Search

Your search keyword '"Jalil Rashed M"' showing total 2 results
Start Over Author "Jalil Rashed M"
2 results on '"Jalil Rashed M"'

1. Novel Reflection-Only Method for Electromagnetic Characterization of Isotropic Dispersive Materials

Author

Mohammad Baharian, Jalil Rashed M, Maryam Hasheminasab, and Ahmed A. Kishk

Subjects
Permittivity, Materials science, Acoustics, 020208 electrical & electronic engineering, Isotropy, Physics::Optics, 020206 networking & telecommunications, 02 engineering and technology, Lossy compression, Physics::Classical Physics, law.invention, Characterization (materials science), law, 0202 electrical engineering, electronic engineering, information engineering, Reflection (physics), Reflection coefficient, Waveguide
Abstract

A new reflection only method for electromagnetic characterization of PEC-backed material is proposed. By exploiting waveguide high-order modes, this method can retrieve permittivity and permeability of dispersive and lossy materials. In contrast to similar researches, this method is mathematically simple and easy to implement. An example of retrieving/retrieval electromagnetic parameters of a dispersive material is carried out to show the applicability of the method.

Published
2021
Full Text
View/download PDF

2. A Reciprocity Method of Analysis for Gap Waveguide Slot Antennas

Author

Mohammad D. Motevalli, Keyvan Forooraghi, and Jalil Rashed Mohassel

Subjects
Artificial magnetic conductor, asymptotic boundary condition, gap waveguide slot antenna, ridge gap waveguide, spectral domain approach, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

This paper introduces analytical solutions to gap waveguide slot antenna structures. The reciprocity method is used for the analysis by exploiting Green’s function of a bed of nails structure employing a homogenized plane-wave spectral-domain approach. Green’s function is found using parallel plate waveguide and surface admittance concepts. The spectral surface admittance of the pin structure is calculated using asymptotic boundary condition (ABC), and the unknown antenna slot currents are solved using moment methods. The structure is designed to have a cutoff frequency of 10–15 GHz, and the central operating frequency of the slot is 12.5 GHz. This approach is applied to the specific geometry of a propagating ridge gap waveguide single transverse broad wall slot antenna structure. The equivalent series impedance and far zone fields and patterns are calculated, and the results are compared with a full-wave commercial software, and they are proved to be accurate.

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results