Abstract: A system includes a direct radiating array antenna and one or more processors. The antenna includes an array of elements configured to radiate radiofrequency (RF) energy to form a beam having multiple frequency channels. The one or more processors are configured to generate an excitation plan for powering the elements to form the beam. The excitation plan assigns multiple corresponding beamforming coefficients to each element in a group of the elements. Each beamforming coefficient designates power allocated to the assigned element for radiating RF energy at an associated frequency channel. The excitation plan provides a substantially uniform power distribution among the elements in the group, and at least some of the elements in the group have different allocations of power among the multiple frequency channels of the beam than other elements in the group.

Abstract: A system includes a direct radiating array antenna and one or more processors. The antenna includes an array of elements configured to radiate radiofrequency (RF) energy to form a beam having multiple frequency channels. The one or more processors are configured to generate an excitation plan for powering the elements to form the beam. The excitation plan assigns multiple corresponding beamforming coefficients to each element in a group of the elements. Each beamforming coefficient designates power allocated to the assigned element for radiating RF energy at an associated frequency channel. The excitation plan provides a substantially uniform power distribution among the elements in the group, and at least some of the elements in the group have different allocations of power among the multiple frequency channels of the beam than other elements in the group.

Abstract: A tire has a tread pattern with superior performance characteristics. The tread pattern includes a generally oval shaped lug pattern having sidewalls that are of a variable angle. The sidewalls are also formed at an angle with respect to a vertical axis. The transitions between the sidewalls, as well as between the sidewalls and the oval shaped lug pattern have rounded edges to reduce stress components. A base of the lug is generally rectangular with convex sides.

Abstract: Tire having a tread pattern with superior performance characteristics. The tread pattern includes ribs and circumferential grooves which are at least one of tapered and/or generally V-shaped. The walls of each circumferential groove have a wavy and/or sinusoidal contour extending in a generally circumferential direction.

Abstract: A tire has a tread pattern with superior performance characteristics. The tread pattern includes a generally oval shaped lug pattern having sidewalls that are of a variable angle. The sidewalls are also formed at an angle with respect to a vertical axis. The transitions between the sidewalls, as well as between the sidewalls and the oval shaped lug pattern have rounded edges to reduce stress components. A base of the lug is generally rectangular with convex sides.