Browsing by Author "Fouda Z.K."

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    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.
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    An ultra wide band filter with high selective dual notching
    (Institute of Electrical and Electronics Engineers Inc., 2017) Hammad Y.T.; Fouda Z.K.; Abdalla M.A.; Electrical Systems Engineering Department; October University for Modern Sciences and Arts; Giza; Egypt; Electronic Engineering Department; MTC College; Cairo; Egypt
    This paper introduces an ultra-wide band (UWB) band pass filter (BPF) with a coupled T-shaped stub. The filter's lower cut-off frequency and higher cut-off frequency are around 3.2 GHz and 9.7 GHz respectively. Moreover, the pass band exhibits two narrow notches at 5.9 GHz and 7.8 GHz which minimize the interference effects of the proposed filter with both the wireless local area network (WLAN) and SATCOM systems, respectively. The main pass band of the filter and the upper notch are implemented using a stepped impedance resonator, coupled with an inter-digital feeding line backed by defected ground structures (DGS) for coupling augmentation. The lower notch band is implemented using a stepped impedance stub that is grounded through a via hole at one end and coupled to the main filter form at the other end. The proposed filter features a small size of 0.443�1.534 ?g2. � 2017 IEEE.