Small electrical metamaterial antenna based on coupled electric field resonator with enhanced bandwidth

Abstract

A small electrical metamaterial (MTM) antenna, based on a modified electrical coupled resonator for bandwidth enhancement, is presented. The bandwidth enhancement is achieved using a modified electric coupled (MELC) resonator as the antenna's main radiating element. This modification is achieved using two strip lines placed below a conventional electric coupled (CELC) resonator. The measured impedance bandwidth at −10 dB is 20.7% at a resonance frequency of 2.62 GHz. The design is validated by experimental results, and the proposed antenna is suitable for worldwide interoperability for microwave access (WiMax) applications (2.5-2.69 GHz).

Microstrip slot antenna as an indoor wireless RFID with multiband attributes based on composite right‐hand/left‐hand load

“…In the current article, we have designed antenna with the dimension of 40 × 40 × 3.2 mm 3 , and the antenna size is reduced in comparison with previous works such as the suggested models in Bala et al and Atallah et al 4,14 In addition, the first resonance is obtained 1.95 GHz for this antenna, whereas in Atallah et al, 14 the first resonance has occurred at 1.93 GHz. This means we have reduced the antenna electrically size in comparison to the previous model in Atallah et al 14 Moreover, the slot antennas have been studied with MTM loads in some researches 17,18 with the total size of 40 × 40 mm 2 , and these antenna minimum frequencies are placed at 2.4, 22 2.6, 24 and 2.5 GHz.…”

“…Metamaterial (MTM) is one of the conventional techniques for antenna miniaturization and has been developed in various shapes and techniques such composite right/left hand (CRLH) to provide zeroth-order resonators (ZORs), 2 MTM substrate based on Artificial magnetic materials with Hilbert fractal model to increase effective permeability, 3 and small electrical MTM antenna, based on a modified electrical coupled resonator. 4 T CRLH structures include both right-handed (RH) and the left-handed (LH) properties in the LH structures, the shunt capacitance and series inductance are added to the conventional transmission line (TL), which can affect the phase and velocity of unit cells. 5 This quality has been stablished and promoted in various types of antenna and microwave devices for (a) miniaturization and compact devices (antenna), 6 (b) bandwidth enhancement (antenna), 7 (c) antenna gain enhancement by CRLH unitcells, 8 and (d) multiband application (filter).…”

Liquid metasurface‐based periodically stacked radome design

“…Gain, bandwidth, number of bands, and size of antenna can be improved using metamaterials. The bandwidth of the metamaterial antenna is enhanced using addition of split ring resonators in substrate of patch antenna . While designing radome for radar antenna, the desired gain and bandwidth are usually key parameters .…”

Bandwidth enhancement metamaterial antenna based on transmission line approach

“…Recently, several researchers have been investigated bandwidth enhancement of MTM antennas using zero‐order resonant antennas (ZORAs) using zeroth‐order mode , Although ZORAs offers advantage of size reduction, but they suffers from narrow bandwidth . Bandwidth enhancement method by combining two or more resonant modes have also been reported in . In , bandwidth enhancement was achieved by merging closely spaced zero‐order resonance mode (ZOR) and first‐positive‐order mode (FPOR) on a single pass band with 13% bandwidth enhancement.…”

“…The simulated impedance bandwidth of 30% was obtained by merging first‐negative‐order resonance (FNOR) and ZPOR together. In , the antenna is based on resonant approach where ZOR and POR are merged on a single pass band to extend the bandwidth to 20%.…”