A base station antenna comprises a plurality of columns of first radiating elements configured for operating in a first operational frequency band, each column of first radiating elements comprising a plurality of first radiating elements arranged in a longitudinal direction and an isolation wall positioned between adjacent columns of first radiating elements and extending in the longitudinal direction. The isolation wall comprises a frequency selective surface configured such that electromagnetic waves within the first operational frequency band are substantially blocked by the isolation wall.

A system 10 for providing communication services to user stations 14.1 to 14.n which are spaced on each of a first side 16 and a second side 18 of a corridor 12. The system comprises at least one corridor node 20. The corridor node comprises a radio transceiver arrangement 54 and a spaced reflector 70. The transceiver arrangement is connected to an antenna arrangement 58, which comprises a reflective feed antenna 67. The antenna arrangement has a radiation pattern comprising an elongate lobe 30, having a main axis 38, which illuminates user stations associated with the corridor node on one of the first side and the second side. The spaced reflector reflects signals 88 impinging from the reflective feed antenna in accordance with a reflected radiation pattern, comprising one reflected lobe 34, having a main axis 42, for illuminating user stations associated with the corridor node on the other of the first side and the second side.

An electromagnetic device includes: an electrically conductive ground structure; at least one dielectric resonator antenna (DRA) disposed on the ground structure; at least one electromagnetic (EM) beam shaper disposed proximate a corresponding one of the DRA; and, at least one signal feed disposed electromagnetically coupled to a corresponding one of the DRA. The at least one EM beam shaper having: an electrically conductive horn; a body of dielectric material having a dielectric constant that varies across the body of dielectric material in a specific direction; or, both the electrically conductive horn and the body of dielectric material.

A twin beam base station antenna includes a first array that has a plurality of columns of first frequency band radiating elements, the first array configured to form a first antenna beam that provides coverage throughout a first sub-sector of a three-sector base station. The radiating elements in a first of the columns in the first array have a first azimuth boresight pointing direction and the radiating elements in a second of the columns in the first array have a second azimuth boresight pointing direction that is offset from the first azimuth boresight pointing direction by at least 10°. The radiating elements in the second of the columns in the first array are electrically steered.

An antenna apparatus and a radio communications device are disclosed. The antenna apparatus includes a circuit board and a plurality of radiators. The plurality of radiators are all located on the circuit board. The plurality of radiators form at least one radiator array. Each radiator array includes a first column of radiators and a second column of radiators. In each radiator array, a polarization direction of the first column of radiators is perpendicular to a polarization direction of the second column of radiators, and radiators in the first column of radiators and radiators in the second column of radiators do not overlap. An end of each radiator in the first column of radiators points to a target location range of an adjacent radiator in the second column of radiators.

A signal radiation device and an antenna structure are provided. The signal radiation device includes a first signal radiator, a second signal radiator, and a reflective signal radiator. The first signal radiator is configured to perform a transceiving operation on a first signal along a first direction. The second signal radiator is disposed by overlapping with the first signal radiator, and is configured to perform the transceiving operation on at least one second signal along a second direction and/or a third direction. The first direction, the second direction, and the third direction are different. The reflective signal radiator is disposed between the first signal radiator and the second signal radiator, and is configured to perform the transceiving operation on a third signal omnidirectionally. A frequency band of the third signal is lower than a frequency band of the first signal and a frequency band of the second signal.

The invention provides for a broad band directional antenna (10) comprising a ground plane (12) having an axis (14) extending perpendicularly to the ground plane, an active radiator (13) which is axially spaced from the ground plane, a metamaterial ground plane assembly (16) and a conductive pillar (28.1) between the first conductive wall and the ground plane. The metamaterial ground plane assembly comprises a metamaterial ground plane (17), a first conductive wall (20) adjacent a periphery of the metamaterial ground plane, the first conductive wall having a bottom (22) and atop (24) and a second wall (26) comprising two mutually insulated conductive wall parts (26.1, 26.2) located spaced from and outside of the first conductive wall. The bottom of the first conductive wall is located between the ground plane and the metamaterial ground plane and the top of the first conductive wall is located beyond the active radiator.

A wireless communication system includes a first wireless communication device installed on an installation surface of a vehicle and a second wireless communication device. The first wireless communication device includes an antenna and a sensor. The antenna includes a first conductor, a second conductor, one or more third conductors, a fourth conductor, and a feeding line. The first wireless communication device transmits a signal from the antenna to the second wireless communication device, based on information detected by the sensor.

An antenna device is a device of 0th-resonance antenna, which includes: a ground plate providing a ground potential; an opposed conductor arranged to have a predetermined distance from the ground plate in a plate thickness direction of the ground plate and configured for connection to a feeder line; and a short-circuit part electrically connecting the opposed conductor and the ground plate. The antenna device further includes an intermediate conductor having a same potential as the ground plate and arranged in between the ground plate and the opposed conductor in the plate thickness direction. The intermediate conductor includes a penetration part that includes the opposed conductor in a plan view in the plate thickness direction.

A patch antenna includes a flat-plate radiating element; and a metal wall provided outside a peripheral edge of the radiating element, such that a wall surface of the metal wall intersects a line connecting a center of the radiating element and a feeding point. An antenna device for a vehicle includes: the patch antenna; a housing installed in a predetermined orientation at a predetermined position of the vehicle; and a support supporting the patch antenna such that the patch antenna is used for vertically polarized waves when the housing is installed in the predetermined orientation at the predetermined position.