A Metasurface Radar Monopulse Antenna
نویسندگان
چکیده
This article presents the design, fabrication, and testing of a modulated metasurface (MTS) antenna for monopulse radar tracking at Ka-band. The consists circular, thin grounded dielectric layer printed by texture metallic patches in shape size. patch can be modeled as spatially variable capacitive impedance sheet, which together with slab contribution provides an overall, modulated, inductive boundary condition (BC). aperture is divided into four identical angular quadrants each them radiating independent broadside beams when excited individual monopole launcher. Each launchers excites TM cylindrical surface wave (SW), progressively converted leaky-wave (LW) MTS. subapertures are virtually separated properly designing MTS modulation. To this end, LW attenuation constant calibrated dumping sufficiently SW, thus preventing interaction between adjacent regions. Therefore, structure not delimited any physical separation, but only continuous change equivalent BCs. monopulse-type linearly polarized $\Sigma $ , notation="LaTeX">$\Delta \Delta _{\mathrm{ E}}$ H}}$ obtained combining source excitation simple phasing scheme. Notably, solution does affect overall lightness, low profile, feed simplicity, fabrication cost structure, constitutes inherent advantage respect to more traditional waveguide-based solutions.
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ژورنال
عنوان ژورنال: IEEE Transactions on Antennas and Propagation
سال: 2022
ISSN: ['1558-2221', '0018-926X']
DOI: https://doi.org/10.1109/tap.2021.3137206