A novel printed octagonal fractal microstrip antenna with semi-elliptical ground plane is presented for ultra wide band applications. The proposed antenna has a compact size of 20×20×1 mm³. The measured result of the antenna exhibits the ultra wide band characteristics from 2/9 to 14/2 GHz. In this paper, reducing antenna’s size by 35%, the same results were achieved, while small dimension frac...

A modified circular patch antenna design has been proposed in this paper, the bandwidth of this antenna is optimized using the genetic algorithm (GA) based on fuzzy decision-making. This design is simulated with HP HFSS Program that based on finite element method. This method is employed for analysis at the frequency band of 1.4 GHz- 2.6 GHz. It gives good impedance bandwidth of the order o...

Ultramassive multiple-input, multiple-output (MIMO) is one of the key enablers in forthcoming 6G networks to provide high-speed data services by exploiting spatial diversity. In this article, we consider a new paradigm, termed holographic radio for ultramassive MIMO, where numerous tiny and ine...

In this article, we present a new design of a coplanar waveguide fed (CPW-fed) ultra-wideband (UWB) antenna with dual band-notched characteristics. Two notched frequency bands are achieved by using two inverted U-shaped stepped impedance resonators. The proposed antenna can operate from 2.82 to 11 GHz (118%), defined by VSWR< 2, except two notched bands around 3.5 GHz (WiMAX) and 5.5 GHz (WLAN)...

In a realistic wireless environment, the multi-antenna channel usually exhibits spatially correlated fading. This is more emphasized when large number of antennas densely deployed, known as holographic massive MIMO (multiple-input multiple-output). first part this letter, we develop model for by considering both non-isotropic scattering and directive antennas. With antennas, it difficult to obt...

In this work, a system able to monitor the crowd density detecting mobile phone communications through analysis of electromagnetic spectrum is proposed and experimentally assessed. The variations are collected with low-cost analyzer, high gain log-periodic directive antenna (LPDA). objective relate spectral power in given frequency band estimate connections present number people area. particula...

Recently, the super-oscillation phenomenon has attracted attention because of its ability to super-resolve unlabelled objects in far-field. Previous synthesis super-oscillatory point-spread functions used Chebyshev patterns where all sidelobes are equal. In this work, an approach is introduced generate Taylor-like that have tapered sidelobes. The proposed method based on Schelkunoff’s super-dir...

Multiple-input multiple-output (MIMO) technique is one of the most promising solutions for increasing reliability and spectral efficiency of the radio connection in future mobile communication systems. The performance potential of MIMO systems is well established from theoretical point of view. However, much effort is still needed in the experimental verification of those systems using realisti...

in this paper, a novel directional super wide band micro strip antenna based on a simple and new geometry has been proposed. the antenna exhibits the widest bandwidth ever reported to the authors’ knowledge from 50 ghz to 200 ghz. its radiation pattern is approximately steady in the frequency ranges of 50 ghz to 200 ghz. the antenna consists of a club-like radiating patch, a combination of thre...