To design a microstrip patch antenna with the microstrip feed line insetfed work on for wifi 2. Microstrip antenna design with cst my antenna simulations. The top and bottom layers show the exponential taper profile, which is defined by the opening rate r and the two points p1 x1, y1 and p2 x2, y2 first and end points of the exponential taper. 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. And some technologies can achieve the miniaturization of the microstrip antenna xue and zhong, 2002. Patch antenna design tutorial with cst microwave electronic2017. Multiplefeed method can realize the circular polarization for a microstrip antenna. This antenna does not take any much extra size and can be etched on the same mobile pcb itself. An antenna radiation pattern or antenna pattern is defined as a mathematical function or a graphical representation of the radiation properties of the antenna as a function of space coordinates. In global positioning satellite gps systems, circularly polarised microstrip antennae are used. Microstrip patch antenna calculator patch antenna formula. Calculation of the dimension of the patch antenna, substrate, ground plane, effective dielectric constant, impedance etc. Microstrip antenna can adopt many methods to obtain circular polarization xue and zhong, 2002.
Microstrip patch antenna is used in mobile handset due to simple look, lower cost, small size and light in weight. There are a a lot of methods for analysis microstrip patch antenna. The fundamentals of patch antenna design and performance. Analysis of micro strip patch antenna using coaxial feed. The optimizer tries to minimize the sparameter data. Following equations or formula are used for this microstrip patch antenna calculator. I need to find the minimum level that the s1,1 db can be reached, but when i use the minoperator in the optimizer,it means.
Embedded in the same cst user interface, cst ems features a variety of solver module to tackle electrostatics, magnetostatics, current flow and low frequency problems, and can be coupled to other cst studio suite modules for charged particle and multiphysics simulations. But illustrates sizes and importance of good antenna design why microstrip antennas. The microstrip patch antenna is a popular printed resonant antenna for narrowband microwave wireless links that require semihemispherical coverage. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Sband patch antenna cubesat module cubesat by endurosat. Design of ultra wideband circular patch monopole antenna. Due to its planar configuration and ease of integration with microstrip technology, the microstrip patch antenna has been heavily studied and is often used as elements for an array. Increase of a patch bandwidth is achieved by utilizing a dcp feed, as shown in fig. Designed and simulated by cst computer simulation technology. The basics of patch antennas, updated orban microwave. The antenna is attractive due to its lowprofile conformal design, relatively low cost and very narrow bandwidth. This mobile microstrip patch antenna design can also be applied to all the other frequency bands in the similar way as outlined here.
Readers can visit the first part or the third part below1st part patch antenna design with cst microwave calculation of dimensions 3rd part inset fed patch antenna simulation and result. This method employs ground plane between two substrates. Microstrip square patch antenna using cst by shamsur rahman akash shamsur rahman akash. Microstrip patch antenna design santa clara university. The patch is generally made of conducting material such as copper and gold wikipedia, 2010. D structure wrapped around a cylinder, for example, it is usually flat and that is why patch antennas are sometimes referred to as planar antennas. A swpvar element is used in the em schematic to sweep the value of n, so the effects of a 2h, 5h, and 8h substrate extension are compared. In this example, the amount the substrate extends beyond the antenna edge is parameterized as a multiple n of substrate height h. The antenna design can be simulated and results are optimized using rf and microwave antenna design softwares such as ie3d, ansof, cst etc. This antenna is often built of printed circuit board material and the substrate makes up the.
Our sband antenna ism is a high gain left hand circularly polarized antenna. The microstrip patch antenna is used in a wide range of applications since it is easy to design and fabricate. It is clearly seen from the figure 6 that the antenna vswr is below. For feeding the microstrip patch antenna, there are different methods for example, feed line method, coaxial. Feed line distributes rf power to different part of antenna. This polarization can be either vertical or horizontal depending on the orientation of the patch.
Microstrip antenna has been used in every field, due to its many advantages. A finite size ground plane with a thicker substrate is located about 10mm 0. Readers can visit the first part or the third part below. Cst em studio cst ems is dedicated to the simulation of static and low frequency devices. Now, on the other hand without proper design, when you place any scatteringradiating structure too close to the ground plane e. Note that a planar antenna is not always a patch antenna. However, the most attractive feature of this design is its form factor.
Mobile microstrip patch antenna basics and design rf. This antenna is often built of printed circuit board. Cst beginners tutorial for microwave antenna design youtube. Before building antennas, people can use these softwares to. Axial ratio bandwidth of a circularly polarized microstrip. Generally, patch antenna has a shape of rectangle, and it can be feed with copper cable. With this free edition, you have access to our powerful visualization engine and some of the most advanced solvers of cst studio suite with some restrictions related to the student edition. Sl t j ti cstmws initial setup select new project in cst mws. Microstrip square patch antenna using cst by shamsur. The design is based on the transmission line model and is simulated in cst. Minimizing the sparameter data means that the optimizer tries to find a parameter setting where the. Design of microstrip antenna in cst microwave studio.
The overall design steps for designing the patch antenna in cst microwave studio involves 1. Another example of patch antenna is antipodal vivaldi antenna. Patch antenna design tutorial with cst microwave this is a tutorial series on microstrip patch antenna design with inset feed in cst microwave. A slot will be placed on the ground plane and feed line will be placed on lower substrate. Analysis of micro strip patch antenna using coaxial feed and. Microstrip patch antenna design linkedin slideshare. Typical antennas designed for the microwave range are quite large in size, which makes them. Getting started with cst microwave studio duration. Effective antenna simulations using cst microwave studio r. This is the second part of the inset fed patch antenna design tutorial using cst microwave studio.
Example probe feed patch antenna ansoft high frequency structure simulator v10 users guide 5. Introduction microstrip antennas basically consist of a radiating patch on one side of a dielectric substrate, which has a ground plane on the other side. How to find impedance at edge of a microstrip patch in cst. While the antenn a can be 3 d in structure wrapped around an object, for example, the elements are usually flat. Of course, tradeoffs also occurs, so you must be careful. The patch antenna is a good place to start for antenna fundamentals with more coming. Optimization of sparameters of microstrip patch antenna in cst.
The antenna has been designed and simulated using cst microwave studio 2010. Design and simulation microstrip patch antenna using cst. The geometry of micro strip patch antenna is shown in fig. Optimization of sparameters of microstrip patch antenna. Our main research topic in this chapter was how to improve the axial ratio bandwidth of a circularly polarized microstrip antenna. 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. For example, satellite communication requires circularly polarised radiation patterns, which can be realised using either square or circular patch microstrip antenna. Microstrip square patch antenna using cst by shamsur rahman akash duration. If you want to derive the patch edge impedance on higherorder modes, then you must choose a waveguide port with respect to the size of it, mentioned in cst s help.
The project here provides a detailed study of how to design a probefed square microstrip patch antenna using hfss, v11. Confirm environment air 6 lisbon, it, 22 march 2010 ieee communications society portugal chapter. Mobile microstrip patch antenna basics and design rf microwave. Patch is a radiating element and it can be available in different shapes like square,rectangular,circular,triangular etc. Now when that happens, the usual microstrip patch antenna analysis comes in. The patch is generally made up of a conducting material such as copper or gold and can take any possible shape like rectangular, circular, triangular, elliptical or some other common shape. Antenna is characterized by quite wide bandwidth due to its design. Simulated antenna vswr of proposed monopole antenna. Inputting the parameter obtained into the cst microwave studio, draw the substrate, ground plane, patch antenna, gap between. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. The cst studio suite student edition introduces you to the world of electromagnetic simulation, making maxwells equations easier to understand than ever.
Introduction to antenna and nearfield simulation in cst. Pdf cstpatch antennaexample dushyant sharma academia. It also provides, given a beamwidth, the inner and outer radii of beams coverage. In this part of the tutorial, we will use the dimension calculated in the first part to design the patch antenna in cst microwave studio. Hfss from ansoft and cst microwave studio are very popular computer softwares that are used for antenna models design. A transmit antenna needs a receiving antenna with the same polarization for optimum operation. The patch antenna performs reasonably well in terms of return loss and radiation efficiency. Antenna simulation models used in my researches and projects. Additional benefits of patch antennas is that they are easily fabricated making them cost effective.