Filter design using ansoft hfss university of waterloo. Analysis and design of rectangular microstrip patch. Linear arrays of rectangular microstrip patch antennas. The figure 2 represents the microstrip patch antenna design. With similar structure of conversional 2section branchline coupler, the proposed coupler consists of a lumped highpass network but not the quarter wavelength transmission at the center. The rectangular micro strip patch antenna is analyzed using high frequency structure simulator hfss v 11. Proposed rectangular microstrip patch antenna using hfss software v. Emcemi shield enclosures, coupling, near or farfield radiation. The coupler used a designrulebased transformation, starting from an existing steppedline coupler design. Novel broadband 3db directional coupler design method. Microstrip patch antenna design santa clara university. Eshape microstrip patch antenna design for wireless. Podell, a high directivity microstrip coupler technique, in ieee. A waveguide 10 db directional coupler operating from 325 ghz to 400 ghz is.
Overall length of the testboards is 50 mm which gives a distance between open ends of 30, 20 mm. Design of a 3 db branch line coupler in hfss duration. How to find substrate length and width in designing a. Patch antenna design using hfss this workshop is intended to show how to simulate and analyze a microstrip patch antenna using ansys hfss.
Modeling approximation can be used to design the microstrip trace. By understanding the microstrip transmission line, designers can properly build these structures to meet their needs. The 2x1 rectangular microstrip patch antenna array is designed using hfss by placing same microstrip antenna in linear configuration. The ansoft high frequency structure simulator hfss is a fullwave electromagnetic em software package for calculating the electromagnetic behavior of a 3d structure. 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. There are some advantages to using a microstrip transmission line over other alternatives. 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 microstrip is a very simple yet useful way to create a transmission line with a pcb. A design of microstrip directional coupler for high. This paper reports for magic tee that a signal incident on the difference port splits equally between ports.
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 parameters evaluated were gain, beamwidth and return loss. Performance comparison between hfss and cst at the example of a 1db siwtomicrostrip coupler with 8 single apertures c. Return loss and isolation are better than 15 db for most of. 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 modal complex propagation constants and characteristic impedances are computed. Introduction the name hfss stands for high frequency structure simulator. Then, an optimization procedure was performed using the commercial software ansys hfss in order to compensate for losses and second order. Hfss is an interactive simulation system whose basic mesh element is a.
The following workshop provide a comprehensive understanding of. The unique property of this design method is that it unnecessitates both a feedback from the. 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. Microstrip patch antenna using hfss linkedin slideshare. 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. We have different types of substrates such as rogers, fr4 epoxy etc. First, you need to choose the frequency of operation that the antenna finds the application and the type of substrate. China 2 department of physics and electronic science, chuxiong normal university, chuxiong, 675000. 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. 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 hairpin filter was designed and simulated using agilent ads 1. Choose the coupler planar, microstrip, cpw template. Index terms eshape microstrip patch antenna, hfss high frequency structure simulator version software, wideband.
Patch antenna design using hfss ozen engineering and ansys. The power divider technique for feeding is used in 2x1 antenna array. The important thing is that a 9 db edge coupler on microstrip is easy to realize because the even mode impedance is 72. Design and simulation of magic tee and ring hybrid coupler.
Several configurations are analyzed using the hfss simulation software and a 2. A twodimensional eigenvalue problem is solved first to find the waveguide modes of this port. Furthermore, the mesh settings are changed to account for the planar. Generalized sparameters are computed by matching the fields on. I am designing an ultrawideband slot coupled directional coupler. Both can be realized in microstrip, stripline or even coax, but stripline is the goto technology for coupledline couplers. Microstrip patch antenna design and simulation vengalam mahendra reg no. This video tutorial shows how to design a microstrip patch antenna in hfss software. Ansoft hfss software is the industry standard for simulating 3d full wave electromagnetic fields. Microstrip to waveguide transition with integrated coupler diva. By using the j inverters obtained above, the even and odd type characteristic impedance of the coupled micristrip line resonators is. Analysis and design of rectangular microstrip patch antenna using hfss p. A simple microstrip transmission line is design here.
Microstrip line design in hfss part1 use captions. Using this technique the power goes to equal in every antenna element. Rectaangular microstrip patch antenna for wireless. The design, fabrication and measurement of microstrip. Simulation results and some graphics are also included. 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. However once i get the simulation working the results arent exactly what i expect. Design and analysis of micro strip antenna using hfss software. The values of all lumped elements were optimized to replace a quarterwavelength transmission line with a phase. Its goldstandard accuracy, advanced solver and compute technology have made it an essential tool for engineers designing highfrequency and highspeed electronics components.
Next, we are going to create the other parts of the coupler. Since it is an open structure, microstrip line has a major fabrication advantage over stripline. An alternative use of the coupler could be to design an rfloop channel from. 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. Substrateintegrated waveguidetomicrostrip couplers for. Several microwave microstrip bandpass filters were designed with surface area. Ansys hfss is the industry leading 3d electromagnetic em simulation tool for high frequency and high speed electronic components including antenna design and placement. Sumathi department of electronics and communication engineering, nandha engineering college, erode, tamilnadu, india. 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. There is a tradeoff between cost versus performance in cho. Hfss is a highperformance fullwave electromagnetic em field simulator for arbitrary 3d volumetric passive device modeling. The simulation results are verified with measurements.
Introduction ansys hfss is an industry standard tool for simulating 3d fullwave electromagnetic fields. The software used to model and simulate the microstrip patch antenna is hfss. Rectangular microstrip patch antenna for wireless communications at 6. Waveguide couplers coupled output port is farthest away from the input port. Submillimeterwave 10 db directional coupler based on. Design of coaxfed eshaped microstrip patch antenna with triple bands muhammad salim garba. A microstrip antenna consists of conducting patch on a ground plane separated by dielectric substrate. 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. Conversely, microstrip or stripline coupled lines coupled output port is closest to the input port. Design of a lowcost microstrip directional coupler with. How to define ports of directional coupler in hfss.
The figure 3, 4 and 5 indicate the assign boundaries of perf e1, perf e2 and radiation. I am having trouble with port assignment whether to use lumped or waveport, which solution. Design of coaxfed eshaped microstrip patch antenna with. It employs the finite element method fem, adaptive meshing, and brilliant graphics. Ansys hfss tutorial simulate and analyze an example of microstrip line drew handler, jerry yang october 20, 2014. The designed rmp antenna array structure is shown in fig. Broad bandwidth, hfss, microwave filter, parallel couple line. Citeseerx document details isaac councill, lee giles, pradeep teregowda. This concept was undeveloped until the revolution in electronic circuit miniaturization and. For a 20 db single section edge coupled line directional coupler, con structed as a stripline with ground plane, spacing of b 3. The structure of the coupler is planar and construction is simpler and can be used for rfid applications. Measurement and simulation of coaxial to microstrip. Been working on designing a simple single section directional coupler and simulating it in hfss. 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.
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