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DEVELOPMENT OF LOW COST ANTENNAS USING COAXIAL CABLES

Ribeiro, L. ; Santos, P. ; Silveira, Tagleorge M. ; Marconi, K. ; Iano, Y. ; Campos, D.

DEVELOPMENT OF LOW COST ANTENNAS USING COAXIAL CABLES, Proc 1. INTERNATIONAL HASANKEYF SCIENTIFIC STUDIES AND INNOVATION CONGRESS, Batman, Turkey, Vol. ISBN: 978-625-8007-59-6, pp. 529 - 529, November, 2021.

Digital Object Identifier: 10.13140/RG.2.2.24225.89446

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Abstract
The work performed presents the results obtained in the execution of the project whose main objective was to
investigate and evaluate the feasibility of using a coaxial cable of the CELLFLEX ½¨ model for the
development of a low-cost antenna with application focused on 5G technology that, it was initially chosen to
operate in a 3.5GHz frequency band. To carry out the computer simulations using the commercial software
CST STUDIO SUITE, rectangular geometry openings were made in the center of the coaxial cable, in order
to analyze the behavior of the radiated field through the opening from 𝛌/2, which corresponds to half the
wavelength in relation to the frequency of interest to be analyzed, given by Babinet's Principle. From then
onwards, some variations were made in the dimensions of the aperture, thus observing its response to the
radiated field, in the case of the reflected wave, as a function of the applied frequency. Thus, a computational
modeling of an antenna of the aperture antenna type (or slots) was performed, where in each simulated result
the gain and bandwidth that would meet the characteristics of a practical application antenna were verified. A
205.4 MHz bandwidth was obtained considering for a reflection coefficient of a commercial antenna, from -
5dB, a reflection coefficient of -12.755 dB for the exact 3.5 GHz, with a deviation for a coefficient of
maximum reflection of –43.88 dB for 3.522 GHz. In other words, it is concluded that the result obtained
meets the requirements of an antenna, and in particular having applicability for the 5G technology which is of
great importance in the application for use wireless internet, which can be used in buildings and tunnels to
take advantage of and at the same time add its spatial arrangement, thus allowing the various wireless internet
signal points.