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Dive into the research topics where Bary Robert Bertiger is active.

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international reliability physics symposium | 1980

A Latent Failure Mechanism for Surface Acoustic Wave Components Utilizing Lithium Niobate

Donald Eugene Allen; Bary Robert Bertiger; Wayne Daily

A latent failure mechanism for surface acoustic wave components which utilize lithium niobate as the piezoelectric has been, identified. This failure mechanism involves the growth of aluminum oxide on the thin film aluminum metal which constitutes the interdigitated electrical/mechanical transducer structure. This failure mechanism has been successfully eliminated in high-reliability components by making certain that a necessary condition for the growth of the oxide does not exist. The necessary condition is the existence of a dc electric field within the transducer structure. The exact conditions necessary for the initiation of the oxide growth have not, as yet, been determined. It is known that electric field values of the order of 104 volts per centimeter with ambient temperature of 125°C for 168 hours can cause the growth. The effect of the growth is to reduce the effective electroacoustical coupling factor which results in the component exhibiting added insertion loss and a skewing of pass band RF characteristics as the growth progresses.


Archive | 1989

Satellite cellular telephone and data communication system

Bary Robert Bertiger; Raymond Joseph Leopold; Kenneth Maynard Peterson


Archive | 1990

Method of predicting cell-to-cell hand-offs for a satellite cellular communications system

Bary Robert Bertiger; Raymond Joseph Leopold; Kenneth Maynard Peterson


Archive | 1996

Method and apparatus for providing duplex communication service in geographical areas where conventional services are obstructed

Bary Robert Bertiger; David Warren Corman; Dean Lawrence Cook; Kristine Patricia Maine; Keith Warble


Archive | 1990

Telemetry, tracking and control for satellite cellular communication systems

Bary Robert Bertiger; Raymond Joseph Leopold; Kenneth Maynard Peterson


Archive | 1985

Wave soldering in a reducing atmosphere

Bary Robert Bertiger


Archive | 1992

Power management system for a worldwide multiple satellite communications system

Bary Robert Bertiger; Raymond Joseph Leopold; Kenneth Maynard Peterson


Archive | 1996

Method and apparatus for simplex delivery of signals to obstructed geographical areas

David Warren Corman; Bary Robert Bertiger; Dean Lawrence Cook; Norbert Kleiner; Kristine Patricia Maine


Archive | 1990

Multiple beam deployable space antenna system

Bary Robert Bertiger; Raymond Joseph Leopold; Kenneth Maynard Peterson


Archive | 1996

Method and apparatus for using the sidelobe of a long range antenna for a short range communication link

Raymond Joseph Leopold; Keith Andrew Olds; Bary Robert Bertiger

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