These methods are classified into two types contacting and noncontacting. While for the gap between feed line and patch is 0. The dimensions of antenna can be found in the hfss simulation file. We use a simple rectangular, half wave long, probefed patch operating in its fundamental mode as an example. Study the various feeding techniques of microstrip antenna using.
The inset feed technique is used for the matching between. A patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. Typical radiation pattern of microstrip antenna 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. Design and simulation microstrip patch antenna using cst microwave studio. Diagram of the feed structure of a microstrip antenna array. Request pdf design of microstrip patch antenna with inset feed in cst for ebs channel in this research paper, the authors have designed. The dielectric constant that controls the resonance of the antenna. Microstrip antenna an overview sciencedirect topics. Generally, patch antenna has a shape of rectangle, and it can be feed with copper cable.
Patch antenna design tutorial with cst microwave electronic2017. Microstrip patch antenna designed using cst microwave studio the antenna is being excited with the coaxial feed point located at distance dx and dy from the centre of the patch. 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. Note that a quarterwave length transformer was used to match the patch to a 50 ohm feed line.
Hi guys, i am trying to feed a microstrip patch antenna with a coaxial probe feed. The image below shows two ways to feed the microstrip patch, on the left is a microstrip feed and on the right is a coax feed. Microstrip patch antennas can be fed by a variety of methods. The width of the microstrip patch antenna is given in equation 1. I want to design a patch antenna b y using cst software but i am facing a problem with boundaries conditions. In this research paper, the authors have designed a microstrip rectangular patch antenna used in educational broadcasting service ebs. How to find exact feeding position in a microstrip patch. To design a microstrip patch antenna with the microstrip feed line insetfed work on for wifi 2. In both cases, the antenna prototypes were fabricated. Microstrip patch antenna parameters, feeding techniques and. Microstrip antenna design with cst my antenna simulations. The patch cutout for the feed inset should be 2 times the microstrip width. Selecting best feeding technique of a rectangular patch. Study the various feeding techniques of microstrip antenna using design and simulation using cst microwave studio.
Microstrip patch antenna with coaxial feeding using cst. The dimensions calculated earlier and information obtained from the manufacturer is listed belowparameters. After finding the patch size the antenna feed line should be designed. It consists of rectangular substrate and the metal trace layer as shown in fig. Cst studio suite is a highperformance 3d em analysis software package for designing, analyzing and optimizing electromagnetic em components and systems. Since the length of the patch has been extended by. In the contacting method, the rf power is fed directly to the radiating patch using a connecting feed. Till now i m getting nothing although i have read the circular patch antenna tutorial provided in the help manual. Design of a rectangular microstrip patch antenna using inset. It can be seen from table 1 tha selection of the feeding technique for a microstrip patch antenna is an important decision because it affects the bandwidth and other parameters. Design of a rectangular microstrip patch antenna using.
This means that on each side of the feed line there should be a distance of 12 the microstrip width on each side of the microstrip between the microstrip feed line and the patch antenna. Because the free student version of cst suite has limitations there initially was some concern if the modelled results could be realised in practice. A microstrip antenna array for a satellite television receiver. Microstrip patch antenna with coaxial feeding using cst simulator arabic duration. The patch antenna array consists of four elements with rectangular patch and uniform distribution. A finite size ground plane with a thicker substrate is located about 10mm 0. For a given frequency, the gain is proportional to the diameter. First the model of the microstrip patch antenna has to be drawn in hfss. Increase of a patch bandwidth is achieved by utilizing a dcp feed, as shown in fig. Typical half wave patches have efficiencies well above 90%. Previously, the patch antenna was fed at the end as shown here. The antenna is attractive due to its lowprofile conformal design, relatively low cost and very narrow bandwidth.
Circular microstrip patch antenna using coaxial feed for s. If you feed it at the edge you see an open circuit, because you are a halfwave from another open. Microstrip patch antenna design principles ben horwath. Following equations or formula are used for this microstrip patch antenna calculator. Antenna structures two 16element microstrip patch antenna arrays have been designed and compared. In designing rectangular microstrip patch antenna using line feed, we use equation from eq.
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. In telecommunication, a microstrip antenna also known as a printed antenna usually means an antenna fabricated using microstrip techniques on a printed circuit board pcb. Is there any specific rules for giving waveguide port in microstrip line in cst. Microstrip square patch antenna using cst by shamsur.
Microstrip patch antenna with coaxial feed using cst mws part 2. Design and simulation microstrip patch antenna using cst. Antenna designing using cst computer simulation technology this video explains the use of cst for rf application to design patch antenna. Design and analysis of microstrip patch antenna arrays. Thus the element and feed line, and usually other elements, power dividers, etc. Wf and lf are the dimension of the microstrip line. Rectaangular microstrip patch antenna for wireless. But illustrates sizes and importance of good antenna design why microstrip antennas. The return loss and the various gain plots have been studied along with the radiation patterns.
Table 1 demonstrates the physical parameter and optimization that might be. Analysis of micro strip patch antenna using coaxial feed and. The most widely used printedcircuit antenna is the microstrip patch, which in its simplest form is a rectangular or circular patch of metal fed by the microstrip upper conductor. The radiation pattern of this combination is shown in figure 1. Design of microstrip patch antenna mpa in cst mws full hd duration. The top metallic flat region, which is called the patch antenna, sits on a dielectric substrate. Electromagnetic field solvers for applications across the em spectrum are contained within a single user interface in cst studio suite. Design and performance analysis of microstrip patch. The patch is generally made of conducting material such as copper or gold and can take any possible shape.
Without a reasonable impedance match, the antenna will not radiate much, if any, power. Patch antennas and microstrip lines 51 amount of power that is transferred to the load or the amount of power reflected back. The basics of patch antennas, updated orban microwave. Also proper way to feed a radiator as per real time devices during test. The most common type of microstrip antenna is the patch antenna. It is widely used in both one patch antenna and multipatches array antennas. International journal for research in applied science. The antenna is designed by using following equation 1to 8. What dielectric constant defines the half wavelength.
Design of microstrip antenna in cst microwave studio. The overall design steps for designing the patch antenna in cst microwave studio involves 1. Eshail2 oscar 100 dual band patch antenna uhfsatcom. Microstrip patch antenna with coaxial feed using cst mws part 1. Introduction on microstrip patch antenna design rectangular microstrip patch antenna with microstrip feed line.
If you continue browsing the site, you agree to the use of cookies on this website. Patch antenna design tutorial with cst microwave this is a tutorial series on microstrip patch antenna design with inset feed in cst microwave. Antennas using patches as constitutive elements in an array are also possible. How can one design bottom feed microstrip antenna using cst microwave studio. A microstrip patch antenna excited by different excitation techniques gives different bandwidth, different gain, different efficiency etc. Iishape parameter are simulated rectangular microstrip patch antenna is being designed for radio and satellite applications and thus resonates in cband. The feed type and feed position of a patch antenna vary the input impedance. Both antenna structures are analyzed numerically using the computer simulation technology cst studio suite 2008 and experimentally. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. The fundamentals of patch antenna design and performance. This antenna does not take any much extra size and can be etched on the same mobile pcb itself. How can one design bottom feed microstrip antenna using cst.
Hfss from ansoft and cst microwave studio are very popular computer softwares that are used for antenna models design. Introduction this article introduces the basic concepts of patch antennas. Microstrip patch antenna is used in mobile handset due to simple look, lower cost, small size and light in weight. The proposed patch antenna was designed and all the mulated using computer simulation technology cst microwave studio 2014. The patch antenna is a good place to start for antenna fundamentals with more coming. A feed system supplies the rf power, and a ground plane is at the bottom of the patch antenna, sustaining the substrate. 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. Since the current is low at the ends of a halfwave patch and increases in magnitude toward the center, the input impedance zvi could be reduced if the patch was fed closer to the center. Before building antennas, people can use these softwares to. The radiating patch and the feed lines are usually photo etched on the dielectric substrate 1, 3. This is a tutorial series on microstrip patch antenna design with inset feed in cst microwave. Watching this will improve the basic simulation knowledge of beginers.
Since this typically yields a high input impedance, we would like to modify the feed. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Jun 01, 2015 design and simulation microstrip patch antenna using cst microwave studio slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Microstrip patch antenna calculator patch antenna formula. The microstrip patch antenna is used in a wide range of applications since it is easy to design and fabricate. Coaxial fed rectangular microstrip patch antenna for 5. Microstrip patch antenna design santa clara university. Optimally, you would like the input impedance of the antenna to match the source o. A patch antenna is a narrowband, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate, such as a printed circuit board, with a continuous metal layer bonded to the opposite side. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. It is known that the antenna impedance will be higher than an accepted value if fed from the edge, and lower if fed from the center. Cst studio suite 3d em simulation and analysis software.
Rectangular microstrip patch antenna using coaxial probe feeding. Most often, microstrip antennas are made by etching the patch from a printed circuit board with conductor on both sides. Microstrip patch antenna design for ku band application. Design of microstrip patch antenna with inset feed in cst for ebs. Probe feed effect in polygonal patch antennas ieee xplore. There are a a lot of methods for analysis microstrip patch antenna. In the case of a microstriplinefed antenna, where the source and the transmission line. Index terms wlan, coaxial feed, microstrip patch antenna msa, cst microwave studio. Design and performance analysis of microstrip patch antenna. Microstrip patch antenna is having four basic components in it and they are microstrip patch, dielectric substrate, ground plane and feed 1. The research paper published by ijser journal is about microstrip patch antenna parameters, feeding techniques and shape of the patch a survey, published in ijser volume 6, issue 4, april 2015 edition. This is the second part of the inset fed patch antenna design tutorial using cst microwave studio. Is there any specific rules for giving waveguide port in. Microstrip square patch antenna using cst by shamsur rahman akash duration.
Microstrip square patch antenna using cst by shamsur rahman akash. Microstrip patch antenna with coaxial feed using cst mws part 1 duration. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. Antenna using line feed the structure of this rectangular microstrip patch antenna is shown in fig. Microstrip patch antenna parameters, feeding techniques. The patch is selected to be very thin such that t jul 28, 2016 microstrip square patch antenna using cst by shamsur rahman akash. 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. The directivity of a patch can be estimated quite easily. Analysis of micro strip patch antenna using coaxial feed. In this work we have designed antenna using coaxial feed and microstrip line feed. How to design coaxial feed for conformal antenna in hfss or cst.
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