A
Abbas Omar
Researcher at Otto-von-Guericke University Magdeburg
Publications - 338
Citations - 3554
Abbas Omar is an academic researcher from Otto-von-Guericke University Magdeburg. The author has contributed to research in topics: Microstrip & Band-pass filter. The author has an hindex of 28, co-authored 335 publications receiving 3353 citations. Previous affiliations of Abbas Omar include University of Delhi & Czech Technical University in Prague.
Papers
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Control of bandstop response of Hi-Lo microstrip low-pass filter using slot in ground plane
TL;DR: In this paper, the effect of the geometrical shapes of a defected groundplane structure (DGS) slot on performance of the Hi-Lo microstrip low-pass filter (LPF) was examined.
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Some important properties of waveguide junction generalized scattering matrices in the context of the mode matching technique
TL;DR: In this paper, the generalized scattering matrix (S) of waveguide step discontinuities is derived by considering the conservation of the complex power and self reaction across the discontinuity, which is useful for the numerical verification of the mode matching technique when designing waveguide circuits.
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Quasi-Elliptic Microstrip Low-Pass Filters Using an Interdigital DGS Slot
TL;DR: In this paper, a DGS slot with an interdigital shape was introduced, where the resonant frequency of the slot can be easily controlled by changing the length of the metal fingers without changing the area taken by the structure.
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Transmission Matrix Representation of Finline Discontinuities
Abbas Omar,K. Schonemann +1 more
TL;DR: In this article, a general treatise of cascaded discontinuities in inhomogeneous waveguides is given and applied to finline circuits, where a transmission matrix representation is superior to a scattering matrix representation as far as CPU time is concerned.
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A Study of Wireless Indoor Positioning Based on Joint TDOA and DOA Estimation Using 2-D Matrix Pencil Algorithms and IEEE 802.11ac
Abdo Gaber,Abbas Omar +1 more
TL;DR: A non-iterative hybrid least square estimator has been presented to estimate the mobile unit (MU) coordinates based on the time difference of arrival (TDOA) and DOA estimates, which is a robust estimator against channel fading and low signal-to-noise ratio (SNR).