Choose appropriate antenna type according to the application. For your antenna to show strong resonance the port signal should start at zero and after some resonance should tend towards zero. Analysis and design of ism band patch antenna array. Reconfigurable microstrip patch antenna for wlan software. Simulations with discrete face port usually provide the z11 matrix which is the impedance seen from the port location towards patch, and in this case, its the edge impedance of a rectangular patch. Simulation of a body above antenna copy e and h planes radiation patterns. Cst studio suite is a highperformance 3d em analysis software package for designing, analyzing and optimizing electromagnetic em components and systems. Abstracta circular polarized patch antenna for the 5. Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e. The next step then was to design the patch antenna with accurate dimensions so that it would resonate at the.
Is there any specific rules for giving waveguide port in. Structurally robust and light weight a microstrip antenna msa in its simplest form consists of a radiating patch on one side of a dielectric substrate and a ground plane on the other side. A novel rectangular microstrip patch antenna for ultrawidebanduwb applications is proposed. Chapter 4 consists of a short introduction to cst microwave studio software. After designing rectangular patch antenna a discrete port is connected at the left most.
What is the process involved in the design of a microstrip. If you want to design a patch to operate on dominant tm10 mode, you must choose a discrete face port with a width equal to the patchs width. Microstrip patch antenna with coaxial feed using cst mws part 1. There are few basic things that must be known before designing an antenna in general such as. Quick example patch antenna rogers rtduroid 5880 chosen. In present, i meet aproblem about the discrete port in cst mws. Design and simulation microstrip patch antenna using cst microwave studio 1. It is a popular printed resonant antenna for narrowband microwave wireless links that require semihemispherical coverage. Cst antenna simulation and engineering designchinese edition. Microstrip antenna design with cst my antenna simulations.
Design of miniaturized fractal rfid tag antenna with. Typical impedance of a rectangular patch antenna varies from 100 to 400 at the resonance the approximate input impedance of a patch is given by 4, 2 1 90. Cst model of the designed antenna showing the users foot, shoe insole and soil, excited by a 50. The microstrip patch antenna is designed so its pattern maxima is normal to the patch. Microstrip moisture sensor based on microstrip patch antenna. Sep 19, 2011 this tutorial shows how to set up a waveguide port of a microstrip patch antenna in cst microwave studio 2010. The fabricated antenna samples include a cpw feed of 2.
Sep 07, 2017 port signal gives you the incident i1 and reflected signal o1,1 on given port 1 with respect to time. Vsimem provides 21 readymade simulation examples for problems such as radiation from an airplane mounted antenna, propagation in a dielectric waveguide, and radar scattering from a metallic object. The design does not need any additional loading or matching network and. Before building antennas, people can use these softwares to. Microstrip patch antennas kai fong lee, kwai man luk. The use of slotted patch reduces the size of antenna and higher bandwidth, which is the area that can be improved with the proposed design. Jun 01, 2015 design and simulation microstrip patch antenna using cst microwave studio 1. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane.
Nominal antenna circuit model parameters are determined from equations 3. Reconfigurable microstrip patch antenna a schematic view of the proposed antenna is plotted in figure 1. Does anyone know when i will have to use waveguide port and. The antenna is designed by using following equation 1to 8.
Abstract a simple compact multiband microstrip patch. Runtransientsolverrun transient solver object xmin xmax ymin ymax zmin. Microstrip patch antenna with coaxial feed using cst mws. What is the importance of port signals in 1d results of cst. Designed and simulated by cst computer simulation technology. Linear arrays of rectangular microstrip patch antennas. A microstrip patch antenna mpa consists of a conducting patch of any planar or nonplanar geometry on one side of a dielectric substrate with a ground plane on other side. Select the application or frequency for which the antenna is to be designed. An attempt is made to design both rectangular and circular graphene patch antennas operating around 5.
Besides a directive radiation pattern, high efficiency and a constant gain is achieved in the operating bandwidth. For wideband patch antenna design on new cst 2017 version, please watch this. What is the difference between a waveguide port excitation and a plane wave excitation in cst. However, the discrete port had more values of sar than the waveguide port but for both. The wave port in ie3d is called extension for waves. How to find impedance at edge of a microstrip patch in cst. Design of a widegainbandwidth metasurface antenna at. Can we defined a magnetic current in cst using discrete port. Microstrip patch antennas were chosen as the array elements because of their inherent robustness, high directional gain and narrow bandwidth. Genetic algorithm optimization for microstrip patch antenna.
This tutorial shows how to set up a waveguide port of a microstrip patch antenna in cst microwave studio 2010. What is the difference between a waveguide port excitation. Analysis of micro strip patch antenna using coaxial feed and. Gain enhancement of rectangular microstrip patch antenna. But illustrates sizes and importance of good antenna design why microstrip antennas.
In general microstrip patch antennas are also known as printed antennas. The frequency range in which the antenna is planed to be be propagating, the size of the antenna, the material, the gain of the antenna and. I think in theory, both must have the same s11 results, but in my simulation i cant get the same results. One other idea i had was just using a discrete port right on the antenna feedpoint, so that i do not have a transmission line to the antenna. Dielectric layer is used for isolating the water in the glass tube from the ground plane. Do i get the same s11 results using discrete port and. Design and analysis of microstrip patch antenna arrays. I want to design a patch antenna b y using cst software but i am facing a. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. Is the discrete port in cst an electric or a magnetic exciter. This paper presents the design of a planar lowprofile, widegainbandwidth metasurface antenna at terahertz frequency.
Introduction to antenna and nearfield simulation in. Antenna simulation models used in my researches and projects. The ultrawide frequency response is achieved by determining the dimensions of the radiating patch of antenna. In this paper, a new approach to achieve dualband operation from single band graphene patch antennas has been presented. Analysis and design of ismband patch antenna array by. The nominal antenna equivalent circuit model was created in ads. Touhami, and tajeddin elhamadi abstractthe miniaturization of the patch antenna has become an important issue in reducing the volume of entire communication system. Cst input impedance of a patch antenna inset fed with microstrip i am trying to design a patch antenna for 20ghz. The aforementioned antenna is designed to operate in the 5. Microstrip patch antenna design santa clara university. Readers of this book may be the case on the basis of refined and improved through the use of this book to design the required antenna and make it optimized.
A new optimization basedmethodology for miniaturizing rfid tag antenna is introduced. Wave guide and discrete port are the two main ports used in cst for the. Genetic algorithm optimization for microstrip patch. Wide band yagi antenna for terahertz application with.
Cst studio suite 3d em simulation and analysis software. Simple dipole antenna to understand the function of the antenna we consider the antenna to be enclosed by a surface volume and radiate in homogenous space free space. I am researching an antenna designed to cover the whole wband 75110 ghz i found in this forum that when we put discrete port with 50 ohm impedance, the resulting z matrix represents the. I use the tool on the toolbar to select the middle points of two edge and then set the port on this two points. Analysis of graphene based miniaturized terahertz patch. Electromagnetic field solvers for applications across the em spectrum are contained within a single user interface in cst studio suite. The cst optimized common element sensor fabricated on an fr4 substrate and energized using a 50ohm sma connector. Design and simulation microstrip patch antenna using cst. Setting up a port for a microstrip transmission line is a bit complicated. This frequency band includes road transport and traf. Microstrip patch antenna are typically used at frequencies between 1ghz to 100ghz. Microstrip patch antennas have become the favorite of antenna designers because of its versatility and advantages of planar profile, ease of fabrication, compatibility with integrated circuit technology, and conformability with a shaped surface.
The yagi antenna is designed on silicon substrate with relative permittivity of 11. Introduction to antenna and nearfield simulation in cst. Implementation of a square patch antenna feeding by a discrete port in cst. Discrete port are similar to plane waves, as they do not require. They are the original type of microstrip antenna described by howell in 1972.
What is the importance of port signals in 1d results of. The patch antenna is based on lowcost, but lossy, fr4 material. To have accurate results, its important that you use a. Analytical formulas given in the textbooks for example balanis do not work that well at such high frequencies. Do i get the same s11 results using discrete port and waveguide.
In this paper, the particle swarm optimization pso technique in conjunction with cst microwave studio electromagnetic simulator are used to design a miniaturized fractal antenna having perfect impedance matching with the tag chip. The width of the microstrip patch antenna is given in equation 1. To energize this antenna, a discrete port is connected. A tripleband microstrip antenna using a 18 annular sector patch with slots and vias is presented in this letter. The rmpa designed using cst software with gain of 2. An antenna radiation pattern is the angular distribution of the power radiated by an antenna. Analysis of micro strip patch antenna using coaxial feed. This video shows how to make a differential port in cst microwave studio. I used waveguide port routinely for microstrip patch antennas, though i was working.
Cst input impedance of a patch antenna inset fed with. The proposed antenna consists of a metasurface and a planar feeding structure, both of which are patterned on an electrically thin, highpermittivity gaas substrate. Proposed antenna has geometrical structure as shown in figure 1. Design yagiuda 16elements in cst hi sandeepkiranv, usually we dont adjust the port dimension to achieve 50ohm line impedance. The proposed antenna consists of a planer radiating metallic patch at upper side of fr4 substrate 0. The proposed dimensions of the microstrip patch antenna is x mm. Port signal gives you the incident i1 and reflected signal o1,1 on given port 1 with respect to time. Read 5 answers by scientists to the question asked by kavita raheja on aug 7, 2017.
Introduction to antenna and nearfield simulation in cst microwave. Conclusion the proposed novel multiband microstrip patch antenna has been successfully implemented using cst computer simulation technology microwave studio software. John herrmann, zach dyals, and angel arcia abstract the objective of this report is to document the design, analysis, fabrication, and measurement of a directional antenna with a 50. Both the designed antennas have very good antenna parameters with the. Need to know about the differences between waveguide port and discrete port. The antenna under test aut was measured using a rhode and schwarz zvb4 vector network analyser vna. Implementation of a square patch antenna feeding by a. Discrete port gave me a dual frequency microstrip antenna between 1 and 3 ghz, but. Microstrip patch antenna with coaxial feed using cst mws part. Uwb antenna on pcb modeling antennas wifi antennas. Uwb antenna on pcb started by admin, february 26, 2017. The proposed antenna is built on a single 18 circle ring sector radiating patch.
Discrete port gave me a dual frequency microstrip antenna between 1 and 3 ghz. The excitation is the same as wave port, but impedance is computed by vi where i is the total current. May 30, 2017 circuit equivalent equations of patch antenna. Dec 03, 2014 microstrip patch antenna with coaxial feed using cst mws part 1. Radius of the ground layer circular cut is 10 mm and the center of this circle is at 25 mm, 33 mm. A novel design of microstrip patch antenna for wlan. Equivalent circuit, aperture coupled patch antenna 2. The performance parameters were achieved with return loss 16. By feeding this antenna with a discrete port having an impedance of 300, simulation results show that this antenna has wm lm wt lt s l w x y g metallization. Click here to go to our page on circular patch antennas new for september 2018.
Monopole antenna, discrete ports, gain, sparameters, bandwidth, vswr. Join the facebook group and discuss your problems with others. Issn 23938021 nternational advanced research journal in. An investigation of sar inside human heart for antenna directivity. As with all other vsim simulation packages, both data analysis and visualization functionality are integrated into vsim for electromagnetics. Hfss from ansoft and cst microwave studio are very popular computer softwares that are used for antenna models design. In the real world, i would calibrate a vna on the actual antenna feed point, or use port extension, but i do not see these options in cst studio.
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