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Industry News

A 2.7 GHz RF/IF Gain and Phase Detector

A new gain/phase detector used to measure the gain ratio and phase difference between two signals
Analog Devices Inc.
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PRODUCT FEATURE A 2.7 GHz RF/IF Gain and Phase Detector Analog Devices Inc. Norwood, MA G ain and phase are fundamental properties of all radio systems. The need to measure these parameters is exemplified through the ubiquitous use of vector analyzers. The AD8302 gain/phase detector integrated circuit was developed...
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A New Approach to Wireless Propagation Prediction

The development of a new propagation and prediction software tool called Wireless InSite
Remcom Inc
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PRODUCT FEATURE A New Approach to Wireless Propagation Prediction Remcom Inc. State College, PA Fig. 1 Three-dimensional orthographic view of downtown Rosslyn, VA showing transmitter antenna locations and field strength along the receiver routes. A software tool has been developed that provides accurate, site-specific radio signal predictions for urban...
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Low Cost Antenna Measurement Systems

A series of user-friendly, accurate and cost-effective antenna pattern measurement systems
HVS Technologies Inc
One Comment
PRODUCT FEATURE Low Cost Antenna Measurement Systems HVS Technologies Inc. State College, PA Fig. 1 The new HVS antenna measurement system.  A new family of low cost systems for antenna pattern measurements has been developed. These systems, shown in Figure 1, come with complete hardware and user-friendly software for...
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CAD of a Compact Monopulse Comparator Network Using Planar Magic Tee Junctions for Airborne Slotted Array Antennas

Development and use of planar magic tee junctions for airborne slotted array applications
Dr. Anil Kumar Singh and Dr. S. Christopher
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TECHNICAL FEATURE CAD of a Compact Monopulse Comparator Network Using Planar Magic Tee Junctions for Airborne Slotted Array Antennas The operating principle and design of compact, non-standard, reduced height waveguide planar magic tee junctions are described. The distinguishing feature of these components is the placement of the difference port...
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Thermal Modeling of Heterojunction Bipolar Transistors with Pulsed I-V Measurements

An extraction procedure for thermal parameters of high power heterojunction bipolar transitors with pulsed I-V measurements
Hyun-Min Park, Kye-Ik Jeon, Songheol Hong
No Comments
TECHNICAL FEATURE Thermal Modeling of Heterojunction Bipolar Transistors with Pulsed I-V Measurements An extraction procedure for thermal parameters of high power heterojunction bipolar transistors (HBT) with pulsed I-V measurements is presented. The pulsed measurements become essential to model thermal effect and frequency dispersion of high frequency devices. The measurement...
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A Four-port Microwave Measurement System to Speed On-wafer Calibration and Test

Description of a new multiport calibration technique utilizing a four-port wafer-probe system
David K. Walker, Dylan F. Williams, Allen Padilla, Uwe Arz, Hartmut Grabinski
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TECHNICAL FEATURE A Four-port Microwave Measurement System to Speed On-wafer Calibration and Test A four-port measurement system comprising an inexpensive coaxial switch matrix and a comprehensive free software package extends the capabilities of a user's two-port automatic network analyzer and probe station to three- and four-port measurements. The software...
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Exploiting Filter Symmetry

The manifestation of physical and response symmetry in electric-wave filters
Randall W. Rhea
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TECHNICAL FEATURE Exploiting Filter Symmetry Randall W. Rhea Eagleware Corp. Norcross, GA S ymmetry is an element of beauty. Besides it's esthetic appeal, symmetry is practical. Symmetry has two important manifestations in electric-wave filters: symmetry with respect to element values mirrored about the input and output (physical symmetry) and...
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Nyquist Quadrature Frequency Shift Keying for Spectral Efficiency

In-depth discussion of NQFSK, a constant carrier output modulation format with excellent spectral containment
Frank Amoroso
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TECHNICAL FEATURE Nyquist Quadrature Frequency Shift Keying for Spectral Efficiency Frank Amoroso Santa Ana, CA T he selection of a data modulation scheme for radio transmission usually involves a trade among a number of parameters, including communications efficiency (bit error rate (BER) vs. signal-to-noise ratio), bandwidth efficiency and factors...
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A Low Cost Planar Filter for 60 GHz Applications

A low-cost, lightweight printed planar filter based on a new equivalent circuit structure
Yoshihisa Amano, Atsushi Yamada, Eiji Suematsu, Hiroya Sato
No Comments
TECHNICAL FEATURE A Low Cost Planar Filter for 60 GHz Applications A low cost printed planar filter on alumina ceramic substrate was developed at 60 GHz. This filter is advantageous in cost, size, weight and connectivity to MMICs. It is especially suitable for millimeter-wave module integration, where MMICs and...
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A Band For All Reasons

The use of software-defined radios to improve military communications
Michael Puttre
No Comments
Special Report A Band For All Reasons Software radios promise to radically redefine battlefield communications. This Special Report is reprinted from the January 2001 issue of our sister publication, the Journal of Electronic Defense. Although it describes military applications, much of the material is common to emerging commercial radios....
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