Qi standard. Airgap is necessary for remote power transfer in the system. Frequency management and limit of emission level from WPT system are discussed at ITU-R and CISPR. In Japan technical requirements are studied and defined at working group of MIC.
Main theme of this session is notification for regulation, radio act and safety of WPT.

Keyword ： Wireless Power Transfer, WPT, Qi standard, Electric Field Resonance WPT, Facility Robots, Safety Standard, Regulation Based on Act, Standardization

Recently, technologies using electromagnetic fields in seawater have been becoming one of attractive research topics.
In this workshop, three presentations will be given regarding wireless power transmission, wireless communications, and localization (positioning) in seawater. Each lecture shows not only technical aspects, but also its expected applications.

Keyword ： Electromagnetic Fields in Seawater, Wireless Communications, Wireless Power Transmission, Localization

This tutorial explains from fundamentals to designing knack to microwave and millimeter wave filters in a short time. This is the right choice for people such as students in laboratories, freshers who need to learn, people need to learn essence. Let's join the world of filters, which is inevitable for traditional GSM, 5G and even coming technology 6G.
By figuring out variety, designing flow and design of filters / what are Q, coupling coefficient, resonant frequency? / typical characters: Butterworth and Chebyshev / how does the metal cavity affect? / how to decide the figure and position of resonator / dual band filter, triple band filter and superconducting filter

Keyword ： Resonant Frequency, External Quality Factor, Coupling Coefficient, Unloaded Quality Factor, Cross Coupling, Bandpass Filter, Metal Cavity, Multi Band Filter

The field of application of electromagnetic waves is expanding to include high-speed mobile communications, undersea communications, and wireless power transmission. In order to develop these systems, computer simulation is important. On the other hand, simulating electromagnetic phenomena in real environments often requires a large amount of memory, which makes it impossible to perform calculations on a general-purpose PC. In such a case, it is necessary to use a so-called supercomputer.
In this session, we will discuss the basics and recent topics of electromagnetic field simulation using supercomputers, which are expected to become more and more necessary in the future.

Keyword ： High Performance Computer, Large-Scale Electromagnetic Simulation, MPI Programming, FDTD Method

In March 2020, the commercial service of the 5th generation mobile communications system (5G) started in Japan. 5G is the same as the previous evolution of the 4th generation mobile communications system (4G) in that it achieves high-speed communication, but it also has a new feature in that it can accommodate communication with users other than mobile terminals, such as vehicles and Internet of things (IoT) terminals. This is a reason of that 5G is expected to create and drive the use cases of remote and monitoring operations, education, and other new industries such as autonomous driving, automated factories, telework, etc. Therefore, the early spread and further evolution of 5G are much desired.
In this session, the new features of 5G are outlined and the prospects of 5G evolution/6G systems and devices are introduced.

Keyword ： 5G, 5G Evolution/6G, Mobile Communications System, 5G Devices, Enhanced Mobile Broadband, Ultra-Reliable and Low-Latency Communications, Massive Machine Type Communications

Amplifiers and oscillators are typical circuit applications for microwave transistors as active devices. There are many common aspects for them with the basic design principles and the circuit simulation techniques to achieve maximum performances of the transistors.
Session FR4A and FR4B are basic tutorial lectures focusing on the circuit simulation techniques for microwave amplifiers and oscillators. FR4A as part1 describes the amplifiers.

Keyword ： Microwave Transistor, Amplifier, Conjugate Matching, Transducer Power Gain

Amplifiers and oscillators are typical circuit applications for microwave transistors as active devices. There are many common aspects for them with the basic design principles and the circuit simulation techniques to achieve maximum performances of the transistors.
Session FR4A and FR4B are basic tutorial lectures focusing on the circuit simulation techniques for microwave amplifiers and oscillators. FR4B as part2 describes the oscillators.

Keyword ： Microwave Transistor, Oscillator, Oscillation Condition, Stable Oscillation