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. This mobile microstrip patch antenna design can also be applied to all the other frequency bands in the similar way as outlined here. This antenna is often built of printed circuit board. 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. Design of microstrip antenna in cst microwave studio. While the antenn a can be 3 d in structure wrapped around an object, for example, the elements are usually flat. Microstrip patch antenna calculator patch antenna formula. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. Confirm environment air 6 lisbon, it, 22 march 2010 ieee communications society portugal chapter.
It also provides, given a beamwidth, the inner and outer radii of beams coverage. How to find impedance at edge of a microstrip patch in cst. 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. This antenna is often built of printed circuit board material and the substrate makes up the. Hfss from ansoft and cst microwave studio are very popular computer softwares that are used for antenna models design. Calculation of the dimension of the patch antenna, substrate, ground plane, effective dielectric constant, impedance etc. Antenna downtilt and coverage calculator pasternack the antenna downtilt and coverage calculator aka antenna tilt angle calculator is used to determine the approximate downward angle, measured in degrees, which the transmitting antenna is to be positioned for optimal signal strength and coverage. However, the most attractive feature of this design is its form factor. Pdf cstpatch antennaexample dushyant sharma academia. Another example of patch antenna is antipodal vivaldi antenna. Now when that happens, the usual microstrip patch antenna analysis comes in. It is clearly seen from the figure 6 that the antenna vswr is below. The antenna has been designed and simulated using cst microwave studio 2010. The cst studio suite student edition introduces you to the world of electromagnetic simulation, making maxwells equations easier to understand than ever.
The antenna is attractive due to its lowprofile conformal design, relatively low cost and very narrow bandwidth. Following equations or formula are used for this microstrip patch antenna calculator. Design and simulation microstrip patch antenna using cst. Sl t j ti cstmws initial setup select new project in cst mws. Generally, patch antenna has a shape of rectangle, and it can be feed with copper cable. Patch antenna design tutorial with cst microwave electronic2017. Design and simulation microstrip patch antenna using cst microwave studio. 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.
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. Introduction to antenna and nearfield simulation in cst. A finite size ground plane with a thicker substrate is located about 10mm 0. Getting started with cst microwave studio duration. The geometry of micro strip patch antenna is shown in fig. A slot will be placed on the ground plane and feed line will be placed on lower substrate. 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. Typical antennas designed for the microwave range are quite large in size, which makes them. To design a microstrip patch antenna with the microstrip feed line insetfed work on for wifi 2. There are a a lot of methods for analysis microstrip patch antenna. 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.
Minimizing the sparameter data means that the optimizer tries to find a parameter setting where the. Cst beginners tutorial for microwave antenna design youtube. 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. The design is based on the transmission line model and is simulated in cst. Note that a planar antenna is not always a patch antenna. Our main research topic in this chapter was how to improve the axial ratio bandwidth of a circularly polarized microstrip antenna. A transmit antenna needs a receiving antenna with the same polarization for optimum operation. Antenna simulation models used in my researches and projects.
The patch antenna is a good place to start for antenna fundamentals with more coming. Readers can visit the first part or the third part below. Microstrip patch antenna is used in mobile handset due to simple look, lower cost, small size and light in weight. The basics of patch antennas, updated orban microwave. This polarization can be either vertical or horizontal depending on the orientation of the patch.
Additional benefits of patch antennas is that they are easily fabricated making them cost effective. Cst em studio cst ems is dedicated to the simulation of static and low frequency devices. The microstrip patch antenna is used in a wide range of applications since it is easy to design and fabricate. This is the second part of the inset fed patch antenna design tutorial using cst microwave studio.
Patch is a radiating element and it can be available in different shapes like square,rectangular,circular,triangular etc. The project here provides a detailed study of how to design a probefed square microstrip patch antenna using hfss, v11. 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. Microstrip square patch antenna using cst by shamsur rahman akash duration. Microstrip antenna can adopt many methods to obtain circular polarization xue and zhong, 2002. For feeding the microstrip patch antenna, there are different methods for example, feed line method, coaxial. Inputting the parameter obtained into the cst microwave studio, draw the substrate, ground plane, patch antenna, gap between. Optimization of sparameters of microstrip patch antenna in cst. And some technologies can achieve the miniaturization of the microstrip antenna xue and zhong, 2002. Microstrip antenna design with cst my antenna simulations. Before building antennas, people can use these softwares to. The fundamentals of patch antenna design and performance.
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. Of course, tradeoffs also occurs, so you must be careful. Our sband antenna ism is a high gain left hand circularly polarized antenna. Multiplefeed method can realize the circular polarization for a microstrip antenna. Optimization of sparameters of microstrip patch antenna. The microstrip patch antenna is a popular printed resonant antenna for narrowband microwave wireless links that require semihemispherical coverage.
Designed and simulated by cst computer simulation technology. Microstrip square patch antenna using cst by shamsur rahman akash shamsur rahman akash. The optimizer tries to minimize the sparameter data. Simulated antenna vswr of proposed monopole antenna. Mobile microstrip patch antenna basics and design rf microwave. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Effective antenna simulations using cst microwave studio r. For example, satellite communication requires circularly polarised radiation patterns, which can be realised using either square or circular patch microstrip antenna. The overall design steps for designing the patch antenna in cst microwave studio involves 1. But illustrates sizes and importance of good antenna design why microstrip antennas.
The antenna design can be simulated and results are optimized using rf and microwave antenna design softwares such as ie3d, ansof, cst etc. Microstrip patch antenna design santa clara university. Sband patch antenna cubesat module cubesat by endurosat. 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. Design of ultra wideband circular patch monopole antenna. Analysis of micro strip patch antenna using coaxial feed and.
This antenna does not take any much extra size and can be etched on the same mobile pcb itself. 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. The patch is generally made of conducting material such as copper and gold wikipedia, 2010. 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. Microstrip patch antenna design linkedin slideshare.
Microstrip square patch antenna using cst by shamsur. 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. Microstrip antenna has been used in every field, due to its many advantages. 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. Patch antenna design tutorial with cst microwave this is a tutorial series on microstrip patch antenna design with inset feed in cst microwave. Axial ratio bandwidth of a circularly polarized microstrip. In this example, the amount the substrate extends beyond the antenna edge is parameterized as a multiple n of substrate height h. The patch antenna performs reasonably well in terms of return loss and radiation efficiency. This method employs ground plane between two substrates. Feed line distributes rf power to different part of antenna.