Siddig Gomha

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In this paper, two new compact branch-line couplers (BLCs) are proposed. The first is designed and implemented using D-CRLH unit cells made of copper microstrip line. The new design occupies only 52 % of the area of the conventional BLC that operates at 1.8 GHz. The structure has been fabricated and the experimental results have been compared to the(More)
Passive RF/microwave components (e.g. couplers, and filters) occupy big design area in the RF/microwave circuit and systems, especially when it work at low frequencies. This paper presents using of High Temperature Superconductor HTS for reducing the size of circuit design and maintains good performance, the surface impedance model is investigated and(More)
In this paper, the performance of Epsilon Negative Transmission line (ENG) coupler and coupled line coupler with tight coupling have been investigated. The two structures are simulated using two main field simulators HFSS that is based on finite element method FEM, and CST that is based on finite integration technique FIT and one circuit simulator (ADS).(More)
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