Abstract
In this letter the advantages offered by ε‐near‐zero materials as substrates for horizontal dipole antennas near a ground plane are theoretically studied. From the previous work it is known that substrates with extremely low values of permittivity dramatically enhance radiation from horizontal currents over a ground plane. On the other hand, as reported in this letter, frequency dispersion and the finite size of the substrate limit the achievable enhancement in antenna performance.
Original language | English |
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Pages (from-to) | 2674-2677 |
Number of pages | 4 |
Journal | Microwave and Optical Technology Letters |
Volume | 50 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2008 |
MoE publication type | A1 Journal article-refereed |
Keywords
- dipole antenna
- conducting surface
- near-zero permittivity
- dispersion
- quality factor