Metawave Communications Corporation

Other

Ray K Butler

J Todd Elson

Douglas O Reudink

Curtis F McClive

Richard D Posner

Richard H Chesarek

Todd Achilles

Michael G Melville

An antenna system adapted to provide antenna beams having various characteristics, such as various beam widths and/or different orientations, is disclosed. In a preferred embodiment, the antenna system is adapted to provide forward link signals in wide antenna beams while providing reverse link signals in narrow antenna beams. In the preferred embodiment multiple forward link wide beams are provided to allow uniform radiation of forward link signals throughout a desired area, such as a sector of a cell, while multiple non-overlapping narrow antenna beams are provided in the reverse link. In the preferred embodiment passive or parasitic antenna elements are utilized in the antenna array to provide symmetric current distribution in the antenna array to provide multiple beams having uniform characteristics.

Planar antenna array with parasitic elements providing multiple beams of varying widths

Systems and methods are taught whereby amplification of narrowband signals may be accomplished by linear power amplifiers requiring the presence of a communicated broadband signal in order to make internal adjustments necessary for linear operation. A preferred embodiment is described utilizing an input of a distributed amplifier assembly unused by the signals of interest in order to inject an emulated CDMA tone operable as a pilot tone for use by the linear power amplifiers.

System and method providing amplification of narrow band signals with multi-channel amplifiers

Systems and methods are disclosed for providing calibration of the phase relationships of signals simulcast from a transmission system. In a preferred embodiment, a calibration signal is introduced into the transmission system and provided to various antenna elements. Samples of the calibration signal are taken at a point very near the antenna elements so as to sample phase shifts introduced by the transmission system. The signals of sets of the antenna elements are combined after sampling for transmission down the antenna mast to the active circuitry of the present invention. Accordingly, the present invention operates to selectively energize antenna elements of the sets so as to provide a single calibration signal down the combined signal path. Through reference to sampled signals one at a time, the present invention determines a necessary phase adjustment to result in the desired phase relationship of the signals at the antenna elements.

System and method for fully self-contained calibration of an antenna

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Woodinville, WA, United States of America

Ray K Butler