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Industry News

High Isolation Switches with Integral Drivers

This month's cover features a low cost, GaAs, high isolation SPDT switch with an integrated driver that reduces the leakage of unwanted signals
September 1, 1998
High Isolation Switches with Integral Drivers Mini-Circuits Brooklyn, NY Solid-state switches are used extensively for routing or selecting RF and microwave signals. If the isolation between the selected and unselected ports is not high, leakage of unwanted signals could degrade the carrier-to-interference ratio. Several switches may have to be...
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60 and 120 W, 2 GHz LDMOS FETs

Two new laterally diffused metal-oxide semiconductor (LDMOS) FETs developed for code-division/time-division multiple access applications from 1.8 to 2 GHz
September 1, 1998
60 and 120 W, 2 GHz LDMOS FETs Ericsson Components, RF Power Products Morgan Hill, CA The dramatic increase in cellular traffic has necessitated the use of spread spectrum techniques such as time-division multiple access (TDMA) and code-division multiple access (CDMA). These modulation methods have significantly tightened the linearity...
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A High Performance, Economical RF/Microwave Substrate

A polytetraflouroethylene-based RF/microwave substrate for high frequency applications
September 1, 1998
A High Performance, Economical RF/Microwave Substrate Taconic, Advanced Dielectric Division Petersburgh, NY During the past decade, the wireless industry has evolved from a predominantly military-driven market to a cost-conscious, consumer-driven commercial market. At the same time, wireless applications are moving up in the frequency spectrum. For example, personal communications...
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High Reliability Coaxial Microwave Switches

The new Radiall Modular System for Electromechanical Switches (RAMSES)
September 1, 1998
High Reliability Coaxial Microwave Switches Radiall Inc. Paris, France and Stratford, CT, USA An innovative new system has been designed for constructing electromechanical coaxial RF switches with increased long-term reliability. The Radiall Modular System for Electromechanical Switches (RAMSES) is a patented concept that enables microwave coaxial switches to be...
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A Digital Quadrature IF Mixer

A digital quadrature IF mixer that provides a compact and efficient implementation for the front-end converter in microwave signal processing
September 1, 1998
A Digital Quadrature IF Mixer Anaren Microwave Inc. East Syracuse, NY A digital quadrature IF mixer (DQIFM) combines two proven technologies to produce a single RF-to-digital solution for front-end conversion in microwave signal processing applications. The device incorporates broadband RF stripline technology with high speed digital conversion, providing an...
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Trends in Mobile Telephony Services Tariffing

Expected changes in mobile telephony service tariff structures, including the disappearance of differences in tariffs between countries and among competing operators
September 1, 1998
Trends in Mobile Telephony Services Tariffing Stefan Zehle Prodata Partners Ltd., London, UK Mobile telephony services tariffs and tariff structures are likely to change substantially over the next few years. The differences in mobile tariffs between countries are likely to disappear and tariffs offered by competing operators are likely...
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The Wireless Decade: A European Survey

A look at Europe's cellular service providers who, despite booming markets, are entangled in cut-throat battles to win and maintain subscribers
September 1, 1998
The Wireless Decade: A European Survey Lucy Berridge, Stephen Stones, Peter Kingsland, Tania Harvey and Ross Parsons CIT Publications, Exeter, UK There is no doubt that European mobile communications markets are booming as never before. As ever, strong regional and national differences exist within this cross-European trend. Last year,...
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The Role of Microwave Technologies in the Wireless Revolution

Microwave technologies that are providing a reliable, fast-to-deploy, cost-effective, flexible transmission network for mobile operators as part of the current wireless boom
September 1, 1998
The Role of Microwave Technologies in the Wireless Revolution Manuel del Castillo and Henry Valenzuela Andrew Corp., Orland Park, IL There is no doubt that we are in the middle of a wireless revolution that has been initiated by current digital mobile standards. This wireless boom has accelerated the...
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mm-wave Microelectronics Manufacturing

Achieving successful commercial mm-wave maunfacture by implementing products rapidly and maintaining low costs as well as a stringent design-for-manufacture discipline
September 1, 1998
mm-wave Microelectronics Manufacturing Kevin Danehy and Mark Wolf M/A-COM, a division of AMP Inc. Lowell, MA The question as to whether or not the telecommunications industry will fully utilize the promise of mm-wave technology is still highly debated. However, the development and interest in commercial mm-wave products have skyrocketed....
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Free-space vs. One-horn Interferometer Techniques for Radar Absorber Measurements

A comparison of the reflection coefficient measurements of radar-absorbing materials in free space and using the one-horn interferometer technique for different test samples
September 1, 1998
Free-space vs. One-horn Interferometer Techniques for Radar Absorber Measurements The reflection coefficient measurements of radar-absorbing materials (RAM) in free space (FS) and using the one-horn interferometer (OHI) technique are compared for different test samples. It is observed that the problems in the measurement of reflection coefficients using the OHI...
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