Abstract
This paper emphasizes the function of the split ring resonator (SRR) within the design of ultra-wideband (UWB) antennas. We presented an antenna that belongs to the category of UWB antenna with two rejected bands based on square SRR. At first, we presented a UWB antenna. This antenna is designed to operate in the band 2.3–11.5 GHz. Then, with the integration of two SRR cells, we were capable of filtering the bands 3.7–3.9 GHz and 8.7–8.9 GHz without losing the UWB characteristics outside these rejected bands. Next, to ensure the proper performance of the MIMO system, we studied the use of metamaterials in the design of MIMO (Multiple-Input Multiple-Output) antennas for miniaturization and antenna performance.
Highlights
Is prompted the scientific community to study the possibility of breaking technological limits by exploiting the unnatural properties of these metamaterials
The new attractive properties of metamaterials have already opened up a promising avenue for designers of microwave components. Research work on these new materials has intensified in recent years, thanks in particular to progress both in electromagnetic modeling and in the mastery of technological production processes [2, 3]. e path to the development of these new materials remains interesting, even though they require suitable studies to be effectively used with microwave narrowband devices. e main drawback of UWB antennas is the partition of their frequency bands with existing narrowband systems such as WLAN and WiMAX due to their wideband characteristics. erefore, it is important to eliminate interference with neighboring communication systems by using filtering to prevent the transmission or reception of an unwanted signal in a communication system [4]
Based on the filter model studied by [16], a novel UWB antenna structure is designed with two square split ring resonator cells inserted close to the feedline to provide frequency filtering matching WiMAX and WLAN applications in the frequency bands (3.6− 3.8) GHz and (8.7− 8.9) GHz
Summary
Is prompted the scientific community to study the possibility of breaking technological limits by exploiting the unnatural properties of these metamaterials. A row of SRR has the filtering property, and once they are properly polarized, they can perfectly prevent signal propagation, providing an Wireless Communications and Mobile Computing effective way to reject a frequency band near its resonant frequency [8,9,10]. Based on the filter model studied by [16], a novel UWB antenna structure is designed with two square split ring resonator cells inserted close to the feedline to provide frequency filtering matching WiMAX and WLAN applications in the frequency bands (3.6− 3.8) GHz and (8.7− 8.9) GHz. First, we will design a microband antenna working in the band defined by the FCC. E final step is to study the association of the microband antenna with the two SRR cells, the purpose of which is to design a UWB antenna with two rejected frequency bands. We initially started our design with a classic square printed antenna fed through a microstrip line. e choice of the supply line is based on the fact that this line must have a characteristic impedance of 50 Ω and be suitable for a very large band. e geometric structure of the antenna consists of patches printed on the upper face of the FR4 type substrate. e ground plane is a partial plane printed on the lower surface of the substrate
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