Herzlich Willkommen beim beam-Verlag in Marburg, dem Fachverlag für anspruchsvolle Elektronik-Literatur.


Wir freuen uns, Sie auf unserem ePaper-Kiosk begrüßen zu können.

Aufrufe
vor 9 Jahren

6-2014

  • Text
  • Software
  • Bild
  • Baluns
  • Bandbreite
  • Wireless
  • Instruments
  • Frequency
  • Lvpecl
  • Frequenzen
  • Usrp
  • Mikrowellentechnik
HF-Praxis 6/2014

RF & Wireless Software

RF & Wireless Software CST STUDIO SUITE Version 2014 Released Computer Simulation Technology (CST) announces the release of the 2014 version of the electromagnetic simulation tool, CST STUDIO SUITE®. The latest edition has been developed to improve the performance of the solvers and increase the capabilities for hybrid simulation without compromising on usability. CST STUDIO SUITE comprises a range of electromagnetic simulation tools for high frequency, low frequency, charged particle and multiphysics applications, which are all available within a single graphical user interface. The tool is used by engineers and researchers around the world to design, simulate and optimize EM systems. Improving meshing was a major focus during the development of CST STUDIO SUITE 2014, in order to make the mesh engines more efficient, more robust and more userfriendly. Both the hexahedral and tetrahedral mesh have been improved to reduce the cell count and help to discretize complex or lowquality CAD data. The simulation of complex systems has also been improved. Field source coupling and multiphysics simulations can be set up automatically using the new System Assembly and Modeling (SAM) wizards. SAM allows different solvers to be combined in a single simulation project and can be used to model complex systems one component at a time. CST STUDIO SUITE fits into a wide range of CAD and EDA workflows through its import and export tools. These have been upgraded to support more file types and offer greater control of model quality. In addition, the 2014 release introduces version control. Imported CAD files can now be monitored by the software, with changes to the external data automatically reflected in the simulation model. Alongside these major changes, numerous smaller improvements have been made to both the front-end and back-end of the software in order to make modeling, simulation and results processing faster and more straightforward. Shipping of CST STUDIO SUITE 2014 to existing users is expected to be completed by mid-April 2014. Highlights of CST STUDIO SUITE 2014 General • Improved CAD export • Version control for CAD data • Sub-volume field monitors • Automated set-up of multiphysics SAM processes • Improved results plotting Transient solver • Improved hexahedral meshing • Time-averaged power loss monitor • Combined CPU-GPU computing TLM solver • Preview of PERFECT BOUNDARY APPROXIMATION (PBA) meshing Frequency domain solver • Improved tetrahedral meshing Integral equation solver • Nearfield monitors Asymptotic solver • RCS hotspot highlight EDA • Enhanced EDA import tools • Decoupling capacitor optimization Materials • New cable and shield types • Time-dependent conductivity materials • Partially-saturated ferrites Circuit simulation • Transient spectrum extraction with AC Task • Faster MOR and Transient Task ■ CST www.cst.com ADS Controlled Impedance Line Designer Solves Key Challenges in Designing Chip-to-Chip Links Agilent Technologies Inc. introduced Agilent EEsof EDA’s Controlled Impedance Line Designer. The software product quickly and accurately optimizes stack up and line geometry for multigigabitper-second chip-to-chip links, using the most relevant metric. The product, available as an add-on to Advanced Design System 2014 uses a novel approach to design controlled impedance transmission lines. Previous tools for this task allowed only for line characteristics, such as frequency response, as the optimization goal. In modern chip-to-chip links, this metric has become less relevant because it doesn’t take holistic effects of the end-to-end link into account. Most important, the effect of the equalizer in the receiver is ignored. The metric that matters today is the post-equalization eye opening. The integration of Agilent’s Controlled Impedance Line Designer and the existing Channel Simulator in ADS rectifies this situation by letting engineers see a set of eye openings that result from sweeping through the pre-layout design parameters (e.g., line width). To ensure accurate calculation of the transmission line characteristics, the software automatically employs a fast, crosssectional (2D) electromagnetic field solver. The dielectric layers are modeled using the frequency-dependent Svensson/Djordjevic permittivity, which ensures both accuracy and delay causality. The metal layer model accounts for conductivity, skin effect, and top and bottom surface roughness. The Controlled Impedance Line Designer also includes a provision to determine the effect of manufacturing variation on input parameters, such as thickness on the output parameters (e.g., impedance). ■ Agilent Technologies www.agilent.com 56 hf-praxis 6/2014

RF & Wireless Microwave Components New compact rotary joint saves space in Ka-band SOTM applications Link Microtek has expanded its range of rotary joints with a new compact dual-channel coaxial model that has been specifically designed for use in low-profile Ka-band satellite-on-the-move (SOTM) terminals in either military or commercial applications. Manufactured at Link Microtek’s premises in the centre of Basingstoke, the AMCORJD- Ka rotary joint features a central K-type coaxial channel for transmissions in the 27.5 to 31.0 GHz range, together with an outer DC-3 GHz SMA coaxial channel for L-band receive signals. Microwave performance is excellent, with the transmit channel offering an average power rating of 20 W, a VSWR of 1.5:1 and a maximum insertion loss of 1.0 dB. The receive channel can handle an average power of 1 W, and its VSWR and maximum insertion loss are 1.5:1 and 0.25 dB respectively. Isolation between the two channels is a minimum of 50 dB. The device has been successfully tested with currents as high as 2 A at 24 V, which means that DC can be fed down the outer channel to drive not only the terminal’s LNB but also the motors that enable the antenna to track a satellite while the host vehicle is moving. Fabricated in aluminium with an Iridite finish, the rotary joint has a body diameter of 31.75 mm and a length of just 37.72 mm excluding connectors. It High Power S band Drop-in Isolator Renaissance has developed a new low cost, high power, drop-in isolator to protect expensive amplifiers from unwanted reflected power levels at S band frequencies. Covering 2.7 – 2.9 GHz, this isolator provides a VSWR of 1.25:1 at input and output ports with loss of 0.4 dB and isolation of 20 dB over -30 to +85 °C. Optimized for Aeronautical Communication and Navigation Systems, this isolator can be provided in phased matched sets. incorporates a 50.45 mm-diameter flange as standard and can also be supplied with an integral slip-ring assembly if required. Other outline configurations and sizes are available on request, tailored to suit specific antenna requirements, while for applications where a higher power-handling capability is needed, the device can be specified with a waveguide transmit channel instead of a coaxial connector. ■ Link Microtek Ltd www.linkmicrotekeng.com 4.5 kW Peak Power L-Band Drop-in Circulator, 3G3NAG Renaissance has released a new L-band 4.5 kW peak power drop-in circulator operating from 1 to 1.12 GHz. With insertion loss of less than 0.2 dB and with return loss and isolation over 23 dB, the circulator is ideal to duplex an antenna with HPA and a receiver. This circulator has been customized to withstand 50W of forward and 100 W of reverse power at the same instance without arcing or corona failures. ■ Renaissance www.rec-usa.com E-Band Waveguide Low Pass Filter Spacek Labs model LPF1-86-11 is an E-Band low pass filter in WR-12 waveguide. It has a pass band of 71 to 86 GHz with an insertion loss of 1.5 dB typ and 2 dB max. The reject band is 91 to 140 GHz, with 20 dB rejection at 91 GHz and 35 dB minimum over the rest of the band.This series of filters can be made from 18 to 110 GHz and can be designed with a sharp cut off as close as 5% of the band edge frequency. With full in-house design, manufacturing and testing capability, Spacek Labs can customize these filters to suit any application or form factor. ■ Spacek Labs, Inc. www.spaceklabs.com hf-praxis 6/2014 57

hf-praxis

PC & Industrie

© beam-Verlag Dipl.-Ing. Reinhard Birchel