Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Hum, Sean V."'
Design of Rim-Located Reconfigurable Reflectarrays for Interference Mitigation in Reflector Antennas
Radio telescopes are susceptible to interference arriving through its sidelobes. If a reflector antenna could be retrofitted with an adaptive null steering system, it could potentially mitigate this interference. The design of a reflectarray which ca
Externí odkaz:
http://arxiv.org/abs/2305.18199
Electromagnetic linear-to-circular polarization converters with wide- and multi-band capabilities can simplify antenna systems where circular polarization is required. Multi-band solutions are attractive in satellite communication systems, which comm
Externí odkaz:
http://arxiv.org/abs/2207.04019
Electromagnetic metasurfaces have attracted significant interest recently due to their low profile and advantageous applications. Practically, many metasurface designs start with a set of constraints for the radiated far-field, such as main-beam dire
Externí odkaz:
http://arxiv.org/abs/2204.00433
We present the end-to-end design of compact passive and lossless metasurface (MTS) antennas with integrated feeds. The complete low-profile system consists of a single-layered reactive impedance MTS printed on top of a grounded dielectric substrate,
Externí odkaz:
http://arxiv.org/abs/2112.12700
We present a highly efficient metagrating-assisted antenna (MGA) architecture with a simple integrated feed. Power from a localized line source is distributed throughout the arbitrarily large antenna aperture with the help of a passive and lossless e
Externí odkaz:
http://arxiv.org/abs/2110.13000
In this paper, a generalized macromodeling approach is presented to simulate complex electromagnetic (EM) surfaces consisting of unit cells with connected conductors. Macromodels of each unit cell are produced by applying the equivalence principle on
Externí odkaz:
http://arxiv.org/abs/2107.13523
Electromagnetic metasurface design based on far-field constraints without the complete knowledge of the fields on both sides of the metasurface is typically a time consuming and iterative process, which relies heavily on heuristics and ad hoc methods
Externí odkaz:
http://arxiv.org/abs/2105.14133
Autor:
Pearson, Stewart, Hum, Sean V.
Electromagnetic metasurfaces offer the capability to realize almost arbitrary power conserving field transformations. These field transformations are governed by the generalized sheet transition conditions, which relate the tangential fields on each
Externí odkaz:
http://arxiv.org/abs/2011.09016
Publikováno v:
Phys. Rev. B 102, 245305 (2020)
We present methods for analyzing and designing cylindrical electromagnetic metasurfaces with non-circular cross sections based on conformal transformations. It can be difficult to treat surfaces with non-canonical geometries since they generally do n
Externí odkaz:
http://arxiv.org/abs/2010.12625
Autor:
Naseri, Parinaz, Hum, Sean V.
The synthesis of a metasurface exhibiting a specific set of desired scattering properties is a time-consuming and resource-demanding process, which conventionally relies on many cycles of full-wave simulations. It requires an experienced designer to
Externí odkaz:
http://arxiv.org/abs/2008.02074