Workshop Program

In this course, we will explain microwave and millimeter-wave band high-power amplifiers for communications such as 5G / 6G. For effective use of limited frequency resources, sending large volume of communication traffic in or over spectral band is quite important technology in the IoT age these days where everything is connected online, and we can watch movies on our smartphones easily. Meanwhile wireless signals have wide timewise fluctuation of amplitude which is quite a burden for high-power amplifiers. Those high-power amplifiers are needed to facilitate more than ten-times output capacity than average and high linearity output power is required to input power. As a result, power consumption and non-linearity increased, and we have to deal with it.
This session will explain from the logic to the practice of efficiency optimization, distortion compensation and implementation technologies for high-spec and outstanding high-power amplifiers.

Keyword ： Power Amplifier, Microwave, Millimeter Wave, Doherty Amplifier, Envelope Tracking Amplifier, Digital Amplifier, Distortion Compensation Technique

Linear algebra is widely learned as the basis of high-level mathematics.
This introductory lecture explains with some examples how linear algebra is used in antennas and wireless communication systems. The primary purpose of this lecture is that the audience learns to connect linear algebra with physics organically. In addition, it is expected that the audience will understand and manipulate linear algebra as a tool for the analysis of antennas and wireless systems.

Keyword ： Array Antenna, Linear Algebra, Wireless System, Propagation Channel, MIMO

Array antenna is a key technology in the field of communications and measurements because of its various functions such as high gain, beam shaping, interference suppression.
In this session, two latest advanced technologies of array antenna applications will be introduced.

Keyword ： Array Antenna, MIMO Radar, Imaging, MIMO Transmission

With the advancement of device technology in the millimeter and terahertz frequencies, applications to sensing systems that take advantage of the properties of these wavelengths are being developed.
In this session, we will introduce cutting-edge researches on non-contact, non-invasive and non-destructive measurement of living organisms and their surrounding environment in various ranges from the microscopic cellular scale to the macroscopic human body scale. In addition, through these examples, we will share perspectives for systemizing and applying elemental technologies that are expected to make further progress toward the Beyond 5G era.

Keyword ： Millimeter-Wave Sensing, Terahertz Sensing, Radar, Nanocarbon, Flexible, Biosensing

Microwave/millimeter-wave imaging enables us to obtain non-contact and non-destructive inspection/diagnosis of objects/items through a remote measurement. Recently, advanced microwave/millimeter-wave imaging technologies combined with photonic and vector signal analysis techniques have been developed, and their applications to security systems and infrastructure inspections are attracting a lot of interest.
In this session, state-of-the-art microwave/millimeter-wave imaging systems and their applications are introduced and discussed.

Keyword ： Microwave Imaging, Radar, Security Systems, Microwave Interferometry Radio-Over-Fiber, Non-Destructive Inspection

Cyber-physical system (CPS) based on the fusion of cyber- and physical-spaces is being studied in various fields as a fundamental technology for the realization of Society 5.0. In the wireless communication field, research and development of wireless emulators that can imitate radio wave propagation with high accuracy in a virtual environment and verify the behavior of physical devices including applications have been started. The wireless emulator will bring many merits to various players by developing it as a verification platform for various use cases that utilize wireless communication.
In this workshop, R & D actors will take the stage not only to provide the technical discussions of wireless emulators but also to present the goals and expectations from the user's perspective.

Keyword ： Cyber-Physical Fusion, Wireless Emulator, Testbed, Smart Office, Radio Wave Visualization, Millimeter-Wave Radar, Autonomous Driving

In recent years, several attractive cases have been discovered in microwave chemistry, such as the ability to supply energy directly to the reaction field in chemical reactions and material processes, that can dramatically improve energy saving effects and chemical reaction yields. Indeed, the technology of microwave chemistry has begun to be introduced as a means of production by chemical companies. Furthermore, to further promote social implementation, it is necessary to determine the advantages of technologies that can be achieved using only microwaves, in addition to the features that conventional heating does not have. Therefore, it is essential to develop peripheral technologies, including devices unique to microwave chemistry, that are different from communication technologies.
In this workshop, we will introduce the latest developments in power devices and latest technologies for microwave chemistry, and in the panel discussion, we will discuss the related issues to generalize this technology.

Keyword ： Microwave Chemistry, High-Power Transistor, Single-Mode Applicator, Microwavelamp

S-parameters are widely used in the design and measurement of microwave circuits. Recently, circuit simulators and electromagnetic simulators have become increasingly convenient. As a result, we have less opportunity to calculate S-parameters. It is difficult to understand microwave circuits.
In this session, basic knowledge of S-parameters is explained for beginners. In addition, examples of S-parameter calculation are introduced for the purpose of microwave circuit design.

Keyword ： S-Parameter, F-Parameter, Passive Circuit, Termination, Loop Coupler

The spread of mobile phones and smartphones has made wireless communication very familiar. However, it would not be widely known how wireless communication devices such as mobile phones are structured and how they work.
In this TH4B session, the following items are explained in an easy-to-understand manner with the latest examples.
1) Fundamentals of wireless communication and examples of wireless blocks in mobile phones,
2) Element circuits that make up wireless circuits and their operating principles.

Keyword ： Wireless Communication Device, Mobile Phone, Filter, Power Amplifier, Low Noise Amplifier, Mixer, Voltage Control Oscillator, Modulator-Demodulator