Novel directional antennas are disclosed which utilize plas-monic surfaces (PS) that include or present an array of closely-spaced parasitic antennas, which may be referred to herein as “parasitic arrays” or fractal plasmonic arrays (FPAs). These plasmonic surfaces represent improved parasitic directional antennas relative to prior techniques and apparatus. Substrates can be used which are transparent and/or translucent.

Novel directional antennas are disclosed which utilize plas-monic surfaces (PS) that include or present an array of closely-spaced parasitic antennas, which may be referred to herein as “parasitic arrays” or fractal plasmonic arrays (FPAs). These plasmonic surfaces represent improved parasitic directional antennas relative to prior techniques and apparatus. Substrates can be used which are transparent and/or translucent.

A 5G dual-polarized antenna module and a terminal device are disclosed. The 5G dual-polarized antenna module comprises a substrate, a first metal ground and at least one antenna unit group are disposed in the substrate, the first metal ground partitions the substrate into a first region and a second region, the antenna unit group includes a first antenna unit and a second antenna unit which are located in the first region, and the first antenna unit comprises a dipole element and a parasitic element matched with the dipole element; the second antenna unit comprises a T-shaped probe, which is partially located between the dipole element and the parasitic element; and a first ground layer conductive with the first metal ground is disposed on the bottom surface of the substrate. The 5G dual-polarized antenna module thus being particularly suitable for light and thin terminal devices.

An apparatus includes a package and a beam former circuit. The package may be configured to be mounted on an antenna array at a center of four antenna elements. Each antenna element may include a dual-pole antenna having a vertical feed and a horizontal feed. The beam former circuit may be (i) disposed in the package, (ii) have a plurality of pairs of ports, (iii) configured to generate a plurality of radio-frequency signals in the ports while in a transmit mode and (iv) configured to receive the radio-frequency signals at the ports while in a receive mode. Each pair of the ports is configured to be directly connected to a respective one of the antenna elements. All of the ports may be spatially routed into alignment with the vertical feeds and the horizontal feeds in a single conductive plane of the antenna array.

An apparatus includes a package and a beam former circuit. The package may be configured to be mounted on an antenna array at a center of four antenna elements. Each antenna element may include a dual-pole antenna having a vertical feed and a horizontal feed. The beam former circuit may be (i) disposed in the package, (ii) have a plurality of pairs of ports, (iii) configured to generate a plurality of radio-frequency signals in the ports while in a transmit mode and (iv) configured to receive the radio-frequency signals at the ports while in a receive mode. Each pair of the ports is configured to be directly connected to a respective one of the antenna elements. All of the ports may be spatially routed into alignment with the vertical feeds and the horizontal feeds in a single conductive plane of the antenna array.

An array antenna device includes: a ground plate that is a flat-plate shaped conductor; an element antenna array in which a plurality of tapered slot antennas are linearly arranged on the ground plate along an electric field direction; and a metal plate provided at both ends or one end of an antenna aperture formed in the element antenna array arranged on the ground plate along the electric field direction, the metal plate having a height from the ground plate higher than a height of the tapered slot antenna.

An electronic device is described. This electronic device includes: an interface circuit; and an antenna having a radiator and multiple pairs of reflectors arranged along different axes passing through the radiator in a horizontal plane. A given pair of reflectors includes reflectors on opposite sides of the radiator and along a given axis. During operation, the interface circuit provides control signals to switching elements that selectively electrically couple one or more of the reflectors in the pairs of reflectors to ground, where the one or more of the reflectors modify an antenna radiation pattern of the radiator. Then, the interface circuit communicates, via the antenna, a packet or a frame with a second electronic device, where the communication involves transmitting or receiving wireless signals corresponding to the packet or the frame.

Radar radiation redirecting tapes (1, 2) include a first plurality of individual radar-reflecting directional antennae (5, 11). Each directional antenna comprises at least three elongate, unevenly spaced antenna conductors (10, 20, 30), arranged with their long extensions parallel to each other in the plane of the tape, such that the directional antenna is operable to reflect incoming radar radiation predominantly in a direction (80) which is orthogonal to the long extension of the antenna conductors and parallel to the plane of the tape.

Radar radiation redirecting tapes (1, 2) include a first plurality of individual radar-reflecting directional antennae (5, 11). Each directional antenna comprises at least three elongate, unevenly spaced antenna conductors (10, 20, 30), arranged with their long extensions parallel to each other in the plane of the tape, such that the directional antenna is operable to reflect incoming radar radiation predominantly in a direction (80) which is orthogonal to the long extension of the antenna conductors and parallel to the plane of the tape.

A system and method for detecting the presence of firearms adapted with embedded RFID tags is disclosed. A plurality of RFID interrogators sequentially and intermittently transmit short burst interrogating signals thereby causing RFID tags within range to transmit a responsive signal which may be used to activate alarms and other security measures. RFID tags are configured using an ASIC chip enabled for 10 Ghz wireless communication. The ASIC chip is embedded within a bolt carrier that includes a slotted antenna aperture resulting in extended range wireless communication. A plurality of RFID interrogators are installed in an detection area and transmit a radio frequency signals which excite any RFID enabled devices within range causing the devices to generate and transmit a response signal which may be used to trigger a variety of security measures such as sounding an alarm, locking doors, contacting law enforcement, etc.