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The growing demand for mobile communications, mainly telephony, implies the need for better performance of RF transceiver architectures. A fundamental element in these front-ends is a voltage-controlled oscillator (VCO), the performance of which is a determining factor related to system limitations. Fully integrated VCOs usually suffer from poor phase...

The simplest quarter-wavelength, multi-port power divider, known as a Wilkinson divider, 1-2 provides a match at all ports, low loss, in-phase power splitting and high isolation between output ports. Historically, this device was reported earlier. 3-7 It was also described 5 together with the so-called Gysel-type combiner, 8 based...

ASK HARLAN YOUR RF & MICROWAVE TECH Q&A RESOURCE You may know Harlan Howe from his twelve years as publisher and editor of Microwave Journal ®, or from his 34 years as a Microwave design engineer and engineering manager, or from his service as an IEEE fellow and past...

ASK HARLAN YOUR RF & MICROWAVE TECH Q&A RESOURCE You may know Harlan Howe from his twelve years as publisher and editor of Microwave Journal ®, or from his 34 years as a Microwave design engineer and engineering manager, or from his service as an IEEE fellow and past...

COMPONENTS GaAs MMIC Switch The model SWM-6000-1DTU option 011 is an absorptive/non-reflective SPST switch that operates from 10 MHz to 6 GHz (other frequencies available). Insertion loss is 100 dB at 10 MHz and > 30 dB at 6 GHz. SWR is 1.5. Speed is American Microwave Corp., Frederick,...

The IEEE P802.15.3 standard for high rate Wireless Personal Area Networks (WPAN), designed specifically for consumer electronic and portable multimedia devices, has completed IEEE 802.15 working group and sponsor ballot approval. One approval step remains within the consensus process followed by the Institute of Electrical and Electronic Engineers (IEEE)...

A recently completed study by In-Stat/MDR finds that wireless data adoption is growing in the business environment - just not with the "hockey-stick" growth curve that continually has been projected. The high tech market research firm's study, which was based on more than 1500 surveys with IT decision makers...

With the absence of a currently available and standardized wireless technology that offers robust multimedia transport of multiple digital streams, Ultra-wideband (UWB) promises to be the technology that delivers the bandwidth and QoS that many consumer electronics companies have been looking for. In-Stat/MDR reports that, having seen the gap...

COMPONENTS Solid-state Switch The model SWN-218-2DT options 0518, HPR2W is a high power (2 W) absorptive SP2T switch, that works from 500 MHz to 18 GHz (10 MHz to 18 GHz optional). Insertion loss is 95 dB at 500 MHz and > 80 dB at 18 GHz. Amplitude is...

Within the framework of the @LIS programme, the European Commission has signed a €3.8 M contract with the European Telecommunications Standards Institute (ETSI) for the promotion of cooperation between Europe and Latin America in the standardisation field. The main objectives being to achieve economies of scale and interoperability between...