An angularly resolving radar sensor having multiple antenna elements that, in a direction in which the radar sensor is angularly resolving, are disposed in different positions, and having a control and evaluation device that is designed for an operating mode in which several of the antenna elements transmit signals that are respectively received by several of the antenna elements, and the angle (θ) of a located object is identified on the basis of amplitudes and/or phase relationships between signals which correspond to different configurations of transmitting and receiving antenna elements, wherein the control and evaluation device is embodied to supply several of the transmitting antenna elements simultaneously with identical-frequency signals (f.sub.1-f.sub.4) in such a way that the common phase center of said signals is located between the positions of two adjacent antenna elements.

A method and apparatus for managing an antenna. A current radiation pattern is identified for the antenna using initial coefficients for a modulation function for the antenna. A first constraint is applied to the current radiation pattern to form a modified radiation pattern. New coefficients for the modulation function are identified as coefficients for which a difference between a radiation pattern for the antenna generated using the coefficients and the modified radiation pattern is reduced. A second constraint is applied to a set of coefficients in the new coefficients to form modified coefficients for the modulation function. The steps of applying the first constraint, identifying the new coefficients for the modulation function, and applying the second constraint are iterated until a new radiation pattern based on the modified coefficients for the modulation function meets the first constraint.

The present disclosure provides a system and methods for mitigating, or reducing, the intermodulation of an adaptive antenna array's radiating elements. A tunable element may be used with a bias component to increase linearity of the system. These tunable elements may modify a radiating element's capacitance or damping rate. Adjusting the shape of the radiating element or using switches may also modify the resonance strength. Variable couplers may further be added to a system to reduce intermodulation. An adaptive antenna array using the techniques described herein may have all or some of the elements co-located.

A receive only smart antenna with a command pointing option for communicating with geostationary satellites that autonomously detects the directions from which desired signal are received, and steer the multiple beams accordingly. An array feed is used to illuminate a parabolic reflector. Each feed element of the receive only smart antenna is associated with a unique beam pointing direction. As a receiver is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The receive only smart antenna also features capabilities to form multiple simultaneous beams supporting operations of multiple geo-satellites in closely spaced slightly inclined orbits. The designs can support orthogonal beams for enhanced bandwidth capacity via multiple beams with excellent spatial isolation.

A wireless communication device includes a plurality of antenna elements arranged in a row and M (M≧2) analog processing units that are connected to the antenna elements and that perform analog processing on signals received by or to be transmitted by the antenna elements. The antenna elements form subarrays such that antenna elements connected to a same analog processing unit form one subarray. Each of the antenna elements belonging to the formed M subarrays is arranged at a position (mM+k)d away from a reference antenna element arranged at one end of the row, where k (0≦k<M) is an integer that varies from one subarray to another subarray, m is an arbitrary integer, d is a predetermined unit spacing.

A platform that automates providing wireless communication between one or more of a plurality of antennas and a moving vehicle that is traveling along a path. One or more of the plurality of antennas are employed to detect wireless signals communicated by the vehicle and/or wireless devices for the vehicle's passengers. In one or more embodiments, characteristics of the detected wireless signals and the plurality of antennas is employed to select an antenna to provide wireless communication with the vehicle and/or wireless devices for the vehicle's passengers at a current location on the path.

A support of an adjustability of an antenna beam direction is rendered less expensive in terms of implementation by the following measure: a beam forming network switchable between fixedly preconfigured beam forming states is coupled to an antenna array via a switching network switchable between different connecting states according to which the antenna interfaces of the beam forming network are connected to the antennas so that relative positions of the antennas connected to the antenna interfaces differ among the connection states, or more than one beam forming network is provided, each switchable between fixedly preconfigured beam forming states and coupled to a respective set of antennas of an antenna array, respectively, with the beam directions of provided be the beam forming networks being mutually disjoint.

Systems, methods, apparatuses, and computer program products for array antenna adaptive digital pre-distortion with Bayesian observation analysis are provided. One method may include selecting a plurality of patch elements from an array antenna of a network element. The method may also include determining an accuracy confidence value for each patch element. A set of coefficients of the antenna array may be generated. In addition, an ensemble of non-linear forward models may be generated using the accuracy confidence value and the set of coefficients. Further, an array of pre-distortion signals may be generated using the ensemble of non-linear forward models, and each antenna of the array antenna may be configured with a corresponding pre-distortion signal from the array of pre-distortion signals.

A signal distribution system includes: a first signal divider arranged to generate a first output oscillating signal according to a first input oscillating signal; a second signal divider arranged to generate a second output oscillating signal according to the first input oscillating signal; a first transmitting channel coupled to the first signal divider and the second divider for transmitting the first input oscillating signal to the first signal divider and the second signal divider; and a second transmitting channel coupled to the first signal divider and the second divider for transmitting a second input oscillating signal to the first signal divider and the second signal divider; wherein the first input oscillating signal has a first frequency, the second input oscillating signal has a second frequency, and the second frequency is smaller than the first frequency.

The present disclosure provides a system and methods for mitigating, or reducing, the intermodulation of an adaptive antenna array's radiating elements. A tunable element or tunable material, such as a phase change material or a state change material, may be used to increase linearity of the RF transmission properties. These phase or state change materials may modify a radiating element's electromagnetic response. In some embodiments, variable couplers may further be added to a system to reduce intermodulation. An adaptive antenna array using the techniques described herein may have all or some of the elements co-located.