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This paper demonstrates the design and the analysis of a novel type of horn antennas with a potentially higher directivity. The idea is to replace one plate of an H-plane horn antenna with a plate that has specially designed surface impedance. In our case we generated the surface impedance variation that corresponds to a Luneburg law, thus obtaining the Luneburg lens effect and consequentially increasing...
This paper demonstrates the properties of an H-plane horn antenna with its characteristics improved using the principle of variable surface impedance. Modifying the surface boundary conditions on one surface of the parallel plate structure is possible by using printed patches of variable size. By doing so, surface impedance profile which corresponds to Luneburg law can be realized. Luneburg lens designed...
A Luneburg lens designed by using a variable artificial surface is reported. Planar lens inside parallel waveguide is designed using Fakir's bed of nails substrate to modulate the surface impedance on a boundary of the waveguide in order to obtain the desired refraction index for the guided wave.
This paper presents a new type of circularly polarized dielectric-lens antenna designed by using a holographic principle. The antenna is very simple to be designed and presents the same technological complexity that normal dielectric lenses. It exhibits a clear advantage w.r.t. conventional dielectric antenna solution for its flatness. Our process starts from the identification of a canonical local...
The concept of modulation of surface impedance is used to design very simple leaky wave lens antennas. The antennas are circularly polarized and realized on planar surfaces. Such antennas are designed by using a holographic principle and interpreting the holographic interference pattern in terms of modulation of surface impedance. The surface impedance is reconstructing by using two different approaches...
This paper presents an idea for designing a planar Lüneburg lens inside a parallel plate waveguide by using an artificial metamaterial surface. In the present article, the surface is realized by a bed of nails. By modulating the heights of the nails, a variable impedance is obtained on one boundary of the parallel plate thus obtaining an equivalent desired refraction index for the guided wave. The...
This paper presents a new type of circularly polarized dielectric-lens antenna designed by using a holographic principle. Prototype design guidelines and simulation results are presented and discussed.
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