Patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. In this case, each vector starts at the origin and lies along the specified points on the x, y, and zaxes. This polarization can be either vertical or horizontal depending on the orientation of the patch. Our focus in this paper on specifically increasing the bandwidth of lowprofile antennas and in particular the microstrip patch antenna. The height of the ground which is beneath the substrate and made of fr4 material is taken to be three times the thickness of substrate for simulation purposes i. Figure 5 patch antenna a simple measurement using a network analyzer showed the center frequency at 1.
The fundamentals of patch antenna design and performance. A microstrip patch antenna is one of the most popular microwave antennas. Microstrip patch antenna design linkedin slideshare. And the effect of the coaxial cable, the changes of the. This is a video tutorial on how to design a rectangular patch antenna using ansoft hfss. This rectangular microstrip patch antenna is designed for wireless communication application that works at 2. Our patch antenna was designed based upon an ideal rectangular patch antenna. But illustrates sizes and importance of good antenna design why microstrip antennas.
A wideband single layer coaxially fed rectangular microstrip patch antenna with a double uslot on the patch is presented. Microstrip patch antenna design santa clara university. The rectangular patch antenna is a lowprofile antenna composed of a patch of metal mounted onto a substrate that is backed by a metallic ground plane. Patch antenna calculator file exchange matlab central. It also has a wide angle of beam in its radiation pattern. Performance analysis of corporate feed rectangular patch. The fr4 dielectric board as well as the soldered sma connectors were supplied by the chamber lab. The conventional patch antenna is used as a reference for comparison with the stripeground antennas. The coaxial probe is an inner conductor that is passed through out a substrate, and it is connected to an antenna to make it radiating. The width for each was held constant but calculated based upon 1.
Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e. The final constructed antennas are shown in figures 3 and 4. It consists of rectangular substrate and the metal trace layer as shown in fig. The antennas are supported by a rotating mount structure. The rectangular patch antenna is designed so that it can operate at the resonance frequency. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board.
First the model of the microstrip patch antenna has to be drawn in hfss. Alternate feed methods a common variation in patch antenna design is the location and routing of the feed, to obtain a desired feedpoint impedance, to. It is mounted on a small, rectangular, flat surface and consists of two metallic plates placed upon each other. Patch antennas are low cost, have a low profile and are easily fabricated. If the ratio lw is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. Design and simulation of rectangular microstrip antenna arrays for. The project here provides a detailed study of how to design a probefed square microstrip patch antenna using hfss, v11. The use of slotted patch reduces the size of antenna and higher. All of the parameters in a rectangular patch antenna design l, w, h, permittivity control the properties of the antenna. The length of the patch for a rectangular patch antenna normally would be 0. If the dielectric constant of the material is not known, you can choose to put in the velocity of. Design of rectangular microstrip patch antenna part 1 matlab calculation duration. It is used in applications from mhz to thz frequencies when size, weight, cost, reliability, and aerodynamic performance are constraints.
Rectangular microstrip patch antenna for wireless communications at 6. The dimensions of antenna can be found in the hfss simulation file. The patch antenna is a good place to start for antenna fundamentals with more coming. The performance parameters were achieved with return loss 16. When mounted on electrically large objects, such as the. Name is the property name and value is the corresponding value. A design of rectangular patch antenna with fractal slots. P, india abstract here we made an attempt to maximize the gain of microstrip patch antenna. The rectangular patch antenna radiates by utilization of a coaxial feeding probe technique, which is an extremely co mmon 4, 7. Dimensions of rectangular patch antenna ground size 17. Patch antenna category is a curation of 10 web resources on, experimental patch antenna, patch antenna for apt, the basics of patch antennas.
Improving bandwidth rectangular patch antenna using. Single element rectangular microstrip patch antenna. It consists of a flat rectangular sheet or patch of metal. The major problems of the single element microstrip antennas are low gain and narrow bandwidth which limit their wide applications. Recent computeraided design techniques for rectangular. You can specify several namevalue pair arguments in any order as name1, value1.
Click here to go to our page on circular patch antennas new for september 2018. Microstrip antennas are becoming very widespread within the mobile phone market. With proper dimensions for the second uslot bandwidth as high as 49. Characteristics of the rectangular patch antenna microstrip patch. This paper introduces a ka band antenna candidate for small satellite communications. Both a single patch antenna and patch antenna array were fabricated using the milling machine in cal polys chamber lab. Sep 18, 2017 this is a video tutorial on how to design a rectangular patch antenna using ansoft hfss. Patch antenna design gareth louis shaw a dissertation submitted to the faculty of engineering and the built environment, university of the witwatersrand, johannesburg, in ful. As such, this page gives a general idea of how the parameters affect performance, in order to understand the design process. Directional patch antenna array design for desktop wireless.
Directional patch antenna array design for desktop. For designing the antenna fr4 epoxy substrate with thickness 1. Improving bandwidth rectangular patch antenna using different. Now, i want to wrap the antenna on a cylindrical surface and. Thus the design and simulation of microstrip rectangular patch antenna was successfully designed and analyzed using ansoft hfss.
In this work, the simulation tool of ie3d is used to study the performance and gain of the rectangular microstrip patch antenna. The conventional patch antenna equations were taken from 10 and 11 asmention previously in chapter 2. When air is used as the dielectric substrate, the length of the rectangular microstrip antenna is approximately onehalf of a freespace wavelength. The most commonly employed microstrip antenna is a rectangular patch which looks like a truncated microstrip transmission line. The antenna radiation reflected lesser in antenna with fss layer by 7. The antenna was constructed using copper tape as a conductor, foam as a substrate and an aluminum sheet as the ground plane. The empirical formula for input impedance of the circular patch antenna on thick substrate is developed and a circular patch millimeter wave antenna is designed for 39 ghz on thick substrate. The characteristics of microstrip patch antennas, microstrip sot antennas and printed dipole antennas are compared in table 1.
Design of a rectangular microstrip patch antenna using. Properties not specified retain their default values. Analysis and design of circular microstrip patch antenna at 5. A 28 ghz rectangular patch antenna with parasitic element for. A design of rectangular patch antenna with fractal slots for. The basics of patch antennas, updated orban microwave. First, the length of the patch l controls the resonant frequency as seen here. For rectangular patch elements there are two degrees of freedom to control whereas for the circular patch elements there is one degree of freedom to control. Rectaangular microstrip patch antenna for wireless. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Coaxialfed rectangular patch antenna lumerical support. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. The results obtain that microstrip patch antenna can be used as client antenna in computer and workable antenna for wireless fidelity. Hfss design of rectangular patch antenna using microstrip.
Microstrip patch antenna calculator electrical engineering. Its application is in k band and in x band frequency range because it is dual band. The patchmicrostrip object is a microstrip patch antenna. A general twodimensional 2d representation of a patch antenna is given in figure 1. Note that a quarterwave length transformer was used to match the patch to a 50 ohm feed line. In modern microwave systems, rectangular microstrip patch antennas rmpas are. Typical half wave patches have efficiencies well above 90%. The design and simulation of patch antennas is widely used in mobile cellular phones today, and our emphasis in this work is on optimization of a 2. The design of rectangular patch antenna with fractal slots is presented in this paper. Now, i want to wrap the antenna on a cylindrical surface and simulate using hfss tool. A rectangular patch was chosen for this project because it provides linear polarization, which will allow for the best communication with wireless routers which use linearly polarized dipole antennas. The microstrip patch antenna calculator determines the length l and width w of a rectangular microstrip patch antenna for a given resonant frequency or vice versa.
We use a simple rectangular, half wave long, probefed patch operating in its fundamental mode as an example. Patch antennas were used because of their ease of integration with printed circuit board pcb technology. One plate is larger than the other, which is called ground plane and. This is a gui for calculating the design parameters and plotting the radiation characteristics of a rectangular patch antenna. The resonant frequency used for designing the proposed antenna is 2ghz. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. Proposed array antenna is designed with a rectangular patch antenna with slots made at patch for better result. Microstrip or patch antennas are becoming increasingly useful because they can be printed directly onto a circuit board. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. A patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. A patch antenna is a lowprofile directional radio antenna that is used for indoor locations covering singlefloor offices, stores and small studios. Design rectangular patch antenna using hfss part 1 youtube. Analysis and design of rectangular microstrip patch.
This tool is designed to calculate the correct dimensions of a microstrip patch antenna if the operating frequency and the dielectric constant of the material used, is known. Initially two rectangular patches were designed, one for each desired frequency. Introduction this article introduces the basic concepts of patch antennas. Jun 23, 2008 this is a gui for calculating the design parameters and plotting the radiation characteristics of a rectangular patch antenna. The aim of the project is to design a rectangular microstrip patch antenna with enhanced gain and bandwidth and study the effect of antenna dimensions length l, width w and substrate parameters relative dielectric constant. Abstract due to the existence of growth in development of low cost, less weight, highly reliable, minimal profile antennas for wireless. Pdf rectangular patch antenna array design at ghz. The directivity of a patch can be estimated quite easily. Three iteration of proposed antenna is designed and simulated by. Threeelement vectors of cartesian coordinates in meters. Circular patch element configuration is the circular patch or disk. The design is a compact rectangular patch antenna with inset feed and. Alternate feed methods a common variation in patch antenna design is the location and routing of the feed, to obtain a desired feedpoint impedance, to control the polarization, or for convenient layout. Jan 04, 2017 design of rectangular microstrip patch antenna part 1 matlab calculation duration.
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