Computer-Aided Engineering
 119 results found for Computer-Aided Engineering, displaying items 1 - 20

August 2010
Software Speeds Simulation Of Phased-Array Antenna
BECAUSE OF MAIN-BEAM SCANNING, assessing the performance of a phased-array antenna usually involves the repeated calculation of its far field. Unfortunately, the time-consuming brute-force method comprises the calculation followed by the summation of a large number of complex exponentials, which represent the individual contributions of the array elements to the far field. For an array antenna populated by 1000 array elements, calculating that far field...  — Nancy Friedrich

August 2010
Software Supports Nonlinear Behavioral Modeling
WITH THE RELEASE OF the 2010 Microwave Office (MWO) design suite, engineers are promised new functionality and tools to increase productivity in the design of high-frequency monolithic microwave integrated circuits (MMICs), microwave integrated circuits (MICs), RF printed-circuit boards (PCBs), and modules. The release supports nonlinear behavioral modeling via Agilent’s X-parameters, Mesuro’s Cardiff model, and more. In addition, it delivers improved speed in ...  — Nancy Friedrich

July 2010
EM Simulators Improve With Age
Electromagnetic (EM) simulation has long been an essential modeling tool for RF /microwave design. Before selecting a simulator, however, it helps to understand the differences among EM solvers. On the simplest level, an EM simulator can be as basic as a cross-sectional analysis tool to derive parameters for a transmission line. For more complex structures, EM simulators can be differentiated by programs designed to analyze planar...  — Jack Browne

July 2010
Form Microstrip Couplers With Shielded Membranes
Membrane-supported transmission lines and circuits are excellent candidates for millimeter-wave applications where conventional substrate-supported architectures begin to suffer from parasitic effects at the dielectric/ air interface.1-3 Transmission lines based on the technology, known as shielded-membrane-microstrip (SMM) transmission lines, have been used to realize an asymmetric tapered coupled-line coupler operating from 10 to 60...  — Nasreddine Ben Ahmed , et al.

June 2010
Software Facilitates Filter Synthesis
TARGETING THE SMART-GRID MARKET, a new wireless subsystem can be easily integrated into applications like electric meters, industrial machinery, home appliances, and thermostats. Dubbed the SyNode 3020 (SN3020), this smart-energy embedded wireless module is fully ZigBee compliant. It supports both the Smart Energy and Home Automation profiles. The SN3020 integrates a ZigBee system-on-a-chip (SoC) transceiver, power amplifier (PA), and lownoise ...  — Nancy Friedrich

April 2010
Design MMICs On A Budget
Designing a monolithic microwave integrated circuit (MMIC) implies million-dollar mask sets and expensive computer-aided-engineering (CAE) software. But for those on a budget, is it possible to be fiscally responsible and still create a MMIC? To explore the possibilities, a GaAs low-noise amplifier (LNA) was chosen as an example target design, since it can be created by means of a linear circuit simulator and an S-parameter file, including noise data, as supplied...  — John E. Penn

April 2010
Math/EM Software Solves Circuit Problems
Software simulation has largely taken the place of “trial-and-error” prototypes in fine-tuning high-frequency designs. Two of the types of software tools often used by RF and microwave engineers are mathematical and electromagnetic (EM) field simulators. Although math tools can be applied for analysis in almost all scientific fields, they can also be run with electrical engineering modules. And EM simulators have leveraged the increased computing power...  — Jack Browne

March 2010
Bring Measurement Equipment Into System Simulation
DURING THE SIMULATION of a complete subsystem, the quality of the measurement data is critical to determining whether the finished product will meet or exceed the demands faced by the system when in use. Ideally, that measurement data will allow engineers to save time and money by making changes to the system earlier in the design process. Of course, that capability requires a direct link between the system simulation software and measurement equipment. One...  — Nancy Friedrich

March 2010
LTE Signal-Fading Simulator Profiles Handsets
Rather than having to buy and cable together two separate test instruments, engineers working on fourth-generation (4G) Long Term Evolution (LTE) handsets can now rely on a onebox test system for cell-phone signal fading simulation. This fading simulator option is integrated within the 7100 series digital-radio test set. That signal generator and analyzer covers 70 MHz to 6 GHz continuously with resolution of 1 Hz to 3 GHz and 2 Hz above 3 GHz. To...  — Nancy Friedrich

February 2010
Shooting Bouncing Ray Method Is At Solver’s Roots
DARMSTADT, GERMANY—CST Microwave Studio (CST MWS) now incorporates an asymptotic solver that is based on the Shooting Bouncing Ray method—an extension to physical optics. The integration of CST Microstripes into the CST Studio Suite should facilitate access to features that are particularly valuable in EMC simulations, such as compact models and Octree meshing, within the design environment. The software is capable of tackling simulations covering thousands of...  — Paul Whytock

January 2010
An Interview With Jim McGillivary
NF: Software—especially EDA software—is increasingly playing a bigger role in test and measurement. How do you see that trend growing? JM: There’s currently a disaggregation of the design process as manufacturers focus on being a system integrator and trying to build software ecosystems. For example, handset designers have sockets and they want vendors to compete for those sockets. They need a...  — Nancy Friedrich

January 2010
Upgraded CAE Software Simulates RFIC Designs
Low-cost wireless products rely on the timely design and cost-effective production of radio-frequency integrated circuits (RFICs). To help that cause, Agilent Technologies has released version 4.4 of its GoldenGate RFIC simulation, verification, and analysis software with new capabilities in RF mixed-signal simulation. This latest version of the computer-aided-engineering (CAE) software supports...  — Jack Browne

November 2009
Microwave Software Covers More Of The Design Flow
High-frequency designs once were created with the help of many different computer-aided-design (CAD) tools—many lacking interfaces between them. Over the past decade, however, it has become possible for a microwave designer to step through design, layout, fabrication, and more as part of a continuous design flow. If that flow lacks any specialty, such as three-dimensional (3D) electromagnetic (EM) simulation, it generally will offer an easy interface ...  — Nancy Friedrich

November 2009
Simulating RF Tuned Stages
Assessing post-production- tuning (PPT) elements should be part of any RF worstcase circuit analysis (WCCA). Unfortunately, PPT elements are often omitted or incorrectly incorporated into an analysis, even though including such tuning elements into a computer-aidedengineering (CAE) model is often a simple task. Correctly accounting for PPT elements depends on the ability to define the PPT procedure and to mathematically define the relationships ...  — Steven M. Sandler

November 2009
Analyze BER Performance Of Wireless FSK Systems
Modern communication systems employ digital modulation for a variety of reasons, including improved immunity to noise and channel impairments as well as enhanced security compared to analog modulation. In addition, advances in very large-scale integration (VLSI) and digital signal processing (DSP) technology have made digital modulation more cost effective than analog transmission systems. Digital transmissions accommodate digital error-control...  — Hamood Shehab Hamid , et al.

October 2009
Analyzing WiMAX Modulation Quality
Advanced wireless communications standards rely on complex modulation schemes to achieve high bandwidth efficiency. WiMAX, for example, employs the orthogonal frequency division multiplexing (OFDM) technique.1 Due to many challenges with such complex modulation formats, sophisticated simulation and verification tools and approaches are required to achieve optimum system-level performance. For example, the transmit modulation accuracy depends...  — Bill Wu

October 2009
New EDA Software Versions Boast Broad Enhancements
Electronic-design-automation (EDA) software tools have become the voltmeter and the slide rule to the modern high-frequency engineer. But unlike those two hardware tools, software can be updated for improved performance, as is the case in recent releases from Applied Wave Research [AWR] for Version 2009 of the firm’s widely used Microwave Office design environment and Version 2009 of the Visual System Simulator (VSS) software tools. Both new software versions ...  — Jack Browne

October 2009
Software Uses High-Performance Computing To Tackle EM Problems
IN ITS NEWEST iteration, an engineering simulation software vows to help engineers solve complex electromagnetic (EM) field problems quickly, accurately, and efficiently. HFSS 12.0 includes domain decomposition, a highperformance- computing (HPC) enhancement that allows engineers to address problems containing hundreds of millions of unknowns. This new technology allows efficient and highly scalable parallelized simulations across multiple...  — Nancy Friedrich

May 2009
Passive Simulation Models Gain Accuracy and Scalability
 — Ashok Bindra

July 2009
Technology Integration Simplifies PCB/Cable-Harness Simulation
 — The Editors of Microwaves & RF





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