Design of Compact and High Directive Slot Antennas Using Grounded Metamaterial Slab

Abstract

In this letter, a simple and compact directivity enhancement of slot antenna using a grounded metamaterial slab is proposed. This approach two different configurations. In the first configuration dielectric layers are used for designing antenna and metamaterial slab. Despite the directivity enhancement bandwidth of about 10.74% is obtained for It is also shown that, over the whole working band broadside directivity improvement is maintained the unloaded slot. In the second configuration of dielectric is used for designing both antenna and metamaterial slab. Thus, in this case, the total thickness of the loaded is noticeably reduced to 0.5 mm, or 0 0.014 λ a simple and compact approach for directivity enhancement of slot antenna using a grounded This approach has been applied in In the first configuration, two for designing antenna and metamaterial directivity enhancement, an improved for this configuration. , over the whole working band, a significant maintained compared to configuration, only a single layer of dielectric is used for designing both antenna and metamaterial of the loaded antenna 0 λ at resonance.Waveguide (CPW), Slot, MNZ and EVL Metamaterial, Leaky wave, Directivity enhancement.

A Miniaturization of Microstrip Antenna Using Negative Permitivity Metamaterial Based on CSRR-Loaded Groundfor Wlan Applications

“…It indicates that the CSRR unit cell presents the negative permittivity metamaterial at desired resonance frequency band. The similar results were also observed by other groups [17,18]. To evaluate the effect of using CSRR MTM structure on microstrip antenna design, the technical parameters of both normal and MTM antennas were carried out.…”

Directivity enhancement of wire monopole antenna using magnetic metamaterials

“…For enhancing the gain/directivity, Lovat et al proposed a novel idea using epsilon‐near‐zero (ENZ) and/or a mu‐very‐large (MVL) material excited by an electric dipole source as described in References , whereas, a mu‐near‐zero (MNZ) material and/or an epsilon‐very‐large (EVL) material is excited by a magnetic dipole. The EVL based metamaterial recently has been successfully applied for increasing directivity of a magnetic dipole, that is, slot antenna with compact configuration …”

“…The EVL based metamaterial recently has been successfully applied for increasing directivity of a magnetic dipole, that is, slot antenna with compact configuration. [10][11][12] In this article, an MVL based metamaterial slab has been applied for directivity enhancement of a wire monopole antenna owing to its electric dipole nature. In this regard, a magnetic metamaterial, operating under normal incidence, is used as unit cell of the metamaterial slab.…”

Gain Enhancement of Planar Dipole Antenna Using Grounded Metamaterial

“…This concept was first theoretically developed by Lovat et al for electric as well as magnetic dipole source in [15,16] where the gain/directivity enhancement was achieved through mu-near-zero (MNZ) material and/or an epsilonvery-large (EVL) material for a magnetic dipole source and epsilon-near-zero (ENZ) and/or a mu-verylarge (MVL) material for an electric dipole source, respectively. Recently, according to the concept, the directivity of a magnetic dipole, i.e., slot antenna has been successfully enhanced using an EVL based metamaterial structure in [17,18]. It is known that EVL characteristic could be achieved from the electric resonance of an electric inductive capacitive (ELC) resonator type metamaterial structure [19].…”