Browsing by Author "Ibrahim A.A."

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Building a zero-order BPF with CRLH transmission lines
(PENTON MEDIA, 2018) Abdalla M.A.; Hassan A.Y.; Ibrahim A.A.; Electronic Engineering Department; MTC College; Cairo; Egypt; Electronics and Communications Department; MSA University; Giza; Egypt; Communications and Electronics Department; Faculty of Engineering; Minia University; Minia; Egypt; University Oierre and Marie Curie; Sorbonne University; Paris VI; France
Miniaturization of RF/microwave filters helps pave the way to developing smaller wireless devices for internet access. Using metamaterials and circuit structures such as composite-right-left-handed (CRLH) resonators has proven effective in shrinking RF/microwave filter circuits and was demonstrated in the design of a compact bandpass filter (BPF) well-suited for WiMAX wireless applications. � 2018, PENTON MEDIA. All rights reserved.
Compact high selective DGS band-pass filters for WLAN applications
(Institute of Electrical and Electronics Engineers Inc., 2017) Rashad M.K.; Ashraf M.; Daw A.F.; Ibrahim A.A.; Faculty of Engineering; MSA University; Cairo; Egypt; Faculty of Engineering; Minia University; Elminia; Egypt
In this paper, compact size band pass filters are proposed and designed for WLAN applications. The coupled DGS resonators are considered the main block of proposed band pass filters. The three proposed filters are designed by using the same defected ground structure shape, but with different feed line configurations. The feed line configuration affects the presence of transmission zeros in the rejection band to enhance the filter selectivity. So, we proposed three designs based on the different feed line configuration. The first design is band pass without transmission zero, the second is with one transmission zero, and the last one is band pass with two transmission zeros. In general, the three band pass filters are designed to operate from 5 GHZ to 6 GHZ with a central frequency of 5.5 GHZ, return loss higher than 25 dB and a wide stop band rejection up to 10 GHz with level lower than 30 dB, and an insertion loss lower than 0.5 dB is achieved within pass band. The simulated results are presented to show the performance of these filters. � 2017 IEEE.
High selective SRR-based narrow band filter with 0° feed structure
(Institute of Electrical and Electronics Engineers Inc., 2018) Fouda Z.K.; Ibrahim A.A.; Abdalla M.A.; Electrical Systems Engineering Department; October University for Modern Sciences and Arts; Giza; Egypt; Electronic Engineering Department; El-Minia University; El-Minia; Egypt; Electronic Engineering Department; Military Technical College (MTC); Cairo; Egypt
The design of two band pass metamaterial filters with high selectivity based on the coupling matrix technique is presented. The design methods discussed below are applied to metamaterial split ring resonators (SRRs) of second order but of differing feed structure. The high selectivity requirement of the second proposed filter is fulfilled through the use of a 0� feed structure which furnishes the filter response with two transmission zeros. The proposed band pass filters are devised to adhere to wireless LAN application requirements with a center frequency of 2.4 GHz. Both the simulated and measured results of the proposed filters show an insertion loss below 0.7 dB within the pass band range. The final proposed filter boasts a compact size of only 3 ? 2 cm2 due to the use of SRRs. � 2018 IEEE.
Planar uwb antenna includes two notches
(PENTON MEDIA, 2018) Ibrahim A.A.; Boghdady M.M.; Electromagnetic Waves Group; Electrical Engineering Department; Minia University; El-Minia; Egypt; University Pierre and Marie Curie; Sorbonne University; Paris VI; France; Faculty of Engineering; MSA University; Cairo; Egypt
This compact UWB antenna includes two frequency notches for suppression of interference occurring in WiMAX and WLAN frequency bands without the addition of filters. 2018, PENTON MEDIA. All rights reserved.