Abstract: A first antenna, a second antenna, and a waveguide structure are housed in a single cabinet. An operating frequency of the second antenna is higher than an operating frequency of the first antenna. The second antenna is an array antenna including a plurality of radiating elements. The waveguide structure is present outside a range of a half-value angle of a main beam as viewed from the first antenna, includes a unit waveguide disposed in a route of a radio wave received by the second antenna, and further attenuates a radio wave with the operating frequency of the first antenna.

Abstract: A communication network system is a communication network system that distributes information to a plurality of terminals inside a closed space. The communication network system includes a network server and a plurality of lighting fixtures each having an antenna that transmits and receives millimeter-wave-band communication signals to and from the terminals.

Abstract: A feed line connects an RFIC and a radiating element. A baseband ground plane (BB ground) is connected to a ground terminal of a BBIC. A radio frequency ground plane (RF ground) is placed in such a manner as to overlap the BB ground. The RF ground serves as a return path of the feed line. A first inter-ground connection circuit connects the BB ground and the RF ground. Furthermore, a second inter-ground connection circuit connects the BB ground and the RF ground. Connecting parts between these grounds and the second inter-ground connection circuit are arranged closer to the edges of these grounds than connecting parts between these grounds and the first inter-ground connection circuit. The connecting part between the ground and the second inter-ground connection circuit is placed on one side of a certain imaginary straight line that passes substantially the geometric center of the ground.

Abstract: A communication terminal capable of at least millimeter-wave communication and microwave communication is provided. The communication terminal includes a repeater that relays communication between a first communication terminal and a second communication terminal by using millimeter-wave communication. Such a communication terminal is capable of maintaining good millimeter-wave communication between terminals.

Abstract: A communication terminal device is a glasses-type communication terminal device having an optically transmissive display mounted thereon. The communication terminal device includes first and second radio-frequency modules that perform radio-frequency signal processing and a baseband module that is connected to the first and second radio-frequency modules via communication lines so as to be communicable and that performs baseband signal processing. The first and second radio-frequency modules are selectively switched by the baseband module to perform a reception operation. When the first radio-frequency module performs the reception operation, a reception signal received by the first radio-frequency module is retransmitted from the second radio-frequency module.

Abstract: An antenna device comprises a substrate including a planar first region and a planar second region; at least one first radiating element, arranged in the first region, that communicates a radio wave of a first frequency; and at least one second radiating element, arranged in the second region, that communicates a radio wave of a second frequency. A separation direction is a direction of a straight line connecting a first geometric center position of the at least one first radiating element and a second geometric center position of the at least one second radiating element, and in a case that the second region is viewed along a normal direction of the second region, an angle formed by the separation direction and a polarization direction of the at least one second radiating element is equal to or greater than 45° and equal to or less than 90°.

Abstract: A first antenna, a second antenna, and a waveguide structure are housed in a single cabinet. An operating frequency of the second antenna is higher than an operating frequency of the first antenna. The second antenna is an array antenna including a plurality of radiating elements. The waveguide structure is present outside a range of a half-value angle of a main beam as viewed from the first antenna, includes a unit waveguide disposed in a route of a radio wave received by the second antenna, and further attenuates a radio wave with the operating frequency of the first antenna.

Abstract: A communication device includes: a first body including a first display portion; a second body including a second display portion; a communication circuit that carries out millimeter-wave band communication; and one or more millimeter-wave band communication antennas provided in at least one of the first body and the second body.

Abstract: A communication network system is a communication network system that distributes information to a plurality of terminals inside a closed space. The communication network system includes a network server and a plurality of lighting fixtures each having an antenna that transmits and receives millimeter-wave-band communication signals to and from the terminals.

Abstract: A communication device includes: a first body including a first display portion; a second body including a second display portion; a communication circuit that carries out millimeter-wave band communication; and one or more millimeter-wave band communication antennas provided in at least one of the first body and the second body.

Abstract: A multilayer substrate includes a first dielectric layer and a conductor pattern disposed in at least an interior of the first dielectric layer. A second dielectric layer formed of a different material from a material of the first dielectric layer is disposed on the multilayer substrate. At least one radiation element is formed on the second dielectric layer. A feeding wire connects the radiation element and the conductor pattern. The feeding wire includes a conductor pin that is conductive and extends in a thickness direction of the second dielectric layer. The conductor pin electrically connects the radiation element and the conductor pattern. Provided is an antenna-integrated type communication module having such a structure that the accuracy of circuit simulation is easily enhanced and the degree of freedom in selection of dielectric materials is large.

Abstract: A communication terminal device is a glasses-type communication terminal device having an optically transmissive display mounted thereon. The communication terminal device includes first and second radio-frequency modules that perform radio-frequency signal processing and a baseband module that is connected to the first and second radio-frequency modules via communication lines so as to be communicable and that performs baseband signal processing. The first and second radio-frequency modules are selectively switched by the baseband module to perform a reception operation. When the first radio-frequency module performs the reception operation, a reception signal received by the first radio-frequency module is retransmitted from the second radio-frequency module.

Abstract: An antenna module includes a substrate that includes a first dielectric layer and a second dielectric layer with a dielectric constant different from a dielectric constant of the first dielectric layer, a first antenna that is disposed on or in the first dielectric layer and transmits and receives a signal in a first frequency band, a second antenna that is disposed on or in the second dielectric layer and transmits and receives a signal in a second frequency band which is a lower frequency band than the first frequency band, and a radio frequency circuit that is disposed on or in the substrate and is electrically connected to the first antenna.

Abstract: A feed line connects an RFIC and a radiating element. A baseband ground plane (BB ground) is connected to a ground terminal of a BBIC. A radio frequency ground plane (RF ground) is placed in such a manner as to overlap the BB ground. The RF ground serves as a return path of the feed line. A first inter-ground connection circuit connects the BB ground and the RF ground. Furthermore, a second inter-ground connection circuit connects the BB ground and the RF ground. Connecting parts between these grounds and the second inter-ground connection circuit are arranged closer to the edges of these grounds than connecting parts between these grounds and the first inter-ground connection circuit. The connecting part between the ground and the second inter-ground connection circuit is placed on one side of a certain imaginary straight line that passes substantially the geometric center of the ground.

Abstract: A communication terminal capable of at least millimeter-wave communication and microwave communication is provided. The communication terminal includes a repeater that relays communication between a first communication terminal and a second communication terminal by using millimeter-wave communication. Such a communication terminal is capable of maintaining good millimeter-wave communication between terminals.

Abstract: A smartphone case that enables millimeter-wave band communication to be robust in terms of connection stability is provided. The smartphone case is to be removably attached to a smartphone and includes one or more millimeter-wave band communication antennas associated with a communication circuit for carrying out millimeter-wave band communication. This configuration offers a high degree of flexibility in the layout of the one or more millimeter-wave band communication antennas, with the performance of a 5G communication system being fully exploited.

Abstract: A smartphone case that enables millimeter-wave band communication to be robust in terms of connection stability is provided. The smartphone case is to be removably attached to a smartphone and includes one or more millimeter-wave band communication antennas associated with a communication circuit for carrying out millimeter-wave band communication. This configuration offers a high degree of flexibility in the layout of the one or more millimeter-wave band communication antennas, with the performance of a 5G communication system being fully exploited.

Abstract: A communication device includes: a first body including a first display portion; a second body including a second display portion; a communication circuit that carries out millimeter-wave band communication; and one or more millimeter-wave band communication antennas provided in at least one of the first body and the second body.

Abstract: As such, in the disclosure, a slit is formed in a side plate. The slit has an opening in the upper end surface of the side plate. The opening has a width which is smaller than a thickness of the side plate and enables to correspond to a thickness t of the substrate and a length which enables to correspond to a length a of one side of the substrate. An RF antenna module is housed in the slit formed in the side plate of the housing to be accommodated in the housing by inserting the one side of the substrate through the opening of the slit, which is formed in the upper end surface of the side plate, and inserting the substrate into the slit by an amount equal to or larger than a length of another side of the substrate.