Abstract: Range limited antenna includes first and second pair of antenna elements, and an RF signal processing network connected to both pair of antenna elements. The network has a function, F(?,x)??A(x)??B(x), where x is a signal, ?A(x) is the phase angle of signal x at the first element pair, ?B(x) is the phase angle of signal x at the second element pair, and ? contains all additional parameters which bear on the system. The network is configured to pass a signal for which F(?,x)>?, where ? is a threshold amount, such that the antenna has gain to signals within a radius and has attenuation outside the radius.