Abstract: A wireless communication device includes an antenna, a communication module and a shield case. The antenna is disposed on an antenna board. The communication module is connected to the antenna and executes a wireless communication. The shield case stores the communication module inside the shield case. The antenna board is disposed to be in thermal contact with the shield case.

Abstract: An antenna device includes a ground plate, a line feeding element provided with a feeding point, first and second mushroom cells. Each mushroom cell includes a counter conductor plate disposed at a predetermined interval from the ground plate, and a short circuit portion electrically connecting the counter conductor plate and the ground plate. Each mushroom cell causes parallel resonance at a predetermined target frequency using an inductance of the short circuit portion and an electrostatic capacitance formed by the ground plate and the counter conductor plate. The line feeding element is disposed at an interval from the counter conductor plate of each mushroom cell, and the interval is less than a predetermined coupling limit value.

Abstract: An antenna device according to an aspect of the present disclosure includes a zeroth-order resonant antenna and a first-order resonant antenna. The zeroth-order resonant antenna includes a base plate, a platy radiation element, and a connection conductor connecting the base plate and the platy radiation element. The zeroth-order resonant antenna is configured to transmit and/or receive a first linearly polarized radio wave in all directions perpendicular to the first linearly polarized radio wave by zeroth order resonance. The first-order resonant antenna includes the base plate shared with the zeroth-order resonant antenna, and a first radiation element located on the same plane as the base plate. The first-order resonant antenna is configured to transmit and/or receive a second linearly polarized radio wave perpendicular to the first linearly polarized radio wave by first order resonance.

Abstract: An electronic circuit includes a first printed wiring board, a second printed wiring board and a third printed wiring board. The second printed wiring board is mounted such that one edge of the second printed wiring board abuts on a part mounting surface of the first printed wiring board on which a part is mounted. The third printed wiring board is mounted such that one edge of the third printed wiring board abuts on the part mounting surface. The second and third printed wiring boards are connected to each other in a state where plate thickness directions thereof are oriented in different directions from each other about a normal line to the part mounting surface. Further, at least one of the second printed wiring board and the third printed wiring board is provided with an antenna pattern.

Abstract: A wireless communication device includes an antenna, a communication module and a shield case. The antenna is disposed on an antenna board. The communication module is connected to the antenna and executes a wireless communication. The shield case stores the communication module inside the shield case. The antenna board is disposed to be in thermal contact with the shield case.

Abstract: An antenna device includes a ground plate, a patch portion disposed parallel to the ground plate with a particular spacing, a plurality of short circuit portions that electrically connect the patch portion to the ground plate, and a loop portion which is a loop shaped conductor member at a particular spacing from an outer edge portion of the patch portion. The patch portion has an area which forms an electrostatic capacitance that causes parallel resonance with an inductance provided by the short circuit portions at a particular target frequency. The loop portion is formed with a perimeter length which is an integral multiple of the wavelength of radio waves at the target frequency. A feed point is disposed on the loop portion, and current is supplied to the patch portion through the loop portion.

Abstract: A light-transmissive antenna includes: a transparent base made of a transparent insulating material; and an antenna pattern formed on the transparent base. The antenna pattern is made of a transparent electrically conductive film that is a film-like member having a predetermined transmittance and a predetermined electrical conductivity. The light-transmissive antenna includes a plurality of highly electrically conductive patterns arranged on the antenna pattern, each of the highly electrically conductive patterns being made of an electrically conducive member having a higher electrical conductivity than the transparent electrically conductive film and formed in a linear shape. Each of the plurality of highly electrically conductive patterns has a predetermined width set equal to or smaller than a value assumed as a resolution of human eyes.

Abstract: An antenna device includes a ground plate, a patch portion disposed parallel to the ground plate with a particular spacing, a plurality of short circuit portions that electrically connect the patch portion to the ground plate, and a loop portion which is a loop shaped conductor member at a particular spacing from an outer edge portion of the patch portion. The patch portion has an area which forms an electrostatic capacitance that causes parallel resonance with an inductance provided by the short circuit portions at a particular target frequency. The loop portion is formed with a perimeter length which is an integral multiple of the wavelength of radio waves at the target frequency. A feed point is disposed on the loop portion, and current is supplied to the patch portion through the loop portion.

Abstract: An antenna device according to an aspect of the present disclosure includes a zeroth-order resonant antenna and a first-order resonant antenna. The zeroth-order resonant antenna includes a base plate, a platy radiation element, and a connection conductor connecting the base plate and the platy radiation element. The zeroth-order resonant antenna is configured to transmit and/or receive a first linearly polarized radio wave in all directions perpendicular to the first linearly polarized radio wave by zeroth order resonance. The first-order resonant antenna includes the base plate shared with the zeroth-order resonant antenna, and a first radiation element located on the same plane as the base plate. The first-order resonant antenna is configured to transmit and/or receive a second linearly polarized radio wave perpendicular to the first linearly polarized radio wave by first order resonance.

Abstract: An antenna device includes a ground plate that is a plate-shaped conductor member, a patch portion that is a plate-shaped conductor member placed to be opposed to the ground plate with a predetermined distance therebetween, a short-circuit portion that is a conductor member electrically connecting together the patch portion and the ground plate, and an additional conductor that is a plate-shaped conductor member placed to be opposed to the patch portion with a predetermined distance therebetween. The additional conductor is placed on a side of the patch portion on which the ground plate is not placed. An inductance of the short-circuit portion, a capacitance formed by the ground plate and the patch portion, and a capacitance formed by the patch portion and the additional conductor are used to perform parallel resonance.

Abstract: An in-vehicle wireless system includes: multiple antennas; and multiple antenna housings that house the multiple antennas and are smaller in number than the multiple antennas. The multiple antenna housings include a vehicle interior antenna housing placed in a vehicle interior of a vehicle. The vehicle interior antenna housing houses an antenna for performing communication by connecting to a mobile communication line that is a public communication line that is connectable to a mobile wireless device.

Abstract: A GNSS receiver includes an antenna device. Whether an environment around the GNSS receiver is a multipath environment in which an occurrence of multipath is probable. The antenna device is set in a first reception mode with a first directivity in response to not determining that the environment around the GNSS receiver is the multipath environment. In contrast, the antenna device is set in a second reception mode in response to determining that the environment around the GNSS receiver is the multipath environment. The second reception mode is a mode with a second directivity having an elevation angle higher than an elevation angle of the first directivity of the first reception mode.

Abstract: An antenna device includes a ground plate, a patch section parallel to, and spaced apart from, the ground plate, a first short circuit section having a plurality of first conductive elements that electrically connect the patch section and the ground plate, and a second short circuit section having a plurality of second conductive elements electrically connected at one end to the ground plate. The plurality of first conductive elements are arranged in a circle with a first radius from a patch center point and provide a preset inductance. The plurality of second conductive elements are arranged in a circle with a second radius from the patch center point and provide a preset inductance.

Abstract: An electronic circuit includes a first printed wiring board, a second printed wiring board and a third printed wiring board. The second printed wiring board is mounted such that one edge of the second printed wiring board abuts on a part mounting surface of the first printed wiring board on which a part is mounted. The third printed wiring board is mounted such that one edge of the third printed wiring board abuts on the part mounting surface. The second and third printed wiring boards are connected to each other in a state where plate thickness directions thereof are oriented in different directions from each other about a normal line to the part mounting surface. Further, at least one of the second printed wiring board and the third printed wiring board is provided with an antenna pattern.

Abstract: An antenna device includes a ground part, a patch part disposed parallel to the ground part to oppose the ground part, a short-circuit part electrically connecting the patch part and the ground part, a patch area expansion part and a ground area expansion part. The patch area expansion part is provided on a patch-side opposing surface that is a surface of the patch part opposing the ground part to expand an effective surface area that is an apparent area of the patch-side opposing surface with respect to the ground part. The ground area expansion part is provided in a region opposing the patch area expansion part on a ground-side opposing surface that is a surface of the ground part opposing the patch part to expand an effective surface area of the ground-side opposing surface with respect to the patch part.

Abstract: This in-vehicle antenna to be used for wireless communication of a vehicle includes a horizontally polarized antenna, and a vertically polarized antenna that is separated from the horizontally polarized antenna by a predetermined distance. The in-vehicle antenna obtains, from among a plurality of signals received using the horizontally polarized antenna and the vertically polarized antenna, a plurality of signals transmitted at one time using a polarization technology.

Abstract: A light-transmissive antenna includes: a transparent base made of a transparent insulating material; and an antenna pattern formed on the transparent base. The antenna pattern is made of a transparent electrically conductive film that is a film-like member having a predetermined transmittance and a predetermined electrical conductivity. The light-transmissive antenna includes a plurality of highly electrically conductive patterns arranged on the antenna pattern, each of the highly electrically conductive patterns being made of an electrically conducive member having a higher electrical conductivity than the transparent electrically conductive film and formed in a linear shape. Each of the plurality of highly electrically conductive patterns has a predetermined width set equal to or smaller than a value assumed as a resolution of human eyes.

Abstract: An antenna device includes a ground plate that is a plate-shaped conductor member, a patch portion that is a plate-shaped conductor member placed to be opposed to the ground plate with a predetermined distance therebetween, a short-circuit portion that is a conductor member electrically connecting together the patch portion and the ground plate, and an additional conductor that is a plate-shaped conductor member placed to be opposed to the patch portion with a predetermined distance therebetween. The additional conductor is placed on a side of the patch portion on which the ground plate is not placed. An inductance of the short-circuit portion, a capacitance formed by the ground plate and the patch portion, and a capacitance formed by the patch portion and the additional conductor are used to perform parallel resonance.

Abstract: An antenna device includes a ground part, a patch part disposed parallel to the ground part to oppose the ground part, a short-circuit part electrically connecting the patch part and the ground part, a patch area expansion part and a ground area expansion part. The patch area expansion part is provided on a patch-side opposing surface that is a surface of the patch part opposing the ground part to expand an effective surface area that is an apparent area of the patch-side opposing surface with respect to the ground part. The ground area expansion part is provided in a region opposing the patch area expansion part on a ground-side opposing surface that is a surface of the ground part opposing the patch part to expand an effective surface area of the ground-side opposing surface with respect to the patch part.

Abstract: An antenna device includes a ground plate, a patch section parallel to, and spaced apart from, the ground plate, a first short circuit section having a plurality of first conductive elements that electrically connect the patch section and the ground plate, and a second short circuit section having a plurality of second conductive elements electrically connected at one end to the ground plate. The plurality of first conductive elements are arranged in a circle with a first radius from a patch center point and provide a preset inductance. The plurality of second conductive elements are arranged in a circle with a second radius from the patch center point and provide a preset inductance.