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We demonstrate that an integrated lens antenna (ILA) with a double lens (DL) focusing system can provide simultaneously a high broadside directivity and a low scan loss over a wide angular range. The proposed DL ILA system consists of a hemispherical substrate lens and a planoconvex objective lens. A prototype of a high-gain DL ILA with lenses made of a low permittivity dielectric material is fabricated...
The efficiency of the approach described in the paper is provided thanks to the following three factors: (i) compact form representation of a primary feed with a given radiation pattern simulated by a combination of complex dipoles, (ii) hybridization of genetic and steepest descent gradient algorithms, and (iii) smart encoding schemes used for storing parameters of the array antennas implemented...
Paper describes designing procedure of dielectric lens antennas (DLA) for multibeam applications. Two configurations of DLAs are considered, namely: two-shell circularly-layered lens excited by a horn antenna and shaped homogeneous flat-bottom lens excited by an array of printed feeds. Synthesis of the antennas is carried out in the 2-D formulation using highly-efficient in-house softwares based on...
Paper describes the electromagnetic performance of compact-size dielectric lenses typically used as building blocks for integrated lens antennas operating at the microwave to optical ranges. Three configurations of lenses are studied, namely: multi-shell spherical, extended hemielliptical, and shaped ones. Although lenses are usually considered as wideband devices whose operation principles are based...
The paper describes a procedure for designing two-shell circularly-layered dielectric lens antennas (DLA) with radiation characteristics compatible with conventional multi-layer uniformly-layered Luneburg lens (LL) antennas. It is demonstrated that a two-shell lens with the favorable collimating capabilities can be designed using standard low-permittivity materials provided the proper selection of...
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