Mixed Signal Spearheading the Need for Improved Design Methodologies
Oct 1, 2002
By Henry Y. Chang Mixed-signal ICs are ushering in a new era of amazing possibilities for systems-on-a-chip (SoC) design. Nowadays it's not uncommon to incorporate hundreds of thousands or even millions of gates onto a single chip, including a sizable peripheral analog circuitry. And because mixed-signal devices feature increasingly complex analog components, it's spearheading the need for improved design methodologies....
W. L. Gore, Alvesta cross-license transceivers
Oct 1, 2002
W. L. Gore & Associates and Alvesta have announced their decision to cross-license 4-channel parallel optic transceivers as defined by the QuadLink MSA,...
software
Oct 1, 2002
SystemView brings network device models designers Elanix has upgraded its software by integrating network device models into a single-kernel engine that...
product focus Time & Frequency
Oct 1, 2002
Compact crystal offers low aging Rakon has released two crystals that offer a small footprint and low aging features into a single compact package. The...
Designing MIMO systems for Reliable Coverage in Non-LOS Wireless Links
Oct 1, 2002
By Victor Shtrom, Ph.D. Jose Tellado, Ph.D. and Professor A. Paulraj Providing wireline reliability in non-line-of-sight wireless environments presents a particular set of challenges. Difficulties lie in the fact that the received signal power at a location in space is not constant. This truism of wireless communications underscores one of the wireless industry's greatest challenges in enabling broadband wireless connectivity. Recently, multiple antenna technologies have demonstrated notable success in defeating early systems' LOS limitations....
The times they are a changin'
Oct 1, 2002
By Roger Lesser editor rlesser@primediabusiness.com In the last two columns I've addressed the reborn military market. I'd like to now offer insights into how to get the money....
PC card Bluetooth test set
Oct 1, 2002
Full-featured Bluetooth protocol analyzer in a PC card format Computer Access Technology has developed the Merlin Mobile Bluetooth protocol analyzer,...
BUSINESS BRIEFS
Oct 1, 2002
Spirent and UbiNetics enter into strategic partnership Spirent and UbiNetics announced that they have entered into a strategic partnership to expand test...
ARM, SMIC develop test chip for China
Oct 1, 2002
ARM and Semiconductor Manufacturing International Corp. announced that the two companies have signed an agreement to develop an ARM7TDMI microprocessor...
Designing High Efficiency Overdriven and Saturated Power Amplifiers
Oct 1, 2002
By Francisco Javier Ortega-González, Alberto Asensio-López, Alberto Martín-Consuegra It is common knowledge that efficiency is a major issue with the design of any transmitter. The benefits of high efficiency include power consumption, low power derating and high reliability, among others. In order to improve efficiency several specific amplification classes, such as class E1 have been described in classical literature. Nevertheless, the strict conditions required by high efficiency amplification techniques are difficult to achieved at high frequencies....
Rockwell Collins Selected for New Gulfstream G150
Oct 1, 2002
Rockwell Collins has been selected to provide its Collins Pro Line 21 integrated avionics system for the new Gulfstream G150 aircraft. The announcement...
literature
Oct 1, 2002
New 116-page cable catalog unveiled Precision Tube's new catalog describes its broad line of semi-rigid cables, delay lines, and flexible cables. Semi-rigid...
The based are loaded the score is tied the count is full
Oct 1, 2002
by Ernest Worthman technology editor eworthman@primediabusiness.com And you need a beer. You may recall that in the July issue of RF Design I had a bit of a fun with an off-the-wall project by a company called 2Scoot Networks....
RF Micro Devices ships two million WLAN transceivers
Oct 1, 2002
RF Micro Devices has announced that it has shipped more than two million wireless local area network (WLAN) transceivers. RF Micro Devices has increased...
EDGE Modulation — How Linearization Improves Amplifier Performance
Oct 1, 2002
By T. J. Fergus Historically, the global system for mobile Communications was intended to make power amplifier design simpler. With the introduction of high order modulation schemes for 2.5 and 3G, the design challenges presented to the PA have increased significantly. This article describes the design and implementation of a polar loop to improve the efficiency of a gallium-arsenide field effect transistor (GaAs FET) power operating at 1.91 GHz....
Ethertronics' technology deployed with Microtune
Oct 1, 2002
Ethertronics has announced that its M Series embedded antennas have been selected for the MT0750 Bluetooth headset reference design from Microtune Inc....
products
Oct 1, 2002
5 GHz SiGe transistors NEC has introduced a series of 5 GHz NPN silicon germanium transistors. Ideal for use as LNA devices in wireless LAN, cordless...
Think the unthinkable abandon 3G
Sep 1, 2002
by Ernest Worthman Technology Editor eworthman@primediabusiness.com The bloodletting of the wireless industry (as well as the overall telecom industry) has been going on for over two-years now. And, there still aren't any real indicators that 3G has an immediate future....
products
Sep 1, 2002
High-efficiency GSM/GPRS power amplifier Raytheon has introduced RMPA1958-99, a high efficiency power amplifier module for GSM/GPRS quad-band applications....
product focus bluetooth/802.11/WAP
Sep 1, 2002
Bluetooth-enabled modular product family SMART Modular Technologies debuts its latest offering of wireless solutions that transmit and receive Bluetooth...
Home networking leaps to digital
Sep 1, 2002
By Guillaume Bichot, Louis Litwin and Kumar Ramaswamy Keeping up with the demand and proliferation of technologies and applications, home networking breaks the analog barriers....
MEMS for wireless apps
Sep 1, 2002
300 kHz to 6 GHz RF MEMS single-pole, double-throw (SPDT) switch Teravicta has developed the TT612, an ultra-low loss, 300 kHz to 6 GHz RF MEMS single-pole,...
BUSINESS BRIEFS
Sep 1, 2002
Spectrum Control acquire FSY Microwave Spectrum Control, Fairview, Pa., has acquired all of the outstanding common stock of FSY Microwave, Columbia, Md....
Peregrine dedicates unit to space and defense markets
Sep 1, 2002
Peregrine Semiconductor, San Diego, Calif., has dedicated a company unit specifically targeted at developing products for the stringent quality needs...
Indoor propagation issues for wireless LANs
Sep 1, 2002
By Dan Dobkin Wireless local area networks (WLANs) are rapidly gaining popularity. These networks are primarily targeted for indoor use, and most often use the unlicensed bands at 2.4 to 2.5 GHz or 5.15 to 5.85 GHz. It is often said that the higher-frequency unlicensed national information infrastructure band at 5.15 to 5.85 GHz will be intrinsically limited to shorter ranges than the industrial/scientific/medical band due to higher path loss. The purpose of this investigation was to examine that claim....
