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Industry News

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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The Importance of Sweep Rate in DC IV Measurements

The importance of taking due care in setting up IV measurement sweep rate is explored for the case of a GaAs MESFET and a silicon MOSFET. A numerical metric, called the normalized difference unit (NDU), is shown to be useful in determining appropriate ...
The DC IV characterization of a device is important in predicting RF operation. DC IV results predict the quiescent bias and low frequency IV characteristics for a device, while in some cases they can be corrected to represent RF characteristics at a given quiescent bias point. 1,2 In addition,...
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Transient Simulations at RF Frequencies

Harmonic balance simulation is a fast and effective means for accurately predicting the steady-state performance of RF, microwave and millimeter-wave circuits. Transient simulation is also important for predicting the time-domain behavior of many of these circuits, especially when they include oscillators, frequency dividers and mixed-signal functions. Several SPICE-based circuit...
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US Air Force Research Laboratory Exercises Option for X-band Thin Radar Aperture

Raytheon Co.’s option to proceed with its X-band thin radar aperture (XTRA) contract has been exercised, allowing the company to produce the next generation radar antenna technology for the J-UCAS (Joint Unmanned Air Combat System) that could revolutionize manned and unmanned combat systems. The AFRL (Air Force Research Laboratory)...
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Northrop Grumman Readies Commercial Aircraft Anti-missile System

Northrop Grumman Corp. announced it will install and flight test its commercial aircraft protection system on a Boeing 747 and MD-11 this year. The system, called Guardian, represents the successful transfer of proven military directional infrared countermeasures (DIRCM) technology to protect commercial aircraft from attack by ground-based, shoulder-fired missiles....
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Raytheon's Affordable Ground Based Radar Passes Milestone

Raytheon Co.’s Affordable Ground Based Radar (AGBR) passed a critical milestone during a recent United States Marine Corps test in support of the goal to field future radar sensors configured in a tactical and highly mobile design for the Marine Expeditionary Forces worldwide. In line with the schedule laid...
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Lockheed Martin Conducts Fourth Succesful Test of Guided MLRS

Lockheed Martin conducted the fourth flight test of a Guided Multiple Launch Rocket System (GMLRS) Unitary rocket at White Sands Missile Range, NM. Test objectives included demonstrating the GMLRS Unitary rocket in the delay mode, the improved guidance software, and the warhead and fuzing mechanism under cold weather conditions....
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Filtronic and RFMD Broker Strategic Supplier Relationship

Filtronic plc, a global designer and manufacturer of customised microwave electronic subsystems and components for the wireless telecommunications and defence industries, and RF Micro Devices Inc. (RFMD), have signed a supply agreement for the manufacture of high volume pHEMT GaAs products on the Filtronic 6 inch processing facility based...
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Alliance Extends Semiconductor R&D Activities

The Crolles2 Alliance partners, Freescale Semiconductor, Philips and STMicroelectronics, have extended the scope of their joint semiconductor research and development activities to include R&D related to wafer testing and packaging, in addition to the original development of sub 100 nm CMOS process technologies. This agreement reflects the special needs...
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