Abstract
Abstract In this article, a circular patch microstrip antenna with a metamaterial resonator for 4G applications is proposed. For the design of the circular antenna patch, an approximate calculation was performed. The circular resonator is inserted into the patch for some antennas, in different positions for a parametric study. When incorporating the resonator, the performance of the antenna is improved and analyzed through some parameters, when compared with the antenna without the resonator. To verify the influence of the resonator and validate its performance, simulated results were performed with the ANSYS HFSS® software and compared with the experimental results, through prototypes, in which they showed a good agreement.
Highlights
Microstrip antennas in the field of wireless communication systems, require attractive features and properties, such as thin surface, light weight, easy to manufacture and to integrate with existing communication devices [1]
CSRR DESIGN The MTM structure called Complementary Split Ring Resonator (CSRR) was proposed by Pendry based on SRR geometry, these two geometries being the most explored by researchers, since they have resonant elements and provide a high quality factor in the frequencies of microwaves and CSRR is produced by etching ring-shaped grooves on the metallic part of the upper or lower surface of microstrip antena substrate, and its electrical and magnetic properties are exchanged in relation to the SRR
Based on the MTM CSRR geometry presented in the literature, the resonator for this work was designed and defined empirically by means of computer simulations, until obtaining a good agreement with the microstrip antenna patch design
Summary
Microstrip antennas in the field of wireless communication systems, require attractive features and properties, such as thin surface, light weight, easy to manufacture and to integrate with existing communication devices [1]. The use of MTMs reduces the size of the antenna, but it can improve other parameters, such as increased bandwidth (BW), gain, radiation diagram, multiband frequencies of operation, in addition to contributing to the application of sensors, reducing absorption electromagnetic, as well as harmonic filter [2] - [6]. In [14], it was proposed a Rectangular MTM Complementary Split Ring Resonator (RCSRR), contributing to the antenna miniaturization, good impedance matching, gain and bandwidth. In [16], an antenna with an MTM matrix in Hexagonal Complementary Split Ring Resonators (CSRRs) was used to evaluate the frequency response and radiation performance of the antenna. The simulated and experimental results were investigated through the parameters of return loss (RL), bandwidth (BW), radiation diagram, gain, Smith chart graphic and current distribution
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