Fundamental principles, concepts, and use slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. To access online help from the hfss user interface, do one of the following. How assign lumped port in hfss for stripline sipi exchange. Cpw structures has been carried out with the hfss software. If you continue browsing the site, you agree to the use of cookies on this website. Lumped gap source ports 3 a port with multiple conductors per port would take all coupling into. The demand for a smaller 90degree hybrid coupler with a broader bandwidth is. Hfss waveport simulation for cpw transmission line z0.
Chandrasekhar, please send me that powerpoint file. Intuitive pcb design entry for hfss chips, packages, channels, modules, designer layouts simulated with hfss automated boundary and port setups finite dielectrics and ground supported wave and lumped gap port single ended and differential vertical and horizontal. Roke presentation title 2 using hfss successfully at 77ghz data sheets give you the dielectric constant and the loss tangent. Rs microwave 12 ports in em simulators in 3d em solver wave port internal port formed by a rectangle between trace and ground known as lumped port or gap port courtesy. The boundary selection of the coaxial lumped port in a 2d axisymmetric model. The port and lumped port boundary conditions can help simplify the modeling of wave electromagnetics problems. Lumped port reduced height lumped port narrow l can be reduced by moving the ground plane up towards the track, shortening the port. Hfss waveport simulation for cpw transmission line z0 mismatch so i cant quite figure out what seems to be the problem. Adam nykoruk mccaughan submitted to the department of electrical engineering and computer science on may 21, 2010 in partial ful llment of the requirements for the degree of master of engineering in electrical engineering and computer science abstract over the last decade, quantum information experiments with trapped ions have demon. It shows the electric and magnetic vector fields at 10ghz as well as. In some practical radiation system, where the semiconductor device has a cpw output terminal, a cpw fed antennasmith and williams 1992abed2008 is usually required to form a smooth integration with the device. Mar 09, 2015 an example of a userdefined lumped port geometry.
Students registered in ece451 can get free access to ansys hf package from the university of illinois software webstore. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. You should now be able to plot the sparameters for both the port driving the cpw and the new waveport connected to the antenna. Lumped excitation of cpw fed slot bowtie antenna by hfss. Set up and run a sonnet em simulation project of a coplanar waveguide cpw transmission line including the port designations for differential signaling. I want to know if the lumped port height and width effects the impedance of the structure. Silist how assign lumped port in hfss for stripline. Ultrawideband gcpwmsgcpw driven electrode for low cost and. To obtain the field patterns, intrinsic impedance and wavelength for the first 4 modes.
To open a help topic about a specific hfss dialog box, open the dialog box, and then press f1. Mar 09, 2015 the port and lumped port boundary conditions can help simplify the modeling of wave electromagnetics problems. 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. Analysis must include first three modes te10, te20, te01 3. Learn how to use the port and lumped port boundary conditions in comsol multiphysics for modeling wave electromagnetics problems. Ansoft hfss 3d boundary manager go back contents index sources port wave ports lumped gap sources considerations when defining ports incident wave voltage and current sources magnetic bias port by default, the interface between all 3d objects and the background is a perfect e boundary through which no energy may enter or exit. Walter frei explains what these boundary conditions mean and when they should be used. Yes, you will want to define a port at each end of the conductor the ports will be defined between conductor and ground. Rectangular waveguide hfss r objective getting started with hfss a tutorial using hfss, simulate an airfilled wr90 waveguide shown above. I konw for a microstrip line, i can draw the 2d port rectangle that touchs the signal with one edge and the opposite edge touch the reference ground plane. I have a cpw transmission line that i am tweaking the dimensions of to try and get 50 ohm characteristic impedance. The software also includes postp rocessing commands for anal yzing the electromagnetic behavior of a structure in more detail. Filter design using ansoft hfss university of waterloo. Hi, 1,draw one rectangle which contact to the edge of the top and bottom plane 2,draw one rectangle which has the.
I want to define a lumped port in hfss driven terminal solution type to model a voltage source with an internal resistance of 5 kohms. Bi, i have done extensive simulation on hfss, both ansoft and agilent, and the cpw problem has always frustrated me, but found that i could generally coax the simulator into doing. If your solution type is driventerminal, you may use edit sources to terminate one of the ports with a matched resistance value you will need to toggle terminal excitation type to total voltage in the edit sources window first. To determine if the results are as expected, you compare hfsss sparameter calculations at each septum position on a.
The device must be connected by a section of transmission line or waveguide supporting traveling waves. Basic electromagnetic field quantities and, for open boundary problems, radiated near and far fields. The lumped port can be used to specify an effective impedance between two conductive boundaries within the modeling domain. Bi, i have done extensive simulation on hfss, both ansoft and agilent, and the cpw problem has always frustrated me, but found that i could generally coax the. Copper lumped port excitation create a lumped port and excite it. Pdf high frequency structure simulator hfss tutorial. How to set lumped port and wave port in hfss youtube. Materials used in pcb technology generally have dk from 2 to 10 dk is dimensionless. A lumped port excitation will be used for the cpw feed. To determine if the results are as expected, you compare hfsss sparameter calculations at each septum position on a 2d xy plot.
Does anyone have an idea about the wave port or lumped port in hfss,which. How can i connect the waveguide port for cpw coplanar feed line for a patch antenna using cst software. How ii should not include the lumped ports impedance in the total result. However, modaltonodal software is needed to make use of this. To address the excitation and termination of a coplanar waveguide cpw or the common or differential mode on two parallel microstrip lines, use the multielement uniform type coplanar waveguides. Rs microwave box resonance resonance due to the enclosure appears as spurious. Ports and lumped ports for wave electromagnetics problems. Feb, 2003 the port need to be large enough to reduce edgeeffect. Characteristic port impedances and propagation constants.
International journal of engineering trends and technology. To plot the radiation pattern of slot antenna using hfss. Use waveport, not lumped portif excitation is external for gud results. Aug 07, 2017 this is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss. Follow the installation guide to install the software on your pc. I am using lumped port to measure the impedance of a rod buried in soil in high frequneices. This is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss. Simulation of cpw in hfss circuit design electrical.
The imaginary component of complex permittivity is df dissipation factor. How do you design a port in hfss for cpw feed slot antennas. Click the microsoft start button, select programs, and select the ansoft, hfss 10. The device must be connected by a section of transmission line or waveguide supporting. This port configures the cpw model with a pair of subfeatures called. Intuitive pcb design entry for hfss chips, packages, channels, modules, designer layouts simulated with hfss automated boundary and port setups finite dielectrics and ground supported wave and lumped gap port single ended and differential vertical and horizontal coaxial, cpw and grounded cpw. Dk is a very important property for microwave pcb design. Specifically, the 90 degree hybrid coupler is utilized in the handset infrastructure because it offers lowloss, high isolation, and exceptional phase and amplitude balance. Your guide to lumped ports in the rf module comsol blog.
Coplanar waveguide port size is determined by inner dimensions of waveguide. For transmission line problems, such as microstrip lines or cpw, in theory, the size of the. Waveports also feature deembedding to postprocess sparameters to remove effects due to artificial tls used to create connections or adding the effects of the length of tl lines not physically modeled. Gap source port has other boundary conditions on sides that dont touch metal. Wave port represents the surface through which a signal enters or exits the geometry. A 50ohm acp probe is going to transfer high frequency modulation up to 30ghz to a coplanar waveguide cpw which is connected to a short cavity laser with a bondwire of 25um diameter. The ansoft high frequency structure simulator hfss is a fullwave electromagnetic em software package for calculating the electromagnetic behavior of a 3d structure. A lumped port can be defined on any 2d object that has edges. Hfss assumes that each wave port you define is connected to a semiinfinitely long waveguide that has the same crosssection and material properties as the port. Left and right edges of port should touch left and right ground planes of cpw. The length of the line must be long enough such that only one propagation mode exists on the reference plane of the port.
How assign lumped port in hfss for stripline hi,everybodybecause the pcb line i will simulate located internally, so i can not use the wave port of hfss. Ansys hfss is an industry standard tool for simulating 3d fullwave electromagnetic fields. Basic electromagnetic field quantities and, for open. Another use of the lumped port condition is to model a small electrical element such as a resistor, capacitor, or inductor bonded onto a microwave circuit. Lumped port inductance in hfss ansys student community. So, i am defining a sheet which is assigned as the lumped port, and then after a short distance which is modeled by a cylinder, i define another sheet to assign 5 kohms to it as the interal impedance of. Lumped gap source ports 4 example of structure where gap source ports can be useful. Lumped ports are used to excite or terminate passive circuits and. I read in hfss help that lumped port has some inductance in range of nh. To address the excitation and termination of a coplanar waveguide cpw or the common or differential mode on two parallel microstrip lines, use the multielement uniform type.
742 416 1342 708 1419 1052 180 138 1045 1284 1194 185 1455 418 1072 720 41 1151 223 1305 1530 1599 202 12 241 472 349 1566 1071 819 845 1413 515 789 875 974 1250 209 1323 567