A Family of Directive Metamaterial-Inspired Antennas (original) (raw)
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Compact, multifunctional, metamaterial-inspired monopole antenna
2012 6th European Conference on Antennas and Propagation (EUCAP), 2012
In this work, two metamaterial-inspired antennas are studied. The proposed structure consists of a printed dipole antenna with two Split Ring Resonator (SRRs). Good agreement between measured and simulated return losses is obtained. It is shown that the addition of SRRs leads to a multifrequency behavior depending on the size of SRRs and their proximity to the printed dipole.
Efficient, metamaterial-inspired loop-monopole antenna with shaped radiation pattern
2012 Loughborough Antennas & Propagation Conference (LAPC), 2012
A new family of metamaterial-inspired monopole antennas is reported. Split-ring resonator (SRR) is introduced into the near field region of a monopole antenna. Four configurations are proposed by changing the position of the slot of the SRR. In each case, we obtain a new behavior and a new resonance frequency, in addition to that of the monopole. The results are presented for the return loss, efficiency, surface current and radiation pattern. Four prototypes are fabricated and measured. Good agreement between numerical and experimental results is demonstrated.
Analysis of a Compact and Superdirective Metamaterial-Inspired Monopole Antenna
International Journal of Antennas and Propagation, 2014
The directivity of a metamaterial-inspired compact (0.145λ0) monopole antenna was investigated. The proposed structure is composed of a split-ring resonator (SRR) parasitic element placed in the vicinity of a monopole antenna. Two configurations denoted by A1 and A2 were considered depending on the position of the slot in the SRR element. By analyzing simulated and measured results, the superdirectivity (7.5 dBi for A1 and 9 dBi for A2) of the structure was discussed. It is found that the monopole-SRR and/or ground plane-SRR coupling effects may be responsible for the superdirectivity of the structure.
Metamaterial Inspired Square Ring Monopole Antenna for WLAN Applications
2016
─ This paper describes the design of a compact dual band monopole antenna using a metamaterial inspired split ring structure for WLAN (2.4/5.2/5.5 GHz) applications. The antenna is printed on a 20x20x0.8 mm FR-4 substrate. It consists of two concentric square rings with a partial ground plane and is fed by a microstrip line. A split in the outer ring is introduced to induce magnetic resonance which in turn yields a narrow lower band resonance at 2.4 GHz. The position of the split in the ring plays a vital role in inducing the magnetic resonance. The extraction of negative permeability of the ring structure with and without the split is discussed to verify the metamaterial property existence. A prototype of the proposed structure is fabricated and the measured results comply greatly with the simulated results. The antenna has consistent radiation pattern over all the working region. Index Terms ─ Metamaterial, monopole, negative permeability, split ring, WLAN.
Miniaturization of antenna using metamaterial loaded with CSRR for wireless applications
Bulletin of Electrical Engineering and Informatics
This paper proposes a compact decagon antenna for wireless applications based on inspired metamaterial (MTM) loaded with a modified complementary split ring resonator (CSRR). A MTM loaded with CSRR is used to achieve a size reduction of 50% when compared to a traditional antenna. The suggested decagon antenna's ground plane has been loaded with CSRR. The antenna was made on an FR4 substrate with a thickness of 1.6 mm and εr=4.4 and has a very small dimension of 0.288 λ x0.272 λ x0.013 λ (where λ represent center frequency at 2.4 GHz). The given antenna has a 90 MHz bandwidth (2.40-2.50 GHz) with a peak gain of 2.36 dB. The presented design is validated by showing simulated results of the S parameter, VSWR, gain, surface current, and radiation pattern. The proposed antenna is well suited for wireless applications.
Superdirective and low profile metamaterial-inspired antenna
2013 Loughborough Antennas & Propagation Conference (LAPC), 2013
In this paper, a superdirective and low profile metamaterial-inspired antenna is reported. The proposed structure consists of the association of Split-Ring Resonator (SRR) and a monopole. This antenna of ka = 0.65 size works in the UHF band and exhibits a high directivity of 4.41dBi in the matched bandwidth of 25 MHz (-10dB). Simulated and measured results are presented for the return loss and radiation pattern.
Journal of Electromagnetic Waves and Applications, 2010
We demonstrate an electrically small antenna that operates at two modes, which correspond to two orthogonal polarizations. The antenna was single fed and composed of perpendicularly placed metamaterial elements and a monopole. One of the metamaterial elements was a multi split ring resonator (MSRR), and the other one was a split ring resonator (SRR). The elements' physical sizes were the same while the electrical sizes differed nearly by 1 GHz. This variety resulted in the dual mode operation at the 4.72 GHz and 5.76 GHz frequencies. When the antenna operated in the MSRR mode at 4.72 GHz for one polarization, it simultaneously operated for the SRR mode at 5.76 GHz, but for the perpendicular polarization. The efficiencies of the modes were 15% and 40%, and electrical sizes were λ/11.2 and λ/9.5, correspondingly. Finally, we numerically demonstrate the effect of coupling of the two resonators on the operation frequencies.
A miniaturized metamaterial slot antenna for wireless applications
Aeu-international Journal of Electronics and Communications, 2017
A novel miniaturized five band metamaterial inspired slot antenna is reported. The proposed design consists of a ring monopole and metamaterial Rectangular Complementary Split Ring Resonator (RCSRR) as the radiating part, two L and one T-shaped slot as the ground plane, respectively. Miniaturization in the proposed design is accomplished by metamaterial RCSRR, and also, it helps the antenna to operate at 2.9 and 5.2 GHz frequency bands. The aforementioned miniaturization process leads to about 46.8% reduction in volume of the proposed design, as compared to the conventional antenna. The pass band characteristics of the metamaterial RCSRR through waveguide medium are discussed in detail. In order to enhance the operating abilities of the miniaturized antenna, slots are etched out in the ground plane, thereby making the miniaturized antenna further operate at 2.4, 5.6 and 8.8 GHz, respectively. The proposed design has an active patch area of only , with dB bandwidth of about 4.16% (2.35-2.45 GHz), 5.71% (2.63-2.76 GHz), 10.25% (4.44-4.92 GHz), 6.25% (5.42-5.77 GHz) and 2.39% (8.68-8.89 GHz) in simulation, and about 6.86% (2.25-2.41 GHz), 5.01% (2.55-2.7 GHz), 9.16% (4.58-5.02 GHz), 5.38% (5.79-6.11 GHz) and 5.42% (8.44-8.91 GHz) in measurement. The antenna has good impedance matching, acceptable gain and stable radiation characteristics across the operational bandwidths. 1.1. Contributions Although, the antennas reported in the literature provide miniaturization and are multiband in nature, there exists a trade-off between
Design of Metamaterial Based Multilayer Antenna for Navigation/Wifi/Satellite Applications
Progress in Electromagnetics Research M, 2021
Wireless communication plays a vital role in transmitting information from one point to another. Wireless devices have to be smart, intelligent, compact in size, and cost effective to meet the demand of wireless communication. A multi-layered, Split Ring Resonator (SRR), negative permeability material inspired antenna has been designed, analyzed, fabricated, and measured. The developed antenna resonates at 1.13 GHz, 2.47 GHz, and 2.74 GHz frequencies with gain of 3.73 dBi, 6.18 dBi, 1.35 dBi, and bandwidth of 2.10%, 2.81%, and 2.09%, respectively. The structure utilizes FR4 material as a substrate. The engineered model has applications in navigation, WiFi, and satellite communication applications.