A novel metamaterialinspired patch antenna is proposed, wherein a 2segment srr labyrinth metamaterial is embedded inside the antenna substrate. The metamaterial unit cell consists of two dielectric sheets intersecting at 90 degrees. Design and modeling of a novel double negative metamaterial. I want to simulate a metamaterial unitcell in hfss, but i dont know. Metamaterial, split ring resonators srr, equivalent circuit model, high frequency structure simulator hfss. To enable the thermal and stress analysis it is only necessary to simulate a single unit cell of the metamaterial which in our case is. This unit cell is composed of half wavelength transmission line method.
Antenna array composed of unit cell resonators springerlink. Structural investigation of metamaterial unitcells. Two clss have been added to the upper and lower sections of the complementary srr metamaterial unit cell, so that the characteristic resonance is obtained in the frequency range 3. Design and simulation of double s shaped metamaterial.
Metamaterial unit cell square srr design using cst and hfss part 1 duration. Metamaterial based circularly polarized fourport mimo. Remcoms xfdtd software performs em simulations of devices containing metamaterials with unusual or frequency dependent properties. A novel infinity shaped split ring resonator to form a new. The proposed filter is designed for military band applications 48 ghz by using low cost substrate material fr4. Freespace measurements of dielectrics and threedimensional.
This paper proposes a gainenhanced metamaterial mm absorberloaded monopole antenna that reduces both radar crosssection and back radiation. The metamaterial unit cell is designed, optimized and simulated using the commercial software package high frequency structure simulator hfss. Metamaterial unit cells are loaded on ground to improve the antenna parameters. The structures of unit cells were simulated using high frequency structure simulator hfss software. The metamaterial unit cell is composed of an interdigital capacitor and a complementary splitring resonator csrr slot. Ansoft hfss has been used to simulate the unit cell designed in figure 6a. The mng design with improved bandwidth is done in two stages. Design and analysis of microstrip band stop filter using. Design of a single negative metamaterial based microstrip. The development of hfss simulation models for metamaterials has been established for split ring resonators srr and capacitively loaded strips cls as detailed in. Simulation of simultaneously negative medium metamaterials. This video coantains design procedures of a square shaped metamaterial unit cell using cst and hfss.
There are wellknown methods of metamaterial design to provide simultaneous negative permittivity and permeability using srrs 5,6. Lefthanded metamaterialinspired unit cell for sband. Hfss and cadfeko software has been utilized to optimize the structure in the band of interest. Figure 7 from hybrid mode wideband patch antenna loaded.
What should be the dimensions of a metamaterial unit cell. Jul 08, 2011 antenna characteristics such as, scattering parameters farfield radiation patterns with and without the presence of mng are provided. Research article uwb metamaterialloaded antenna for c. Design of magnetic metamaterial with cells of duallayer. A tunable transmission line based on an siw loaded by a new. Freespace measurements of dielectrics and threedimensional periodic metamaterials a thesis submitted in partial fulfillment of the requirements for the degree of master of science in electrical engineering by clifford e. The solid circle based unit cell is analyzed to find its absorptivity nature. The proposed filter is designed and simulated through the hfss software.
The unit cell structures of ttsr and nbsr are shown in fig. To realize a periodic array for a metamaterial absorber, the footprint size and thickness of a unit cell must be miniaturized to a subwavelength. The top view of the 2segment srr metamaterial rmpa is shown in figure 9. Many such arraystructures of single unit cells are combined and embedded into the. The proposed reduced fractal metamaterial unit cell, where l. It is observed that upon incorporation, the bandwidth widens to around 600% and vswr improves by approx. This paper presents the design and analysis of a novel single negative metamaterial mtm based on concentric rings with crossed lines crcl to be miniaturized to. To demonstrate the proposed idea, we designed a wire monopole antenna and an mm absorber. Design and modeling of a novel double negative metamaterial for.
On the performance of the 2d planar metamaterial structure. The design tool is the hfss software which uses the finite element method. A novel metamaterial inspired patch antenna is proposed, wherein a 2segment srr labyrinth metamaterial is embedded inside the antenna substrate. Numerical simulation displays that the resonant frequency of the metamaterial unit cell with the new structure is at 24. A tunable transmission line based on an siw loaded by a. After designing the unit cell we have to assign boundaries and excitations to the cell and then is simulated using cst studio software which results in different properties. The unit cell is structured to behave as a single negative mtm. Simulation of simultaneously negative medium metamaterials xiao wang abstract metamaterials are artificial materials and named by those who work in the microwave material area.
Mar 21, 2017 the metamaterial is analyzed in finite element method software, ansys hfss. The unit cell of the metamaterial consists of three concentric copper rings at di. An engineered metamaterial is proposed for achieving the circular polarization and suppression of mutual coupling in closely placed fourport mimo mu. First we have to select the substrate material, different substrates shows different properties so depend on the application we have to select the substrate. The proposed design of an antenna is a novel microstrip antenna array composed of metamaterial structures, in the form of closed ring, and unit cell resonators developed on fr4 epoxy dielectric constant 4. The unit cell is cubic, with a cell dimension of d2. This metamaterial is embedded in the middle of the antennas substrate such that the center of patch coincides with the center of the metamaterial. Uwb, miniaturized and directive metamaterial loaded antenna.
The unit cell is simulated by hfss by using pec and pmc boundary condition. The proposed metamaterial structure operates in the optical frequency range and can be used as a digital processing filter. According to existing documentation, the metamaterials have relative permittivity andor relative permeability of values less than 1, including negative values. This is a simple and compact design and has multiband features suitable for wimax, wlan, cband and xband applications.
Proper description of assigning the boundaries and feeding mechanism was also mentioned. The unit cell is designed with its resonance within the uwb range of 3. Hfss is a 3d fullwave electromagnetic field solver, utilizing the fem, with adaptive meshing, approach to solve the em wavestructure interaction. Hfss simulated electric field distributions of the proposed antenna a at 3. A proposed design of unit cell of metamaterial for 5g mobile. A copper srr and wire are positioned on opposite sides of the substrate,modeling the structures typically produced by lithographic circuit board techniques. For each unit cell type, the dimensions of unit cell can be adjusted to satisfy condition at resonant frequency fr. Microstrip antenna, metamaterial, multiband,sierpenski,complementarysplit ring resonator 1.
In this paper, we introduce a new compact lefthanded tunable metamaterial structure, inspired by a joint td shape geometry on a flexible nial2o4 substrate. Freespace measurements of dielectrics and threedimensional periodic metamaterials clifford e. Metamaterial fss unit cell design using hfss part 1 youtube. The theoretical analysis is founded on the famous transmissionline theory for the metamaterial concept. Ive already investigated the farfield behavior by simulating a unit cell, utilizing masterslave boundaries to force the unit cell behavior to be replicated and forcing a plane wave to impinge upon the infinite sheet of metamaterial by utilizing perfect e and perfect h boundaries on my ports. Finally the unit cells are combined to form linear 2d array topology. The 3 x 8 ishaped unit cell which is printed on the single layer of the metamaterial with same and different sized unit cell for both uniform and nonuniform structure and its antenna parameters are calculated. The extraction of effective parameters by the method of reflection transmission coefficients demonstrates the metamaterial behavior of the said structure. Investigation on frequency analysis of metamaterial structure. For the simulation, the unit cell is placed inside an air box with dimensions of 6 mm. These metamaterial antennas will be very suitable to use in wlan both 2. To study the wave propagation properties of the proposed unit cell, a full wave simulation based on fem is carried out to this unit cell using ansysansofts hfss formulations as follows.
I am totally newcomer with hfss and what i want to do is to simulate a simple metamaterial unit cell structure in hfss. Since the circle based unit cell is well known and commonly used, it is taken as a reference unit cell. Hybrid mode wideband patch antenna loaded with a planar metamaterial unit cell. Introduction metamaterials with unconventional electromagnetic. Metamaterial superstrate antenna design with gain enhancement. Again as the structural average cell size of metamaterial is less than onefourth of the guided wavelength so it supports high degree of miniaturization. The design of the mng unit cell and its effective constitutive parameters are also provided. The cell is composed of two identical infinityshaped copper patterns etched parallel on both sides of dielectric laminate. The dimension of the unit cell is the same as the ris structure employed in the antenna of fig. Subwavelength metamaterial unit cell for lowfrequency. Lefthanded metamaterial inspired by joint td geometry on. Metamaterial antennas are a class of antennas which use metamaterials to increase performance of miniaturized electrically small antenna systems.
A unit cell is usually smaller than 110 of the operating wavelength see figure 7, depending on the shape of the metamaterial, but the unit cell size is different 19, 20, 26. We demonstrate the effects of substrate material thickness on the effective. However, this class of antenna incorporates metamaterials, which are materials engineered with novel, often microscopic. Then, the proposed mng unit cell with a combination of three di. A negative index metamaterialinspired uwb antenna with an. How can i simulate metamaterials based antenna in hfss. The mm absorber comprised lumped elements of subwavelength unit cells and achieved 90% absorbance bandwidth from. Figure 8 from hybrid mode wideband patch antenna loaded. Their purpose, as with any electromagnetic antenna, is to launch energy into free space. Hey everybody, im simulating a dng metamaterial in hfss 12. Application of metamaterial structures in the design, analysis and. The designed metamaterial exhibits an extralarge negative refractive index bandwidth of 6.
Journal of engineering a crescent shaped split ring resonator. The proposed metamaterial antenna design starts with a metamaterial unit cell for uwb microwave imaging application. The dimensions of the metamaterial unit cell or lens are shown here. Metamaterial enhances microstrip antenna gain microwaves. Almutairi 2, and nowshad amin 3 1 centre of advanced electronic and communication engineering, faculty of engineering and built environment, universiti kebangsaan malaysia, 43600 bangi, selangor, malaysia. Research article uwb metamaterialloaded antenna for cband. Here metamaterial antenna using unit cell is proposed, designed and simulated using cst microwave studio software. Antenna characteristics such as, scattering parameters farfield radiation patterns with and without the presence of mng are provided. Includes frequency selective surfaces, ferrite materials and more.
As plotted in figure 6, the real part of permeability extracted from simulated sparameters has both. The design of metamaterial unit cell structure can be simulated by high frequency structure simulator hfss or cst microwave studio. While testing the metamaterial unit cell, it is advisable to use pec negative and. Measurement, simulation, and theory of a nonfoster unit. The optimization of the antenna is carried out using cst microwave studio commercial software. Metamaterials in application to improve antenna parameters. A dispersion analysis of the metamaterial unit cell reveals that an increase in series capacitance can decrease the halfwavelength resonance frequency, thus reducing the electrical size of the proposed antenna. In this paper, we propose a subwavelength metamaterial unit cell for lowfrequency electromagnetic absorber applications. Design and analysis of a novel concentric rings based. Upon simulation it was found that at center frequency 36thz s 11 reflection coefficient is. Rfantenna projects electrical engineering cal poly. Parameter extraction for negative index metamaterials. The high frequency structure simulator hfss software was used to design, optimize and simulate the metamaterial unit cell. The dimensions of the designed metamaterial mms unit cell is, outer resonator length l out 8.
Many such arraystructures of single unit cells are combined and embedded into the double positive normal dielectric materials dps. The unit cell is formed from a four splitring resonator srr that has got hexagonal strips 6. The design starts with the metamaterial structure which is. The idea of multiresonator structures is to use several di. Dual notch uwb fork monopole antenna with crlh metamaterial load. Metamaterial unit cell square srr design using cst and hfss. Then, the tunable dualband twosided plpm tsplpm unit cell is designed by printing a similar plpm.
Uwb metamaterialloaded antenna for cband applications. Unit cell, planar metamaterial hfss model and triplanar models fig. The periodicity of the ris structure is much smaller than the effective wavelength of the substrate. The ansoft hfss software is used to analyse various parameters of srr. Dec 02, 2018 metamaterial fss unit cell design using hfss. Flexible frequency selective metamaterials for microwave.
Triple band circular ringshaped metamaterial absorber for. Applying the retrieval method proposed in, we can calculate the effective permeability of the metamaterial unit cell. How to set boundary condition for metamaterial unit cell in hfss. Mutual coupling reduction of dualband printed monopoles. The structure dimensions, boundary conditions and the structure itself are from kevin buell, hossein mosallaei and kamal sarabandi a substrate for small patch antennas providing tunable miniaturization factors ieee article. Effect of thermal and mechanical deformation of metamaterial. Investigation of resonance characteristics and effective.
Dual band metamaterial antenna for ltebluetoothwimax. Kintner university of arkansas bachelor of science in electrical engineering, 2015 december 2017 university of arkansas. Dec 03, 2014 this video coantains design procedures of a square shaped metamaterial unit cell using cst and hfss. I want to simulate a metamaterial unitcell in hfss, but i dont know how must the. I would like to simulate metamaterial unit cell, i have problem about floquet port and masterslave boundary assignment in hfss. A miniaturized antenna with negative index metamaterial based. Bandwidth enhancement of rmpa using 2 segment labyrinth.
Design and simulations are conducted using ansofts hfss software which is based on the finite element method fem. Hfss metamaterial nearfield simulation hello, try to use he field symmetry in your structure to reduce the structure size in hfss and in this way you will simulate half of your actual structure and ll get results of the whole structure. Digital metamaterial filter for encoding information. In this paper, we report computer software hfss and cadfekosilver. In addition, the analytical dispersion equation of the simplified crlh equivalent circuit, fig. Metamaterial fss unit cell design using hfss part 1. The structure is then simulated using hfss software. The boundaries and lumped ports 1 and 2 have been assigned as per figures 5bd. Design and experimental characterization of spiral. All the simulations presented in this paper are done in hfss software. Investigation on frequency analysis of metamaterial structure rajni. Microwave electronics lab analysis and design of lefthanded metamaterial lenses using ansoft hfss anthony lai1, kevin m. The metamaterial is very thin and easy to fabricate. The cavities between the neighbouring patches on the unit cell forms capacitance, c and the hexagonal strips bring an inductance, l that permits for regulating the resonant characteristic of the.