The Boeing Company

Eldec Corporation

Gregory A Kromholtz

Alfred Euinam Lee

Brian Kenneth Kormanyos

Bernard J Burreson

Jeremy Daniel Popp

Jon F Beutler

Jeffrey J Green

Delbert F Flagg, Jr

Walter A Van Schalkwijk

Timothy T Lee

An antenna and power amplifier element assembly may include an antenna assembly and a quasi-optic power amplifier. The quasi-optic power amplifier may include an output transistor coupled to the antenna assembly. A harmonic trap may be coupled to the quasi-optic power amplifier.

Antenna and quasi-optic power amplifier element and array for a radio frequency system

Disclosed is a method and system for unobtrusively measuring physical properties in electrochemical processes occurring in a predefined volume, such as the state of charge in an electrochemical battery. The invention provides for a coil (22) or (42) positioned relative to the predefined volume to minimize the reluctance path between the coil and the electrochemical process, with the winding axis of the coil generally transverse to a surface bounding the predefined volume. In this position, an alternating current is applied to the coil to generate an oscillatory magnetic field. Preferably, the coil includes a core (24) or a backing plate (46) for concentrating the magnetic field in a direction towards the process in the predefined volume. The physical properties are determined based upon a measurement of the electrical complex impedance of the coil, and data correlating the physical properties of the process with the electrical complex impedance of the coil.

Method and system for unobtrusively measuring physical properties in

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Seattle, WA, United States of America

Gregory A Kromholtz