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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(Ξ,x)≈ΦA(x)−ΦB(x), where x is a signal, ΦA(x) is the phase angle of signal x at the first element pair, ΦB(x) is the phase angle of signal x at the second element pair, and Ξ contains all additional parameters which bear on the system. The network is configured to pass a signal for which F(Ξ,x)>ε, where ε is a threshold amount, such that the antenna has gain to signals within a radius and has attenuation outside the radius.