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Location ID: 0501,0701,EN

Communications Engineering

Communications Engineering

About Communications Engineering

Studies involve a good balance of both hardware and software related to the various ways to convey information using communications network technologies, electronics, mobile wireless communications technologies, photonics, and information processing technologies (technology related to computers).

Research Domain

Mobile phones, RFID, ubiquitous networks, essential communications networks, photonic networks, acoustic systems, multimedia, disaster preparedness ICT, measurement technologies, sensors, sensor networks, multisensory communication, optical communication, optical fiber, lasers, optical access networks, high frequencies, antennas, digital terrestrial broadcasting, satellite broadcasting, mobile networks, LANs, neural systems, programming

Microwave Devices and Circuits Lab.

Shinichi Tanaka

We focus on developing state-of-the-art microwave function devices utilizing advanced circuit design technology based on metamaterial technology. Metamaterials* can be realized using circuit technology but for electromagnetic waves they behave like smart “materials” with properties that have not yet been found in nature. The new technology has been widely applied to passive microwave components, such as antennas, hybrid couplers and filters. Recently, we have proposed a new design method of metamaterial circuits, leading to high-performance, compact, and even low-cost design of active microwave components such as oscillators, amplifiers and rectifiers. This is crucial for microwave systems because the active components are the key to the overall performance, size and cost of the total system. Our recent achievements includes development of a triple-band rectifier for wireless power transmission or RF-energy harvesting systems [1], a low-phase noise oscillator for X-band radar systems [2], and highly efficient L-band power amplifier for cellular phone applications [3].

[1] T. Oka, T. Ogata, K. Saito, and S. Tanaka, Asia Pacific Microwave Conference (APMC), Sendai, 2014.
[2] S. Tanaka, H. Nishizawa, K. Takata and K. Saito, IEEE International Microwave Symposium (IMS), Phoenix, 2015.
[3] To be published

Triple-band rectifier using metamaterial frequency tuner
Triple-band rectifier using metamaterial frequency tuner
X-band low phase-noise oscillator using metamaterial resonator
X-band low phase-noise oscillator using metamaterial resonator
High efficiency amplifier using metamaterial harmonic tuning circuit
High efficiency amplifier using metamaterial harmonic tuning circuit

Networking and sensing through user terminal participation

Hiroaki Morino

We are interested in designing the next generation mobile network architecture and mobile computing systems. One of topics we are focusing on is realizing collaborative sensor networks by using user terminal participation, in which each user’s mobile terminal obtains live information from the real world by exploiting radio information or a variety of sensors equipped with them, and it uploads them to the server in the Internet to recognize the situation of the specific place. For example, we try to estimate crowd density at some place using users’ mobile phones, by that they obtain the signal strength and packet loss information of public WiFi access points there. We also address mitigating natural congestion that frequently occurs in highway through detecting congestion phenomena and sharing the congestion information by using vehicle ad hoc networks(VANET) and each car adjusts the velocity to reduce the congestion. The last example is assisting disaster relief. We address a method to record evacuation route trajectory of each person in indoor environment without GPS when the Internet is not available after the disaster occurs, by utilizing smartphone sensors such as acceleration sensors, gyro or air pressure sensors.

Mobile Information Networking Lab.
Mobile Information Networking Lab.
Lab. Detail Head of Lab. Keyword
Mobile Multimedia Communications Laboratory Detail Eiji Kamioka Bluetooth, Communication Engineering, Engineering, LTE, Mobile Communications, Telecommunications Engineering, UMTS, WiFi, WiMAX, Wireless Communications, Wireless Computing, Wireless LAN
Applied Informathematics Lab. Detail Yuchi Kanzawa Fuzzy clustering
Wireless Communications Network Laboratory Detail Koichi Gyoda ICT for Disaster Management and Mitigation, ICT for Safe and Secure Life, Wireless Ad Hoc Networks, Antenna Engineering
Wireless Ubiquitous Lab. Detail Shuji Kubota Forward error correction, modulation and demodulation, multiple access, Wireless LAN, Wireless PAN, OFDM, MIMO
Functional information engineering Lab. Detail Atsushi Saitoh sensor, gas sensor, odor sensor, SAW, monitoring system for the elderly, olfaction display
Microwave Communication Devices Laboratory Detail Shinichi Tanaka microwave, circuit design, RFIC, MMIC, microstrip line, wireless power transmission, left-handed metamaterial, composite right-/left-handed (CRLH) transmission line, high efficiency power amplifier, low phase-noise oscillator, rectifier, rectenna, CAD simulation, electro-magnetic analysis, compound semiconductor devices, device physics
Wireless Communications Lab. Detail Kazuhide Hirose Radio wave, antenna, numerical analysis, measurement
Laboratory for Bionic Communication Engineering Detail Horie Ryota Brain Computer Interface, Natural Interface, Biomedical Signal Processing, Cognitive Neuroscience, Neural Networks, Nonlinear Dynamics, Compact EEG Recorder, Smart Devices, Communication Protocols, Life Support System, Smart House Controller, Entertainment, Neuro Game, Optimization, Mathematical Biology
Communication Measurements Lab. Detail Tsuneo Horiguchi Optical communication systems,Wavelength division multiplexing,Fiber-optic sensing,Optical fibers,Brillouin scattering,Rayleigh scattering,Raman scattering,Coherent detection,Strain measurement,Fiber lasers,Optical cables,Light modulators
Information and Communication Network Lab. Detail Sumiko Miyata Resource allocation and admission control in networks,Media access control analysis for the optical network (EPON),Cooperative networks, Game theory, queueing theory and its applications in networks, Coalitional Game theory, Security of wireless and communication networks.
Acoustic Information Lab. Detail Kenji Muto Acoustical Noise, Active Control, Environmental sound
Mobile Information Networking Lab. Detail Hiroaki Morino Mobile computing, Wireless mesh networks, Sensor networks, Vehicle networks, P2PTV networks

The vision of the Department of Communications Engineering is to develop individuals having the following skills:

Basic academic intellect related to communications engineering and an attitude to pursue the problems facing ones’ field of expertise.
2. Systematic comprehension of the essence of communications engineering and thereby able to address any issues arising.
3. Problem-solving methodologies by exploiting multi-objective approaches, the trade-offs, and take into account potential impacts to society.

In order for people to live better lives, we need to deepen our understanding through interactions with the people, society, nature, and all sorts of information to build better relationships with these. The essence of communication is nothing less than putting all this into practice and information communication technology is a major help for this. At the Department of Communications Engineering, we aim to train people who can guide individuals, society, and nature in a better direction by studying information communication technology.
In Communications Engineering, we carry out research and education in a wide range of fields related to information communication, such as the following:

  • Optical communication networks and devices
  • Mobile and wireless communication networks and devices
  • Measuring and sensing
  • Multimedia, signal processing, information processing, software

We emphasize both a good balance of hardware and software technologies and the construction of a curriculum where students can learn from basics to applications, as well as the importance of learning through actual “things.”
The ideal student for the Department of Communications Engineering has the following attributes.

  1. Basic academic skills relevant for the related educational fields for learning communications engineering.
  2. An interest in the technologies used in the above information communication fields and their foundations and applications. In particular, those who want to achieve their dreams through information communication technology, as follows.
    (a) Technology for transmitting, recording, and playing back high quality video and music
    (b) A technology that allows natural communication with anyone, anywhere, any time.
    (c) Technology that allows people to feel that they are in remote places, without moving.
  3. Is prepared to make the effort to understand the true nature of communication and build better relationships with others.

The recruitment opportunities come from information communications related manufacturers, information system development/ICT solution companies, optical equipment/measurement equipment/audio equipment manufacturers, and telecom companies. Graduates are highly sought after for system design work required by society, by exploiting an integral knowledge of hardware, networks, and software.