Itt Industries, Inc.

Itt Corporation

Itt Gilfillan, a Division of Itt Corporation

Ching-Fai Cho

William G Sterns

Helmut Carl Maiershofer

Do Bum Shin

Avery Yee Quil

Gregory G Charlton

Robert E Johnson

A multi-layer circuit structure including a plurality of substrate layers. At least one planar transmission line, including microstrip, stripline, or coplanar line, disposed on the plurality of substrate layers. A via transmission line connected to that at least one planar transmission line and extending through the plurality of substrate layers. The via transmission lines having the same topology as the at least one planar transmission line for providing wide frequency band transition between the via transmission lines and the at least one planar transmission line.

Wide frequency band transition between via RF transmission lines and

A high gain antenna that produces a pencil beam along the ground and a lower gain antenna that produces a beam extending above the pencil beam are coupled to a source of r.f. pulses so that the amplitude of the r.f. pulses applied to the high gain antenna is less than the amplitude of the r.f. pulses applied to the lower gain antenna during airplane detection and the full amplitude of the r.f. pulses during a pulse segment is applied to the high gain antenna during wind pattern detection.

ASR system for microburst detection

The variable directional coupler of the subject invention employs 3, 4 or n branches in TEM transmission media, such as coax, stripline and microstrip. Precise control of the coupling is acheived by a variable susceptance connected near the mid-point of the crossover.

Variable directional coupler

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Tujunga, CA, United States of America

Ching-Fai Cho