However, microstrip patch antennas have some shortcomings compared to non planar antennas, such as their narrow bandwidth, low gain and. The effects of a protecting dielectric superstrate on the radiation pattern of an xband rectangular microstrip patch antenna have been studied experimenta. Enhanced patch antenna performance using two layers. A dielectric superstrate layer above a microstrip patch antenna has remarkable effects on its gain and resonant characteristics. Here two different types of antenna have been made, one. This paper experimentally investigates the effect of a superstrate layer for high gain on microstrip patch antennas. May 24, 2018 the designed microstrip patch antenna has a planner structure and operates in industrial, scientific and medical ism band. Crosstype fractal with a superstrate layer is introduced here.
Us20100277374a1 antenna having metamaterial superstrate. Isolation and gain enhancement of patch antennas using emnz. It is conducted by optimising the dielectric superstrate parameters, i. A superstrate patch antenna for 60ghz applications ieee. The designed microstrip patch antenna has a planner structure and operates in industrial, scientific and medical ism band. Introduction a microstrip antenna consists of a radiating patch on one side of a dielectric substrate, which has a ground plane on the other side. In this video, i have explained microstrip antenna or patch antenna by following outlines.
Antipodal radiation pattern of a patch antenna combined. Specifically, the proposed antenna could achieve the measured antenna gain of. The antenna is impedancematched by means of a quarterwavelength. Jun 03, 2015 in order to design a microstrip patch antenna at first the designer is to select the substrate material and its thickness. Influence of ebg structures on the farfield pattern of. Gain pattern for a microstrip fed parasi tic patch superstrate with a superstrate size 2 i0, for different frequencies in the band. The geometrical structure under consideration of circular patch antenna prototype and superstrate material is shown in figure 6, figure 7, figure 8, figure 9. As a reference model, a conventional rectangular patch antenna on a highpermittivity substrate is used. The effect of changing substrate material and thickness on. A superstrate patch antenna for 60ghz applications ieee xplore. Design high directive rectangular microstrip patch antenna with. The proposed antenna with a metasurface superstrate structure loading was designed and analyzed using the commercially available finite element methodbased high frequency full wave electromagnetic simulator hfss v.
Understanding the behaviour of the microstrip patch antenna and design of it for different metamaterial. In the antenna development, the his elemental structure was mounted onto the antenna substrate around the radiation patch to suppress the surface wave, and the modified fss superstrate was suspended 20 mm above the radiating patch to improve the directivity. The antenna includes a resonator and a superstrate. Antenna 1 indicates the slot antenna where the superstrate and parasitic patches are both eliminated from the proposed design. We measured the gain of antennas with and without a superstrate and found that the gain of a. Ali a thesis submitted in partial fulfillment of the requirements for the degree of master of science in. The basics of patch antennas, updated orban microwave. It is clear from these figures that directivity has been improved by 6. In order to use this dng slab as a superstrate, the rectangular microstrip patch antenna has been designed to resonate at 31. Enhancement of quality of radiation pattern with modification. Study of the dielectric superstrate thickness effects on. Metamaterial superstrate antenna design with gain enhancement.
Metamaterial enhances microstrip antenna gain microwaves. This paper experimentally investigates the effect of a superstrate layer for. Here two different types of antenna have been made, one is 2 x 8 antenna array with superstrate and 4x8 antenna array without superstrate. The antenna comprises of single layer symmetrical metamaterial superstrate which is used to suppress surface waves based on. The measured radiation pattern of the antenna with and without metasurface are compared with the simulated results as shown in fig. Various gain enhancement methods like microstrip antenna array,superstrate structure, change in dielectric material and partial removal of. Effect of superstrate on a cylindrical microstrip antenna.
When the dng material is used as a superstrate directly touching the patch, the refection coefficient increased to 0. May 04, 2018 in this video, i have explained microstrip antenna or patch antenna by following outlines. Transformation optics based dielectric superstrate. The present invention provides a microstrip patch antenna and array antenna using dielectric superstrate in order to enhance the antenna gain by stacking radiating patches and dielectric layers. Radiation pattern improvement of a microstrip patch antenna using electromagnetic bandgap substrate and superstrate g. Fundamental specifications of patch antennas radiation pattern a patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. Antipodal radiation pattern of a patch antenna combined with. International journal of electronics and computer science. A microstrip patch antenna is a narrow band, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to. When the dng material is used as a superstrate directly touching the patch, the refection coefficient. Effect of two different superstrate layers on bismuth. Motivation for using circular patch type fss superstrate comes from the. Superstrate antennas for wide bandwidth and high efficiency.
Analysis and design of circular microstrip patch antenna at 5. It is conducted by optimising the dielectric superstrate parameters. Microstrip antenna or patch antenna basics in antenna and. In this paper, circular patch type fss has been used as a patch antenna superstrate. Wonkyu choi 5 presents the high gain patch array antenna using the superstrate layer where the layer affects its gain and resonant characteristics. Microstrip patch antenna design calculator 1 mosin i memon and 2 prof. In addition, the resulting distance between the antenna and the superstrate was h 0. The pattern synthesis based on the spectral greens functions for multilayered perforated dielectric loaded patch antenna is presented. Effect of dielectric protecting superstrate on radiation pattern of. Index termspatch antenna, hfss, dielectric superstrate, return loss, directivity. The microstrip patch antenna mpa placed on the top pyralux substrate layer is excited by means of a longitudinal. Gain enhancement of microstrip patch antenna using. The membrane antenna is designed using ansys hfss and consists of 6 layers. In this research, the his structure was introduced to suppress the surface wave of the microstrip antenna whereby the his elements were mounted around the radiating patch of the antenna.
Us6946995b2 microstrip patch antenna and array antenna. Watson research center, ibm, yorktown heights, ny 10598, usa email protected email. Pdf radiation pattern improvement of a microstrip patch. The effects of a protecting dielectric superstrate on the radiation pattern of an x band rectangular microstrip patch antenna have been studied experimenta. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. To achieve the lowprofile structure, the superstrate layer should be thin and thus of a single layer. A microstrip antenna consists of a radiating patch on one side of a dielectric substrate, which. Watson research center, ibm, yorktown heights, ny 10598, usa email protected email protected abstract this paper presents a balancedfed aperturecoupled patch antenna suitable for broadband millimeterwave communications. Patch antenna to observe the gain, directivity of the antenna. Microstrip patch antenna, rhcp, superstrate, hemispherical radiation pattern, return loss, ie3d simulation introduction lobal positioning systemgps is a satellite based network that. The main objective of this work is to enhance the gain and directivity of the metamaterial microstrip patch antenna used for wireless point to point communication applications like dedicated short range communications dsrc. Index termspatch antenna, hfss, dielectric superstrate, return loss, directivity, radiation pattern. Radiation pattern improvement of a microstrip patch antenna using electromagnetic bandgap substrate and superstrate article pdf available in wseas transactions on communications 61. Since this kind of prototype is very difficult to manufacture and hence we are going to.
Normalized radiation pattern for microstrip patch antenna. In this research, the his structure was introduced to suppress the. Radiation pattern improvement of a microstrip patch antenna. The directivity of patch antennas is approximately 57 db. Study of the dielectric superstrate thickness effects on microstrip. Us20100277374a1 antenna having metamaterial superstrate and. Abstractthis article presents a microstrip fed patch antenna array, loaded with metamaterial superstrate. Radiation pattern improvement of a microstrip patch. However, microstrip patch antennas have some shortcomings compared to nonplanar antennas, such as their narrow bandwidth, low gain and. Characterization of microstrip patch antennas suspended by. This design helps to enhance gain and efficiency of microstrip patch antenna at resonance frequency. The antenna under investigation the square patch antenna dimensions are wl2. This method is based on a series of investigations that correlate.
The design and the results of a single slot coupled substrate integrated waveguide siw fed membrane antenna loaded with a superstrate layer are presented for 94 ghz communication system. The return loss was also obtained at the same time and been analyzed. The fields are linearly polarized, and in the horizontal direction when viewing the microstrip antenna as in figure 1a well see why in the next section. Gain enhanced miniaturized microstrip patch antenna. The distance of 5 mm between superstrate layer with bit antenna patch is the optimum distance at which to obtain high gain and high directivity. Gain enhancement of patch antenna integrated with metamaterial. The present invention relates to a microstrip patch antenna and array antenna using a dielectric superstrate, and particularly to a microstrip patch antenna using a dielectric superstrate and an array antenna using the same, for a wireless communication base station, a wireless local area network, satellite communications and satellite broadcasting.
This paper compares the gain of a single patch with superstrate layers with that of a single patch without superstrate layers and reports the experimental results for 6element, bit, array antennas with and without a superstrate layer. Design high directive rectangular microstrip patch antenna. Improving microstrip patch antenna directivity using ebg. Design of microstrip patch antenna with superstrate for. A superstrate patch antenna for 60ghz applications duixian liu, johannes akkermans and brian floyd t. Equivalent material parameters technique was also used for efficient simulation of metamaterials in the substrate and the superstrate. High gain superstrate loaded membrane antenna based on.
Here the overview of air fed high gain patch antenna is presented. Rectangular patch antenna, circular patch antenna, square patch antenna, dielectric superstrate radome, resonate frequency, gain etc. Provided is antenna having metamaterial and providing gain improvement and beamforming together. Srr superstrate for gain and bandwidth enhancement of microstrip. Gain enhancement of microstrip patch antenna using dielectric dng superstrate by abdulbaset m. Gain enhancement of patch antenna using double negative. The present invention provides an antenna that includes a metamaterial superstrate and a metal wall surrounding a structure of the antenna that exhibits a high antenna gain and a low fronttoback ratio fbr over a wide band of frequencies and is capable of forming a beam having a desired width. Abstracta microstrip patch antenna can be readily installed on any. In this research, the superstrate layer was thus redesigned using the transmission matrix in. In figures 5 and 63d radiation pattern of the antenna without ebg superstrate and antenna with two layers ebg superstrate is shown. A new metasurface superstrate structure for antenna performance enhancement mohammad tariqul islam 1. The main objective of this work is to enhance the gain and directivity of the metamaterial microstrip patch.
Typical half wave patches have efficiencies well above 90%. Antenna 2 means the antenna design where only the metallic superstrate is. Controlling radiation pattern of patch antenna using transformation. Improved microstrip antenna with his elements and fss. The metamaterial superstrate antenna plays a major role for improving the gain of the antenna. Introduction microstrip antenna mpa is one of the most useful. So, if the designer has a clear conception about the effect of changing substrate material and its thickness on the performance of the antenna, it will be easier to design an antenna.
This antenna is found to be suitable for x band applications. The details of the proposed antenna design and results are presented in the following sections. A new metasurface superstrate structure for antenna. Superstrate antennas for wide bandwidth and high efficiency for 60 ghz indoor communications 99 fig. The impedance and radiation characteristics of a coaxiallyfed microstrip patch antenna suspended by a dielectric superstrate with high permittivity are extensively studied based on the. Microstrip patch antenna with fractal structure using. Gain enhancement of microstrip patch antenna using dielectric. The final structure has been achieved after three iterations. Isolation and gain enhancement of patch antennas using. Shafai2 1,2department of electrical and computer engineering, university of manitoba 75a chancellors circle, winnipeg. The fields are linearly polarized, and in the horizontal direction when viewing the. The simulation results of weight machine shape microstrip patch antenna. Obtained from the transformation electromagnetics technique, this superstrate enables to produce an antipodal radiation with a quasinull radiation in the broadside direction.