An active antenna may be installed within a ceiling assembly of a building to improve the range of a wireless and/or cellular network. Further, a ground plane may be installed throughout the ceiling to reduce the occurrence of multipath interference of radio frequency (RF) signals. In addition, one or more active and/or passive antennas may also be installed in the ceiling to further extend the range of the wireless and/or cellular network within the building. Each of the antennas may be designed to facilitate (RF) signal gain for a collection or range of frequencies. In some instances, the installation of active and/or passive antennas may increase the range of a communications network, while the installation of a ground plane throughout the ceiling may reduce the occurrence on multipath interference resulting in improved wireless and/or cellular network performance including increased bandwidth and range.

An active antenna may be installed within a ceiling assembly of a building to improve the range of a wireless and/or cellular network. Further, a ground plane may be installed throughout the ceiling to reduce the occurrence of multipath interference of radio frequency (RF) signals. In addition, one or more active and/or passive antennas may also be installed in the ceiling to further extend the range of the wireless and/or cellular network within the building. Each of the antennas may be designed to facilitate (RF) signal gain for a collection or range of frequencies. In some instances, the installation of active and/or passive antennas may increase the range of a communications network, while the installation of a ground plane throughout the ceiling may reduce the occurrence on multipath interference resulting in improved wireless and/or cellular network performance including increased bandwidth and range.

The present invention relates to a Yagi antenna and a wireless power transmission apparatus comprising the same, and the Yagi antenna includes a wireless power transmitting coil and first and second slabs made of a metamaterial having a CHDR structure in which cube-shaped resonators are arranged at a predetermined interval. The first slab is positioned at a rear side of the power transmitting coil and serves as a reflector that reflects an electromagnetic wave generated at the power transmitting coil, and the second slab is positioned between the power transmitting coil and a power receiving coil and serves as a super lens that focuses the electromagnetic wave generated at the power transmitting coil. The wireless power transmission apparatus improves efficiency of wireless power transmitted to the power receiving coil by using the Yagi antenna.

The present invention relates to a Yagi antenna and a wireless power transmission apparatus comprising the same, and the Yagi antenna includes a wireless power transmitting coil and first and second slabs made of a metamaterial having a CHDR structure in which cube-shaped resonators are arranged at a predetermined interval. The first slab is positioned at a rear side of the power transmitting coil and serves as a reflector that reflects an electromagnetic wave generated at the power transmitting coil, and the second slab is positioned between the power transmitting coil and a power receiving coil and serves as a super lens that focuses the electromagnetic wave generated at the power transmitting coil. The wireless power transmission apparatus improves efficiency of wireless power transmitted to the power receiving coil by using the Yagi antenna.

An antenna system and a processing method are provided. The antenna system includes a focus device and a multi-band feeding antenna array that is disposed in a focus area of the focus device, where the multi-band feeding antenna array includes antenna arrays on at least two frequency bands, the antenna arrays on the at least two frequency bands include at least an antenna array on a first target frequency band, the antenna array on the first target frequency band includes multiple feeding units that are arranged in a form of a non-one-dimensional linear array; the multi-band feeding antenna array is configured to radiate a first beam, where the first beam points to the focus device, and sub-beams separately generated by the antenna arrays on the at least two frequency bands constitute the first beam.

An antenna that is formed of a conductor pattern is disposed on a dielectric substrate. A high-frequency semiconductor device that supplies a high-frequency signal to the antenna is mounted on the bottom surface of the dielectric substrate. A plurality of conductor columns project from the bottom surface. The conductor columns are embedded in a dielectric member that is disposed on the bottom surface. An end of each of the conductor columns is exposed through the dielectric member. The dielectric member defines a mounting surface that faces a mounting substrate. A step is formed in a side surface of a composite structure that includes the dielectric substrate and the dielectric member, and a side surface extending from the mounting surface to the step is more recessed than a side surface that is located above the step.

A dual-polarized radiating element for a base station antenna includes a first dipole that extends along a first axis, the first dipole including a first dipole arm and a second dipole arm and a second dipole that extends along a second axis, the second dipole including a third dipole arm and a fourth dipole arm and the second axis being generally perpendicular to the first axis, where each of the first through fourth dipole arms has first and second spaced-apart conductive segments that together form a generally oval shape.

A wireless communication system provides an antenna apparatus for the wireless communication system. The antenna apparatus includes a base, a plurality of Yagi-Uda antenna modules disposed in a specific arrangement, a plurality of floating metal modules correspondingly installed in upper portions of the Yagi-Uda antenna modules and selectively connected to a corresponding Yagi-Uda module among the plurality of Yagi-Uda antenna modules, a switching element for selectively switching the floating metal module and the Yagi-Uda antenna module, and a controller for controlling the Yagi-Uda antenna module to comprise a directivity in a desired direction by selectively switching the switching element.

A wireless communication system provides an antenna apparatus for the wireless communication system. The antenna apparatus includes a base, a plurality of Yagi-Uda antenna modules disposed in a specific arrangement, a plurality of floating metal modules correspondingly installed in upper portions of the Yagi-Uda antenna modules and selectively connected to a corresponding Yagi-Uda module among the plurality of Yagi-Uda antenna modules, a switching element for selectively switching the floating metal module and the Yagi-Uda antenna module, and a controller for controlling the Yagi-Uda antenna module to comprise a directivity in a desired direction by selectively switching the switching element.

Exemplary embodiments are provided of internally fed directional folded Yagi antenna assemblies. In an exemplary embodiment, an antenna assembly generally includes a boom, a cable assembly, and a plurality of dipole elements spaced apart along the boom. The dipole elements include a folded dipole element. The feed cable assembly is internally fed inside the boom and a first section of the folded dipole element.