A dual-element and a four elements low-cost multiple-input-multiple-output (MIMO) antenna are introduced in this paper. It achieves a bandwidth (BW) of 25 GHz (22-45 GHz) and 35 GHz (22- 60 GHz) respectively, and the VSWR is less than 2 for both configurations. The proposed antennas average isolation of 20 dB over the entire operating band, and a peak realized gain of 7.6 dBi for the dual element antenna and 7.59 dBi for the four-element antenna, which are suitable for ultra-wideband at K/Ka/Q/U/V bands Applications.
Metamorphic virus employs code obfuscation techniques to mutate itself. It absconds from signaturebased detection system by modifying internal structure without compromising original functionality. In this paper, we propose a new method, for detecting metamorphic computer viruses, that is based on the technique of Case-Based Reasoning (CBR). In this method:-Can detect similar viruses with high probability.
A novel dual-band multipolarization slotted patch antenna with a single-layer substrate and one feeding port for C-band applications is presented. The measured results show that impedance bandwidth in which return loss is less than −10dB is from 5.7 GHz to 6.1 GHz and from 7.5 GHz to 7.8 GHz. The Axial Ratio (AR) of the antenna is < 3dB and allows the both right-handed (RH) and left-handed (LH) circular polarized (CP) from 7.6 GHz to 7.8 GHz and from 7.5 GHz to 7.6 GHz for linear-polarization. The radiation pattern is quasi-directional on the greater part of the working band. The software CST Microwave studio is used for simulation which results are in great agreement with the measured parameters. The proposed antenna can be used in occasions where the antennas need to have dual band and multi-polarization for its advantages of compact structure and low cost.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.