RF & Microwave Industry News

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The Commercial Market US Cellular Subscribers to Generate 500 Billion Minutes of Use A new study published by Strategy Analytics within its Mobile Communications Service - North America information service forecasts that wireless usage minutes will grow at a compound annual rate of 35 percent between 1998 and 2003...

The Book End Quasioptical Systems Paul F. Goldsmith IEEE Press 412 pages; $99.95 There has been considerable growth in the application of quasioptics to system design at millimeter and submillimeter wavelengths that has resulted in significant use of quasioptics in radar, remote sensing and materials measurement systems. Thus, the...

A Plastic Package for Custom Circuits KDI/triangle Corp. Whippany, NJ Packaging has long been a key to reducing costs and speeding time to market for RF and microwave designs. Both commercial and military applications now call for small and lightweight high performance packages that do not add excessive cost....

A Digitally Compensated Phase Shifter COMSAT RSI, Anghel Laboratories Rockaway, NJ Developing a phase shifter that produces a constant or flat phase response with respect to frequency is difficult. Networks that exhibit this type of behavior are narrowband and must be optimized for each specific frequency and desired phase...

Multiband Linear Power Amplifiers ITS Electronics Inc. Concord, Ontario, Canada A family of wideband linear power amplifiers have been developed to service cellular/PCS applications as well as electronic warfare (EW)/electronic countermeasures (ECM), local multipoint distribution service and active load pull applications. The amplifier models cover four basic frequency ranges...

An Affordable Harmonic Load Pull Setup Focus Microwaves Inc. Ville St. Laurent, Quebec, Canada Since the early days of semiconductor amplifier design when bipolar transistors were used, it has been common knowledge that short-circuiting the second and third harmonic frequencies with the correct phase at the output of a...

A Flexible Upconverter/Signal Generator to Support Communication and Radar Systems Communication Solutions Inc. Baltimore, MD As modulation formats become more complex and communication and radar systems push the edge of technology, timely and cost-effective maintenance of these systems requires sophisticated test equipment. Wider bandwidth, AM and FM modulation, and...

Third-generation Wireless Test Equipment Requirements Rob Van Brunt Telecom Analysis Systems Inc. Eatontown, NJ Although the technology rollout is still several years away, development of third-generation (3G) wireless systems is well under way. During this critical development phase, manufacturers are making strategic decisions on the most appropriate modulation, protocol...

Current Techniques for Tuning Dielectric Resonators Electronic tuning of dielectric resonators over a relatively wide range while also preserving their characteristics is highly desirable, especially for use in nonaccessable systems such as airborne or spaceborne systems or in areas of high sophistication such as cellular radio systems. This article...

The Age of the Precision Oscillator: The Role of the TCXO and DCXO Bill Jennewein M-tron Industries Inc. Yankton, SD The need for quality, high precision timing devices is increasing daily. The heart of all communications is linked directly to a stable and dependable source of frequency control. Computer...