Use of adaptive reactance control in optimum antenna design for transmitting power in near-mid ranges

To transmit power efficiently thought wireless network in the near-mid range, we propose the use of a novel power transmitting system. The system uses the adaptive reactance control and the suitable antenna structure enhancing this control. Simultaneous control of variable reactance attached to both transmitting receiving antennas allows power to be transmitted more efficiently than conventional simple impedance matching between antenna and circuitry. The evaluation function of the newly-derived power transmission efficiency under adaptive reactance control has a further function; it can be used with the numerical trial and error searching method in an antenna structure to identify novel structures that can improve transmission power. Analysis of a design of the proposed system with numerically-found antennas reviles that the system with adaptive reactance control and our antenna transmitted power ten times more efficiently than one that uses a conventional impedance matching method and a conventional antenna such as a dipole and a loop antennas.