Microwave Engineering Europe - September 2008 - (Page 40)

40 PRODUCTS Frequency agile RF receiver chip targets AMR and remote controls The first in a family of highly integrated RF receivers, the MLX71122 from Melexis is a frequency agile multi-channel receiver IC designed for applications in the unlicensed Industrial-Scientific-Medical (ISM) and Short-RangeDevices (SRD) frequency bands at 300 to 930 MHz. All multi-channel, multiband and frequency-agile lowpower RF systems benefit from the receiver’s programmable PLL. This enables addressing all sub-bands of the European 863 to 870 MHz band just by software. Even large frequency jumps across regionally different bands like the US 315 MHz or 915 MHz as well as the European 433 MHz are possible without changing the RF hardware. Manufacturers of world-wide equipment for Automatic Meter Reading (AMR) and RF remote controls benefit through the simplification of their production logistics and the indirect reduction in cost. The device comes in a 32 lead QFN package with a footprint of 5-mm x 5-mm and requires no bulky external ceramic filter and discriminator components. The receiver IC accepts supply voltages from 3 V to 5.5 V with a typical current consumption of 11 mA. In standby mode the current Miniature wideband diplexer wide band design covers global frequencies Radio Frequency Systems (RFS) claims to offer the world’s smallest and most costeffective wideband diplexer range — the FD9R6004 series. Industry leading electrical performance and installation flexibility, coupled with compact size, low weight and cost-effective design, makes the diplexer series an ideal first for network overlays worldwide. Offering a global RF solution, the series has been designed to enable feeder cable sharing between systems in the 806 to 960 MHz and 1710 to 2200 MHz ranges, and supports the increasing prevalence of multi-band networks across the globe. Thanks to its wideband design, the diplexer series can accommodate the combining of a number of wireless communications services, such as Cellular 800 MHz with PCS, GSM900 with GSM1800 or GSM900 with UMTS2100. According to the company, most competing wideband diplexers only extend to 2170 MHz, while the FD9R6004 series can accommodate services up to 2200 MHz, making it ideal for S-UMTS/DVB-SH applications where the downlink extends to the 2110 to 2200 MHz envelope. Further these diplexers enable carriers to add new frequencies without having draw is below 50 nA. The receiver input sensitivity is as low as -112 dBm for ASK and -107 dBm for FSK signals, respectively. The MLX71122 combines flexibility with high levels of circuit complexity. It dramatically reduces system cost thanks to the internal IF filter and FSK/ASK demodulators. The receiver’s AFC feature can tolerate frequency uncertainties of the input signal. The extended operating range of -40 to +105 °C makes the receiver ideal for AMR and RF remote control applications in harsh environments. Other typical uses include automotive remote keyless entry (RKE), tire pressure monitoring systems (TPMS), security systems, home automation, garage door openers, wireless door bells, baby monitors and wireless headsets. www.mwee.com/210300568 to invest in additional cable runs, which saves on tower rental and installation expenses. Rated to IP67, the FD9R6004 diplexer series weighs only 1.4 kg and is only 0.43 L in volume. It is ideal for outdoor use in any climatic conditions, and features in-line long-neck connectors for easy connection and waterproofing, while its compact and lightweight construction makes installation straightforward, especially in crowded towertop environments. The high-performance peak power handling capability of the FD9R6004 series allows carriers to use multiple transmit frequencies at full power. Furthermore, integrated DC block/bypass versions (full band, low band and high-band) are available, enabling it to be used in association with towermount amplifiers (TMAs). www.mwee.com/210500151 Precision metal foil resistor delivers military grade in a 0603 package and improved load life stability Vishay Intertechnology has introduced its VSMP0603 ultra-high-precision Bulk Metal® Z-Foil (BMZF) wraparound surface-mount resistor. The device claims to be the industry’s ﬁrst in the 0603 chip size to offer a military-grade absolute TCR of ±0.2ppm/°C from -55 to +125 degrees Celsius, +25 degree Celsius reference, a tolerance of ±0.01 percent, and an almost immeasurable 1-ns rise time without ringing. While typical 0603 resistors offer a load-life stability of ≥0.1 percent through a 1000-hour workload, this new device features an improved load-life stability of ±0.005 percent at +70 degrees Celsius for 2000 hours at rated power. The VSMP0603 is built on the company’s “Z- Foil” technology, which provides a signiﬁcant reduction of the resistive component’s sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). Z-Foil improves stability by an order of magnitude compared to any other resistor technology, to guarantee a high degree of accuracy in ﬁxedresistor applications. www.mwee.com/210500157 Microwave Engineering Europe ● September 2008 ● www.mwee.com 040_MWEE.indd 40 5/09/08 11:12:28 http://www.mwee.com/210300568 http://www.mwee.com/210500151 http://www.mwee.com/210500157 http://www.mwee.com

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

Microwave Engineering Europe - September 2008 News Contents Comment Cover Feature: Uncovering Test and Measurement’s Role in Advancing LTE and Mobile WiMAX WiMax: WiMax and LTE Need to Address Issues of Backhaul, Cost and Efficiency for Successful Deployment WiMax: Manufacturing Communications Technology Products in India Test and Measurement Mobile Platforms Evolve to Meet Future Demands Products Calendar

Microwave Engineering Europe - September 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.