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The Commercial Market Ameritech Launches Digital Cellular Service in Chicago Ameritech has launched its ClearPath digital code-division multiple access (CDMA) cellular service in Chicago with more than 13,000 of its analog system customers subscribing to the new service. Unlike digital personal communications service (PCS) carriers who offer handsets at...

Boundless Europe: The Wireless Revolution Bhawani Shankar European Microwave Journal Staff Competition is compelling Europe's operators to lean on wireless systems as an alternative to the more expensive wireline networks. Over the past several weeks, the total headcount of subscribers to the Global System for Mobiles (GSM) networks surpassed...

New Tools in Frequency Planning Joachim Samuelsson ComOpt AB Helsingborg, Sweden Europe's network planners are resorting to advanced frequency planning aids to speed network deployment and increase spectral efficiency, and mobile network operators face a number of technical and management challenges in this frequency planning process. These challenges apply...

Observations of a Dual-use Road Warrior Jim Fallon M/A-Com Inc., an AMP company Lowell, MA For those of us who have been involved for a long time in the RF, microwave and mm-wave world, the past 10 years have brought about some fundamental and unprecedented changes in all aspects...

Substrate Attach Design Guidelines for Bonding Alumina to Aluminum In an effort to achieve higher density microelectronic packages, various ceramic substrate packaging techniques are being introduced. For instance, one of these techniques eliminates the need for a carrier so that a substrate is bonded directly to a housing. The...

A mm-wave, Wireless Local Area Network for Use inside an Aircraft Erwin A. Ulbrich, Jr. and Dan Bryden McDonnell Douglas Aerospace, Transport Aircraft Division Long Beach, CA Existing aircraft contain many transmitters and receivers in their avionics suites. It is a common experience now for aircraft operators to limit...

The True Cost of Hermetic Seals for Aluminum Housings Jack Pollock Special Hermetic Products Inc. Wilton, NH Hermetic seal reliability has been a major concern in the microwave industry for the past 35 years or more. While sealing problems have occurred with various materials and processes, none have approached...

155 GHz MMIC LNAs with 12 dB Gain Fabricated Using a High Yield InP HEMT MMIC Process A highly robust, high performance 0.1 mm passivated InGaAs/InAlAs/InP high electron mobility transistor (InP HEMT) MMIC process with frequency capability to 200 GHz and beyond has been developed. This process has demonstrated...

Multipath Blanking in Shipboard IFM Receivers William B. Sullivan Wide Band Systems Inc. Rockaway, NJ Shipboard electronic support measure/RF collection systems are particularly susceptible to errors due to multipath effects where the receiver observes not only the direct path signal from the emitter, but also signals reflected from the...

AROUND THE CIRCUIT INDUSTRY NEWS Custom component and subsystem manufacturer Advanced Frequency Products , Andover, MA, has been formed following the acquisition of the Digital Radio Transceiver Business from Alpha Industries , Woburn, MA. In an effort to conduct a smooth transition and to keep production and customer service...