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Increasing Radiation Efficiency Using Antenna Shape Optimization Approach
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DOI：10.1109/LAWP.2018.2791585.png)
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Abstract
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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.
Keywords:
Antenna shape optimization
electrically small antennas
modal radiation efficiency
radiation efficiency
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