In this study, one method of using antennas based on fractals to cover few kinds public protection and disaster relief (PPDR) communications was presented. Dedicated antenna forms, necessary for design by 5G implementation, were enhanced suit the requirements specific applications. Employing fractal-shaped have allowed us accomplish all these actions, which request compact, conformal, broadband...

in the classification of traditional domes, they are divided into two main categories: “roc” (cone-shaped) and “nār” (hemisphere-like) domes. urchīn domes are a sub-category of cone-shaped domes which were common in the past in the region of mesopotamia and southwest of iran. the fractal geometry is the best way to describe the geometrical structure of these domes, because the existence of self...

There has been an ever growing demand for antenna designs that possesses compact size, low profile and multiband features. Recently the possibility of developing antenna designs that exploit in some way the properties of fractals to achieve these goals, at least in part, has attracted a lot of attention. Fractal antennas have useful applications in cellular telephone and microwave communication...

An optimization-based methodology for the design of miniaturized microstrip gives an automated process for generation of antenna geometrical parameters and mainly associated with Particle Swarm Two software programs are used in parallel, and in a coupled synchronized fashion. The first one is the electromagnetic simul Microwave Studio which gives instantaneous estimation of the antenna performa...

Abstract—A miniaturized printed log-periodic fractal dipole antenna is proposed. Tree fractal structure is introduced in an antenna design and evolves the traditional Euclidean log-periodic dipole array into the log-periodic second-iteration tree-dipole array (LPT2DA) for the first time. Main parameters and characteristics of the proposed antenna are discussed. A fabricated proof-of-concept pro...

The transmission spectrum of fractal polyadic Cantor superlattice exhibits sharp peaks within forbidden frequency gaps. This property has been exploited by placing such self-similar multi-slab structure in the far field radiation region above a radiating element such as a patch antenna to maximize its directivity at the corresponding transmission peak. A patch antenna having directivity of 30 d...

The irregularity has been very attractive to the antenna and packaging engineers. More specifically, the self-similarity has inspired many researchers to use them for broadband designs, due to the fact that a fractal antenna is a repeated shape in different scales, which can be interpreted as a multiscale (“multi-wavelength”) radiator. In addition to this, the space filling property seems to be...

The present paper analyses and documents the merits of incorporating fractal design in microstrip antenna intended to be mounted on and integrated into the design of smart vehicles. A novel design is proposed for a compact tri-band hexagonal microstrip antenna to be integrated with the body of a smart vehicle for short range communication purpose in an Intelligent Transport System (ITS). This a...

In this paper, a compact multiple-input-multiple-output (MIMO)/diversity antenna with WLAN band notch characteristics, high isolation, and good ECC suitable for portable ultra-wideband (UWB) applications is presented. The proposed antenna has optimized dimensions of 29mm× 38mm. The antenna consists of two orthogonal circular monopoles with a 50Ω microstrip feed line. In addition, to enhance the...