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| The IET is a world leading professional organisation sharing and advancing knowledge to promote science, engineering and technology across the world. |
| At and below the Chu limit: passive and active broad bandwidth metamaterial-based electrically small antennas |
| Ziolkowski,R.W. et al. |
| IET Microwaves, Antennas & Propagation(2007),1(1):116 |
| http://dx.doi.org/10.1049/iet-map:20050342 |