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3d Em Simulation Of Mixed Analog
This article describes the use of CST MICROWAVE STUDIO® (CST MWS) to solve a coupling problem in a mixed analog – digital multilayer PCB card. The work was carried out by Mr. Zeev Iluz, Alvarion, Ltd.
The PCB is made of 14 layers and contains several A/D convertors, which operate at f=20MHz. Each A/D has 12 digital outputs and the traces to the FPGA are routed in two different layers. After manufacturing and testing the first prototype by transmitting the periodic digital pulses from the first A/D, a high signal in the second A/D analog port was detected [Figure 1], which shows a strong coupling from the first A/D (output traces) to the second A/D (input trace).
The second A/D analog trace is in the top layer while the first A/D digital traces are in internal layers. All layers are separated by a metal ground and an isolation higher then 80dB is expected. However, in figure 1 it can be seen that the isolation between the traces is about 80dB(left)-40dB(right)=40dB. This is a very high value that indicates there is a poor isolation despite the presence of the metal ground.
Coupling To The Second A/D Input
All 12 ports from the A/D input traces were simulated. The S-Parameters in figure 4 which shows that the traces 6,10,11 and 12 have a high coupling to the A/D output compared to all other traces, whereas trace 11 has 40dB more coupling than the other traces. From these S-Parameter results we are now able to locate the trace 11, which has a strong coupling to the A/D output (port 26).
Cst Mws 14 Layer Pcb Model
All the 12 traces from the A/D (input) were terminated with 50 ohm ports at both ends. In order to read the coupling to the second A/D output, this was terminated with a 50 ohm port as well (port 26).
Dams Heavy Duty Antenna Measurement System
First A/D Output
The layers thickness and R, L, C components were defined. Gap source ports between the outputs of the first A/D to the FPGA and the second A/D input were easily defined in CST ODB++ import software. Since only the A/D connection are the point of interest, only the relevant area of the board was imported [Figure 3].
The great variety of devices in need of electromagnetic simulation has led, over the years, to the development of an almost as great variety of solutions. For each device, there is probably one method that provides the quickest, most accurate results. The goal of this paper is to discuss applications for which time domain simulations are not only well suited, but perhaps even the only successfully applicable approach.
Wave Wizard Speed Examples Combline Filter Software
Eight resonator folded combline filter calculated with 200 frequency steps:
Wave Wizard Speed Examples Diplexer T-Junction Software
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Wave Wizard Speed Examples Waffle Iron Filter Software
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Bandpass Coupline Matrix Synthesis Software
As an example the synthesis of the coupling matrix of a 12-th order filter is shown. be found. The return loss level is -30dB, the frequency band 10.8GHz-11GHz, two imaginary zeros at 11.02GHz and 11.05GHz and one pair of complex zeros to equalize the group delay response.
Bandstop Coupling Matrix Synthesis Software
As an example the synthesis of the coupling matrix of a 8-th order filer is shown. TThe return loss level is -40dB, the frequency band 2.4GHz-2.48GHz, two imaginary zeros at 2.39GHz and 2.38GHz. T
Cst Design Environment
CST DESIGN ENVIRONMENT™ is the access point to CST STUDIO SUITE™ . In this frame work projects created with the different electromagnetic simulation softwares in CST STUDIO SUITE™ can be opened simultaneously.
Cst Design Environment User Interface
The CST DESIGN ENVIRONMENT™(CST DE) user interface is the common pre-processor for all members of the CST STUDIO SUITE™. The 3D tools CST MICROWAVE STUDIO®(CST MWS), CST EM STUDIO®(CST EMS) and CST PARTICLE STUDIO®(CST PS) rely on the same technology that previously founded CST MWS reputation for offering the user friendliest interface on the market:
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SATSOFT is used for communication satellite antenna design, analysis, and coverage planning. Quickly assess antenna coverage and gain, conduct antenna trade studies, develop shaped beam and multibeam antenna designs, and perform other satellite payload engineering tasks. SATSOFT was written for the systems engineer as well as the antenna specialist. Its graphical user interface was designed to enable users with even a basic knowledge of antennas to use the software productively. Advanced tools will appeal to the antenna specialist. If you need software to model satellite antennas, for GEO, LEO or MEO constellations, SATSOFT was written for you. Please see our Products page for more information on SATSOFT and the options that are currently available.
Wave Wizard Software
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Mician’s software developers' secret for speed is to avoid the use of time consuming 3D solvers wherever possible and to focus on applying the Mode-Matching Technique and its derivatives instead, even on structures that at first glance seem to be suited for 3D solvers only. Yet, a 3D FEM solver on element level is available within the µWave Wizard for structures with very complex geometries or with features not feasible to be implemented in MM.
In addition to its fast and powerful numerical methods, the µWave Wizard offers an appealing and ergonomic GUI that enables flexibility and openness. The consequent implementation of the latest field theoretical and mathema typical approaches is Mician's challenge for the continuous enhancements of the µWave Wizard.
Wave Wizard Speed Examples Diplexer Software
Waveguide diplexer calculated with 300 frequency steps:
Wave Wizard Speed Examples Horn Antenna Software
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Wicomm Tools Combline Synthesis General Software
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Wicomm Tools Synthesis And Optimization Software
After starting CFSW the main window appears as shown in Fig.2. The window allows the setup of the filter specifications. The design of the filter is straight forward. From the users side it is required to go through all tabs and to add the required parameters to the entries until all check marks are green.
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Consultancy Turnkey Projects Antennem Communication
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CST CABLE STUDIO™ (CST CS) is dedicated to the three-dimensional analysis of signal integrity (SI), conducted emission (CE), radiated emission (RE), and electromagnetic susceptibility (EMS) of complex cable structures in electrically large systems. It provides powerful import filters from popular MCAD and ECAD tools for smooth integration into the industrial workflow.
With its main focus on automotive and aerospace applications, CST CS is equipped with enhanced visualization capabilities in order to interactively highlight selected signals or cables in both the 3D graphic view and the 2D schematic view. Visual positioning checks of connectors and cables are easily possible. Information about which cable carries which signal or which wires are connected to which connector pins can be directly accessed in the CST CS navigation tree.
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Cst Pcb Studio
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Wave Wizard Focus Software
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