Figure Merits of active electronically steered array antennaLow-Prole Active Electronically Steered Array Antenna Enabling Internet Services in Small AircraftOKURA Takuyaecently, the demand for Internet access by people on board large aircraft has been increasing alongside the development of mobile phones. Addition-ally, according to the future trends in com-mercial aircraft and the defense / space market that Boeing announced in October 2020 (Boeing Market Outlook, BMO), the number of commercial aircraft is expect-ed to increase from 25,900 to 48,400 over the next 20 years. Furthermore, according to demand forecasts by aircraft model, de-mand for small / medium-sized aircrafts such as regional aircraft (90 seats or less) and narrow-body aircraft (90 seats or more) is expected to be approximately 35,000 air-craft. It is expected that demand for aircraft satellite communications will signicant-ly increase in order to provide broadband services for both these aircraft as well as for large aircraft. Therefore, eective use of fre-quencies has become an essential issue to increase the speed and capacity of satellite communication systems, and higher per-formance aircraft-mounted satellite com-munication antennas are required.Generally, it is necessary to increase the antenna’s aperture to improve its perfor-mance. However, with conventional me-chanically driven antennas, the antenna becomes three-dimensionally large, which makes it dicult to mount on small / me-dium-sized aircraft. Therefore, through re-search and development of a low-prole active electronically steered array antenna, we aim to contribute to eective frequen-cy utilization by establishing technology to improve antenna performance without compromising aircraft mountability and improving frequency utilization eciency by more than 30% with multi-value modu-lation methods.Researcher, Space Communi-cations Laboratory, Wireless Networks Research CenterPh.D.(Engineering)By the end of the current scal year, we plan to actually mount a sub-array antenna, which is part of the array antenna, on an aircraft and evaluate the antenna’s perfor-mance. If we achieve our targets without any problems, then I believe that this will be the rst step towards signicantly chang-ing the in-flight internet environment. (This study is conducted under the commis-sioned research of the “Research and devel-opment on narrowband technology using active electronically steered array antenna that can be mounted on small aircrafts” (JPJ000254) by the Ministry of Internal Af-fairs and Communications, Japan.)●Biography1990 Born in Okayama Prefecture2012 Graduated from Yokohama National University, Faculty of Engineering with Electrical and Computer Engineering2013 Completed rst two years of doctoral program at Yokohama National University, Graduate School of Engineering in Physics, Electrical and Computer Engineering2016 Completed doctoral program at Yokohama National University, Graduate School of Engineering in Physics, Electrical and Computer Engineering, and joined Microwave Factory Co., Ltd.2017 Joined NICT, current position●Awards, etc.2020 Recipient of the Institute of Electronics, Information and Communication Engineers’ 2019 (82nd) Communications Society Young Researcher’s AwardRQ&AsFile 14What do you like the most about being a researcher?Being able to experience the latest technology is the rst step in bringing an “It’d be great if we could do this...” type idea to life. I can also go to a variety of places for academic conferences and experiments (with local gourmet food being one of the pleasures).What are you currently interested in outside of your research?Driving. I signed up for a car sharing program after feeling that COVID-19 made traveling by public transportation a bit scary. At rst, it was simply a means of transportation, but the driving itself gradually became fun. Someday, I want to buy a car I love.What advice would you like to pass on to people aspiring to be researchers?When I was a student, I was assigned to a laboratory and found it fascinating, thinking, “Research is quite interesting,” so I decided to get a Ph.D. and become a researcher. If you feel the charms and allure of research, then I hope you will cherish that feeling and become a researcher.QAQAQA13NICT NEWS 2021 No.1
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