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Metamaterials in application for improving the parameters of antennas

Cao T. N., Krzysztofik W. J.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2018

nr 6

300--303, CD

In this paper, the metamaterials structure and some of its benefits in antenna design are presented. Metamaterials can be applied as defected ground structures, superstrates of antennas to enhance some parameters of the antenna such as bandwidth, gain or reduction in dimension. Depending on the values of permittivity and permeability to classify the metamaterials and apply them in the antenna design for different purposes. The metamaterial antennas are calculated and simulated based on commercial software such as CST Studio, HFSS.

Fractal geometry applied to design of communications systems antennas

Krzysztofik W. J., Cao T. N.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2017

nr 6

206--209, CD

This paper presents the fractal geometries and their application in the design of small, multi-band antennas. Fractals are described by means of Iteration Function System. Some useful pre-fractals were designed, numerically modeled and fabricated for applications in different modern mobile communication systems such as GSM/UMTS, WLAN, GPS, TV-Sat, etc. Experimental verifications well confirmed the results of simulation made by means of HFSS computer code.