Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 393-396 |
| Number of pages | 4 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 17 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2018 |
Keywords
- Antenna shape optimization
- electrically small antennas
- modal radiation efficiency
- radiation efficiency
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