A novel metamaterialinspired patch antenna is proposed, wherein a 2segment srr. The electrically small antenna is in free space and may be enclosed in a sphere of radius a. The array is situated between human model and the antenna and can be depicted that the sar reduces by 1. The performance in terms of bandwidth, gain and so on for these antennas is extremely critical and is governed by fundamental limitations in size, i.
Metamaterial is used to load the microstrip patch antennas either by partially. Uwb metamaterialloaded antenna for cband applications. In this the length of srr is optimized so that the loaded antenna resonant at a frequency that lies in frequency regime in which the isolated srr shows the metamaterial properties. Request pdf electrically small patch antenna loaded with metamaterial in. In 2005 a patch antenna with a metamaterial cover was proposed that enhanced directivity. A novel metamaterial structure has been proposed for its operation at 2. Request pdf metamaterial loaded frequency tunable electrically small planar patch antenna in this paper, we present a metamaterial loaded frequency tunable electrically small planar patch antenna. The first issue is related to the anisotropy of the. Meta material is loaded on fr4 substrate at height of 3. Novel electromagnetic metamaterials negative index metamaterials references 1 theoretical formulation for an electrically small microstrip patch antenna loaded with negative index materials by j. Electrically small rectangular patch antenna with slot for.
The antenna structure operates at three operating frequencies at 3. The geometry of the proposed electrically small monopole antenna, which consists of a tshaped patch and a set of rectangular srr rings, is depicted in fig. All simulations are carried by cst mw studio software. In this paper, a miniaturized elc electricinductivecapacitive based dualband antenna is proposed for wimax and wlan applications. This leads to the fundamental question if this kind of antenna can be referred to as a metamaterial antenna anymore. Electrically compact srrloaded metamaterial inspired quad. The proposed antenna exhibits frequency reconfigurability of 1. Their purpose, as with any electromagnetic antenna, is to launch energy into free space. Pdf design of multiband microstrip antenna using stepped. Bandwidth enhancement and size reduction of microstrip. The loading of metamaterial shows a radial size reduction of 56.
This concept is used by the authors to design and fabricate the polypropylene based metamaterial loaded microstrip patch antenna for public safety band. A dual layer periodically patterned metamaterial inspired antenna on a low cost fr4 substrate is designed, simulated, fabricated, and tested. This study initially presents an analysis of these limits and corresponding performance parameters. Performance enhancement of microstrip patch antenna using. Here h shaped inter connected split ring meta material structures is used to reduce the size of the microstrip patch antenna. Metamaterials in application to improve antenna parameters. Miniaturized microstrip patch antennas loaded with metamaterial are presented in 45. At different bands on a single device, multiband microstrip patch antenna is. Efficient design of electrically small antenna using. Using chu limit, size of the antenna, that is ka, reaches 0. The antenna consists of a quasimodified rectangular radiating patch with a partial ground plane and two parasitic elements openloopring resonators to serve as coupling. Each of these has many variations to fit the mechanical constraints of specific applica. Metamaterial embedded wearable rectangular microstrip patch. The effect of mutual inductance on the resonant frequency, bandwidth, gain, and size of metamaterial loaded electrically small microstrip patch antenna is reported in.
Geotextile based metamaterial loaded wearable microstrip. Electrically small uslot loaded circular microstrip patch. When combining a righthanded material rhm with a veselagolefthanded. Metamaterial inspired electrically small patch antenna. Optimized reconfigurable electrically small planar.
The resonant frequency of rectangular microstrip patch antenna decreases with respect to. We present two kinds of metamaterial lens antennas. A metamaterial paradigm for achieving an efficient, electrically small antenna is. The proposed miniaturization technique is potentially promising for antenna applications and the results presented in the paper constitute a relevant proof for the usefulness. Producing equivalent fields in a conductor requires significant power. Gain enhancement of microstrip patch antenna using dielectric dng superstrate by abdulbaset m. Miniaturization of microstrip patch antenna using metamaterial. Srrloaded metamaterialinspired electricallysmall monopole. Elc metamaterial modifies the current direction and yields dualband characteristics.
Accordingly it is used to achieve significant bandwidth enhancement and analyze the matching and radiation properties of sub wavelength resonant patch antenna filled with doublenegative, double positive and single negative meta material block,quasi static equivalent circuit model for analysis and design of different types of artificial. First, we demonstrate a series of 3d broadband, low loss, dual polarization, and highdirectivity planar lens. Electrically small rectangular microstrip patch antenna. For a conventional microstrip antenna, patch size is about 0. In the recent decade, the application of metamaterials in antennas has invoked increasing interest. The most common definition is that the largest dimension of the antenna is no more than onetenth of a wavelength. The designed antenna consists of a ring monopole antenna coupled with elc resonator and partial rectangular ground plane, which is fed by 50. Spherical shells of homogenous, isotropic negative permittivity eng material are designed to create electrically small resonant systems for several antennas.
Electrically small antennas, high directivity and tunable operational frequency are produced with negative magnetic permeability. The same metamaterial unit cell structure is utilized to fabricate a metascreen. The operation of such a radiative component has been predicted in alu et al. Werner 2005 ieee antenna and propagation society international symposium, vol. An electrica lly small antenna is designed b y loading the patch with split ring resonators, but. This antenna has better vswr, gain and radiation efficiency compared to an ordinary patch antenna. Rothwell department of electrical and computer engineering. A miniaturized cpwfed spiral ring resonator loaded slot.
Further, the concept of intended phase shift between interfering waves is used to. Miniaturization of rectangular patch antennas partially. Also, the radiation resistance of the small antenna is very small so it must carry a large current to radiate any signi cant power. The unloaded rectangular microstrip patch antenna resonates at 14. The specific absorption rate sar can be reduced by placing metamaterial srrs between the antenna and human muscles. Metamaterial antennas are a class of antennas which use metamaterials to enhance or increase performance of the antenna system. Since antenna integration and miniaturization are two major challenges in mimo systems, we propose a slot loaded electrically small rectangular patch antenna that operates in the 0. Introduction microstrip patch antenna has been very popular due to their small size, light weight, low profile, less cost. Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized electrically small. Recently, the authors have reported the planar electrically small microstrip patch antenna loaded with metamaterial square srr and msrr. Novel dual band microstrip circular patch antennas loaded. Electrically small sensors electrically small impedance transformers electrically small antennas lower frequencies metamaterial inspired constructs.
Design and simulation of rectangular microstrip patch antenna loaded with metamaterial structure. Frequency switching of electrically small patch antenna using. Experimental verification of metamaterial loaded small patch. An example is a patch antenna where the patch radiator is decreased in area. Design and fabrication of a miniaturized microstrip. The meaning of the term wireless communication is the transfer of any. Recently, the authors have reported the planar electrically small microstrip patch antenna loaded with. A circular disc patch antenna resonating at dual band frequency with 2. Miniaturization, metamaterial, microstrip patch antenna, double negative property. Subwavelength, compact, resonant patch antennas loaded with metamaterials abstract we analyze the matching and radiation properties of subwavelength resonant patch antennas filled with doublenegative, doublepositive, andor singlenegative metamaterial blocks. Metamaterialinspired engineering of electrically small. In this sort of metamaterial loaded patch antennas, the resonant frequency can be tuned according to designers will. By placing these metamaterial structures under the patch, a subwavelength resonance occurs which leads to a smaller size patch antenna compared to the conventional antenna at that frequency.
Home archives volume 58 number 21 electrically small uslot loaded circular microstrip patch antenna with csrr call for paper june 2020 edition ijca solicits original research papers for the. This paper focuses on a new dual turn spiral resonator dtsr loaded electrically small microstrip patch antenna. From the above defined equations, equivalent inductance and capacitance are. Metamaterial antenna the demerits of ordinary patch antenna like low gain and efficiency can be overcome and is useful in the field of wireless communication. Apart from these advantages they also have various disadvantages like narrow band w idth, less gain etc. In this proposed antenna a high radiation efficiency of about 84. The rectangular microstrip patch antenna is loaded by metamaterial using planar square spilt ring resonators srrs. First, we formulate a general theory for inhomogeneously loaded subwavelength elliptical patch. Performance improvement of micro strip patch antenna.
In this paper, we present a single layer metamaterial inspired antenna, where the squarecircular srr metamaterial was incorporated with the patch of the antenna. The eigenmode dispersion simulations are performed indicating the left handed metamaterial characteristics and are tunable with substrate permittivity. The proposed dtsr loaded antenna is mount the resonant frequency of the antenna gets lowered with improved magnetic permeability of dielectric materials through metamaterial loading. Electrically small rectangular microstrip patch antenna loaded with metamaterial, in proc. Experimental verification of metamaterial loaded small. The modification of tm020 mode is reported by partially metamaterial loaded rectangular patch antenna 16. Infinite wavelength devices electrically small antennas high directivity antennas compact multifrequency antennas compact multifunctional antennas dispersion engineering. Asymmetric cpwfed electrically small metamaterial inspired wideband antenna for 3. The output parameters of patch antenna without and with the metamaterial superstrate. Ali a thesis submitted in partial fulfillment of the requirements for the degree of master of science in electrical engineering approved by.
Metamaterial inspired microstrip antenna investigations using. It means more inductance, hence the lower resonant frequency. In fact, the gain performances of such electrically small. The addition of an srrdng metamaterial increased the radiated power by more than an order of magnitude over a comparable free space antenna. The proposed antenna structure reduces the resonant frequency with respect to the reference antenna slot antenna without srr by 45. A twostep evolution leads to a compact size antenna. Ziolkowski, electrically small dualband and circularly polarized magneticallycoupled nearfield resonant parasitic wire antennas. An electrically small antenna has a very reactive input impedance with an associated very narrow bandwidth 2. Following our recent findings on the possibility of squeezing the resonant dimensions of circular patch antennas by using negativepermeability loadings, here we theoretically and numerically analyze subwavelength elliptical patch antennas partially loaded with magnetic metamaterials.
Owing to the high efficiency and compact size, the proposed antenna will find broad applications in the field of wireless communication. Aug 20, 20 parameters microstrip patch antenna metamaterial patch antenna resonant frequency ghz 1. Electrically small patch antenna loaded with metamaterial. Electrically small metamaterial antenna of zeroth order resonance incorporating a spiral resonator embedded into an asymmetric coplanar stripline is reported. The strategy is to design a length of metamaterialloaded transmission line that can be. Miniaturisation of an electrically small metamaterial. That formulation has allowed us deriving the necessary conditions in. The meta material spherical shell can be designed to create a matched resonant antenna system, i. The antenna was excited with a microstrip zigzag shaped feed line printed on the fr4 dielectric material. In the present work, a metamaterialinspired antenna is. An electrically small antenna is designed by loading the patch with split ring resonators, but the thickness of the substrate is large, which makes it incompatible in integration with other devices. Design and simulation of rectangular microstrip patch.
Subwavelength elliptical patch antenna loaded with. Metamaterial embedded wearable rectangular microstrip. Therefore, the monopolesrr antenna becomes an acceptable electrically small antenna, at the resonance frequency of the srr. Thus, it is observed that the slotting means metal removing technique. When designing a passive rfid tag, it is clear that the antenna is a major component of the overall size 6. Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized electrically small antenna systems.
This paper presents a new electrically small rectangular microstrip patch antenna loaded with metamaterial multiple split ring resonator msrr. Spiral embedded electrically small reconfigurable antenna. A printed compact monopole antenna based on a single negative sng metamaterial is proposed for ultrawideband uwb applications. Some application examples for this purpose are metamaterial based efficient esas, 10 electrically small splitring resonator antennas, 11 and electrically small patch antenna loaded with. Abstract in this paper, authors present an optimized reconfigurable electrically small planar microstrip patch antenna loaded with square shaped split ring resonator metamaterial with microsplits. The performance of the proposed antenna is compared with reported metamaterial antenna of comparable. Recently, a distinction between metamaterialbased and metamaterialinspired antennas has been proposed to. A lowprofile, keyshaped structure forms the radiating monopole and is loaded with metamaterial unit cells with negative permittivity and more than 1. Frequency switching of electrically small patch antenna using metamaterial loading. Electrically small planar antennas based on metamaterial.
A patch antenna is a lowprofile directional radio antenna that is used for indoor locations covering singlefloor offices, stores and small studios. Many research works have proved that a zortl can be used to provide an electrically small antenna, which looks like using electrically large antennas. In this the length of srr is optimized so that the loaded antenna resonant at a frequency that lies in frequency regime in which the isolated srr. In this paper, a planar monopole antenna for multi band applications is proposed. The rectangular microstrip patch antenna is loaded with planar metamaterial square spilt ring resonators srrs in three different configurations at a distance of 0. Definition of electrically small there are various rules of thumb for considering an antenna to be electrically small. Compact ultrawideband monopole antenna loaded with. But it has been shown that electrically small size patch antenna having metamaterial loading is not practicable without degradation of radiation performance 7, 8. Findings electrically small circular patch antennas loaded with single layer metamaterials experimentally demonstrated to acceptable figures of merit for applications. This is because it is difficult to attain an inductive input reactance and a suitable gain of an electrically small antenna. There are microstrip antenna technology miniaturized by means of. Metamaterials by using a single unit cell the antenna gives of 3.
Raghavan, srrloaded metamaterialinspired electricallysmall. Dualband monopole antenna loaded with elc metamaterial. One plate is larger than the other, which is called ground plane and. Metamaterials and their applications on antenna gain enhancement. In table i, the performance of the patch antenna proposed in this paper is compared to that miniaturized patch antenna whose substrate is loaded by mng metamaterial 10. Subwavelength, compact, resonant patch antennas loaded with. The unloaded rectangular microstrip patch antenna resonates at 23 ghz, whereas. Metamaterialbased efficient electrically small antennas request. Undoubtedly, metamaterialinspired theoretical ideas can offer new points of view in the traditional smallantenna design. For example, resonant conditions for strongly subwavelength patch antennas, or possibilities to overcome the smallantenna q. An electrically small antenna in free space is defined by the constraint that 0.
Design of electrically small metamaterial antenna ijert. Itohcompact circularlypolarized patch antenna loaded with metamaterial structures. When the srr is made part of this configuration the characteristics, such as radiation pattern of the antenna are entirely changed. Enhancement of electrically small antennas prop erties with. It is observed that upon incorporation, the bandwidth widens to around 600% and vswr improves by approx. In this paper, a simple and efficient approach is presented for the design of a compact cpw fed slot antenna loaded with complementary split ring resonators csrrs and metamaterial mtm slab. Electrically small microstrip patch antenna loaded with. Comparison of the size of microstrip patch antenna mpa without loaded. Abstract this paper presents a new electrically small rectangular microstrip patch antenna loaded with metamaterial multiple split ring resonator msrr. In the case of the plane wave propagation, the electric and magnetic fields are represented as. Frequency switching of electrically small patch antenna.
Metamaterial loaded frequency tunable electrically small. The total size of the proposed antenna is reduced 54. Finally, asymmetrical slot has been used and a wide band antenna of band width 900 mhz has been achieved. Further meta material is loaded on a ground plane of rectangular. Citeseerx document details isaac councill, lee giles, pradeep teregowda. An electrically small antenna ensures easy integration with devices without compromising the form factor. Miniaturized circular microstrip patch antenna partially loaded with. The unloaded rectangular microstrip patch antenna resonates at 23 ghz, whereas after loading it by metamaterial, the same antenna resonates at 9. Microwave metamaterial antennas and other applications. It has always been desired to reduce the size of the antenna while keeping the remaining parameters same, this helps us using the small antenna at lower frequencies.
In this the length of srr is optimized so that the loaded antenna resonant at a frequency that lies in frequency regime. Figure 5 gain for the simple rectangular patch antenna using hfss. It is mounted on a small, rectangular, flat surface and consists of two metallic plates placed upon each other. It has been shown that the fundamental resonant frequency of the conventional slot antenna can be lowered considerably by loading csrrs and an mtm slab. Design and simulation of rectangular microstrip patch antenna. Lhms left hand metamaterials developed from tl theory in general offer a very wide band and very low losses. Electrically small antennas loaded with metamaterials for. Small antenna types the most common structures used in electrically small antennas are the short dipole or equivalent monopole and ground place, the small loop, and the dielectricallyloaded patch. Werner, title theoretical formulation for an electrically small microstrip patch antenna loaded with negative index materials, booktitle in ieee antennas and propagation society international symposium,38.
The antenna finds its applications in xband and kubnad. Gain enhancement of microstrip patch antenna using dielectric. A novel metamaterialinspired patch antenna is proposed, wherein a 2segment srr labyrinth metamaterial is embedded inside the antenna substrate. Electrically small metamaterialbased antennas have we seen.