Non - foster circuitry design for antennas

A novel technique is introduced to optimize the use of negative networks in antennas. It is shown that by adding ports inside the antenna structure and appropriately applying very few negative elements, the usual at low frequencies small input resistance is increased close to characteristic impedance values while input reactance is reduced to values around zero. In that way antenna efficiency and its bandwidth are greatly enhanced. An example presented to explain the method; a narrow resonant loop is decreased 50% in size and obtains 100% bandwidth with the use of two negative elements placed in series inside the antenna structure.