Abstract: A micro electro mechanical system (MEMS) includes a circuit substrate comprising electronic circuitry, a support substrate having a recess, a bonding layer disposed between the circuit substrate and the support substrate, through holes passing through the circuit substrate to the recess, a first conductive layer disposed on a front side of the circuit substrate, and a second conductive layer disposed on an inner wall of the recess. The first conductive layer extends into the through holes and the second conductive layer extends into the through holes and coupled to the first conductive layer.

Abstract: A method for evaluating radio performance of a device under test (DUT) comprises the following steps. A first set of points, a second set of points and a third set of points are defined to locate on a sphere surrounding the DUT. A signal power of the DUT is evaluated at the first set of points to identify a first region related to the first set of points. Candidates of the second set of points are selected based on the first region. The signal power of the DUT is evaluated at the candidates of the second set of points to identify a second region related to the second set of points. Candidates of the third set of points are selected based on the second region. The signal power of the DUT is evaluated at the candidates of the third set of points to identify a beam peak.

Abstract: A testing method for determining radiation performance of a device under test (DUT) is disclosed. The testing method comprises the following steps. The DUT is arranged at a first orientation. A first effective isotropic radiated power (EIRP) and a first effective isotropic sensitivity (EIS) of the DUT are measured at the first orientation. The DUT is arranged at a second orientation different from the first orientation, and a second EIRP of the DUT is measured at the second orientation. A second EIS of the DUT is measured at the second orientation according to a correlation between the first EIRP, the first EIS and the second EIRP.

Abstract: Various examples and schemes pertaining to a closed-loop antenna with multiple grounding points are described. An apparatus includes an electromagnetic (EM) wave interface device capable of radiating and sensing EM waves. The EM wave interface device includes a feeding port, a first grounding port coupled to an electric ground, and a second grounding port coupled to the electric ground. A first electrically-conductive path connected between the feeding port and the first grounding port forms a closed-loop antenna. A second electrically-conductive path connected between the feeding port and the second grounding port forms a non-radiative closed-loop path. A length of the first electrically-conductive path is greater than a length of the second electrically-conductive path.

Abstract: The invention is directed to a communication device. The communication device includes a millimeter-wave antenna array and an appearance metal element. The appearance metal element has an antenna window. The millimeter-wave antenna array is configured to transmit or receive a wireless signal. The wireless signal is transferred through the antenna window of the appearance metal element.

Abstract: The invention is directed to a communication device. The communication device includes a millimeter-wave antenna array and an appearance metal element. The appearance metal element has an antenna window. The millimeter-wave antenna array is configured to transmit or receive a wireless signal. The wireless signal is transferred through the antenna window of the appearance metal element.

Abstract: The present invention provides an antenna system for a user equipment (UE). The antenna system may include a housing of the UE and a radiated module including a first quantity of radiators. The housing may include a second quantity of openings. The radiated module may be arranged to excite the housing for wireless signaling at a target band; at the target band, a performance of the antenna system may be better than a performance of the radiated module alone without the housing.

Abstract: An antenna device may include a first antenna, a second antenna, a switch unit and a radio frequency chain circuit. The first antenna may be used to wirelessly transceive a first signal, and include a first feeding point used to transceive the first signal through a conductive path. The second antenna may be used to wirelessly transceive a second signal, and include a second feeding point used to transceive the second signal through a conductive path. The switch unit may be coupled among the first feeding point, the second feeding point and the radio frequency chain circuit and be used to selectively transceive one of the first signal and the second signal. The radio frequency chain circuit may be used to transceive and process the signal transceived by the switch unit. A nearest gap between the first antenna and the second antenna may be less than 30 millimeters.

Abstract: An antenna system includes an antenna, a first frequency dividing circuit, a second frequency dividing circuit, and a plurality of matching circuits. The first frequency dividing circuit is coupled to the antenna. The matching circuits are coupled to the first frequency dividing circuit. The second frequency dividing circuit is coupled to the matching circuits. The matching circuits are configured to process different frequency signals, respectively.

Abstract: Various examples and schemes pertaining to a closed-loop antenna with multiple grounding points are described. An apparatus includes an electromagnetic (EM) wave interface device capable of radiating and sensing EM waves. The EM wave interface device includes a feeding port, a first grounding port coupled to an electric ground, and a second grounding port coupled to the electric ground. A first electrically-conductive path connected between the feeding port and the first grounding port forms a closed-loop antenna. A second electrically-conductive path connected between the feeding port and the second grounding port forms a non-radiative closed-loop path. A length of the first electrically-conductive path is greater than a length of the second electrically-conductive path.

Abstract: An antenna tuning circuit for setting an antenna resonant mode of an antenna structure includes a switch arranged to selectively couple a first interconnection node to a second interconnection node, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure. An antenna tuning method for setting an antenna resonant mode of an antenna structure includes generating a first control signal and selectively coupling a first interconnection node to a second interconnection node in response to the first control signal, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure.

Abstract: An antenna system includes an antenna, a first frequency dividing circuit, a second frequency dividing circuit, and a plurality of matching circuits. The first frequency dividing circuit is coupled to the antenna. The matching circuits are coupled to the first frequency dividing circuit. The second frequency dividing circuit is coupled to the matching circuits. The matching circuits are configured to process different frequency signals, respectively.

Abstract: A communication device includes an antenna, a frequency dividing circuit, and at least one variable impedance circuit. The frequency dividing circuit has a common port coupled to the antenna and at least one output port. The frequency dividing circuit is configured to divide a frequency range received from the common port into a plurality of frequency sub-ranges and output at least one of the frequency sub-ranges respectively at the output port. Each variable impedance circuit is coupled between a corresponding output port of the frequency dividing circuit and a first reference voltage. Each variable impedance circuit provides a respective variable impedance value switched between different respective impedance values.

Abstract: A wireless communication device is used for performing wireless communication via at least one of a plurality of antennas. The antennas include a first antenna and a second antenna. The first antenna includes at least one first controllable component. The wireless communication device has at least one communication system and a control circuit. The at least one communication system is used to perform the wireless communication via at least one of the plurality of antennas. The control circuit is used to set the at least one first controllable component according to a first setting when the first antenna and the second antenna are active, and set the at least one first controllable component according to a second setting when the first antenna is inactive and the second antenna is active, where the second setting is different from the first setting.

Abstract: A mobile communication device for operating in LTE and WWAN bands is provided in the invention. The mobile communication device includes a system circuit board and an antenna. The system circuit board includes a system ground plane. The antenna includes: an antenna substrate, substantially parallel to the system ground plane; a first radiation element, disposed on the antenna substrate; a second radiation element, disposed on the antenna substrate; an antenna ground plane, disposed on the antenna substrate, and coupled to the system ground plane; and a transmission line, disposed on the antenna substrate, coupled to the first and second radiation elements, and having a feed point. The mobile communication device is further configured to accommodate a data transmission component.

Abstract: A wireless communications circuit includes: a transceiver; a power amplifier module including a plurality of power amplifiers coupled to the transceiver; a filter module, including a plurality of filters coupled to the power amplifier module; an antenna switching module coupled between the filter module and an antenna; a tunable matching network coupled between the antenna and the antenna switching module; and a baseband circuit coupled to the tunable matching network. The baseband circuit is used for generating a control signal to the tunable matching network to adjust an impedance of the tunable matching network, wherein the impedance of the tunable matching network is adjusted to be different values under different operating conditions of the wireless communications circuit.

Abstract: An antenna tuning circuit for setting an antenna resonant mode of an antenna structure includes a switch arranged to selectively couple a first interconnection node to a second interconnection node, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure. An antenna tuning method for setting an antenna resonant mode of an antenna structure includes generating a first control signal and selectively coupling a first interconnection node to a second interconnection node in response to the first control signal, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure.

Abstract: A communication device includes a system circuit board, a ground plane, a first antenna, a second antenna, a first metal element, and a second metal element. The ground plane is disposed on the system circuit board. The first metal element is substantially located between the first antenna and the second antenna. The first metal element is coupled to the ground plane such that a system ground plane is formed. The second metal element is adjacent to the first metal element and substantially located between the first antenna and the second antenna. The second metal element is coupled to the system ground plane. The first antenna, the second antenna, and the first metal element are substantially located at an edge of the system circuit board.

Abstract: A wireless communications circuit includes: a transceiver; a power amplifier module including a plurality of power amplifiers coupled to the transceiver; a filter module, including a plurality of filters coupled to the power amplifier module; an antenna switching module coupled between the filter module and an antenna; a tunable matching network coupled between the antenna and the antenna switching module; and a baseband circuit coupled to the tunable matching network. The baseband circuit is used for generating a control signal to the tunable matching network to adjust an impedance of the tunable matching network, wherein the impedance of the tunable matching network is adjusted to be different values under different operating conditions of the wireless communications circuit.

Abstract: A communication device includes a system circuit board, a ground plane, a first antenna, a second antenna, a first metal element, and a second metal element. The ground plane is disposed on the system circuit board. The first metal element is substantially located between the first antenna and the second antenna. The first metal element is coupled to the ground plane such that a system ground plane is formed. The second metal element is adjacent to the first metal element and substantially located between the first antenna and the second antenna. The second metal element is coupled to the system ground plane. The first antenna, the second antenna, and the first metal element are substantially located at an edge of the system circuit board.