Abstract: An antenna assembly minimizes reflection from a proximate reflective surface over a wide band and over a wide range of incident angles as a multi-layer diffuser. The planar structure includes first and second planar layers, each layer having first areas that are more conductive than second areas. Each area has a periphery that extends along a grid of first and second sets of parallel lines so that each area comprises one or more contiguous elements defined by the lines. The first and second areas are configured and arranged so that the planar layer can communicate electromagnetic energy wirelessly in a specific direction to the planar layer when an electrical connection is made to the first area(s). The first planar layer is positioned on top of the second planar layer. The respective second areas of second planar layer aligned with a corresponding second area of the first planar layer.

Abstract: An antenna assembly minimizes reflection from a proximate reflective surface over a wide band and over a wide range of incident angles as a multi-layer diffuser. The planar structure includes first and second planar layers, each layer having first areas that are more conductive than second areas. Each area has a periphery that extends along a grid of first and second sets of parallel lines so that each area comprises one or more contiguous elements defined by the lines. The first and second areas are configured and arranged so that the planar layer can communicate electromagnetic energy wirelessly in a specific direction to the planar layer when an electrical connection is made to the first area(s). The first planar layer is positioned on top of the second planar layer. The respective second areas of second planar layer aligned with a corresponding second area of the first planar layer.

Abstract: A low-profile electronically scanned phased arrays integrated multi-beam cylindrical array that can scan by connecting to one feed or multiple feeds at one time.

Abstract: A multiport microwave device for passively steering an antenna includes a substrate, a plurality of array ports on a first side of the substrate, where the array ports are configured for connection to one or more radiating elements, a plurality of beam ports on a second side of the substrate opposite the first side, where the beam ports are configured to transmit a signal received by at least one of the plurality of array ports, and a lens structure on the substrate disposed between the plurality of array ports and the plurality of beam ports, the lens structure configured to provide a phase shift for the signal between the array ports and the beam ports. In the multiport microwave device, the substrate may be rolled about an axis into a final shape having a predetermined radius of curvature in which portions of the multiport microwave device overlap one another.

Abstract: Methods for determining an optimum sector distribution within a coverage area of a wireless communication system are disclosed. A coverage area is divided into a number of sectors, each sector having a respective sector width. The wireless communication system emits a respective radiation pattern designated for each sector. The methods of the invention evaluate the interference in a given sector due to both neighboring radiation pattern main lobes and sidelobes from all other sectors within the coverage area using the same frequency channels. According to the methods of the invention, a sector width and/or radiation pattern may be determined which minimizes the interference, or undesired signal level, while maintaining a sufficiently uniform distribution of the desired signal level in each sector. The various embodiments of methods according to the invention may be implemented using software, for example, in the form of a simulation program.

Abstract: Wireless communication systems employing a sectored coverage area, and methods for determining a sector distribution within the coverage area. In one example, a wireless communication system emits radiation patterns in a sectored coverage area divided into at least two sectors. A first radiation pattern is designated substantially for a first sector, and one or more other radiation patterns are designated substantially for one or more other sectors. The sector distribution is based at least in part on a first desired signal level in the first sector due to the first radiation pattern and a first undesired interference level in the first sector due to the one or more other radiation patterns. In another example, the sector distribution is selected so as to maximize a ratio of the first desired signal level and the first undesired interference level. In another example, desired and undesired signal levels in other sectors are considered.