The method is demonstrated for closely packed hplane microstrip patch antennas. Introduction recently there has been an increase in demand for wireless sensors in civil engineering applications. A microstrip antenna consists of a radiating patch on one side of a dielectric substrate, which has. Normally, the microstrip antenna suspended with the arti. These are the dimensions of the microstrip antenna. Transmission line theory and microwave applications. It acts as a superstrate layer loaded on microstrip patch antenna. Conclusion this paper introduced experimentally the effect of a superstrate layer for high gain on a microstrip patch antenna.
Reflection coefficient of rectangular patch antenna only 10%. The intended application is simultaneous sensing of ash accumulation and temperature inside a boiler, with the aim of enhancing safety, improving efficiency. Study of the dielectric superstrate thickness effects on microstrip. Superstrateintegrated switchable beam rectangular microstrip. Us6946995b2 microstrip patch antenna and array antenna. In this article, a dual band microstrip antenna design based on characteristic mode analysis cma using mtm superstrate is proposed for 5g wireless communication. This paper investigates a microstrip patch antenna for measuring the thickness and dielectric constant of the medium above the antenna i. Design of microstrip patch antenna with superstrate for.
Improved microstrip antenna with his elements and fss. Isolation and gain enhancement of patch antennas using emnz. Magnetodielectrics are materials that can be polarized. When circular patch microstrip antenna with the dielectric superstrate or radom is shown in figure 3. Controlling radiation pattern of patch antenna using transformation.
The proposed metasurface superstrateloaded antenna shows inphase reflection of the. The effect of changing substrate material and thickness on. To enable proper measurement of the antenna in the 60ghz frequency band, a balun is used to convert the 100 ohm differential feed to a 50 ohm microstrip line. It is clear from these figures that directivity has been improved by 6. Design of high gain, wideband microstrip resonant cavity. In this letter, we proposed a comparative study of a rectangular microstrip patch antenna at terahertz thz frequency ranging from 0. Em analysis of a microstrip patch antenna mpa loaded with frequency selective surface fss based superstrate is presented in this paper for directivity enhancement. When a microstrip antenna is covered with a superstrate dielectric layer, its properties like resonance frequency, gain and bandwidth are changed which. The 16 element array antenna has been designed and constructed by using proximity coupled feeding technique. Further enhancement in the gain will be done by increasing the size of the antenna with array of patches. In 8, a microstrip patch antenna using a single layer of metamaterial superstrate with a zero refractive index was investigated. Study of the dielectric superstrate thickness effects on.
Also, this letter explains a comparison to another source of parasitic patch superstrate antenna with normal microstrip coupling. Request pdf triple band circular patch microstrip antenna with superstrate a novel compact triple band slit cut circular patch antenna with superstrate is proposed. The antenna is designed for 100 ohm differential impedance. Analysis and design of circular microstrip patch antenna at 5. Effect of superstrate on a cylindrical microstrip antenna. Dielectric layer to match antenna superstrate assembly at design frequency 68. It is also shown that the presence of the ebg superstrate is very efficient for improving the radiation directivity. Microstrip patch antenna and the feed line shares a common ground plane. P, india abstract here we made an attempt to maximize the gain of microstrip patch antenna.
Sarwar hosain 2, sohag sarker 2, makhluk hossain prio 3, monir morshed 4, ajay krishno sarkar 3. In this antenna the radiation from the microstrip patch array antenna is primarily because of the fringing field between the patch edge and ground plane. A superstrate for microstrip patch antennas ieee xplore. High gain microstrip antenna design by using fss superstrate.
Antenna, dielectric superstrate, microstrip patch, protection, rdec. In proposed paper we studied both electromagnetic bandgap structure and a superstrate to increase the bandwidth. The dielectric material used underneath the patch is arlon diclad with. 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.
A new metasurface superstrate structure for antenna. Gain enhancement of microstrip patch antenna using dielectric dng superstrate by abdulbaset m. Gain enhancement of microstrip patch antenna using dielectric. Investigation on wideband eshaped microstrip patch antenna with. Srr, extracted using the effective medium theory, are also discussed in this. At that time, veselagos theory did not find popularity in the physics.
But several advantages are gained by using a superstrate over the microstrip antenna. Directivity enhancement of microstrip antenna loaded with fss. Pdf radiation pattern improvement of a microstrip patch antenna. An microstrip antenna msa 1 in its simplest form consists of a radiating patch on one side. Pdf a new metasurface superstrate structure for antenna.
Study of a microstrip antenna with and without superstrate. Isolation and gain enhancement of patch antennas using. Patterns are somewhat hemispherical, with a moderate directivity about 68 db is typical. Investigations on wideband uslot microstrip patch antenna. Study of antenna superstrates using metamaterials for.
Pdf in this letter, we proposed a comparative study of a rectangular microstrip patch antenna at terahertz thz frequency ranging from 0. Jun 03, 2015 in order to design a microstrip patch antenna at first the designer is to select the substrate material and its thickness. We measured the gain of antennas with and without a superstrate and found that the gain of a patch antenna with a superstrate was enhanced. Enhancement of gain of rectangular micro strip antenna. Gain enhancement for microstrip reflectarray using. The use of metamaterials in single or multiple layers has been shown to contribute a great deal to the design of a highgain microstrip antenna at 10. Through introducing an interdigital capacitor idc in the patch, a planar metamaterial mtm unit cell in the ground plane and cutting two vertical slits from the slot, size reduction of the. The effect of changing substrate material and thickness on the performance of inset feed microstrip patch antenna. The cma is used for the modelling, analysis and optimization of the proposed antenna to examine the underlying modal behaviour of the mtm unit cell and to guide mode excitation. Concrete superstrate the geometry of a microstrip antenna with concrete used as a cover layer is shown in fig. Metamaterial enhances microstrip antenna gain microwaves. Further to improve the performance of superstrate loaded antenna, patch slots and ground defects have been proposed. The electric field distribution of the conventional microstrip antenna behaves like a hemispherical shape above the radiator. This region is enlarged by fss cell of the superstrate layer.
This paper experimentally investigates the effect of a superstrate layer for high gain on microstrip patch antennas. Easy to incorporate with other microstrip circuit elements and integrate into systems. The superstrate cover of dielectric layer provides protection to printed circuit antenna from environmental hazards due to abnormal weather conditions. In this case, the measured maximum gain of the patch antenna with fss superstrate is 16. A fss structure of square patches proposed by is shown in figure 5a, and the distance between the fss superstrate and the microstrip antenna ground plane is about 15 mm. Index termseshaped patch antenna, superstrate, bandwidth and axial.
For efficacy of the approach, the radiation characteristic of a rectangular mpa is validated with that of reported. In 10, 11, the amc was mounted around the radiation source and fss superstrate can easily fabricate. Abstractthis article presents a microstrip fed patch antenna array, loaded with. First, the simulation was carried to a simple microstrip antenna, was then added an upper layer superstrate by varying the height to improve impedance matching and optimizing the performance of the antenna. Adielectric superstrate is touching the patch antennas has. Triple band circular patch microstrip antenna with superstrate. Metamaterial superstrate microstrip patch antenna for 5g. Under unloaded conditions, the conventional patch antenna array resonates at ieee 802.
This double layer metasurface enhance the antenna gain and directivity that is mainly used for dsrc application. The radiating element with broadband and high radiation. With the help of ray theory, the paper analyzes the work mechanism of the new antenna. A high directivity wideband resonant cavity antenna rca is proposed in which a compact wideband microstrip patch antenna mpa is utilized as radiator. Ebg structure and a dielectric layer over a microstrip patch antenna have remarkable effect on its input characteristics and bandwidth. Nov 12, 20 a novel compact triple band slit cut circular patch antenna with superstrate is proposed. A printed rampartline antenna with a dielectric superstrate. It is found that aperture coupling is better for highgain antenna.
A new metasurface superstrate structure for antenna performance enhancement. The patch is etched on top surface of a grounded substrate, and a coupled patch is on top 11 or bottom 12 surface of the superstrate. The slits add two resonances in the resonance of a circular patch to achieve triple band antenna for. The proposed antenna is analyzed based on transmission line analogy and reciprocity theorem. In addition to providing more than 6db gain compared to a conventional microstrip antenna, these metamaterialequipped antenna designs also feature increased bandwidth from 3. The overall performance is degraded by slightly after the use of superstrate. The emnz superstrate is placed at a height of 10 mm equivalent to. Singh and jasmine saini abstracta microstrip patch antenna can be readily installed on any nonplanar surface due to its conformal property, and this feature enhances its applicability in many areas. In order to present the design procedure of antenna achieving impedance matching for the case, the first prototype of the antenna was designed using arlondiclad 880 substrate resonating at 2. Design high directive rectangular microstrip patch antenna. Dec 20, 2015 it acts as a superstrate layer loaded on microstrip patch antenna.
The patch antenna without superstrate has a bandwidth of 0. The characteristics of antenna parameters change as a function of the dielectric superstrate layer. In12,themicrostrip antenna ma with interdigital capacitance fss super. Directivity enhancement of microstrip antenna loaded with. A new metasurface superstrate structure mssloaded dual band microstrip linefed small patch antenna is presented in this paper. Fss structures can also be used as antenna superstrate to enhance antenna directivity.
The simulation results indicated that the real effective permittivity and permeability of the pcd were both negative in the 2. Srr superstrate for gain and bandwidth enhancement of microstrip. 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. A novel compact triple band slit cut circular patch antenna with superstrate is proposed. Pdf study of a microstrip antenna with and without superstrate for. Ali a thesis submitted in partial fulfillment of the requirements for the degree of master of science in electrical engineering approved by. Design of multidielectric layer microstrip antenna and superstrate effects the multilayer microstrip antenna structure involves addition of a superstrate layer over the substrate. 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. The superstrate can provide protection against heat, physical damage, the environment and also increases the peak powerhandling capability of the antenna 18.
A dielectric superstrate layer above a microstrip patch antenna has remarkable effects on its gain and resonant characteristics. This paper focused on the coaxial probe fed square patch microstrip antenna characteristics have been studied with and without dielectric superstrates. Gain enhancement of microstrip patch antenna using. The properties of a microstrip antenna with dielectric superstrate layer have been studied theoretical. This paper presents the effect of the dielectric superstrates on bandwidth and gain of uslot microstrip patch antenna without superstrate and loaded with superstrates. Microstrip patch antenna for simultaneous temperature. Placing the patch antenna against concrete reduces the resonant frequency.
The dielectric constant of the substrate and superstrate material is used same for designing of square microstrip patch antenna. Jul 29, 2016 high antenna gain is generally desirable for communications systems, whether terrestrial or based on satellites. Abstracta microstrip patch antenna can be readily installed on any. The microstrip patch antenna using a dielectric superstrate for having high gain and wide bandwidth, includes. Improving microstrip patch antenna directivity using ebg. The antenna described here is a probefed square microstrip patch antenna covered by a dome shaped superstrate designed to operate at a frequency of 1.
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