Abstract: A wearable device includes a frame element and a dielectric substrate. The frame element includes a first metal element, a second metal element, and a third metal element. A first gap is provided between the first metal element and the second metal element. A second gap is provided between the second metal element and the third metal element. A third gap is provided between the third metal element and the first metal element. The dielectric substrate is surrounded by the first metal element, the second metal element, and the third metal element. A first antenna element is formed by the first metal element. A second antenna element is formed by the second metal element. A third antenna element is formed by the third metal element.

Abstract: An electronic device is provided, and the electronic device includes a base, a cover plate, and a bezel. The base has a sidewall where an opening portion is formed. An airflow selectively passes through the opening portion. The cover plate is pivotally connected to the base. The bezel is movably connected to the cover plate, wherein the bezel is rotated facing the opening portion selectively. The arrangement of the bezel may reduce the gap between the bezel and the down edge of the opening portion of the base, reducing the airflow flowing downward back to the heat-dissipation mechanism in the base. Therefore, the heat-dissipation efficiency of the electronic device is enhanced.

Abstract: An integrated circuit includes a photodetector. The photodetector includes one or more dielectric structures positioned in a trench in a semiconductor substrate. The photodetector includes a photosensitive material positioned in the trench and covering the one or more dielectric structures. A dielectric layer covers the photosensitive material. The photosensitive material has an index of refraction that is greater than the indices of refraction of the dielectric structures and the dielectric layer.

Abstract: A mobile communication system and a usage scenario determination method for the same are provided. The usage scenario determination method comprises: determining a first antenna scenario based on a first impedance measurement on a first transmission antenna; determining a second antenna scenario based on either a second impedance measurement on a second transmission antenna or a sensor information or a receiving antenna tuner states sweeping result; and determining a usage scenario of the mobile communication system based on both the first antenna scenario and the second antenna scenario.

Abstract: A communication system for SAR (Specific Absorption Rate) reduction includes an RF (Radio Frequency), an antenna element, a coupler, and a controller. The RF module provides RF power. The antenna element is excited by the RF module. The coupler is coupled between the RF module and the antenna element. The controller receives antenna information from the coupler. The controller adjusts the level of RF power according to the antenna information.

Abstract: A high voltage device includes: a semiconductor layer, a well, a body region, a gate, a source, a drain, and a drift oxide region. The semiconductor layer is formed on a substrate, wherein the semiconductor layer has at least one trench. The well is formed in the semicoducotor layer. The body region is formed in the well. The gate is formed on the well, and is in contact with the well. The source and the drain are located below, outside, and at different sides of the gate, in the body region and the well respectively. The drift oxide region is formed on a drift region, wherein a bottom surface of the drift oxide region is higher than a bottom surface of the trench.

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 present invention relates to a slowly degraded alloy and a method for producing the same. The slowly degraded alloy comprises a degradable metal and a cladding layer. The degradable metal is completely covered with the cladding layer, such that a degradation rate of the degradable metal is decreased. Furthermore, because the cladding layer is made from polymer materials, the cladding layer does not be broken easily when a stress is applied to the slowly degraded alloy, thereby efficiently covering the degradable metal therein, and lowering the degradation rate of the degradable metal.

Abstract: A high voltage device includes: a semiconductor layer, a well, a body region, a gate, a source, a drain, and a drift oxide region. The semiconductor layer is formed on a substrate, wherein the semiconductor layer has at least one trench. The well is formed in the semiconductor layer. The body region is formed in the well. The gate is formed on the well, and is in contact with the well. The source and the drain are located below, outside, and at different sides of the gate, in the body region and the well respectively. The drift oxide region is formed on a drift region, wherein a bottom surface of the drift oxide region is higher than a bottom surface of the trench.

Abstract: A wireless communications circuit and an associated wireless communications device are provided. The wireless communications circuit may include a power amplifier with integrated filter (PAMiF) module and a two-stage switch module, and the two-stage switch module may include a first switch and a second switch. For example, a first port of the first switch is coupled to a filter port of the PAMiF module, and a second port of the first switch at an opposite side to the first port of the first switch is coupled to a first antenna. In addition, a first port of the second switch is coupled to a third port of the first switch at the opposite side to the first port of the first switch, and a second port of the second switch is coupled to a second antenna.

Abstract: A wireless communications circuit and an associated wireless communications device are provided. The wireless communications circuit may include a power amplifier with integrated filter (PAMiF) module and a two-stage switch module, and the two-stage switch module may include a first switch and a second switch. For example, a first port of the first switch is coupled to a filter port of the PAMiF module, and a second port of the first switch at an opposite side to the first port of the first switch is coupled to a first antenna. In addition, a first port of the second switch is coupled to a third port of the first switch at the opposite side to the first port of the first switch, and a second port of the second switch is coupled to a second antenna.

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: 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: A matching circuit for an antenna of whatever type, includes a ground circuit and a feed circuit. The ground circuit connects a ground terminal of the antenna to a ground voltage, and provides an inductive impedance between the ground terminal and the ground voltage. The feed circuit connects a feed signal to a feed terminal of the antenna. The feed circuit is capable of switching between a first mode and a second mode for respectively providing a first equivalent impedance and a second equivalent impedance between the feed signal and the feed terminal. An associated method is also disclosed.

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: A multi-antenna system is provided. The multi-antenna system includes a first antenna, a second antenna, a tunable circuit, and a frequency-divisional circuit. The first antenna is utilized to implement signals of a first frequency band. The second antenna is utilized to implement signals of a second frequency band. The second antenna is different from the first antenna, and frequencies of the second frequency band are greater than frequencies of the first frequency band. The tunable circuit is utilized to switch the signals of the first frequency band. The frequency-divisional circuit is utilized to suppress harmonics caused by the tunable circuit.

Abstract: A matching circuit for an antenna of whatever type, includes a ground circuit and a feed circuit. The ground circuit connects a ground terminal of the antenna to a ground voltage, and provides an inductive impedance between the ground terminal and the ground voltage. The feed circuit connects a feed signal to a feed terminal of the antenna. The feed circuit is capable of switching between a first mode and a second mode for respectively providing a first equivalent impedance and a second equivalent impedance between the feed signal and the feed terminal. An associated method is also disclosed.

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: The present disclosure provides an antenna structure, including a feed terminal, an intermediate grounding terminal, a tail grounding terminal, a conductive head section and a conductive intermediate section. The feed terminal is for connecting a feed signal. The intermediate grounding terminal is responsible for conducting to a ground plane via an intermediate impedance during a second operation mode, and ceasing conducting via the intermediate impedance during a first operation mode. The tail grounding terminal is for connecting the ground plane. The head section extends from the feed terminal to the intermediate grounding terminal along a loop. The intermediate section extends from the intermediate grounding terminal to the tail grounding terminal along the loop.

Abstract: A matching circuit for an antenna of whatever type, includes a ground circuit and a feed circuit. The ground circuit connects a ground terminal of the antenna to a ground voltage, and provides an inductive impedance between the ground terminal and the ground voltage. The feed circuit connects a feed signal to a feed terminal of the antenna. The feed circuit is capable of switching between a first mode and a second mode for respectively providing a first equivalent impedance and a second equivalent impedance between the feed signal and the feed terminal. An associated method is also disclosed.