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Fractional-N synthesizers are highly desirable in communication systems because of their high frequency resolution output. This resolution is made possible by dithering the divide value using the output of a sigma-delta modulator. A typical sigma-delta fractional-N frequency synthesizer is shown in Figure 1 . The tri-state phase frequency detector...

Load-pull testing of power transistors usually employs wideband electromechanical tuners. Harmonic signal components, generated by a nonlinear device under test (DUT), must be terminated with known impedances in order to generate a meaningful set of data. This is not possible if a harmonic load-pull set-up is not available, in...

NEW WAVES: TEST, MEASUREMENT AND CAD EM-based Componen and Circuit Design Software This version 6.2 of LINMIC is a microwave/ RF IC design suite that has revised the active device modeling for ease of use and for parameter extraction including detailed control of model quality. Aside of lumped device...

Industry News PCTEL Inc. announced that it has completed the acquisition of MAXRAD Inc. , a manufacturer of wireless communications antennas for broadband wireless, in-building wireless and land mobile radio applications. PCTEL acquired all of the shares of MAXRAD, a privately held company, for $20 M. MAXRAD generated approximately...

Ultra-precision Service This company’s Web site offers a complete ultra-precision service for grinding, lapping, polishing, diamond sawing, laser machining and sizing a wide variety of metals (ferrous and non-ferrous). The company also offers carbide, ceramic, sapphire and other materials for industrial and scientific applications in the telecommunications, semiconductor, communications,...

The US Missile Defense Agency announced the award of an eight-year contract for the design, development and build of the kinetic energy interceptor (KEI) missile defense system to a Northrop Grumman and Raytheon team, supported by Rockwell Collins. The KEI system is intended to provide the US with the...

The US Air Force awarded Lockheed Martin one of two industry contracts valued at approximately $20 M each to enter the next development phase of an advanced Global Positioning System, to be known as GPS III. The present awards are for the Phase A element of the program during...

The US Air Force Space and Missile Command has awarded Northrop Grumman Mission System sector a contract to define the requirements needed to build a communication network for military, intelligence and space agencies. The Transformational Communications MILSATCOM (TCM) network, which will be based on a single overarching communications architecture,...

The US Air Force has exercised the Lot 5 production contract option with Raytheon Co. to produce AGM-65H/K Maverik missile guidance and control sections. The $49.7 M option includes more than 1000 tactical guidance and control sections, 35 training guidance and control sections, and pilot and maintenance training and...

In the scope of the European Union MAESTRO Research and Development project (Mobile Applications and sErvices based on Satellite and Terrestrial inteRwOrking), Alcatel Space will coordinate an international consortium of 20 partners addressing the whole mobile multimedia value chain. This partnership will enable the development and implementation of the...