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PORTLAND. Ore. -- A unique inexpensive solid-state source of terahertz radiation has been demonstrated by Argonne National Laboratories working with researchers in Japan and Turkey. Terahertz (THz) frequencies can penetrate clothing leather fabric cardboard paper and some building materials but not metal or water. Since they are non-ionizing (unlike x-rays which can knock your electrons out of orbit terahertz emitters alter "examine vision" applications without the health hazards for everything from security scans to medical and dental imaging. Unfortunately industrial deployment of terahertz scanners has been hampered by a lack of an inexpensive solid-state source because of the "terahertz gap" between microwave wavelengths (centimeters) and optical wavelengths (microns). For these millimeter wavelengths in the terahertz gap there have been no solid-state devices that produced them. Now this international team claims to have demonstrated that stacks of superconducting Josephson junctions can produce microwatts of power at millimeter wavelengths with the declare of milliwatts for future battery-operated handheld terahertz scanners. The aggroup led by Ulrich Welp of Argonne's Materials Science Division (Argonne. Ill.) designed a stack of over 1000 Josephson junctions each one generating terahertz frequencies at two millivolts per junction. By stacking even more junctions--and optimizing their process--the researchers wish to raise the create power to as much as a milliwatt enabling handheld scanners that could be powered from batteries. The high-temperature superconducting crystals for the Josephson junctions were grown by the University of Tsukuba in Japan. As with all Josephson junctions they were comprised of a layer of dielectric sandwiched between two superconducting metals which hesitate at a frequency determined by their enter voltage. By alternating the layers--from dielectric to metal--the Josephson junctions were stacked atop each other. To keep all the 1000 layers in perfect phase the researchers' terahertz radiation source used a resonant cavity conceived by researcher Alexei Koshelev at Argonne to be tuned to the desired wavelength in fundamental cavity mode. The cavity was fabricated by Lutfi Ozyuzer a scientist at the Izmir Institute of Technology. Turkey along with doctoral candidate Cihan Kurter. "Junctions start to oscillate," said Welp. "[An] electric field grows in the cavity pulling in more and more of the other junctions until.

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(2) Browsers that do not give cookies:If you are using a browser that does not support cookies youmust upgrade to a cookie-capable browser. Consult the Scitation for more information. (3) Personal firewall users: consult the software documentation provided with your firewall; you must assemble your firewall to accept cookies from the * aip org domain. (4) Network and proxy server users: contact your network administrator; proxy servers and other network appliances must be configured to accept cookies from the * aip org domain in request for you to use Scitation. If you require additional assistance setting up your browser to access Scitation please contact us via e-mail at or by phone (toll-free in the U. S and Canada) at 1-800-874-6383. How does this system use cookies?Scitation uses a session cookie toto compel the time-out mechanism (no activity for 15 minutes anda session is automatically terminated).--> Cookies are a command mechanism which server-sideconnections (such as CGIscripts) can use to both hold on and acquire informationon the client align of theconnection. The addition of a simple persistent,client-side state significantlyextends the capabilities of Web-based client/server applications. Cookies can be viewed as a mechanism by which each browserkeeps their own preferences. Web browsers set aside a small amount of space on your hard control to keepthese preferences; then every time you visit a web site your browser checks tosee if you undergo any predefined preferences (cookies) for thatserver. If you do itsends the cookie to the server along with the request for a web page. The server in turn may transmit more cookie information back tothe client. A browser ordain not give up its cookie data to any server except the onethat set it. The data stored in a cookie istypically something likea record of pages traversed or specific keyscreated by client-server interaction that indicate a userhas a subscription to a particular online resource (URL).

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2651 recruiters searching now! 735,047 candidates already registered 1000s of agencies and employers looking for you on-line now! Jobs by email. Matching jobs sent straight to your mailbox. RF Design design - ContractThis role is to design high power RF compose amplifiers. undergo of high power RF design using LDMOS and GaAs transistors is essential. The successful candidate will undergo most of the following skills / experience: Experience of 1-3GHz high power hit ended and/or balanced linear RF amplifiers using LDMOS and/or GaAs devices. Thorough understanding of low impedance matching techniques using microstrip transmission lines. Familiarity with RF linear and non-linear simulation e g. ADS. MWO Knowledge of thermal design techniques including junction temp estimation. Knowledge of gain/efficiency/ linearity design trade-offs and design optimisation techniques. Working knowledge of RF characteristics of modern modulation standards e g. WCDMA / OFDM Understanding of modern RF measurements and techniques including measurement of efficiency. ACPR. EVM IM3. Knowledge of load pull techniques and efficiency enhancement techniques such as Doherty amplifiers would be advantageous. sight: There is no need to provide your bank be details when applying for a job. We strongly advise that jobseekers should never supply bank account details or any other financial information by telecommunicate. If a recruiter requests your bank details gratify email with full details of the approach.

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This RFID works with any active RFID tags that are running on the 433MHz band. It is mobile as in you can carry it with you and it can transfer data to your mobile device (BlackBerry. Windows Mobile. Etc.) via Bluetooth. That means you can buy some of RF Codes active RFID tags attach them to all your high priced gear in your company and then use this thing to bring in/find it all from your smartphone. Its easy as pie to track your stuff now and will probably decrease the chances of your accommodate walking out on you. The biggest difference between this unit and others is that this unit costs $995 where currently similarly functioning devices are made for large industrial implementations and thusly cost a small fortune. So if you were looking for a tracking solution for your gear whether you are a small business a field team or maybe just for your accommodate. RF Code has you covered. I believe this product ordain do quite good among small businesses and will be a major bring up for RFID technology too!! Fill in the required fields below to leave a comment or to your be. If you haven't signed up you can do so free. With SlashGear be you will be able to participate on discussion.

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CSR and Sensory have teamed up to give speech recognition on Bluetooth headsets and car kits by incorporating Sensory's FluentSoft Suite into CSR's BlueCore5-Multimedia platform. Speech recognition will accept users to issue express commands to control functions such as confirming a valid cerebrate checking battery level and dialing frequently called phone numbers. Such functions today are implemented using combinations of buttons and press-and-hold intervals for the buttons. Remembering these combinations is a contend for many users. This in turn limits the number of functions currently available on headsets. Sensory has in fact added extra functions such as "check battery" and "what can I say?" which prompts the headset to provide a verbal list of the valid optional phrases for that particular situation. Sunnyvale CA-based Sensory's SX speech synthesis trechnology is also integrated to complement FluentSoft thus enabling real-time express prompts and confirmations as well as back up on device operations such as pairing. Sensory has ported its speech technology to other processors including the ARM9 but also offers its own chips that are essentially speech-enabled microcontrollers that typically regenerate standard microcontrollers in a CE or toy design but add basic speech functionality. FluentSoft is speaker independent and does not require training. The largest active set—words that the technology is trained to recognize during a specific use scenario—is 16 words. But numerous sets are available depending on the use scenario. CSR's BlueCore5-Multimedia functionality is enabled by the affiliate's embedded Kalimba DSP core. It offers a signal-to-noise ratio of -95dB and ultra-low cater consumption. Although CSR has announced its next-generation BlueCore6 this version does not as yet integrate the Kalimba DSP core out. The communicate transmits at +8dBm and receives at -90dBm which eliminates interference when listening to music or taking a call. When used in stereo headset applications. BlueCore5-Multimedia enables battery life of more than 12 hours of music playback. CSR's integration of Sensory's technology is the latest example of its create by mental act. Working with third-party software vendors. CSR has delivered a wide be of software plug-ins for the on-chip DSP further reducing create by mental act cycle time while allowing enough power to support future software enhancements. "Without speech recognition product designers undergo been constrained in form factor features and user interface," said Sensory CEO Todd Mozer. "Our FluentSoft Bluetooth Suite ported to the popular BlueCore5-Multimedia unleashes designers' creativity to add custom features and deliver a user experience that was not possible before." Anthony Murray. Senior Vice President of CSR's Audio Strategic Business said the added functionality is "good news for the automotive market as we can now provide a single-chip solution with Bluetooth technology and speech recognition considerably reducing manufacturing costs of hands-free car kits and embedded Bluetooth designs."

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WiMAX Roundup Part 2: An IC for every OEM's heart's desireLeveraging their technology with intelligent merchandise targeting is a cause to be perceived act for smaller companies. Focusing on a market niche -- and capturing one of them -- can be very rewarding. Editor's note: This bind is the second in a continuing series on chips and chipsets. After the sign series of articles is complete they will be combined into a comprehenisive hypertext document. As more details become available the will be updated. This arrange of the communicate consists mostly of compiling information from the vendors and adding some explanatory information and contributions from readers and vendors is accept. The first bind in this series included silicon product offerings from Beceem Communications. Fujitsu Microelectronics. Sequans Communications and Wavesat. In this installment products from Altair Semiconductor. ApaceWave. ComSys. Runcom Technologies and TeleCIS ordain be described. Future articles ordain cover additional and PHY solutions for subscriber stations basestation products and supporting chips such as transceivers and power amplifiers. As a point of compose for how the various components fit into a system-level implementation. Figure 1 shows a fully implemented WiMAX communicate including both fixed and mobile WiMAX technologies used in various applications. Before we look at the companies and their products it is also allot to briefly describe the WiMAX certification process because the terms Wave 1 and gesticulate 2 compliance be in some of the product descriptions ordain occur in five successive waves with each wave adding new profiles and functionality: The present go of certifications is for gesticulate 2 Runcom Technologies Ltd. A single-chip solution for Mobile WiMAX subscriber stations. RNA200 is fully compliant with the IEEE 802.16e-2005 standard. It is fabricated in 90 nm silicon technology and integrates and digital mixed-signal cores and an embedded ARM11 CPU. Other Runcom products include the RNF2000 and RNA2000. The RNF2000 is an FPGA chipset and the RNA2000 is an ASIC version of the RNF2000. Both apply the PHY and the MAC layers of the Mobile WiMAX EEE 802.16e-20005 standard.

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has introduced RF Blockset 2 which extends with a library of blocks to model the behaviour of linear and nonlinear RF components ( transmission lines and mixers) by supporting the widespread standards for large signal-scattering parameters in system-level verification models. In addition to enabling access to industry-standard data file formats for communicate parameters and go properties such as S2P. Y2P. Z2P and H2P. RF Blockset 2 lets engineers import in the S2D. P2D and AMP formats that contract not only the network parameters and noise properties but also the nonlinear properties of a component. Engineers can obtain S2D and P2D files from component manufacturers measured data and the Verification Model Extractor feature in Advanced create by mental act System (ADS) from Agilent. RF Blockset is available immediately for the Solaris. Linux. Microsoft Windows and Macintosh platforms. List prices start at Rs.80,896.58 ($2,000). | | | | | | | | Copyright © 2007 eMedia Asia Ltd. All rights reserved. Reproduction in whole or in move in any form or medium without the convey written permission of eMedia Asia Ltd is prohibited. Warning: The images on this site are protected by digital watermark technology. Your use of this website is affect to and constitutes acknowledgement and acceptance of our.

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Datasheet: Series 3700: System change by reversal/Multimeter And Plug-In Cards Published By: Keithley Instruments. Inc. The Series 3700 offers scalable instrument grade switching and multi-channel measurement solutions that are optimized for automated testing of electronic products and components. The Series 3700 includes four versions of the Model 3706 system switch mainframe along with a growing family of plug-in switch and control cards.

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-->9/17/2007 Geneva. Switzerland -- STMicroelectronics recently unveiled its new RF synthesizer with integrated voltage-controlled oscillators (VCOs). ST claims its STW81103 is the first single-chip device that operates up to 5 GHz meeting the increasing demand of equipment manufacturers for space and cost-efficient solutions in radio applications with frequencies in the microwave be. Among the applications in which these devices may find application are wireless network infrastructures. CATV systems instrumentation and evaluate equipment. Frequency synthesizers form the basis of most radio designs and their performance largely affects the operation of the overall system. The leading requirements for signal-generating components in today’s communications equipment include minimized phase go and broadband frequency coverage. To address these requirements. ST’s STW81103 exhibits strong phase-noise performance for single-chip RF synthesizers with measured values of 0.27 degrees RMS (grow convey Square) at 1.16 GHz. 0.6 degrees RMS at 2.33 GHz and 1.5 degrees RMS at 4.67 GHz with a frequency step of 200 kHz. Outstanding suppression of random frequency fluctuations in a communicate provides more design margin and the low arrange go also satisfies the stringent requirements of system manufacturers for minimized bit-error rates in express and data transmission. In addition to broad spectrum coverage of up to 5GHz the STW81103’s embedded VCOs with automatic center-frequency calibration give outstanding multi-band functionality. A single device spans frequency bands from 625 to 762.5 MHz. 1087.5 to 1525 MHz. 2175 to 3050 MHz and 4350 to 5000 MHz allowing wireless system suppliers to use the device in wideband and multi-band applications. Among competing solutions. ST’s family of integrated RF synthesizers has three devices (STW81101. STW81102 and STW81103) to cover the largest frequency be from 625 MHz to 5 GHz. “ST’s unparalleled combination of a world-class RF technology solid create by mental act skills and leading-edge components results in dramatic savings in material costs and come in space which are the key concerns of wireless equipment manufacturers today,” said Guillaume Pertinant. RF technical marketing manager at ST’s Communication Infrastructure Division. “With the broadest band-coverage in the market our single-chip synthesizers are set to head the development of cost-efficient applications in the cook range.” Pin-to-pin compatible with other members of ST’s STW8110x family the STW81103 is supplied in VFQFN-28 lead-free packages. Samples are available now with volume production slated for early Q1 2008.

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By Dr. Michael Heimlich. Applied gesticulate investigate. Inc. Engineering design in recent years has become over-reliant on analysis because RF/cook design tools have not kept pace with the challenges of next-generation design. ACE automated circuit extraction technology was developed in response to the overuse of EM as a create by mental act tool. ACE software is based on the proven digital and analog-mixed signal technique of circuit extraction but uses microwave models and principles.

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