3 results about "Lens antennas" patented technology

This invention discloses a microwave non-destructive testing device for grain moisture content. The device includes a shell, metamaterial lens antennas, a grain container, a 4.3-inch capacitive touchscreen, a coaxial cable, a near-infrared temperature probe, a microwave absorbing material plate, and a main control circuit board. The main control circuit board includes a main control chip, a 24GHz microwave transmitting circuit, and a 24GHz microwave receiving circuit. The main control circuit board is connected to symmetrical metamaterial lens antennas on both sides of the device via the coaxial cable. The device measures the change in scattering parameters between the two antennas using microwave signals, calculates the complex permittivity of the grain moisture content based on this change, and then uses a density-independent algorithm and a temperature calibration algorithm to invert the grain moisture content. The measurement results are displayed on the capacitive touchscreen. A microwave absorbing material plate is attached to the inner surface of the shell to reduce microwave reflection interference; a near-infrared temperature probe is used to quickly detect the grain temperature, reducing measurement errors caused by temperature.

Methods, systems, and devices for wireless communications are described. A network entity may generate a set of beamforming weights for a lens antenna associated with the network entity. Further, the network entity may generate the set of beamforming weights based on a convergence location corresponding to a target coverage area of a cell supported by the network entity. The convergence location may be based on the target coverage area and on one or more parameters of the lens antenna. As such, the network entity may transmit, via a set of antenna elements of the lens antenna, a signal to a user equipment (UE) in accordance with the set of beamforming weights for the lens antenna such that the signal may be spatially distributed within the target coverage area of the cell.

This invention relates to a DBF lens phased array antenna, belonging to the fields of wireless communication and antenna technology. It includes a low-cost planar electromagnetic lens, a sparse array antenna element, a coupling calibration network, a TR component, a cooling module, digital acquisition and DBF signal processing, and a power supply module. This invention combines a digital multi-beam phased array antenna with a lens antenna, exploring and researching low-cost DBF lens antennas to improve antenna gain. This provides technical support for reducing the cost of high-performance phased array antenna systems and lays a solid foundation for further reducing the cost of ad hoc network communication systems.