In this paper, a new approach for the development of planar metamaterial structures is developed. For purpose, split-ring resonators (SRRs) and complementary (CSRRs) coupled to transmission lines are investigated. The electromagnetic behavior these elements, as well their coupling host line, studied, analytical equivalent-circuit models proposed isolated SRRs/CSRRs. From models, stopband/passband characteristics analyzed SRR/CSRR loaded derived. It shown that, in long wavelength limit,...

The electromagnetic theory of diffraction and the Babinet principle are applied to design artificial metasurfaces metamaterials. A new particle, complementary split rings resonator, is proposed for with high frequency selectivity planar metamaterials a negative dielectric permittivity. Applications in fields selective surfaces polarizers, as well microwave antennas filter design, can be envisaged. tunability all these devices by an dc voltage also achievable if particles etched on...

In this letter a super-compact stopband microstrip structure is proposed. The frequency gap produced by an array of complementary split ring resonators (CSRRs)-a concept proposed here for the first time-etched on ground plane. This behavior interpreted as due to presence negative effective dielectric permittivity in vicinity resonance. resulting device produces deep rejection band with sharp cutoff, and pass that exhibits very low losses good matching. Due sub-lambda operation CSRRs,...

The new era of mobile health ushered in by the wide adoption ubiquitous computing and communications has brought opportunities for governments companies to rethink their concept healthcare. Simultaneously, worldwide urbanization process represents a formidable challenge attracts attention toward cities that are expected gather higher populations provide citizens with services an efficient human manner. These two trends have led appearance smart cities. In this article we introduce health,...

In this letter, a planar left-handed propagating medium consisting of coplanar waveguide (CPW) inductively coupled to split ring resonators (SRR) and periodically loaded with narrow metallic wires is proposed. The make the structure behave as microwave plasma negative effective permittivity which covers broad frequency range. permeability required achieve wave propagation provided by rings in vicinity their resonant frequency. result allows band. transmission coefficient measured fabricated...

Nowadays synthetic aperture radar (SAR) and multiple-input-multiple-output (MIMO) antenna systems with the capability to radiate waves in more than one pattern polarization are playing a key role modern telecommunication systems. This is possible use of arrays as they offer advantages high gain beamforming capability, which can be utilized for controlling radiation electromagnetic (EM) interference immunity wireless However, growing demand compact array antennas, physical footprint needs...

In this review paper, a comprehensive study on the concept, theory, and applications of composite right/left-handed transmission lines (CRLH-TLs) by considering their use in antenna system designs have been provided. It is shown that CRLH-TLs with negative permittivity (ε <; 0) permeability (μ unique properties do not occur naturally. Therefore, they are referred to as artificial structures called "metamaterials". These include series left-handed (LH) capacitances (C <sub...

A novel compact stop band filter consisting of a 50 /spl Omega/ coplanar waveguide (CPW) with split ring resonators (SRRs) etched in the back side substrate is presented. By aligning SRRs slots, high inductive coupling between line and rings achieved, result sharp narrow rejection vicinity resonant frequency rings. In order to widen filter, several pairs tuned at equally spaced frequencies within desired gap are cascaded. The response measured fabricated prototype device exhibits pronounced...

The main aim of this paper is to demonstrate the potentiality sub-wavelength resonators, namely, split-ring complementary and related structures suppression undesired spurious bands in microwave filters, a key aspect improve their rejection bandwidths. relevant characteristics cited resonators are dimensions (which can be much smaller than signal wavelength at resonance) high-Q factor. This allows us design stopband with significant levels, few stages, small dimensions, which integrated...

In this letter, spurious passband suppression in microstrip coupled line band pass filters by means of split ring resonators (SRRs) is demonstrated for the first time. By etching SRRs upper substrate side, close proximity to conductor strip, strong magnetic coupling between and rings arises at resonant frequency SRRs. This inhibits signal propagation vicinity that frequency, allowing rejection undesired passbands properly tuning To test novel technique, we have designed fabricated two...

A complementary split ring resonator (CSRR)-based metallic layer is proposed as a route to mimic surface plasmon polaritons.A numerical analysis of the textured carried out and compared previous prominent topologies such metal mesh, slit array, hole Sievenpiper mushroom surfaces, which are studied well from transmission line perspective.These well-documented geometries suffer narrowband response, alongside, in most cases, thickness constraint (usually order λ/4) non-subwavelength modal size...

A decoupling metamaterial (MTM) configuration based on fractal electromagnetic‐bandgap (EMBG) structure is shown to significantly enhance isolation between transmitting and receiving antenna elements in a closely‐packed patch array. The MTM‐EMBG cross‐shaped assembly with fractal‐shaped slots etched each arm of the cross. fractals are composed four interconnected‐‘Y‐shaped’ that separated an inverted‐‘T‐shaped’ slot. placed individual antennas 2 × Measured results show average inter‐element...

A novel deterministic approach to model the radio wave propagation channels in complex indoor environments reducing computational complexity is proposed. This technique combines a neural network and 3-D ray launching algorithm order compute wireless channel performance scenarios. An example of applying method for studying presented results are compared with very high resolution fully simulation as reference solution. The new allows use lower number launched rays scenario whereas intermediate...

This paper presents an intelligent streetlight management system based on LED lamps, designed to facilitate its deployment in existing facilities. The proposed approach, which is wireless communication technologies, will minimize the cost of investment traditional wired systems, always need civil engineering for burying cable underground and consequently are more expensive than if connection different nodes made over air. deployed solution be aware their surrounding's environmental...

This paper presents a study of planar antenna-array inspired by the metamaterial concept where resonant elements have sub-wavelength dimensions for application in microwave medical imaging systems detecting tumors biological tissues. The proposed antenna consists square-shaped concentric-rings which are connected to central patch through common feedline. array structure comprises several antennas that arranged surround sample breast model. One at time is used transmission-mode while others...

Abstract This paper presents the results of a study on improving performance parameters such as impedance bandwidth, radiation gain and efficiency, well suppressing substrate loss an innovative antenna for on-chip implementation millimetre-wave terahertz integrated-circuits. was achieved by using metamaterial substrate-integrated waveguide (SIW) technologies. The structure comprises five alternating layers metallization silicon. An array circular patches with metamaterial-inspired...

This letter investigates the feasibility of designing a high gain on-chip antenna on silicon technology for subterahertz applications over wide-frequency range. High is achieved by exciting using an aperture fed mechanism to couple electromagnetics energy from metal slot line, which sandwiched between and polycarbonate substrates, 15-element array comprising circular rectangular radiation patches fabricated top surface layer. An open ended microstrip orthogonal slot-line, implemented...

A metamaterial photonic bandgap (MTM‐PBG) periodic structure is used as a decoupling frame to improve the isolation between transmit–receive (T/R) sections of densely packed array antenna in synthetic aperture radar (SAR) and multiple‐input–multiple‐output (MIMO) systems. With this technique MTM‐PBG shown effectively suppress surface wave propagations T/R antennas by an average 12 dB. layer comprises arrangement dielectric circles etched cross‐shaped microstrip that inserted radiating...

Abstract This paper presents the results of a study on developing an effective technique to increase performance characteristics antenna arrays for sub-THz integrated circuit applications. is essential compensate limited power available from sources. Although conventional array structures can provide solution enhance radiation-gain however in case small-sized radiation properties be adversely affected by mutual coupling that exists between radiating elements. It demonstrated here...

Abstract The paper presents a technique to enhance the isolation between adjacent radiating elements that is common in densely packed antenna arrays. Such antennas provide frequency beam‐scanning capability needed multiple‐input multiple‐output (MIMO) systems and synthetic aperture radars. method proposed here uses metamaterial decoupling slab (MTM‐DS), which located elements, suppress mutual coupling would otherwise degrade efficiency performance both transmit receive mode. MTM‐DS consists...

Abstract An effective method is presented for suppressing mutual coupling between adjacent radiating elements which based on metasurface isolation multiple‐input multiple‐output (MIMO) and synthetic aperture radar (SAR) systems. This achieved by choking surface current waves induced over the patch antenna inserting a cross‐shaped structure elements. Each arm of constituting etched with meander line slot. Effectiveness demonstrated 2 × array that operates six frequency subbands in X, Ku, K...

In this communication, a novel dual-polarized highly folded self-grounded Bowtie antenna that is excited through I-shaped slots proposed for applications in sub-6 GHz 5G multiple-input-multiple-output (MIMO) systems. The consists of two pairs radiation petals whose base embedded double layer FR-4 substrate with common ground-plane which sandwiched between the layers. defected located under elements. Each pair elements are microstrip line on top RF signal 180&#x00B0; out phase respect to each...

Circular polarized (CP) antennas are well suited for long-distance transmission attainment. In order to be adaptable beyond 5G communication, a detailed and systematic investigation of their important conventional features is required expected enhancements. The existing designs employing millimeter wave, microwave, ultra-wideband (UWB) frequencies form the elementary platform future studies. 3.4–3.8 GHz frequency band has been identified as worthy candidate communications because spectrum...