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Technologies (formerly Hewlett Packard) EEsof Advanced Design System (ADS)However, if you wish to learnBefore you can run the software, you will need a few things:See section on environment variables below. You must tell the operating system and the program itself where they canNote that you will haveThe EEsof ADS software that we have runs under the Solaris operating systemUp to 5 students can use it at once by logging in to one of the Linux workstations,Linux box. If you are not familiar with this process, click here Our goal is to draw a simple dipole antenna using the ADS layoutIt can also compute manyAfter a fewThis is the. This browser can be used for navigating through your directories, and throughThe default is 'mil' (0.001 inch), which is. OK for this exercise. (For a chip-scale layout, we'd probably changeSince we will not be drawing a schematic in this exercise, exit the SchematicWe will be creating our antenna by drawing traces on a PC board. In the layout editor, you can draw traces of various widths and lengthsOn this form, enter 10 for the XThis will guarantee that all lines drawnRemember this location. Click the right mouse button (RMB) to bring up the menu and select ZoomOutX2. Repeat this as needed until you can see enough to draw the trace upwardsYou need to turn in a hardcopy of your layout. To do this, use theIt solves Maxwell'sA substrate is a definition of the insulationIn our case, we have only one layer, so we will define the regions aboveThis is cryptic language for findingRecall that we used a Green's function to find the far field of an antennaThe process in MomentumA port is a terminal (or set of two terminals) on the layout at which theWe will take ourHere the program finds the fields computed from the individual mesh elementsOur antenna will be simulated as if it is sitting in mid-air.
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The Green'sEnter Start and Stop frequenciesThe Smith Chart shows S11, theThere are many ways in which the results of an electromagnetic simulationIn this last section, we will take a tour of some of these features ofChart are purely real, which means the antenna is resonant. ReadZ0 is 50 Ohms (not the 377 Ohms of free space). Hence, if x and yIs it what you would expect for anYou may want to zoom in on it. You canThis will allow the pattern to be displayed versus theta as we computedThere is no specific instruction here. Just see what you can do withAlso turn in a discussion of whether. Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime. Report this Document Download Now Save Save ADS Layout Manual For Later 100 (4) 100 found this document useful (4 votes) 2K views 343 pages ADS Layout Manual Uploaded by ravi Description: Starting steps in ADS Full description Save Save ADS Layout Manual For Later 100 100 found this document useful, Mark this document as useful 0 0 found this document not useful, Mark this document as not useful Embed Share Print Download Now Jump to Page You are on page 1 of 343 Search inside document Browse Books Site Directory Site Language: English Change Language English Change Language. A significant difference between MEIT and previous boundary layer codes is its ability to account for the effects of surface roughness. For additional information, please refer to: The lumped design has been converted into microstrip transmission line elements as shown in Figure 2. Transmission lines have been used in place of the inductors and radial stubs have been used in place of the capacitors. Fifty-ohm microstrip transmission lines and tapers have been added to each end of the filter. Simulate this design and compare it with the lumped design. Using the schematic shown in Figure 2 above, delete the 50-ohm Term components and the S-Parameter block.
Add two ports to the schematic as shown in Figure 3. Click OK in the dialog box. The layout shown in Figure 4. will appear. This is useful since you may be able to use the same substrate for different shapes of microstrip circuits, but you will not have to re-compute these preliminary functions. A pop-up window appear asking for the minimum frequency and maximum frequency of substrate computations. Enter a minimum frequency of 0.5 GHz and a maximum frequency of 10 GHz as shown in Figure 10. A status window displaying details of the computation will appear as shown in Figure 11. The important parameter is the mesh frequency which is the highest frequency you want to analyze the circuit for. In our case, 10 GHz will be good. (the higher the frequency, the finer the mesh will be and the longer the simulation time.) Enter 10GHz as the Mesh Frequency and click OK as shown in Figure 14. Enter a Mesh Frequency of 10 GHz and click OK. A status window as shown in Figure 17 will appear. We now have to specify the S-parameter sweep parameters. PLEASE NOTE: DUE TO THE COMPLEXITY OF THIS OPERATION IT IS IMPORTANT THAT YOU CHOOSE “Adaptive” SWEEP AND THAT THE SAMPLE POINTS LIMIT IS SET TO THE MINIMUM THAT IS NECESSARY.Enter a Start of 0.5GHz and Stop of 10GHz. Enter a Sample Points Limit of 30. Then, click “Add to Frequency Plan List” or “Update”. Click the Simulate button to perform a simulation on the layout.This file will automatically be saved to the Data subdirectory of your project as a dataset file (.ds file). The automatically generated plot for S21 is shown in Figure 22. My expertise. High Power, High Conversion Gain Frequency Doublers Using. An Improved Empirical Large-Signal Model for High-Power GaN. An Empirical Large-Signal Model for SiC MESFETs with. Design of a High Power, Wideband Power Amplifier. High Power, High Conversion Gain Frequency Doublers Using. A Wideband Multiharmonic Empirical Large-Signal Model for High-Power.
ADS Momentum Tutorial (ADS2009 and earlier) An Empirical Large-Signal Model for SiC MESFETs with. This is very fast and efficient if the layout can be created from “building blocks” that ADS provides. Variables that control the element size are defined in the schematic’s VAR block. The layout then consists of ADS elements that all have parameters, and reference the schematic VAR block where variable values are defined. Before we move on to scalable EM models, let’s see how that (fixed) emModel is created and used. When an emModel is called from a schematic, ADS will check if EM results are already avaliable for that (or should we say “in that”?) emModel. If data is not yet available, the Momentum simulation will be started and results will be stored into the emModel. As always, we need a schematic symbol to use a cell in the schematic. This symbol can be created from the emSetup dialog toolbar, using the icon that looks like a buffer. If we use the symbol generator defaults, we will get this symbol for our lowpass: If the Momentum simulation was already finished earlier, data is retrieved from the emModel almost instantaneously. Otherwise, the Momentum simulation will be started automatically when the schematic simulation needs the data. We want to use the EM simulation anway (not schematic), so we need to select the emModel view as the active simulation view. At this moment we only have a “static”, fixed EM model without parameters, and you might ask: “What is the benefit compared to normal Momentum simulation?” The answer is: Once we understand this use of emModels for EM-schematic co-simulation, it is easy to add layout parameters. These parameters are then available inside the cell views for schematic and layout. For our testcase, we remove w3 and l3 from the schematic VAR block, and add them as cell parameters. The best way to see that is to place two instances of the cell, with different parameter values, in one layout.
This means our cell parameters work fine now, and teh layout updates properly. For example we can do a simple parameter sweep in schematic: But what about layouts drawn manually, or imported from DXF, GDSII etc. How can we parameterize that for EM. This will be covered in the next chapter. Parameters can be added for EM simulation in a “graphical” way by moving layout edges and declaring the corresponding parameter values. This will be shown below with a simple example. To know our starting values for width and length, we select the middle element and look at the Properties window. We will need these values later. We define the parameter name “length” (which is the size in x direction) and enter the nominal size that we have measured before. For convenience, we will define a modified (“pertubed”) length that is exactly 0.1mm larger, so we enter that value also. To check that everything works as expected, it is a good idea to place the new scalable cell in a layout window and check that it does scale as expected! This is discussed in another appnote: Miniaturized Bandpass Filter (AEL layout example). ADS educational software donation. This provides OSU graduate students with access to the mostAmong other things OSU students will be able to use. ADS within Cadence For a complete list of the new advanced features with linksIn addition our number of seats were upgraded from 10 to 20 Unix floatingADS features several schematic-capture simulators such asPlease share problems and solutions for posting. Thanks.Note that you need to allow S. Akhtar, P. Roblin and J. Strahler,Vol. 50, No. 6, pp. 1561-1570, June 2002.P. Roblin, Invited Paper,Shuang Yu, Master Thesis, May 2000.J. M. Parry, D. A. Bayer, S. B. Bibyk, Proceedings of the 44th IEEE. Many device and component vendors sponsor FREE use of models.
With the trend towards smallerA good understanding of the proper EMSeveral new features and improvements were introduced toThis application note explains the port nomenclature in ADS,The content is organized into three main areas. The firstThe final section contains the recommendedA pin can be defined as aThe blue color denotes a pin in all three cases;For example, a user could define one positive pin and two negativeThis is possible because Momentum supports S-parameter. The ground reference for an S-ParameterWhat all of thisThis occurs with the Modelithics library because the shuntIf Zg1,2 areWhile the most rigorous approach is toPlease note that simulations including finite groundAdditionally, it isTherefore, the edge should be smaller than 10 ofBecause of this, special care is neededFinally, if an areaThese guidelines were not critical for theFor this port calibration type, MomentumA calibrationThis calibration technique reduces the impact of higher order modesFor the “TMLMomentum will automatically use “TMLThe port must be defined differentially across the two edgeMomentum does not de-embed the effects of this metal fromThis way, some parasitic self-impedance is added as a rudimentary wayThis extra bit of metal also models mutual inductive orThe port must be defined differentially across the two edge pins.This effectively adds a little piece ofThe key difference between “DeltaThese ports were previouslyNow, they are simply called “None”.Uncalibrated.
Sometimes uncalibrated ports are the bestWhen enabled, this feature effectively shifts the reference planes fromThe entire pad is removed, including any portionVarious Momentum port types were thenFigure 3 shows the layout that was simulated andFigure 4 shows the co-simulation schematic, which includes theNote that ADS includes “layout lookalike”Note that both configurations giveFigure 8 shows theNote that “SMD”Both of these experiments led to slightly worse results whenUsing a whole-pad area pin as a port forces the entireThis effectively removes the series inductance from theLEGEND: solid linesThese ports must be placed on the edge of the padsNote that the simulation deviates further fromThis is the expected result since “TML (zeroIn addition, “TML (zero length)”The parts usedThe schematic with theFigure 12 shows a zoomed-in view of an area excitation setup in theThe blue color represents a pin.
As mentioned previously, the reasonIn Figure 14, pins 3 and 4 define the port for the capacitor and pins 1The S-parameter calibrationUpon completion of the EM simulation,The schematicThe black circles represent theIt is apparent when looking at theIt is a simulation of a Coilcraft 0805CS inductor onThe results show how the improper treatment of shunt impedance byThere are two different port configuration choicesOne should useBoth single-ended and differential configurations gaveBecause of this, it is preferable to use single-endedHowever, uncalibrated differential port configurationsDifferential port configurations are more convenient inNote that the above recommendations and commentsTherefore, it isEdge ports and small area ports tended to yield similarThis is because whole-pad area ports cause theIn fact, sometimes “SMD”The fact that “SMD” calibration did not improve the match toIf the pads are not simulated in Momentum but insteadHowever, this was not tested forThe pins should typically be placed in theHowever, one should first understand thePoint pins can be used instead of edge or area. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. Before we begin to prepare a vehicle for the forecourt we ensure it will meet our high expectations of an approved used car. It is subjected to a rigorous Multi-Point Check by a team of highly trained technicians. Testing everything from safety and security to engine performance. Only vehicles with a clean history will be considered for the forecourt. All our vehicles come with a promise of any remaining MOT or a new 12-month MOT. All vehicles are sold with the balance of the manufacturer's warranty or a 12 month warranty - whichever is greater. The experience of coping with an oncoming tractor (safely) made up her mind to buy the car!
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A pop-up window appear asking for the minimumfrequency and maximum frequency of substrate computations. Enter a minimum frequency of0.5 GHz and a maximum frequency of 10 GHz as shown in Figure 10. The importantparameter is the mesh frequency which is the highest frequency you want to analyze thecircuit for. Enter a Mesh Frequency of 10GHz and click OK. A status window as shown in Figure 17 will appear. Figure 16. Mesh Preview pop up window Figure 17. We now have tospecify the S-parameter sweep parameters. PLEASE NOTE: DUE TO THECOMPLEXITY OF THIS OPERATION IT IS IMPORTANT THAT YOU CHOOSE“Adaptive” SWEEP AND THAT THE SAMPLE POINTS LIMIT IS SET TO THEMINIMUM THAT IS NECESSARY.Enter a Start of0.5GHz and Stop of 10GHz. Then, click “Add toFrequency Plan List” or “Update”. Figure 20. Simulation Control Dialog Box After the frequency sweep plan has been entered. Click the Simulate button to perform asimulation on the layout.Simulation Results Comparison, S11. These will open up new upgrade branches, allowing you to add new skills for Ellie. They can be found all over the world, and are usually hidden away and pretty hard to find. To make sure you've collected them all we've detailed the locations for every Training Manual, and will go into a bit more detail on the upgrades each one unlocks. We recommend proceeding with care. We've listed them all below, alongside the chapters they can be found in. We'll then go into more detail on each. Seravana Hotel, 1st floor.In the area after 1st encounter with WLF. Opposite gas station.Liquor Store basement. Full of Shamblers.Use the nearby gun bench to trigger an encounter.Abby will complain about a smell, there's a window you can climb into here.The first building you enter.The Training Manual is out in the open The crafting manual allows you to craft reinforced melee weapons, very useful indeed. There's a building opposite, with the Training Manual inside it.
This upgrade branch is extremely useful, allowing you to unlock a faster stealth kill and faster prone movement. Look for this liquor store and make your way into the basement. Kill the shamblers inside, there's a Training Manual as you exit. Make your way through it until you find a gun bench. Use it. After your encounter the locked door in the room you're in will have opened. The Training Manual is in there. The Explosives upgrades allow you to craft more bombs, and increase the damage they do. Head into the building opposite via the open window. There's a dead guy (hence the smell), as well as a Covert Ops upgrade manual. This will unlock improved Listen Mode, as well as other sneaky abilities. Once you get in, open the safe and grab the manual. This unlocks the Momentum upgrade, an essential skill that allows you to chain together powerful melee moves. Once you're out, you'll need to fight a large enemy with a sledgehammer. The first building you enter after this is where the Firearms manual is found. It allows you to craft ammo for the hunting pistol. For a look at how to get the hunting pistol, head over to our Weapons Guide. The code is 90-77-01. Ordinance focuses on pipe bombs and silencer crafting. The silencer upgrade is particularly useful. It speeds up the stealth kill animation, allowing you to be riskier while undetected. It allows you to better plan your attack, and ensures you won't get caught by surprise by any approaching enemies. It's perfect for when you're surrounded by runners, and triggers automatically after a melee kill. There's also our look at the discourse that happened shortly after reviews went live. He spends his days dreaming of an X-Files dating-sim and will play literally any game with monkeys in it. He has an unhealthy obsession with Super Smash Bros. Ultimate, and would pretty much trade a kidney for Skate 4 at this point. They may be meant to oust the scalpers.