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NEWS FROM WASHINGTON Milstar II Launched The Milstar II US Air Force military communications satellite built by Lockheed Martin Space Systems Co. at facilities in Sunnyvale, CA and Denver, CO, was launched from Cape Canaveral Air Station, FL, in late February. Milstar II is the Defense Department's most technologically...

WORKSHOPS & COURSES Emerging IT Technologies: An Enterprise-focused Vision * Topics: ERP and supply chain management, data warehouse and data mining, decision support systems and artificial intelligence, e-commerce, extranets/intranets, events calendaring, work flow, program management and risk management. Fee: $1495. * Site: Pasadena, CA * Dates: May 8­11, 2001...

PRODUCT FEATURE A Linear LDMOS Amplifier for 3GPP Applications Philips Semiconductor Foxboro, MA W ith the introduction of digital modulation formats and the trend towards multi-carrier amplifiers, base station power amplifiers require the use of transistors with high peak power capability. The amplifier is required to meet stringent linearity...

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...

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...

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...

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...

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...

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...

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...