Abstract: An antenna device includes a plurality of dipole antennas and a port. Each of the dipole antennas is connected to the port. The plurality of dipole antennas is arranged around the port. Each of the plurality of dipole antennas includes two ends. The ends of the dipole antennas are arranged in a plurality of pairs. Each pair includes one end of one of the dipole antennas and one end of another one of the dipole antennas. The two ends in each pair are arranged in proximity to each other. One or more switches are configured to switch between (1) an omnidirectional state, in which the ends of the dipole antennas are not connected to each other; and (2) a directional state, in which the two ends in each of one or more of the pairs are connected to each other.

Abstract: An antenna device includes a plurality of dipole antennas and a port. Each of the dipole antennas is connected to the port. The dipole antennas are arranged around the port. Each of the dipole antennas comprises two ends. The device further includes a plurality of passive elements. The ends of the dipole antennas and the passive elements are interchangeably arranged around the port such that each of the passive elements is situated between ends of two different antennas from the plurality of dipole antennas. One or more switches are configured to switch between an omnidirectional state, in which the ends of the dipole antennas are not connected to the plurality of passive elements, and a directional state, in which at least one end of one of the passive elements is connected to at least one end of one of the antennas.

Abstract: An antenna and an electronic device are provided. The antenna includes: a radiating element pair, including a first radiating element and a second radiating element that are arranged in an annular array, where the first radiating element and the second radiating element are symmetrically arranged with respect to a symmetry line, the symmetry line passes through a center point of the annular array, and the first radiating element or the second radiating element is in an arc shape centered on the center point, or extends in a tangent direction of an arc shape centered on the center point; and a feed structure, including a first feed part and a second feed part, where the first feed part is coupled to the first radiating element, and the second feed part is coupled to the second radiating element.

Abstract: An antenna for a wireless communication device, such as a Wi-Fi access point is provided. The antenna includes an electrically conductive radiation structure including a plurality of radially extending radiation slots, each of which has an open outer end at a perimeter of the electrically conductive radiation structure and defines a respective radiation portion of the electrically conductive radiation structure. The antenna includes a feeding network configured to feed an RF signal to the electrically conductive radiation structure, the feeding network includes a plurality of feeding arms configured to feed the RF signal into each radiation portion of the electrically conductive radiation structure for exciting each radiation portion to emit electromagnetic waves.

Abstract: The application provides an antenna and a communications device, and pertains to the field of antenna technologies. The antenna includes a horizontally polarized antenna and a vertically polarized antenna that are disposed in a superposition manner. The horizontally polarized antenna includes a metal sheet, and the metal sheet can be separately connected to a double-sided parallel strip line in the horizontally polarized antenna and a first conductor of a coaxial cable. A diameter of a maximum inscribed circle of the metal sheet is greater than a line width of the double-sided parallel strip line, and both the metal sheet and the coaxial cable are located on a first side of a substrate. Therefore, the metal sheet can effectively suppress an induced current in the coaxial cable, and impact of the induced current on the vertically polarized antenna can be reduced.

Abstract: An antenna device includes a plurality of dipole antennas and a port. Each of the dipole antennas is connected to the port. The dipole antennas are arranged around the port. Each of the dipole antennas comprises two ends. The device further includes a plurality of passive elements. The ends of the dipole antennas and the passive elements are interchangeably arranged around the port such that each of the passive elements is situated between ends of two different antennas from the plurality of dipole antennas. One or more switches are configured to switch between an omnidirectional state, in which the ends of the dipole antennas are not connected to the plurality of passive elements, and a directional state, in which at least one end of one of the passive elements is connected to at least one end of one of the antennas.

Abstract: An antenna device includes a plurality of dipole antennas and a port. Each of the dipole antennas is connected to the port. The plurality of dipole antennas is arranged around the port. Each of the plurality of dipole antennas includes two ends. The ends of the dipole antennas are arranged in a plurality of pairs. Each pair includes one end of one of the dipole antennas and one end of another one of the dipole antennas. The two ends in each pair are arranged in proximity to each other. One or more switches are configured to switch between (1) an omnidirectional state, in which the ends of the dipole antennas are not connected to each other; and (2) a directional state, in which the two ends in each of one or more of the pairs are connected to each other.

Abstract: The application provides an antenna and a communications device, and pertains to the field of antenna technologies. The antenna includes a horizontally polarized antenna and a vertically polarized antenna that are disposed in a superposition manner. The horizontally polarized antenna includes a metal sheet, and the metal sheet can be separately connected to a double-sided parallel strip line in the horizontally polarized antenna and a first conductor of a coaxial cable. A diameter of a maximum inscribed circle of the metal sheet is greater than a line width of the double-sided parallel strip line, and both the metal sheet and the coaxial cable are located on a first side of a substrate. Therefore, the metal sheet can effectively suppress an induced current in the coaxial cable, and impact of the induced current on the vertically polarized antenna can be reduced.

Abstract: A printed dipole antenna includes a first printed dipole, a second printed dipole, a third printed dipole, a fourth printed dipole, a first feed line, a second feed line, a third feed line, and a fourth feed line. Feed lines parallel to the printed dipoles each include different segments, and each segment approaches a printed dipole on one side of the segment to suppress parasitic emission of the feed lines, and implement a low sidelobe level of the printed dipole antenna.

Abstract: A printed dipole antenna includes a first printed dipole, a second printed dipole, a third printed dipole, a fourth printed dipole, a first feed line, a second feed line, a third feed line, and a fourth feed line. Feed lines parallel to the printed dipoles each include different segments, and each segment approaches a printed dipole on one side of the segment to suppress parasitic emission of the feed lines, and implement a low sidelobe level of the printed dipole antenna.

Abstract: A multi-antenna system for differential wireless communication devices, such as transceivers, transmitters or receivers, includes a wireless communication device having a differential port including first and second nodes and a common ground for an antenna connection; a first antenna connected between the first node and the common ground; and a second antenna connected between the second node and the common ground.

Abstract: The operation of a mobile communication apparatus is enhanced particularly in the lower frequency portion of its bandwidth by connecting an electrically-conductive ground-enlarger to the electrically-conductive ground of the printed wired board (PWB) containing the communication circuitry such that the ground-enlarger effectively enlarges the ground of the PWB to load the antenna in the lower portion of its radio frequency band. The ground-enlarger may include stub ground-enlarger integrally formed on the PWB, or connected thereto, preferably at the end of the PWB opposite to that connected to the antenna. The antenna may be an internal antenna or an external antenna.

Abstract: The operation of a mobile communication apparatus is enhanced particularly in the lower frequency portion of its bandwidth by connecting an electrically-conductive reflector to the electrically-conductive ground of the printed wired board (PWB) containing the communication circuitry such that the reflector effectively enlarges the ground of the PWB to load the antenna in the lower portion of its radio frequency band. The reflector may include stub reflectors integrally formed on the PWB, or connected thereto, preferably at the end of the PWB opposite to that connected to the antenna. The antenna may be an internal antenna or an external antenna.

Abstract: A multi-band microwave antenna which is resonant and radiant at a high frequency band and at one or more lower frequency bands includes an electrically-conductive ground plane on one face of a dielectric substrate; an electrically conductive strip line on the opposite face of the dielectric substrate; a curved slot formed in the ground plane having a feed side electromagnetically coupled to the feed end of the strip line, and a load side electromagnetically coupled to the load end of the strip line, such that the slot is resonant and radiant at the high frequency band; and a further electrical conductor electrically connected to the ground plane to serve as a continuation thereof at the load side of the slot and electromagnetically coupled to the slot at the lower frequency bands such as to cause the slot to be resonant and radiant also at the lower frequency band or bands.