Abstract: A radio frequency (RF) system and a communication device are provided. The RF system includes a flexible circuit board, a first antenna module and a RF module. The flexible circuit board has a first surface and a second surface, and the first surface and the second surface are located at different sides of the flexible circuit board. The first antenna module is disposed on the first surface of the flexible circuit board. The first antenna module includes a first carrier, a first antenna element disposed on or in the first carrier, and a first conductive member between the first carrier and the flexible circuit board. The RF module is disposed on the second surface of the flexible circuit board and electrically connected to the first antenna module.

Abstract: An antenna structure is provided. The antenna structure includes a first metal layer and a second metal layer disposed over the first metal layer. The second metal layer forms a first antenna resonating element operating at a first band and has a first opening. The antenna structure also includes a third metal layer disposed over the second metal layer. The third metal layer forms a second antenna resonating element operating at a second band, which is different from the first band. The antenna structure further includes a first transmission line extending from the first metal layer to the second metal layer and a second transmission line extending from the first metal layer through the first opening to the third metal layer.

Abstract: An antenna module is provided. The antenna module includes a dielectric substrate, a radio frequency integrated circuit (RFIC) and a first number of first antennas. The radio frequency integrated circuit (RFIC) is disposed on the dielectric substrate, wherein the RFIC comprises a single first antenna port group and second antenna port groups to receive or transmit signals. The first number of first antennas is arranged in a first row on the dielectric substrate, wherein at least two of the first antennas are connected to the first antenna port group of the RFIC.

Abstract: An antenna and an electronic device including the antenna are provided. The antenna includes a pair of radiators, a pair of feeding elements, first and second feeding ports. The radiators are located beside a geometric origin and separated from each other. The geometric origin is located between the radiators. The feeding elements are located below the pair of radiators and are configured to feed signals to the radiators. The pair of feeding elements includes a first feeding element and a second feeding element that are separated from each other. The first feeding element has a first geometric configuration. The second feeding element has a second geometric configuration that is asymmetric to the first geometric configuration. The first feeding port is electrically connected to the first feeding element. The second feeding port is separated from the first feeding port and electrically connected to the second feeding element.

Abstract: An antenna is provided. The antenna includes a first radiator and a second radiator. The first radiator includes a first section and a second section. The first section includes a first grounding edge and a first bending edge. The second section is connected to the first bending edge. The first grounding edge is grounded. The first section is not parallel to the second section. A first slot is formed on the first section. The second radiator includes a third section and a fourth section. The third section includes a second grounding edge and a second bending edge. The fourth section is connected to the second bending edge. The second grounding edge is grounded. The third section is not parallel to the fourth section. The first section is parallel to the third section.

Abstract: An antenna module, comprising: a substrate; at least one first antenna array, located on the substrate, comprising at least one first antenna and having a first maximum radiation direction; and at least one second antenna array, located on the substrate, comprising at least one second antenna and having a second maximum radiation direction. A communication device using the antenna module is also disclosed.

Abstract: This disclosure provides a test kit for testing a device under test (DUT) including a socket structure for containing the DUT, and a plunger assembly detachably coupled with the socket structure. The plunger assembly includes a multi-layered structure having a nest and an interposer substrate installed under the nest.

Abstract: A semiconductor package structure is provided. The structure includes a package substrate having a first surface and a second surface opposite to the first surface and including a ground layer embedded therein. A semiconductor die is formed on the first surface of the package substrate and an antenna pattern layer is formed on the second surface of the package substrate and electrically coupled to the semiconductor die. The structure also includes a first connector and a second connector formed on the second surface of the package substrate and arranged adjacent to the antenna pattern layer. The first connector is electrically coupled to the semiconductor die and electrically isolated to the ground layer, and the second connector is electrically coupled to the ground layer. A wireless communication device including the semiconductor package structure is also provided.

Abstract: An antenna device includes a substrate, a feed line and an antenna. The substrate is formed with a non-opaque material. The feed line is disposed at the substrate and has a first terminal and a second terminal. The antenna is disposed at the substrate, electrically connected to the first terminal of the feed line, and is used to access a wireless signal. The second terminal of the feed line is electrically connected to a chip disposed on the substrate.

Abstract: A radio frequency (RF) system and a communication device are provided. The RF system includes a flexible circuit board, a first antenna module and a RF module. The flexible circuit board has a first surface and a second surface, and the first surface and the second surface are located at different sides of the flexible circuit board. The first antenna module is disposed on the first surface of the flexible circuit board. The first antenna module includes a first carrier, a first antenna element disposed on or in the first carrier, and a first conductive member between the first carrier and the flexible circuit board. The RF module is disposed on the second surface of the flexible circuit board and electrically connected to the first antenna module.

Abstract: An antenna device includes a substrate, a feed line and an antenna. The substrate is formed with a non-opaque material. The feed line is disposed at the substrate and has a first terminal and a second terminal. The antenna is disposed at the substrate, electrically connected to the first terminal of the feed line, and is used to access a wireless signal. The second terminal of the feed line is electrically connected to a chip disposed on the substrate.

Abstract: A multi-band antenna array includes first antenna elements and second antenna elements. Each first antenna element has a first shape spanned by a first long axis and a first short axis, the first long axis being longer than and perpendicular to the first short axis. Each second antenna element has a second shape spanned by a second long axis and a second short axis, the second long axis being longer than and perpendicular to the second short axis. The first long axis is non-parallel to the second long axis. The first antenna element and the second antenna element resonate at a high resonance frequency band along the first long axis and the second long axis, respectively, and the first antenna element and the second antenna element further resonate at a low resonance frequency band along the first short axis and the second short axis, respectively.

Abstract: A multi-band antenna array includes a plurality of first antennas for resonating at a first band, and a plurality of second antennas for resonating at a second band. A frequency of the second band is higher than a frequency of the first band. Locations of the plurality of first antennas project to a plurality of grid-one positions on a surface; locations of the plurality of second antennas project to a plurality of grid-two positions on the surface. Among the grid-one positions, a second grid-one position is nearest to a first grid-one position by a first distance along a first direction. Among the grid-two positions, a first grid-two position and a second grid-two position are closest two to the first grid-one position. The first and second grid-two positions are separated by a second distance along a second direction; and, the first direction and the second direction are nonparallel.

Abstract: A multi-band antenna array includes first antenna elements and second antenna elements. Each first antenna element has a first shape spanned by a first long axis and a first short axis, the first long axis being longer than and perpendicular to the first short axis. Each second antenna element has a second shape spanned by a second long axis and a second short axis, the second long axis being longer than and perpendicular to the second short axis. The first long axis is non-parallel to the second long axis. The first antenna element and the second antenna element resonate at a high resonance frequency band along the first long axis and the second long axis, respectively, and the first antenna element and the second antenna element further resonate at a low resonance frequency band along the first short axis and the second short axis, respectively.

Abstract: An antenna with swappable and selective radiation direction includes a first arm, a second arm electrically connected to the first arm, a third arm is electrically connected to the first arm, a first impedance tuning circuit coupled to the second arm for connecting the second arm to a ground or a first matching component according to a control signal, and a second impedance tuning circuit coupled to the third arm for connecting the third arm to the ground or a second matching component according to the control signal. By tuning impedance of the antenna, the antenna operates in a first mode corresponding to a first radiation direction or a second mode corresponding to a second radiation direction.

Abstract: A multi-band antenna array includes a plurality of first antennas for resonating at a first band, and a plurality of second antennas for resonating at a second band. A frequency of the second band is higher than a frequency of the first band. Locations of the plurality of first antennas project to a plurality of grid-one positions on a surface; locations of the plurality of second antennas project to a plurality of grid-two positions on the surface. Among the grid-one positions, a second grid-one position is nearest to a first grid-one position by a first distance along a first direction. Among the grid-two positions, a first grid-two position and a second grid-two position are closest two to the first grid-one position. The first and second grid-two positions are separated by a second distance along a second direction; and, the first direction and the second direction are nonparallel.

Abstract: An interface module for a communication device includes a first switch, for forming a first connection between a first feeding point of an antenna of the communication device and one of a first matching component and a first grounding component; a second switch, for forming a second connection between a second feeding point of the antenna and one of a second matching component and a second grounding component; and a third switch, for forming a third connection between a transceiver and one of the first matching component and the first grounding component.

Abstract: An antenna with swappable and selective radiation direction includes a first arm, a second arm electrically connected to the first arm, a third arm is electrically connected to the first arm, a first impedance tuning circuit coupled to the second arm for connecting the second arm to a ground or a first matching component according to a control signal, and a second impedance tuning circuit coupled to the third arm for connecting the third arm to the ground or a second matching component according to the control signal. By tuning impedance of the antenna, the antenna operates in a first mode corresponding to a first radiation direction or a second mode corresponding to a second radiation direction.

Abstract: A communication device including an antenna element, a ground element and a battery element is provided. The ground element has a short edge as a first edge and a long edge as a second edge. The antenna element is close to the first edge or at a dented section of the first edge. There is a notch in the ground element, and an open edge of the notch is at the second edge. The length of the notch is at least 0.3 times the maximum length of the ground element, and the width of the notch is at least 0.4 times the maximum width of the ground element.

Abstract: A communication device including a ground element and an antenna system is provided. The antenna system is adjacent to the ground element. The antenna system includes at least a first antenna, a second antenna, a connection element, and a resistive element. The second antenna is adjacent to the first antenna. The connection element includes a first portion and a second portion, wherein the first portion is coupled to the first antenna, and the second portion is coupled to the second antenna. The resistive element is coupled between the first portion and the second portion of the connection element. The connection element and the resistive element increase the isolation between the first antenna and the second antenna.