Optical sensors have wide range of application such as in medicine, astronomy, industry, and others. Sensitivity of symmetric three layered optical waveguide sensor is investigated. The proposed sensor consists of dielectric slab surrounded by metamaterial (MTM) cladding and MTM substrate. MTMs are new artificial materials which have simultaneously negative permittivity ε and negative permeabil...

This paper introduces a decagonal C-shaped complementary split-ring resonator (CSRR) textile-based metamaterial (MTM). The overall size of the proposed sub-wavelength MTM unit cell is 0.28λ0 × 0.255λ0 at 3 GHz. Its stopband behaviour was first studied prior analysing negative index properties MTM. It worth noting that in this work unique way experiments were completed. For both simulations and ...

A miniaturized antenna employing a negative index metamaterial with modified split-ring resonator (SRR) and capacitance-loaded strip (CLS) unit cells is presented for Ultra wideband (UWB) microwave imaging applications. Four left-handed (LH) metamaterial (MTM) unit cells are located along one axis of the antenna as the radiating element. Each left-handed metamaterial unit cell combines a modifi...

1 CSIR-NAL, Bangalore, India 2 CSIR-NAL, Bangalore, India Abstract The exciting features of metamaterial in conjunction with transformation optics leads to various applications in the microwave regime with such examples as invisible cloak, frequency selective surfaces (FSS), radomes, etc. The concept of electromagnetic invisibility is very much important in aerospace platform. Hence to study th...

This paper presents a compact antenna based on two different metamaterial resonators, the E-shape resonators and interdigital suitable for biomedical implant applications. The proposed antennas operate in industrial, scientific, medical (ISM) bands frequency band of 2.4–2.5 GHz. integration (MTM) into design led to reduced size these gaining enhancement. overall is $$8\times 7\times 1.27{\mathr...

In this paper, a symmetrical monolayer metamaterial superstrate is placed on microstrip patch antenna resonant at 3.5 GHz. MTM based CSRR Complementary Split Ring Resonators, constituting two rectangular rings opposite splits both ends, which are printed Rogers RT 5880 type substrate with relative permittivity of 2.2, tangential loss 0.0009, and thickness 0.508mm. This resonator capable exhibit...

The adoption of wireless charging technologies for consumer and industrial applications is inhibited by concerns over reliability culminating from the fluctuating output power, low transmit power transfer efficiency (PTE) these systems. Besides, inherently high radio microwave resonant frequency existing Metamaterial (MTM) designs imposes switching stress on switches passive components, leading...

This paper presents a miniaturized planar dual-band short-ended metamaterial antenna with the backed ground plane to improve bandwidths and radiation characteristics. The proposed (MTM) has been made up of composite right- or left-handed transmission line (CRLH-TL) concept. Here, employed generate an extra coupling capacitance (CC), which shifts ZOR frequency in lower band while also improving ...

In this study, a novel broadband metamaterial (MTM) absorber is proposed, which based on vanadium dioxide (VO 2 ) resonators coated onto flexible polyamide substrate. The VO resonator in the form of quatrefoil and circle-loaded complementary square split ring (CSSRR), fine tuned to operate terahertz range. MTM design simulation were carried out using Computer Simulation Technology (CST) softwar...

A non-invasive, low-powered, and portable electromagnetic (EM) head imaging system is presented using metamaterial (MTM) loaded compact directional 3D antenna. The antenna consists of two slotted dipole elements with 2×3 3×3 finite MTM array in top ground, respectively, folded parasitic that operate within the frequency range 1.12 GHz to 2.5 GHz. are optimized enhance overall performance regard...