Electrically small wire monopole antenna with Non-Foster impedance element

Electrically small antennas have excessively high radiation quality factors and low radiation resistances. This also implies that these type of antennas are narrow band. Hence it is necessary to add appropriate matching networks between the generator and the antenna. With conventional passive matching networks it is difficult to match over wide frequency bands due to the limitation of the Gain-Bandwidth product. However, it is feasible for matching networks based on Non-Foster elements to overcome this limitation. In this paper, we present a Non-Foster matching network for an electrically small receiver antenna. The antenna with Non-Foster matching show remarkable improvement in antenna gain compared to the antenna without a matching network.