RF & Microwave Industry News

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A Three-channel Vector Modulator with Reference Channel Merrimac Industries Inc. West Caldwell, NJ A new and unique packaging technology has been introduced for commercial and military microwave components and subsystems. Multi-Mix™ packaging methodology is a unique process based on fluoropolymer composite substrates for application to microwave multilayer ICs and...

Integrated Software for Electromagnetic Simulation Eagleware Corp. Stone Mountain, GA In the past, most electromagnetic (EM) simulation software has been slow, difficult to use and expensive. =empower= Plus EM software addresses these issues by providing fast, accurate EM simulation. This simulation is completely integrated with traditional circuit simulation, allowing...

A Portable 9 kHz to 2.7 GHz SpectrumAnalyzer IFR Americas Inc. Wichita, KS A new lightweight, portable spectrum analyzer has been developed that covers the 9 kHz to 2.7 GHz frequency spectrum. The model 2398 spectrum analyzer is a fully synthesized instrument that combines ease of use and broad...

SAW IF filters in Mobile Communications Networks Sunder Gopani Sawtek Inc. Orlando, FL As mobile communications networks are making headway in their global expansion, two digital systems are emerging as standards: the Global System for Mobile communications (GSM) and code-division multiple access (CDMA). GSM is implemented predominantly in Europe...

Coupling Behavior between Transmission Lines with Meshed Ground Planes in LTCC-MCMs Multilayer ceramic modules for high speed digital applications use meshed planes between the signal layers for shielding and power supply. Both wave impedances of the signal lines and coupling behavior between different signal layers are influenced by the...

A 1.9 GHz Adaptive Feedforward Power Amplifier A relatively low power feedforward amplifier for 1.9 GHz has been developed to demonstrate the feasibility of the adaptive feedforward linearization technique. The saturated two-tone output power of this amplifier is approximately 4 W. The measured third-order intermodulation is -18 dBc before...

Accurate and Efficient Modeling of Meander-line Polarizers A meander-line polarizer is a passive broadband device used to convert the polarization properties of a wave. When designed properly, the polarizer permits a linear polarized antenna to propagate circular polarization without any significant variations in the pattern performance. Modeling of the...

A Microwave Analog Frequency Divider Matjaz Vidmar Nova Gorica, Slovenia Many analog frequency divider circuits were invented during the age of the vacuum tube. Some of these circuits even survived the germanium transistor age, but most were forgotten following the availability of inexpensive monolithic digital ICs such as flip-flops...

Useful Filtering Techniques to Save Scarce Spectrum in Communications Systems Helen Wright Hewlett-Packard Co., Microwave Instruments Division Santa Rosa, CA Most communications systems fall into one of three categories: those that are bandwidth efficient, power efficient or cost efficient. Bandwidth efficiency describes the ability of a modulation scheme to...

Around the Circuit INDUSTRY NEWS Plainview, NY-based Aeroflex Inc. has acquired 90 percent of the common stock of France-based Europtest S.A. for approximately $1.1 M. Aeroflex will purchase the remaining 10 percent of the company over a three-year period at prices to be determined based upon net sales of...