Industry News

An Ultradynamic Range GaAs Amplifier

A new IC amplifier that extends the linear efficiency advantages of the company's existing device to higher power levels
An Ultradynamic Range GaAs Amplifier Watkins-Johnson Co. Palo Alto, CA The model AH11 GaAs amplifier has been introduced to supplement the company’s line of linear GaAs components. Operating from a +5 V DC supply in a push-pull configuration, the new IC amplifier extends the linear efficiency advantages of the...
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LDMOS Transistors for FM Broadband Applications

Laterally diffused metal oxide semiconductor (LDMOS) technology as a viable solution for frequencies covering the high HF through high UHF bands
LDMOS Transistors for FM Broadband Applications STMicroelectronics Inc. Montgomeryville, PA High efficiency and high gain amplifiers for FM transmitters are possible today with laterally diffused metal oxide semiconductor (LDMOS) technology. Presently, LDMOS RF power transistors are the proven mainstay in the high volume cellular base station power amplifier business,...
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A GPS Module for CDMA and UMTS Synchronization

A new card-level Global Posistioning System (GPS) receiver module that provides synchronization for CDMA and Universal Mobile Telecommunications System (UMTS) mobile networks using the GPS signal and a high performance oven-controlled crystal oscillator
A GPS Module for CDMA and UMTS Synchronization Oscilloquartz SA Neuchatel, Switzerland Without precise timing, today’s new communications signals can lose data in their translation, particularly in the areas of light-speed data and broadband systems. Due to the emerging standards in mobile telecommunications and digital broadcasting, the quality of...
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Coupled Triplets

A look at the trend toward using coupling between nonadjacent resonators to form finite attenuation peaks
Coupled Triplets Albert J. Klappenberger and William B. Lurie ALK Engineering Salisbury, MD As the state of the art in L-C filter design realization moves forward to satisfy the changing demands of today’s requirements, it appears that some of the more sophisticated techniques are giving way to older, less...
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Integral Resistors in High Frequency Printed Wiring Boards

Integral resistors in the form of planar resistor technology in printed wiring boards that have become a tool of the circuit designer for addressing increasingly complex packaging demands
Integral Resistors in High Frequency Printed Wiring Boards Bruce P. Mahler Ohmega Technologies Inc. Culver City, CA The growing need to eliminate discrete resistors is driven by design trends toward faster speeds, shorter trace lengths and smaller boards with higher component densities. Printed wiring boards (PWB) have become complex...
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RF Receiver Requirements for 3G W-CDMA Mobile Equipment

Detailed specifications for a wideband CDMA (W-CDMA) receiver derived in terms recognizable by the RF designer
Technical Feature RF Receiver Requirements for 3G W-CDMA Mobile Equipment O.K. Jensen, T.E. Kolding, C.R. Iversen, S. Laursen, R.V. Reynisson, J.H. Mikkelsen, E. Pedersen, M.B. Jenner and T. Larsen Please click here to view the pdf file of the Technical Feature...
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