Modeling approximation can be used to design the microstrip trace. Ansys hfss tutorial simulate and analyze an example of microstrip line drew handler, jerry yang october 20, 2014. Hfss is a highperformance fullwave electromagnetic em field simulator for arbitrary 3d volumetric passive device modeling. Generalized sparameters are computed by matching the fields on.
Overall length of the testboards is 50 mm which gives a distance between open ends of 30, 20 mm. A simple microstrip transmission line is design here. Design and analysis of micro strip antenna using hfss software. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. The rectangular micro strip patch antenna is analyzed using high frequency structure simulator hfss v 11.
Any system level schematic symbol should rely on no assumptions in the readers mind, and should always show an arrow or words depicting coupling direction. The structure of the coupler is planar and construction is simpler and can be used for rfid applications. Sumathi department of electronics and communication engineering, nandha engineering college, erode, tamilnadu, india. The design, fabrication and measurement of microstrip. There are some advantages to using a microstrip transmission line over other alternatives. The important thing is that a 9 db edge coupler on microstrip is easy to realize because the even mode impedance is 72.
The following workshop provide a comprehensive understanding of. Podell, a high directivity microstrip coupler technique, in ieee. This video tutorial shows how to design a microstrip patch antenna in hfss software. Eshape microstrip patch antenna design for wireless.
Several configurations are analyzed using the hfss simulation software and a 2. I am having trouble with port assignment whether to use lumped or waveport, which solution. By using the j inverters obtained above, the even and odd type characteristic impedance of the coupled micristrip line resonators is. This paper reports for magic tee that a signal incident on the difference port splits equally between ports. The coupler used a designrulebased transformation, starting from an existing steppedline coupler design. How to find substrate length and width in designing a. Conversely, microstrip or stripline coupled lines coupled output port is closest to the input port. Hfss is an interactive simulation system whose basic mesh element is a. Both can be realized in microstrip, stripline or even coax, but stripline is the goto technology for coupledline couplers. The 2x1 rectangular microstrip patch antenna array is designed using hfss by placing same microstrip antenna in linear configuration. An alternative use of the coupler could be to design an rfloop channel from.
The modal complex propagation constants and characteristic impedances are computed. A microstrip antenna consists of conducting patch on a ground plane separated by dielectric substrate. Then, an optimization procedure was performed using the commercial software ansys hfss in order to compensate for losses and second order. Its goldstandard accuracy, advanced solver and compute technology have made it an essential tool for engineers designing highfrequency and highspeed electronics components. We have different types of substrates such as rogers, fr4 epoxy etc. Linear arrays of rectangular microstrip patch antennas. Basic electromagnetic field quantities and, for open.
Filter design using ansoft hfss university of waterloo. Substrateintegrated waveguidetomicrostrip couplers for. The microstrip is a very simple yet useful way to create a transmission line with a pcb. Choose the coupler planar, microstrip, cpw template. Microstrip line design in hfss part1 use captions. Performance comparison between hfss and cst at the example of a 1db siwtomicrostrip coupler with 8 single apertures c. Introduction the concept of micro strip antennas was first demonstrate in 1886 by heinrich hertz and its practical application by guglielmo marconi in 1901 and it can be newly proposed by decamps in 1953. Ansoft hfss software is the industry standard for simulating 3d full wave electromagnetic fields. Theory of coupled line couplers for two transmission lines coupled together to form a fourport network, there are two things that have to occur with coupled lines to become a usable coupler with directivity and. Fang microstrip antenna design handbook garg et al title says it all, but a few inaccuracies have been found antenna theory constantine balanis used for antennas i elen 715. Institute of antenna and microwave techniques, school of electronics engineering, tianjin university of technology and education, dagu south road 10, liulin dong, hexi district, tianjin 300222, p. The designed rmp antenna array structure is shown in fig. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
A design of microstrip directional coupler for high. For a 20 db single section edge coupled line directional coupler, con structed as a stripline with ground plane, spacing of b 3. Microstrip patch antenna design santa clara university. There is a tradeoff between cost versus performance in cho. Next, we are going to create the other parts of the coupler. Rectangular microstrip patch antenna for wireless communications at 6. Measurement and simulation of coaxial to microstrip. The figure 3, 4 and 5 indicate the assign boundaries of perf e1, perf e2 and radiation.
Im not very experienced in this field of engineering but id really appreciate it if you could help me to figure out what i maybe doing work. I am designing an ultrawideband slot coupled directional coupler. The microstrip line is a transmissionline geometry with a single conductor trace on one side of a dielectric substrate and a single ground plane on the opposite side. Waveguide couplers coupled output port is farthest away from the input port. Several microwave microstrip bandpass filters were designed with surface area. Furthermore, the mesh settings are changed to account for the planar. Submillimeterwave 10 db directional coupler based on. Design of coaxfed eshaped microstrip patch antenna with triple bands muhammad salim garba. This concept was undeveloped until the revolution in electronic circuit miniaturization and. Design of coaxfed eshaped microstrip patch antenna with.
Patch antenna design using hfss ozen engineering and ansys. However once i get the simulation working the results arent exactly what i expect. Microstrip patch antenna using hfss linkedin slideshare. Proposed rectangular microstrip patch antenna using hfss software v. The values of all lumped elements were optimized to replace a quarterwavelength transmission line with a phase. Rectaangular microstrip patch antenna for wireless. It employs the finite element method fem, adaptive meshing, and brilliant graphics. Pisano2 1dipartimento di ingegneria elettrica ed elettronica diee, univer sity of cagliari, italy.
By introducing lumped element based compensation networks at the isolated and coupled port of a simple electrically short directional coupler, a very high directivity and a constant coupling over enormous bandwidths up to one decade can be achieved. A twodimensional eigenvalue problem is solved first to find the waveguide modes of this port. Patch antenna design using hfss this workshop is intended to show how to simulate and analyze a microstrip patch antenna using ansys hfss. First, you need to choose the frequency of operation that the antenna finds the application and the type of substrate. Been working on designing a simple single section directional coupler and simulating it in hfss. Impedance bandwidth and gain improvement for microstrip.
The design procedure doesnt require prior knowledge of physical geometry of the coupler but requires only the information of the port impedences, coupling and optional frequency. A design of microstrip directional coupler for high directivity and tight coupling chulsoo kim, youngtae kim, seunghoon song, wansoo jung, kwangyong kang junseok park, and dal ahn div. The figure 2 represents the microstrip patch antenna design. Analysis and design of rectangular microstrip patch. Index terms eshape microstrip patch antenna, hfss high frequency structure simulator version software, wideband. Citeseerx document details isaac councill, lee giles, pradeep teregowda.
Broad bandwidth, hfss, microwave filter, parallel couple line. The power divider technique for feeding is used in 2x1 antenna array. The ansoft high frequency structure simulator hfss is a fullwave electromagnetic em software package for calculating the electromagnetic behavior of a 3d structure. Aim the aim of the thesis is to design and fabricate an insetfed rectangular microstrip patch antenna and study the effect of antenna dimensions length l, width w and substrate parameters relative dielectric constant. The software used to model and simulate the microstrip patch antenna is hfss. How to define ports of directional coupler in hfss. Using this technique the power goes to equal in every antenna element. Since it is an open structure, microstrip line has a major fabrication advantage over stripline. Simulation results and some graphics are also included. China 2 department of physics and electronic science, chuxiong normal university, chuxiong, 675000.
Design of a 3 db branch line coupler in hfss duration. Introduction the name hfss stands for high frequency structure simulator. A waveguide 10 db directional coupler operating from 325 ghz to 400 ghz is. Simulated results in hfss when we completed the design part of the proposed antenna we got the simulated results of the antenna which includes return loss s11 parameter, vswr, 2d radiation pattern as well as 3d radiation pattern. Novel broadband 3db directional coupler design method. Introduction ansys hfss is an industry standard tool for simulating 3d fullwave electromagnetic fields. Ansys hfss is the industry leading 3d electromagnetic em simulation tool for high frequency and high speed electronic components including antenna design and placement.
Microstrip to waveguide transition with integrated coupler diva. Analysis and design of rectangular microstrip patch antenna using hfss p. By understanding the microstrip transmission line, designers can properly build these structures to meet their needs. Design of a lowcost microstrip directional coupler with. Emcemi shield enclosures, coupling, near or farfield radiation. The simulation results are verified with measurements. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for microstrip patch antenna in uwb range i. Microstrip patch antenna design and simulation vengalam mahendra reg no. The unique property of this design method is that it unnecessitates both a feedback from the.
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