E-viri
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Li, Ruiyang; McNamara, Derek; Wei, Gao; Li, Jianzhou
IEEE antennas and wireless propagation letters, 2018-March, 2018-3-00, Letnik: 17, Številka: 3Journal Article
From the characteristic mode point of view of electrically small antennas, radiation efficiency normally decreases significantly if multiple modes are well excited. Among all these well-excited modes, the one with the lowest modal radiation efficiency determines how much actual radiation efficiency is guaranteed. Based on this idea, this letter proposes a method for improving antenna efficiency using shape optimization approach. The optimized shape can give rise to a high efficiency and an implied high gain after being excited using a single port whose location is easily selected by observing characteristic-mode current distributions.
