An onboard antenna module includes: a plate-shaped member that is fixed to a body of a vehicle and at least a portion of which is plate-shaped; and a plurality of antennas that are provided on the plate-shaped member, wherein a plurality of antennas included in the plurality of antennas provided on the plate-shaped member constitute a first diversity antenna configured to receive RF (Radio Frequency) signals in a first frequency band, and at least two antennas included in the plurality of antennas that constitute the first diversity antenna are respectively provided in two regions that are not adjacent to each other when a flat surface of the plate-shaped member is divided into quadrants around a center point of the flat surface.

Radar loss caused by a windshield having laminated glass in a vehicle is suppressed with a simple configuration. An antenna's radiation section is disposed inside the windshield of a vehicle having a plurality of layers. The radiation section not only radiates radio waves but also receives reflected waves of the radio waves from a target. A distance measurement information generation section is connected to the radiation section. The distance measurement information generation section measures a distance to the target on the basis of the radiated radio waves and the reflected waves from the target and generates distance measurement information.

A vehicle pane has a first substrate and at least one first electrically conducting layer, wherein an antenna structure is formed in the electrically conducting layer, wherein the antenna structure provides a Vivaldi-antenna-like structure, wherein the antenna structure has two substantially identical antenna elements, wherein the two antenna elements are arranged at an angle relative to one another, wherein the angle is greater than 0° and less than 180° such that the antenna elements appear substantially as mirror images at the angle bisector.

To suppress downward radiation of electromagnetic waves from an antenna unit.

An antenna unit to be used by being installed so as to face a window glass for a building, the antenna unit comprising a plurality of array antennas, wherein each of the plurality of array antennas has a plurality of radiating elements and at least one conductor situated on an interior side relative to the plurality of radiating elements, and where the effective wavelength of the plurality of array antennas at the operation frequency is λ, and an integer of 0 or more is n, the distance from the center of the upper radiating element among the plurality of radiating elements to the upper edge of the conductor in the up-and-down direction is (0.5+n)λ±0.22λ, as seen in a plan view of the antenna unit.

A remote antenna unit including at least one antenna configured to enable conversion between a digital signal and a radio signal; an external digital interface for providing the digital signal; and means for adapting performance of the antenna in dependence upon measurement of at least one parameter.

An antenna stack structure according to an embodiment includes a protective layer, and an antenna electrode layer formed directly on a surface of the protective layer. The antenna electrode layer includes a first electrode layer and a second electrode layer having a lower reflectance than that of the first electrode layer. A visual recognition of electrode are prevented by the second electrode layer.

A wireless communication structure, a display panel, and a wireless communication apparatus. The wireless communication structure includes a loop structure including a first connection end, a second connection end, and a coil body. At least a part of the coil body is connected between the first connection end and the second connection end; the antenna includes a millimeter-wave antenna unit configured to transmit and/or receive wireless signals in millimeter-wave band, and the millimeter-wave antenna unit is connected to the coil body. The millimeter-wave antenna unit is connected to the coil body of the loop structure, so that not only the loop structure and the antenna can be arranged in a limited space, but also a desired optical performance of the display screen can be ensured.

An antenna device includes a first conductor plate including a first end portion and a second end portion, the first conductor plate being provided with a first feeding portion between the first end portion and the second end portion, a second conductor plate including a third end portion connected to the first feeding portion, a fourth end portion located at a position away from the first conductor plate, and a plate surface of which width in a direction parallel to the first conductor plate increases with a distance from the third end portion toward the fourth end portion, and a third conductor plate including a fifth end portion capacitively coupling with the fourth end portion, a sixth end portion connected, on a same side as the first end portion with respect to the first feeding portion, to the first conductor plate, and a counter portion opposite the plate surface.

An antenna system includes a glass plate having a thickness of 1.1 mm or more and a dielectric loss tangent of 0.005 or more at 28 GHz, and an antenna located away from one of surfaces of the glass plate, wherein a ratio of electric power radiated from the antenna to electric power input into the antenna is defined as a radiation efficiency, and when an effective wavelength of an electromagnetic wave at a predetermined frequency is 10 GHz or more is denoted as λg and the radiation efficiency as η.sub.0 [dB] when the glass plate and the antenna are in contact, and is denoted as η.sub.λg/2 [dB] when a distance between the one of the surfaces and the antenna is λg/2, the glass plate and the antenna are arranged to obtain the radiation efficiency of η.sub.A [dB] that satisfies η.sub.A≥η.sub.0+(η.sub.λg/2−η.sub.0)×0.1.

A functional member-attached glass window includes a glass window to be erected on a floor surface and having a glass plate, and a functional member having a surface area smaller than that of the glass plate and arranged at a position apart from and higher than the floor surface, wherein the functional member is pasted to the glass plate via a spacer and joined to the spacer with a fastening part.