The purpose of this invention is to put forward especially tailored circuit elements that mimic tailored frequency dispersion in materials using which we can enhance the bandwidth of electrically small inductive or capacitive antennas beyond what is possible using conventional matching approaches without need for active power-hungry elements.
This invention addresses the need for broader bandwidth in electrically small antennas. The Chu lower bound on the quality factor of linear, passive, time invariant, one-port dipole antennas characterized by a single resonance has been accepted as a general bound for decades. Naturally, this lower bound for the quality factor of an antenna, and consequently the maximum achievable bandwidth, can be overcome by adding loss to the antenna, which comes at the cost of efficiency loss. This invention proposes new approaches to overcome this bandwidth limit on electrically small antennas.
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