RF & Microwave Industry News

A Vector Signal Generator for Production Applications

Recognition that the key requirements of test equipment used in an automated production environment are high throughput and reproducibility has led to the development of the R&S SMATE 200A vector signal generator. Designed as an optimum solution, this instrument features short setting times for frequency and level changes plus...
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Nonlinear Diode Models for Enhanced Simulation Accuracy

A library of robust models featuring substrate scalability and temperature dependence is now available for surface-mount diodes. The Modelithics Nonlinear Diode (NLD™) Library contains a compilation of measurement validated nonlinear diode models developed from I-V, C-V, small- and large-signal S-parameter characterization data. Over-temperature testing, combined with Modelithics’ patent-pending substrate-scalability...
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A CAD Algorithm for RF/Microwave Interconnect Modeling

This article presents a numerical technique (CAD) to model and analyse interconnects encountered in the design of high speed/high frequency analog RF/microwave circuits with mixed, lumped and distributed elements to be implemented on-chip. In this meth...
Because of the rapid growth in density and complexity of modern integrated circuit interconnects, modeling has been a requirement in circuit design and simulations. On-chip interconnects have achieved a dominant role, especially in determining the performance of RF and monolitic microwave integrated circuits (MMIC). In the last two decades,...
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A CAD-oriented Approach to Design of Load Impedance and Input Matching in Active Transmitting Antennas

This article discusses a general computer-aided design (CAD) approach to obtain the optimal fundamental load impedance and design the input matching circuits for an active integrated antenna of the transmitting type. A case study of a design for 1.6 GH...
An active integrated antenna (AIA) may be defined as a system in which an active device, usually a transistor, is closely integrated within an antenna, using a minimum of intervening circuitry. In recent years, AIAs have been considered a useful approach for improving performance and reducing size in front-end...
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De-embedding Using a Vector Network Analyzer Including Calibration and Measurement Techniques

The inclusion of adapters and test fixtures in a measurement setup is often necessary even if the consequence is less accuracy. De-embedding the device characteristics has been traditionally the most effective method of minimizing the negative effects. However, the process of de-embedding has been a laborious, expensive procedure restricted...
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