scispace - formally typeset
Search or ask a question
Proceedings ArticleDOI

Designing a miniaturised omega shape RIS loaded patch antenna for C-Band applications

01 Sep 2015-pp 1-4
TL;DR: Two metamaterial (MTM) microstrip patch antenna (MSPA) is presented in this paper and the unit cells are incorporated in the MSPA and observed the miniaturization.
Abstract: Two metamaterial (MTM) microstrip patch antenna (MSPA) is presented in this paper. Herein two Reactive impedance surface (RIS) unit cells are studied and designed. The RIS unit cells are loaded with omega (O-RIS) and complementary omega (CO-RIS) shapes. Subsequently the unit cells are incorporated in the MSPA and observed the miniaturization. The antenna is designed at C-Band. The O-RIS MSPA resonant at 5.4GHz with directive gain of 6.02dBi whereas the CO-RIS MSPA resonant at 4.5GHz with directive gain of 5.79dBi.
Citations
More filters
Proceedings ArticleDOI
19 Apr 2017
TL;DR: In this article, a novel design of metamaterial passive tag antenna for radio frequency identification operating in the UHF band is proposed, which included a meandering technique to match the antenna with the tag chip and a complementary split ring resonator to reduce the antenna size.
Abstract: In this paper, a novel design of metamaterial passive tag antenna for radio frequency identification operating in the UHF band is proposed The design of the proposed tag antenna included a meandering technique to match the antenna with the tag chip and a complementary split ring resonator to reduce the antenna size An advanced Photopaper substrate having a permittivity of 33, loss tangent of 004 and thickness of 025mm is used to design this tag antenna The dimensions of the proposed tag antenna are optimized by using ADS The total size of this circuit is 846 × 28mm2 The performance of the proposed tag antenna is evaluated and analyzed based on gain, return loss, matching input impedance and read range The simulated reflection coefficient is about −35dB at 915MHz, the impedance bandwidth is about 328MHz, gain is 18dB, and the read range is about 62 m

7 citations


Cites background from "Designing a miniaturised omega shap..."

  • ...After this interesting works, many structures that qualify as a metamaterial have been proposed such as the complementary split ring resonator (CSRR) [11], the U-shaped [12], the S shaped [13], the V shaped [14], the triangular shape [15], and omega shaped structure [16]....

    [...]

References
More filters
Journal ArticleDOI
TL;DR: In this paper, the fundamental electromagnetic properties of left-handed metamaterials and the physical realization of these materials are reviewed based on a general transmission line (TL) approach.
Abstract: Metamaterials are artificial structures that can be designed to exhibit specific electromagnetic properties not commonly found in nature. Recently, metamaterials with simultaneously negative permittivity (/spl epsiv/) and permeability (/spl mu/), more commonly referred to as left-handed (LH) materials, have received substantial attention in the scientific and engineering communities. The unique properties of LHMs have allowed novel applications, concepts, and devices to be developed. In this article, the fundamental electromagnetic properties of LHMs and the physical realization of these materials are reviewed based on a general transmission line (TL) approach. The general TL approach provides insight into the physical phenomena of LHMs and provides an efficient design tool for LH applications. LHMs are considered to be a more general model of composite right/left hand (CRLH) structures, which also include right-handed (RH) effects that occur naturally in practical LHMs. Characterization, design, and implementation of one-dimensional and two-dimensional CRLH TLs are examined. In addition, microwave devices based on CRLH TLs and their applications are presented.

1,285 citations

Journal ArticleDOI
TL;DR: In this article, the authors focus on the reflection phase feature of EBG surfaces, which can be used to identify the input-match frequency band inside of which a low profile wire antenna exhibits a good return loss.
Abstract: Mushroom-like electromagnetic band-gap (EBG) structures exhibit unique electromagnetic properties that have led to a wide range of electromagnetic device applications. This paper focuses on the reflection phase feature of EBG surfaces: when plane waves normally illuminate an EBG structure, the phase of the reflected field changes continuously from 180/spl deg/ to -180/spl deg/ versus frequency. One important application of this feature is that one can replace a conventional perfect electric conductor (PEC) ground plane with an EBG ground plane for a low profile wire antenna design. For this design, the operational frequency band of an EBG structure is defined as the frequency region within which a low profile wire antenna radiates efficiently, namely, having a good return loss and radiation patterns. The operational frequency band is the overlap of the input-match frequency band and the surface-wave frequency bandgap. It is revealed that the reflection phase curve can be used to identify the input-match frequency band inside of which a low profile wire antenna exhibits a good return loss. The surface-wave frequency bandgap of the EBG surface that helps improve radiation patterns is very close to its input-match frequency band, resulting in an effective operational frequency band. In contrast, a thin grounded slab cannot work efficiently as a ground plane for low profile wire antennas because its surface-wave frequency bandgap and input-match frequency band do not overlap. Parametric studies have been performed to obtain design guidelines for EBG ground planes. Two novel EBG ground planes with interesting electromagnetic features are also presented. The rectangular patch EBG ground plane has a polarization dependent reflection phase and the slotted patch EBG ground plane shows a compact size.

945 citations


"Designing a miniaturised omega shap..." refers background in this paper

  • ...The array of MTM unit cells forms metasurface/metasubstrate which behaves as Reactive impedance surface (RIS), this RIS layer enhances the EM waves in antenna by the equivalent inductance and capacitance [3-4]....

    [...]

Journal ArticleDOI
TL;DR: In this article, the authors proposed a reactive impedance surface (RIS) as a substrate for planar antennas that can miniaturize the size and significantly enhance both the bandwidth and the radiation characteristics of an antenna.
Abstract: The concept of a novel reactive impedance surface (RIS) as a substrate for planar antennas, that can miniaturize the size and significantly enhance both the bandwidth and the radiation characteristics of an antenna is introduced. Using the exact image formulation for the fields of elementary sources above impedance surfaces, it is shown that a purely reactive impedance plane with a specific surface reactance can minimize the interaction between the elementary source and its image in the RIS substrate. An RIS can be tuned anywhere between perfectly electric and magnetic conductor (PEC and PMC) surfaces offering a property to achieve the optimal bandwidth and miniaturization factor. It is demonstrated that RIS can provide performance superior to PMC when used as substrate for antennas. The RIS substrate is designed utilizing two-dimensional periodic printed metallic patches on a metal-backed high dielectric material. A simplified circuit model describing the physical phenomenon of the periodic surface is developed for simple analysis and design of the RIS substrate. Also a finite-difference time-domain (FDTD) full-wave analysis in conjunction with periodic boundary conditions and perfectly matched layer walls is applied to provide comprehensive study and analysis of complex antennas on such substrates. Examples of different planar antennas including dipole and patch antennas on RIS are considered, and their characteristics are compared with those obtained from the same antennas over PEC and PMC. The simulations compare very well with measured results obtained from a prototype /spl lambda//10 miniaturized patch antenna fabricated on an RIS substrate. This antenna shows measured relative bandwidth, gain, and radiation efficiency of BW=6.7, G=4.5 dBi, and e/sub r/=90, respectively, which constitutes the highest bandwidth, gain, and efficiency for such a small size thin planar antenna.

653 citations


"Designing a miniaturised omega shap..." refers background in this paper

  • ...The significance of MTM antenna is miniaturization of antenna size, improvement in directivity and bandwidth [1-2]....

    [...]

Proceedings ArticleDOI
22 Jun 2003
TL;DR: In this paper, the concept of a reactive impedance surface (RIS) with a specific surface reactance can minimize the interaction between the elementary source and its image (the RIS substrate).
Abstract: The concept of a novel substrate for planar antennas, that can miniaturize the size and significantly enhance both the bandwidth and the radiation characteristics of a printed antenna on such substrate, is introduced. Using the exact image formulation for the fields of elementary sources above impedance surfaces, it is shown that a purely reactive impedance surface (RIS) with a specific surface reactance can minimize the interaction between the elementary source and its image (the RIS substrate). A RIS can be tuned anywhere between perfectly electric and magnetic surfaces (PEC and PMC) offering the unique property to achieve the optimal bandwidth and miniaturization factor. This artificial surface is designed utilizing two-dimensional periodic square patches printed on a metal-backed dielectric substrate. A simplified circuit model describing the physical phenomenon of the periodic surface representing the RIS is developed for simple analysis and design of the proposed artificial surface. Also an FDTD full-wave analysis in conjunction with the periodic boundary conditions and perfectly matched layer walls is applied to provide a comprehensive study and analysis of complex antennas on such surfaces. An example including a dipole antenna over an RIS substrate is studied and its performance is compared with those of the same antenna over PEC and PMC surfaces.

30 citations


"Designing a miniaturised omega shap..." refers background in this paper

  • ...The array of MTM unit cells forms metasurface/metasubstrate which behaves as Reactive impedance surface (RIS), this RIS layer enhances the EM waves in antenna by the equivalent inductance and capacitance [3-4]....

    [...]

Proceedings ArticleDOI
07 Mar 2005
TL;DR: In this paper, the authors apply a transmission-line (TL) approach towards CRLH metamaterials to realize novel microwave devices including antennas with characteristics (functionality or performance) surpassing those of conventional (i.e., RH) materials.
Abstract: Recent research on metamaterials with simultaneously negative permittivity (/spl epsiv/) and permeability (/spl mu/), more commonly referred to as left-handed (LH) materials, has stimulated the development of novel concepts and applications. Since right-handed (RH) effects are unavoidable, practical LH materials (LHM) are in reality composite right/left-handed (CRLH) materials. Interestingly, the co-existence of LH and RH contributions in CRLH materials, far from being detrimental, leads to useful phenomena. By applying a transmission-line (TL) approach towards CRLH metamaterials, the unique properties of these metamaterials have been used to realize novel microwave devices including antennas with characteristics (functionalities or performance) surpassing those of conventional (i.e., RH) materials.

11 citations


"Designing a miniaturised omega shap..." refers background in this paper

  • ...Array of square patches RIS layer is reported [5-7]....

    [...]