Cloaked half-wave dipole antennas using the mantle- cloaking approach

In this paper, we show how it is possible to realistically cloak half-wave dipole antennas in transmitting and receiving regimes by using the mantle-cloaking approach. In particular, we first propose the design of a cloaked half-wave receiving dipole and investigate the improvement in terms of absorption efficiency. In agreement with the theoretical limitations, we demonstrate that it is possible to cloak the dipole and still receive, under TM plane-wave illumination, an amount of power that is four times higher compared to the case of a short dipole with same scattering crosssection. Next, we apply the mantle-cloaking approach to a multiple-antenna scenario, in order to reduce the mutual blockage effect between two resonant dipoles placed in close electrical proximity. The cloak designs proposed in the paper can be realistically and easily fabricated and its employment may open the door to new co-siting strategies of antennas in complex platforms, such as satellite payloads, ships, planes, etc.