Resumo

MARTINEZ ARMAS, Fidel; MORALES ROCHE, Taimir Alain; PORTUONDO MARTINEZ, Edmanuel  e  MARANTE RIZO, Francisco. Dual band microstrip antenna with harmonic suppression for WLAN applications. EAC [online]. 2022, vol.43, n.1, pp.65-80.  Epub 16-Jun-2022. ISSN 1815-5928.

This article proposes the design and simulation of a microstrip antenna with circular polarization in two frequency bands 2.4GHz and 5.2GHz, suppressor of the second and third harmonics of the fundamental frequencies through the use of metamaterials, using a microstrip power line and the grooved ground plane.

A study of the main techniques to suppress harmonics was carried out. Among the most innovative are the insertion of metamaterials, these structures present novel properties in the area of traditional electromagnetism. Such properties have allowed the design of microwave antennas with new radiation characteristics that have served as the main stimulus to develop this research.

Circular polarization is achieved in both frequency bands throught asymmetric slots and optimized by introducing disturbances in the radiating structure. With the proposed design, a miniturization of the dimensions of the antenna is obtained, gains of approximately 3.00dB in the two frequencies of interest, coupling bandwidths and circular polarization of 364 MHz in 5.2GHz, which represents 15%, 16 % and 11.57% respectively, enough to cover the requirements of WLAN applications. The entire design, simulation and optimization process was carried out in the CST Studio Suite 2017 software.

Palavras-chave : Multiband; Metamaterials; Harmoincs; Microstrip; WLAN (Wireless Local Area Network).

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