Microwave Engineering Europe - May 2008 - (Page 38)

38 PRODUCTS TCXO/VCTCXO series offers Stratum III stability available in frequencies of 10 MHz to 20 MHz FOX331 series, HCMOS, temperature-controlled oscillators (TCXOs) and voltage-controlled temperature-controlled oscillators (VCTCXOs), from Fox Electronics, feature Stratum III stability. They are designed to comply with the Telcordia GR 1244 specification, which requires a daily stability of 0.37 ppm and a frequency stability of less than 4.6 ppm for 20 years. Featuring a small profile of 7.0 mm (L) x 5.0 mm (H) x 2.0 mm (W) as well as 3.3 V operation, this oscillator family is ideal for telecom network applications including data and voice transfer, base stations, telecom infrastructure and network synchronization. The series is available in frequencies of 10 MHz to 20 MHz and offers an overall frequency stability of ±4.6 ppm as Small wideband RF tuner designed for both Rx and Tx filter applications RF200-2500TUNV1 is the first in a family from NuWaves Engineering of wideband, RF tuners (HiPerTUNER) that is designed for both receiver and transmitter filter applications. The tuner can be used as a premier pre-selector in a receiver or as a post filtering in the transmit-driver. It covers an industry first wide frequency range of 200 MHz to 2500 MHz with multiple cascaded tunable varactor tuned filters to achieve superior out-of-band frequency rejection. The modular unit is housed in a small ruggedized aluminum chassis measuring 6.50- x 4.00- x 0.70-inches (16.5- x 10.2- x 1.8-cm). HiPerTUNER uses SMA connectors to provide the end user with design versatility. The digital and power interface is a mini-DIN 9-pin connector. The hardware can be easily configured with commands from a RS232 formatted input from any terminal program to control the attenuation level and frequency selection. Depending on the selected frequency, the typical bandwidth will range from 2to 4-percent www.mwee.com/207401128 well as ±0.28 ppm over a temperature range of 20 to +70 degrees Celsius and ±0.37 ppm over a temperature range of -40 to +85 degrees Celsius. Storage temperature range is -55 to +125 degrees Celsius. In addition, the oscillators offer a phase noise of -120 dBc/Hz at an offset of 100 Hz, -140 dBc/Hz at an offset of 1 kHz and of -148 dBc/Hz at an offset of 10 kHz. The series has a source current (IOH) and a sink current (IOL) of 6 mA. Input current (IDD) is 6 mA. www.mwee.com/207100183 2.4-GHz ISM band transceiver cuts power and triples range Nordic Semiconductor’s nRF24L01+ single chip 2.4GHz transceiver delivers better performance and a lower peak power than competitors. The chip’s new 250 kbps data rate mode triples operating range, and it has drop-in compatibility with Nordic’s existing industryleading nRF24L01 2.4GHz ULP transceiver. The nRF24L01+ provides radio performance for true ULP 2.4-GHz radio solutions. Enhancements in wideband blocking and intermodulation performance provide a future-proofed solution for environments prone to intensive Wi-Fi interference. A fast front-end automatic gain control (AGC) improves dynamic range and operational robustness with close proximity interferers. The single chip 2.4GHz transceiver continues Nordic’s legacy as offering true ULP wireless solutions. With a peak current of only 13.5mA, it can run applications on standard coin cell batteries for multiple years. Prime coin cell batterypowered applications for the transceiver include wristwatches and wireless sensors. Prime AA or AAA battery-powered application examples include wireless mice, keyboards and RF remote controls that would beneﬁt from battery lifetimes of up to one year. The nRF24L01+ extends the feature set of the nRF24L01 with a 250 kbps data rate option that by providing -94dBm sensitivity, can extend operating range by around 3x compared to the 1 Mbps mode. The 250kbps mode is fully air compatible with the 250 kbps mode in the company’s previous generation nRF2401A transceiver, providing a direct migration path to a better cost, power, and performance solution in existing designs. The nRF24L01+ is fully drop-in compatible with the nRF24L01, mechanically, functionally and electrically. Production samples and evaluation kits are available. www.mwee.com/207100262 65-nm Mobile WiMAX chip 40 Mbit/s data rate, consumes at least 30 percent less Beceem Communications has developed a 65-nm WiMAX Wave 2 device, the BCSM250, that it claims is the first to combine a Wave 2 baseband, dual-band radio, memory and power management in a single chip. Housed in an 11-mm x 11-mm package, the IC reduces power consumption by at least 30 percent compared with existing solutions while increasing peak data rates to 40 Mbit/s, according to the company. Its feature set allows WiMAX to be embedded in virtually any consumer device. While the BCSM250 combines a baseband processor, dual-band 2 GHz and 3 GHz radio, memory, power management unit and host interfaces in a single chip, it also includes previously external components such as a USB 2.0 PHY and power management circuits, which reduce the total number of components required for a complete Mobile WiMAX subsystem by up to 60 percent. Built on top of its full Maximum Likelihood (ML) MIMO decoder, the BCSM250 baseband also incorporates improved interference cancellation, advanced channel estimation and improved logarithmic likelihood-ratio (LLR) selection. All these improvements combine to provide receiver performance of up to 40-Mbit/s MIMO throughput and sustainable operation at negative signal to noise ratios. www.mwee.com/207100265 Microwave Engineering Europe ● May 2008 ● www.mwee.com http://www.mwee.com/207401128 http://www.mwee.com/207100183 http://www.mwee.com/207100265 http://www.mwee.com/207100262 http://www.mwee.com

Table of Contents Feed for the Digital Edition of Microwave Engineering Europe - May 2008

Microwave Engineering Europe - May 2008 News Contents Comment Cover Feature: How to Succeed as a GaAs Foundry Wireless Networking: Wireless Coverage Where Everybody WINS Wireless Networking: Achieving Good Coexistence in the 2.4 GHz ISM Band GPS and Satellite: GPS developments: Galileo Moves Forward with Successful Giove-B Satellite Launch — Broadcom Targets AGPS in Mobile Phones and Devices Raising the Bar for the Radio: Making 802.11n Work Reducing Power Consumption in Ultrawideband Chips WiMax Catches Second Test Wave Products Calendar

Microwave Engineering Europe - May 2008

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.