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Low Cost, Ultra-high Isolation SPDT Switches

This month's cover features a DC to 5 GHz high isolation switch that can be used with a personal computer to produce a low cost, high speed, automated test station
November 1, 1999
Mini-Circuits, Brooklyn, N.Y.
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Low Cost, Ultra-high Isolation SPDT Switches Mini-Circuits Brooklyn, NY Wideband test instrumentation often requires signal routing. This function is usually accomplished with mechanical switches, which are expensive and slow. When isolation requirements are not high, electronic switches may be utilized. However, most high isolation electronic switches available in today's...
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Parametrics and Optimization Using Ansoft HFSS

A powerful new feature of the company's high frequency structure simulator (HFSS) that provides parametric and optimization capabilities for three-dimensional RF and microwave design problems
November 1, 1999
Ansoft Corp.
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Parametrics and Optimization Using Ansoft HFSS Ansoft Corp. Pittsburgh, PA The high frequency structure simulator (HFSS) is widely recognized as the tool that brought the power of the finite element method to three-dimensional (3-D) RF and microwave design. Finite element analysis allows complicated 3-D structures such as transitions, filters,...
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Thermal Overdrive Firmware to Improve Thermal Test and Conditioning Throughput

A new firmware feature for the company's controllers that is designed to achieve the setpoint temperature inside a device under test either as quickly as possible or at a controlled ramp rate
November 1, 1999
Sigma Systems Corp.
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Thermal Overdrive Firmware to Improve Thermal Test and Conditioning Throughput Sigma Systems Corp. San Diego, CA Thermal testing and conditioning involve moving heat. Moving heat into or out of a device under test (DUT) takes time. That time affects production throughput and, ultimately, production cost. However, there are methods...
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Modular Design of Power Amplifiers

A modular power amplifier concept using the AdrenaLine splitter/combiner that permits amplifier designers to concentrate on higher level design tasks such as linearization techniques
November 1, 1999
Anaren Microwave Inc.
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Modular Design of Power Amplifiers Anaren Microwave Inc. E. Syracuse, NY Power amplifier designers today face increased peak power-handling requirements due to the new digital modulation forms used in wideband CDMA (W-CDMA) systems. At the same time, the power amplifiers must meet stricter linearity requirements and the available RF/microwave...
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Nonlinear Waveform Prediction in Fast Microwave Circuits

A time domain, transient analysis simulator that allows the prediction of waveforms in fast, nonlinear circuits in which accurate S-parameter data can be imported and used
November 1, 1999
Optotek Ltd.
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Nonlinear Waveform Prediction in Fast Microwave Circuits Optotek Ltd. Kanata, Ontario, Canada MMICAD WAVEFORM,™ a new time domain, transient analysis simulator, allows the prediction of waveforms in strongly nonlinear circuits in which accurate S-parameter data can be imported and used in the simulation. The new time domain software is...
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Circularly Polarized, Aperture-coupled Patch Antennas for a 2.4 GHz RFID System

The design of aperture-coupled patch antennas for an active read/write microwave tagging system using a circular polarization modulation
November 1, 1999
Marcel Kossel, Hansruedi Benedickter, Werner Bachtold, Roland King and Jan Hansen
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Circularly Polarized, Aperture-coupled Patch Antennas for a 2.4 GHz RFID System Marcel Kossel, Hansruedi Benedickter and Werner Bächtold Swiss Federal Institute of Technology (ETH), Zurich Laboratory for Electromagnetic Fields and Microwave Electronics Zurich, Switzerland Roland Küng University of Applied Sciences Rapperswil (HSR) Rapperswil, Switzerland Jan Hansen Swiss Federal Institute...
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Intermodulation Characteristics of Ferrite-based Directional Couplers

Minimizing the efects of intermodulation and cross-modulation in ferrite-based passive components through proper selection of ferrite core materials with regard to permeability and size
November 1, 1999
Shane Collins and Kieran Flynn
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Technical Feature Intermodulation Characteristics of Ferrite-based Directional Couplers Shane Collins and Kieran Flynn Please click here to view the pdf file of the Technical Feature...
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