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Featured Technology The Testing Needs of WLAN Technology

August 30, 2004 7:07 am | Product Releases | Comments

In order for Wireless LANs to achieve the performance demanded by corporate buyers, equipment and chipset manufacturers will need better test equipment. By Dr. Thomas Alexander, Rick Denker, and Gerard Goubert Today's WLANs resemble the early days of cell phones, whose first users were driven by the great convenience, and whose later users demanded much more sophisticated features and reliability: the transparent roaming, compact equipm...

Cover Story Integrating Ultra CMOS Designs in GSM Front Ends

August 30, 2004 7:06 am | Product Releases | Comments

Today's handsets require an RF front-end that can select between transmit and receive, as well as select different frequency bands. New processes remove the size and bulk associated with traditional switching devices. By Dylan Kelly Early handset designs could duplex between transmit and receive using a circulator (see Figure 1a)....

Frequency Multiplier Chips

August 18, 2004 10:03 am | Product Releases | Comments

Hittite introduces two low noise GaAs PHEMT x2 active frequency multiplier chips. These broadband multipliers are suitable for use in LO multiplier chains in microwave and VSAT radios yielding reduced inventory count vs. traditional approaches. When driven with a 0 dBm signal, the HMC448 provides +11 dBm of typical output power and excellent Fo and 3Fo isolation of 20 dB with respect to the output level....

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Featured Technology Simplified Lossy Filter Design

August 17, 2004 11:43 am | Product Releases | Comments

Minimax lossy filters are designed with only one data table and two attenuation charts to produce direct-coupled bandpass filters using dissipative physical components. By Thomas R. Cuthbert RF filter designers have long been concerned about the fact that all components are lossy, i.e., dissipate some energy, all the while developing sophisticated ways to design lossless filters that produce classical response shapes 1 ....

Source Assembly

August 12, 2004 11:21 am | Product Releases | Comments

TRAK Microwave introduces a dual crystal based source assembly for airborne defense applications. The source assembly features dual frequency output, RF and DC enabled outputs, low phase noise, and rugged construction. The Model MFS127 operates at frequencies of 1020 and 5100 MHz with typical electrical specifications that include long term frequency stability of 䔽 ppm, RF enabled speed of the 1020 MHz port of 1 microsecond with an of...

GSM/GPRS/EDGE Radio

August 12, 2004 11:21 am | Product Releases | Comments

Silicon Laboratories announces the Aero™ EDGE Radio, an integrated, high performance radio for GSM/GPRS/EDGE cellular handsets. The radio provides a complete turnkey reference design for a quad-band GSM/GPRS/EDGE radio simplifying design and manufacturing and providing a solution that enables manufacturers to deliver feature-rich EDGE handsets, radio modems, and modules....

Power Divider/Combiner

August 12, 2004 11:21 am | Product Releases | Comments

RLC Electronics' series D-0640-2 is a 6.0 to 40 GHz two-way in phase power divider/combiner. It uses a multi-section "Wilkinson" type design with good electrical performance over the frequency range. This was accomplished by technology in design and precision etching of a single microstrip board....

Diplexer

August 12, 2004 11:21 am | Product Releases | Comments

K&L Microwave announces the availability of the 5LZ10-00021 cellular/PCS & WLL/Wi-Fi diplexer. The device can be used in in-building/tunnel communication distribution systems for where low loss and high isolation are required. The diplexer offers insertion loss of 1.0 dB maximum ( K&L Microwave, Inc....

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Scaling InP Transistors for RF and Mixed Signal Applications

August 12, 2004 10:54 am | Product Releases | Comments

Indium Phosphide is maturing as a mainstream technology for both electronic and optical functions. By Minh Le Indium Phosphide has compelling properties that make it a useful material for both electronic and optical functions. It is a direct bandgap semiconductor whose energy gap allows the generation and detection of light at 1....

Automating DSP Algorithm Design for Wireless Applications

August 11, 2004 7:38 am | Product Releases | Comments

Designing complex signal processing algorithms for DSPs in today's wireless systems can be a long and arduous task. Automating the process is more accurate, efficient and repeatable, and makes modeling them almost enjoyable. By Marc Barberis Modern wireless systems require the use of complex signal processing algorithms to perform operations such as Viterbi or turbo decoding, equalization, channel estimation, Fast Hadamard Transforms, ...

GSM Switch

August 3, 2004 5:24 am | Product Releases | Comments

TriQuint's TQP4M4010 GSM switch integrates a logic decoder using an E/D pHEMT process optimized for excellent harmonic performance. The logic decoder function eliminates an external CMOS driver chip. Despite increased functionality, this SP4T still resides in a 2.5 x 2.5 x 0.6 mm (SLIM-17) package....

Switched Filter

August 3, 2004 5:24 am | Product Releases | Comments

TRAK introduces a C-Band five channel switched filter assembly used in airborne defense applications. The switch filter features an ultra miniature, low profile design with less than 10 dB passband insertion loss and 60 dB typical stop and rejection at 𫕜 MHz. The model SWF002 has a high speed switching at less than 100 nanoseconds, is hermetically sealed and laser welded with a better than 350,000 hours MTBF....

Noise and Interference Generator

August 3, 2004 5:24 am | Product Releases | Comments

Noise Com announces the E911 Noise and Interference Generator, which provides an expandable, easy-to-use platform for testing the susceptibility to interference of E911 applications on cellular phones, as well as GPS receivers used in airborne, automotive, defense, and mobile locations. The generator is equipped with one or optionally two independent arbitrary waveform generators capable of 40 MHz bandwidth for interference generation over ...

Packaging for SiGe Transistors

August 3, 2004 5:24 am | Product Releases | Comments

NEC introduces a flat lead package developed specifically for use with its high breakdown voltage SiGe transistors. The M16 package measures 1.2 × 1.0 × 0.5 mm (including leads). Available in the M16 package are the NESG2021, NESG2031, and NESG2101. These transistors are suited for use in LNAs, gain blocks, and oscillators in a variety of applications from 800 MHz to 6 GHz where small size and low profile are critical....

Well, Blow My Ear Off

August 3, 2004 5:23 am | Product Releases | Comments

Ern Worthman, Technology and Editorial Director Every now and then I have to take a bit of editorial license and find the humor in, what most of the time is, serious business. In this particular case, I'm referring to the emerging fuel cell industry. Now don't get me wrong. I'm a big proponent of fuel cells technology....

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