Abstract: To optimize space efficiency in mounting a plurality of antennas compatible with different frequencies. According to the present disclosure, provided is an antenna device including a first antenna that operates at a first frequency, and a second antenna that is provided adjacent to the first antenna, operates at a second frequency lower than the first frequency, and has a ground potential connected to a grounding wire provided at the first antenna.

Abstract: To realize polarization MIMO in a more suitable form in a mobile communication apparatus. A communication apparatus includes a plurality of antenna parts configured to receive or transmit a wireless signal, a communication control part configured to control transmitting or receiving the wireless signal via at least any of the plurality of antenna parts, and a casing housing the communication control part, in which each of the plurality of antenna parts is held near each of a plurality of partial regions normal directions of which cross each other or the normal directions of which are mutually twisted in outer faces of the casing, and transmit or receive a first wireless signal and a second wireless signal propagating in directions substantially orthogonal to the partial regions and having mutually different polarization directions.

Abstract: [Problem] To prevent radiation waves from being reflected inside a casing when a plurality of antennas compatible with different frequencies are mounted. [Solution] According to the present disclosure, provided is an antenna apparatus including a first antenna that operates at a first frequency, and a second antenna that is arranged on an outer side of a casing relative to the first antenna, that operates at a second frequency lower than the first frequency, and that includes an opening in a radiation direction of the first antenna.

Abstract: To realize polarization MIMO in a more suitable form in a mobile communication apparatus. A communication apparatus includes a plurality of antenna parts configured to receive or transmit a wireless signal, a communication control part configured to control transmitting or receiving the wireless signal via at least any of the plurality of antenna parts, and a casing housing the communication control part, in which each of the plurality of antenna parts is held near each of a plurality of partial regions normal directions of which cross each other or the normal directions of which are mutually twisted in outer faces of the casing, and transmit or receive a first wireless signal and a second wireless signal propagating in directions substantially orthogonal to the partial regions and having mutually different polarization directions.

Abstract: An antenna device including: a substrate; a plurality of antenna elements supported by the substrate, each of the antenna elements having a feeding point; and a parasitic element supported by the substrate and having no feeding point, in which the plurality of antenna elements is disposed to be spaced apart from each other along a predetermined direction, the parasitic element is mutually spaced apart in the direction from a first antenna element located on an end side in the direction among the plurality of antenna elements, and a first element interval between the parasitic element and the first antenna element is equal to or less than twice a second element interval between the first antenna element and a second antenna element located on an opposite side of the parasitic element with respect to the first antenna element.

Abstract: A communication apparatus includes a plurality of antenna parts configured to receive or transmit a wireless signal, a communication control part configured to control transmitting or receiving the wireless signal via at least any of the plurality of antenna parts, and a casing housing the communication control part, in which each of the plurality of antenna parts is held near each of a plurality of partial regions normal directions of which cross each other or the normal directions of which are mutually twisted in outer faces of the casing, and transmit or receive a first wireless signal and a second wireless signal propagating in directions substantially orthogonal to the partial regions and having mutually different polarization directions.

Abstract: To optimize space efficiency in mounting a plurality of antennas compatible with different frequencies. According to the present disclosure, provided is an antenna device including a first antenna that operates at a first frequency, and a second antenna that is provided adjacent to the first antenna, operates at a second frequency lower than the first frequency, and has a ground potential connected to a grounding wire provided at the first antenna.

Abstract: Even a thin communication device is enabled to transmit or receive a polarized wave having a polarization direction substantially coinciding with a thickness direction of the communication device. An antenna device includes a first substrate extending in a first direction, a second substrate supported on the first substrate, and extending in both the first direction and a second direction orthogonal to the first direction, and an antenna element supported on a surface of the second substrate, the surface having a normal direction substantially coinciding with a third direction orthogonal to both the first direction and the second direction, and configured to transmit or receive a wireless signal having a polarization direction substantially coinciding with the second direction.

Abstract: [Problem] To prevent radiation waves from being reflected inside a casing when a plurality of antennas compatible with different frequencies are mounted. [Solution] According to the present disclosure, provided is an antenna apparatus including a first antenna that operates at a first frequency, and a second antenna that is arranged on an outer side of a casing relative to the first antenna, that operates at a second frequency lower than the first frequency, and that includes an opening in a radiation direction of the first antenna.

Abstract: To provide a technology that can suppress the reduction of an antenna gain while maintaining the quality of the design of the exterior furnishing of the antenna. Provided is an antenna apparatus including: an antenna module that includes a first slot antenna that transmits or receives a first wireless signal, a first feed element that supplies power to the first slot antenna, a second slot antenna that transmits or receives a second wireless signal having a polarization direction orthogonal to a polarization direction of the first wireless signal, and a second feed element that supplies power to the second slot antenna; and a metal plate that includes a first slot, and a second slot a longitudinal direction of which is orthogonal to a longitudinal direction of the first slot.

Abstract: To obtain a more favorable radiation pattern even in a case of arraying a plurality of antenna elements. An antenna device includes a dielectric substrate, a plurality of antenna elements that disposed along a first direction and respectively transmits or receives a first wireless signal and a second wireless signal having different polarization directions from one another, and a ground plate provided with a long slot to extend in a second direction in a region corresponding to a region between first and second antenna elements next to each other, and a length L in the second direction of the slop satisfies a conditional expression below where a wavelength of the wireless signal is ?0, a relative dielectric constant of the dielectric substrate is ?r1, and a relative dielectric constant of a dielectric located on an opposite side of the dielectric substrate with respect to the ground plate is ?r2. [ Math .

Abstract: A communication apparatus includes a plurality of antenna parts configured to receive or transmit a wireless signal, a communication control part configured to control transmitting or receiving the wireless signal via at least any of the plurality of antenna parts, and a casing housing the communication control part, in which each of the plurality of antenna parts is held near each of a plurality of partial regions normal directions of which cross each other or the normal directions of which are mutually twisted in outer faces of the casing, and transmit or receive a first wireless signal and a second wireless signal propagating in directions substantially orthogonal to the partial regions and having mutually different polarization directions.

Abstract: An antenna device including: a substrate; a plurality of antenna elements supported by the substrate, each of the antenna elements having a feeding point; and a parasitic element supported by the substrate and having no feeding point, in which the plurality of antenna elements is disposed to be spaced apart from each other along a predetermined direction, the parasitic element is mutually spaced apart in the direction from a first antenna element located on an end side in the direction among the plurality of antenna elements, and a first element interval between the parasitic element and the first antenna element is equal to or less than twice a second element interval between the first antenna element and a second antenna element located on an opposite side of the parasitic element with respect to the first antenna element.

Abstract: Even a thin communication device is enabled to transmit or receive a polarized wave having a polarization direction substantially coinciding with a thickness direction of the communication device. An antenna device includes a first substrate extending in a first direction, a second substrate supported on the first substrate, and extending in both the first direction and a second direction orthogonal to the first direction, and an antenna element supported on a surface of the second substrate, the surface having a normal direction substantially coinciding with a third direction orthogonal to both the first direction and the second direction, and configured to transmit or receive a wireless signal having a polarization direction substantially coinciding with the second direction.

Abstract: To obtain a more favorable radiation pattern even in a case of arraying a plurality of antenna elements. An antenna device includes a dielectric substrate, a plurality of antenna elements that disposed along a first direction and respectively transmits or receives a first wireless signal and a second wireless signal having different polarization directions from one another, and a ground plate provided with a long slot to extend in a second direction in a region corresponding to a region between first and second antenna elements next to each other, and a length L in the second direction of the slop satisfies a conditional expression below where a wavelength of the wireless signal is ?0, a relative dielectric constant of the dielectric substrate is ?r1, and a relative dielectric constant of a dielectric located on an opposite side of the dielectric substrate with respect to the ground plate is ?r2.

Abstract: An antenna device that includes an antenna having a single feed and a shunt circuit. The shunt circuit includes a first shunt matching circuit causing impedance, viewed from a main path connecting the antenna and a radio frequency circuit, to be substantially infinite with respect to all frequency ranges handled by the antenna, and a second shunt matching circuit providing a predetermined impedance characteristic with respect to a first subset of the frequency ranges handled by the antenna. Each of the first and second shunt matching circuits are selectively connected to the main path, and a selection controller of the antenna device controls selection of which of the first and second shunt matching circuits are connected to the main path.

Abstract: An antenna device that includes an antenna having a single feed and a shunt circuit. The shunt circuit includes a first shunt matching circuit causing impedance, viewed from a main path connecting the antenna and a radio frequency circuit, to be substantially infinite with respect to all frequency ranges handled by the antenna, and a second shunt matching circuit providing a predetermined impedance characteristic with respect to a first subset of the frequency ranges handled by the antenna. Each of the first and second shunt matching circuits are selectively connected to the main path, and a selection controller of the antenna device controls selection of which of the first and second shunt matching circuits are connected to the main path.