Reconfigurable antennas are provided. A reconfigurable antenna includes a plurality of antenna radiators and a plurality of feeds that are electrically or electromagnetically coupled to the plurality of antenna radiators. The plurality of feeds control current or voltage of the plurality of antenna radiators. Related methods of operating a reconfigurable antenna are also provided.

Reconfigurable antennas are provided. A reconfigurable antenna includes a plurality of antenna radiators and a plurality of feeds that are electrically or electromagnetically coupled to the plurality of antenna radiators. The plurality of feeds control current or voltage of the plurality of antenna radiators. Related methods of operating a reconfigurable antenna are also provided.

An antenna device includes a transmitting antenna including a transmission channel, a transmitting antenna including a transmission channel, a transmitting antenna including a transmission channel, a transmitting antenna including a transmission channel, and a receiving antenna including reception channels. An interval between the transmitting antenna and the transmitting antenna is wider than an overall width of the receiving antenna. An interval between the transmitting antenna and the transmitting antenna is narrower than an interval between adjacent channels among the reception channels.

A dipole antenna comprises N dipole elements spaced along a dimension of the antenna, each dipole element including a pair of electrically conductive structures and 2N electronic networks each coupled to a corresponding electrically conductive structure of an associated dipole element to form N pairs of electronic networks wherein each electronic network includes a port. The electrically conductive structures are electrically isolated from one another.

Techniques are provided for constructing a wide-beam antenna, for example a dipole antenna printed over an arbitrary ground plane. An example antenna includes at least one wide-beam dipole antenna cell, comprising a substrate, one or more signal lines disposed in the substrate, a conductive cladding disposed on the substrate, a dielectric layer disposed on the conductive cladding, a first sidewall via through the dielectric layer and electrically coupled to the conductive cladding, a second sidewall via extending through the dielectric layer and electrically coupled to the conductive cladding, a dipole antenna element disposed on the dielectric layer between the first sidewall via and the second sidewall via, a first director element disposed on the dielectric layer and extending toward the dipole antenna element, and a second director element disposed on the dielectric layer and extending toward the dipole antenna element.

An in-vehicle wireless display includes a slot antenna to transmit and receive data, a nonmagnetic member provided apart from a slot formed in the slot antenna, to cover the slot, and a display unit installed in a vehicle constituting a train, to display information on the basis of data received by the slot antenna.

A communication device includes: an antenna module that radiates a radio wave of a frequency higher than 6 GHz; a mounting substrate to which the antenna module is connected; and a housing that accommodates the mounting substrate. A display screen is formed on a portion of the housing. The housing includes a first surface and a second surface and has a substantially rectangular shape including a first long side, a second long side, a first short side, and a second short side in plan view in a normal direction of the first surface. The display screen is formed on the second surface side. The antenna module is arranged along the first long side of the housing and radiates a radio wave in two directions that are a normal direction of the first surface and a normal direction of a lateral surface along the first long side.

A communication device includes: an antenna module that radiates a radio wave of a frequency higher than 6 GHz; a mounting substrate to which the antenna module is connected; and a housing that accommodates the mounting substrate. A display screen is formed on a portion of the housing. The housing includes a first surface and a second surface and has a substantially rectangular shape including a first long side, a second long side, a first short side, and a second short side in plan view in a normal direction of the first surface. The display screen is formed on the second surface side. The antenna module is arranged along the first long side of the housing and radiates a radio wave in two directions that are a normal direction of the first surface and a normal direction of a lateral surface along the first long side.

Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of asymmetric point antennas formed on the substrate and excitable by a pump pulse of radiation to radiate THz radiation the point antennas having characteristic dimensions substantially smaller than wavelengths of the radiated THz; wherein the array comprises point antennas aligned in different directions.

Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of asymmetric point antennas formed on the substrate and excitable by a pump pulse of radiation to radiate THz radiation the point antennas having characteristic dimensions substantially smaller than wavelengths of the radiated THz; wherein the array comprises point antennas aligned in different directions.