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.

Disclosed is a helmet provided with a radar reflector. The helmet includes a helmet body formed in a shape corresponding to a shape of a user head, and the radar reflector mounted on an outer surface of the helmet body to reflect a radar signal transmitted from radar equipment. The radar reflector includes a plurality of reflection units each concaved in a trigonal pyramid shape having one opened surface, each of the plurality of reflection units reflecting the radar signal. Thus, by applying the radar reflector to the helmet of a user aboard an object to be detected by using a radar signal, the radar signal is effectively reflected in bad weather or at night, thereby improving the recognition rate of radar equipment.

Disclosed is a helmet provided with a radar reflector. The helmet includes a helmet body formed in a shape corresponding to a shape of a user head, and the radar reflector mounted on an outer surface of the helmet body to reflect a radar signal transmitted from radar equipment. The radar reflector includes a plurality of reflection units each concaved in a trigonal pyramid shape having one opened surface, each of the plurality of reflection units reflecting the radar signal. Thus, by applying the radar reflector to the helmet of a user aboard an object to be detected by using a radar signal, the radar signal is effectively reflected in bad weather or at night, thereby improving the recognition rate of radar equipment.

A base station antenna includes a radome and an antenna assembly that is mounted within the radome. The antenna assembly includes a backplane that includes a first reflector, a first array that includes a plurality of first radiating elements mounted to extend forwardly from the first reflector, a second reflector mounted to extend forwardly from the first reflector and a second array that includes a plurality of second radiating elements mounted to extend forwardly from the second reflector. The first radiating elements extend a first distance forwardly from the first reflector and the second radiating elements extend a second distance forwardly from the second reflector, where the first distance exceeds the second distance.

A system for infrastructure system calibration includes a sensor configured to be mounted to an infrastructure component and configured to detect an object. A corner reflector has an optical pattern and is arranged within a field of view of the sensor. The corner reflector has three surfaces that meet at a point.

A reflector assembly configured to be disposed within a radome of the base station antenna. A reflector of the reflector assembly is composed of an aluminum alloy coated mild steel. Further, the reflector may include lateral sides extending along a longitudinal axis of the reflector, and each lateral side may be bent to form a U-shaped profile. Also, the reflector assembly comprises one or more support members and one or more mounting brackets that are adapted to provide support and facilitate mounting of the reflector in the radome. The one or more support members and the one or more mounting brackets may be composed of an aluminum alloy coated mild steel.

A multibeam antenna including a substrate, and further includes an antenna element, a first guiding apparatus, and a second guiding apparatus disposed on the substrate. The antenna element includes a first pole configured to receive a feeding signal and a second pole that is grounded. The first guiding apparatus enables a first beam generated by the antenna element to radiate in a first direction, and the second guiding apparatus enables a second beam generated by the antenna element to radiate in a second direction. A phase center of the antenna element is at an intersecting point of a first axis and a second axis, the first axis passing through a phase center of the first guiding apparatus and parallel to the first direction, and the second axis passing through a phase center of the second guiding apparatus and parallel to the second direction.

A multibeam antenna including a substrate, and further includes an antenna element, a first guiding apparatus, and a second guiding apparatus disposed on the substrate. The antenna element includes a first pole configured to receive a feeding signal and a second pole that is grounded. The first guiding apparatus enables a first beam generated by the antenna element to radiate in a first direction, and the second guiding apparatus enables a second beam generated by the antenna element to radiate in a second direction. A phase center of the antenna element is at an intersecting point of a first axis and a second axis, the first axis passing through a phase center of the first guiding apparatus and parallel to the first direction, and the second axis passing through a phase center of the second guiding apparatus and parallel to the second direction.

Systems and methods are provided for provisioning of telecommunications signals in moving trains. A scattering panel configured for redirecting signals in a train system, with the scattering panel having a plurality of facets. The plurality of facets together may combine to provide a plurality of adjacent curved reflectors, with at least one facet of the plurality of facets facing in a different direction relative to at least one other facet of the plurality of facets, with at least one facet of the plurality of facets having one or more flat planar surfaces and at least one other facet of the plurality of facets having a curved surface portion, and with at least one facet of the plurality of facets having structures configured for modifying signals propagating over a surface of the at least one facet in at least one direction relative to the surface.

A reflection apparatus includes a base plate, where one side is used to dispose a radiation unit, and the other side is used to dispose a feeding network; a first side plate and a second side plate that are separately connected to the base plate and that are disposed opposite to each other, where the first side plate and the second side plate each extend relative to the base plate and toward the side used to dispose the feeding network; a first return plate connected to the first side plate, where the first return plate extends relative to the first side plate and toward a direction of the feeding network; and a second return plate connected to the second side plate, where the second return plate extends relative to the second side plate and toward the direction of the feeding network.