Abstract
A new technique to achieve high front-to-back radiation ratios of slot antennas is presented. A 0.8 mm thin metasurface is loaded onto a circularly- polarised slot antenna and backed by a metallic reflector at close distances. The antenna has an overall height of ˜ 0.1 wavelengths. However, it exhibits wideband characteristics with a measured impedance bandwidth (voltage standing-wave ratio ⩽ 2) of 73.3% and a 3 dB axial-ratio bandwidth of 29.1%. A broadside gain of 7 dBic with a front-to-back ratio of 23.7 dB is achieved at 2.7 GHz.
| Original language | English |
|---|---|
| Number of pages | 2 |
| Journal | Electronics Letters |
| Volume | 49 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 2013 |
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