A study of electrically small high efficient antennas

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420359
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: Ehime University
• Principal Investigator: Matsunaga Mayumi 愛媛大学, 理工学研究科(工学系), 講師 (30325360)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: アンテナ / 円偏波 / 多周波アンテナ / 多偏波アンテナ / 高効率 / 小型 / 平面 / 移動通信

Outline of Final Research Achievements

An electrically small high efficient antenna has been studied in this project. As results of the study, an electrically small high-efficiency antenna whose size is as small as a quarter of conventional patch antennas and whose efficiency is 90% or more has been successfully achieved. Moreover, the antenna has been developed into one that can be simultaneously used in two or more mobile-phone bands and GPS. And a mechanism which can feed the antenna through unbalanced feeders has been suggested.
In this study, the cross-shaped loop antenna invented by the author is used as a basic structure. The fact that this cross-shaped structure is a key idea for developing this electrically small high efficient antenna has been shown, and the fact has given birth to the new invention of a circularly polarized antenna which can electrically switch its polarization-sense.

Free Research Field

電波工学、アンテナ・電波伝搬、マイクロ波・ミリ波・テラヘルツ波