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In the design of high frequency power amplifiers, the goal is to achieve the power gain and output power at the desired frequency in order to achieve high PAE. Large-signal S-parameters of power devices are normally not provided by the manufacturer. One of the methods to characterize the device...

Modern mobile communication systems use band-limited linear modulation schemes, such as multi-level quadrature amplitude modulation (QAM) and quadrature phase shift keying (QPSK), which have high peak-to-average power ratio characteristics. For these systems, linear power amplifiers are needed to prevent adjacent channel interference. A power amplifier operated sufficiently below the...

Bonding Films The CuClad 6250 and 6700 are low melting point bonding films that have been developed for lamination of stripline or other multilayer circuits fabricated from CuClad or other company PTFE-based laminates. Dielectric constants of 6250 and 6700 bonding films fall in the midrange of CuClad® and DiClad®...

Industry News Tore N. Anderson Tore N. Anderson died suddenly on April 14, 2004. He was 83 years old. He was one of the pioneers of the microwave industry and was widely recognized for his work in waveguide structures and antennas. He held a number of patents in the...

Waveguide, Coaxial and Dual Switches This product catalog features the company’s waveguide, coaxial and dual switches. The catalog details several microwave switches and provides an outline drawing, electrical specifications, mechanical specifications and environmental specifications of each. The catalog highlights the most common devices. Other configurations are available upon request....

Lockheed Martin has been selected to develop the Joint Common Missile (JCM) system, the next generation air-to-ground missile that will be carried on the US Armed Forces rotary- and fixed-wing platforms. The contract is worth approximately $5 B over the life of the program. Lockheed Martin received an initial...

Remec Inc. announced it has received an initial $8.9 M production contract from Raytheon Missile Systems for the Tube-launched, Optically-tracked, Wire-guided (TOW) missile second-generation upgrade program. This contract is a result of Raytheon’s recent demonstrated success to prove feasibility to add expanded capability to the TOW weapon system. With...

Demand for smaller, more densely packed and more powerful RF and microwave components is increasingly driving developments in a wide variety of areas, from chip packages to hand-held communication devices to phased-array antennas. In turn, the components and structures are experiencing increased levels of coupling between the electromagnetic fields...

Drop-in Replacements This drop-in replacement product family is designed for 50 V MRF150/151 and 28 V MRF141 type VDMOS general-purpose RF products. Demand for these products remains high while the number of suppliers has been reduced by recent industry consolidations. These products are ruggedized to enhance overall performance under...

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,...