Abstract: A power conversion device and a method for preventing abnormal shutdown thereof are provided. The method includes: providing a power conversion device including a main power supply and a standby power supply electrically connected to the main power supply. The standby power supply is configured to provide an operational voltage for microcontrollers of the main power supply; performing a monitoring procedure for monitoring the operational voltage when the power conversion device entering a non-standby mode and the standby power supply is inactivated; and forcing the standby power supply to activate before the operational voltage is lower than a preset compensation voltage, such that an abnormal shutdown condition of the power conversion device while the operational power is equal to or lower than the preset compensating voltage is prevented.

Abstract: A portable communication device includes an appearance, a substrate and a switchable resonant antenna. The substrate is disposed in the appearance, and the substrate has a ground plane. The switchable resonant antenna comprises a first connection portion, a switching unit, a first metal element and a second metal element, where the first connection portion is electrically coupled between the ground plane and the switching unit, the switching unit is configured to electrically couple the first connection portion to the first metal element or the second metal element according to a control signal generated corresponding to a detecting result, in order to generate a first resonant mode.

Abstract: A power conversion device and a method for correcting decision threshold level thereof are disclosure. The method for correcting awaking-voltage of a power conversion device is provided. The method includes: fixing an output current of the power conversion module; monitoring a real decision threshold level of the power conversion module when the power conversion module departs from a burst mode; adjusting a preset decision threshold level based on the comparison between the real decision threshold level and the preset decision threshold level to make the preset voltage be equal to the real decision threshold level.

Abstract: A power conversion device and a method for preventing abnormal shutdown thereof are provided. The method includes: providing a power conversion device including a main power supply and a standby power supply electrically connected to the main power supply. The standby power supply is configured to provide an operational voltage for microcontrollers of the main power supply; performing a monitoring procedure for monitoring the operational voltage when the power conversion device entering a non-standby mode and the standby power supply is inactivated; and forcing the standby power supply to activate before the operational voltage is lower than a preset compensation voltage, such that an abnormal shutdown condition of the power conversion device while the operational power is equal to or lower than the preset compensating voltage is prevented.

Abstract: A power conversion device and a method for correcting decision threshold level thereof are disclosure. The method for correcting awaking-voltage of a power conversion device is provided. The method includes: fixing an output current of the power conversion module; monitoring a real decision threshold level of the power conversion module when the power conversion module departs from a burst mode; adjusting a preset decision threshold level based on the comparison between the real decision threshold level and the preset decision threshold level to make the preset voltage be equal to the real decision threshold level.

Abstract: An electronic device is provided. The electronic device includes a housing including a front face having a substantially rectangular shape and facing in a first direction, a rear face having a substantially rectangular shape and facing in a second direction that is opposite to the first direction, and first to fourth side face members that enclose a space between the front face and the rear face, wherein at least a portion of the first to fourth side face members is formed of a conductive material, a touch screen display exposed through the front face, and at least one wireless communication circuit arranged within the housing. The rear face includes a substantially flat conductive plate that constitutes a substantial portion of the rear face, and an elongated non-conductive strip that encloses the conductive plate when viewed from above the rear face, and extends along the first to fourth side face members.

Abstract: An electronic device is provided. The electronic device includes a housing and an antenna radiator disposed in the housing. An opening is formed in the housing. The opening includes a first portion configured to align with a length direction of the antenna radiator at a position corresponding to the antenna radiator and penetrate the housing in a thickness direction, and a second portion connected to the first portion, the second portion being configured to form a specified angle with respect to the length direction of the antenna radiator and penetrate the housing in a thickness direction. At least a portion of the housing, which surrounds the opening, comprises a conductive member. At least a portion of a circumference of the opening comprises an electrical open curve.

Abstract: An antenna module includes a grounding element, first and second radiating conductors, and a decoupling unit. The grounding element has first and second grounding ends. The first radiating conductor includes a first feed-in end that is adjacent spacedly to the first grounding end and that is configured to be fed with a first RF signal. The second radiating conductor includes a second feed-in end that is adjacent spacedly to the second grounding end and that is configured to be fed with a second RF signal. The decoupling unit is connected electrically between a portion of the first radiating conductor and a portion of the second radiating conductor that are proximate to each other, and is one of a decoupling capacitor and a decoupling inductor.

Abstract: A mobile communication device includes a case member, a circuit module and a radiating arm. The case member includes first and second case portions, each made of a metallic material. One of the first and second case portions has a feed-in portion configured to be fed with a radio frequency signal. One of the first and second case portions has a ground portion. The circuit module includes a radio frequency circuit and a ground conductor. The radio frequency circuit is coupled with the feed-in portion and is con figured to generate the radio frequency signal. The ground conductor is coupled to the ground portion and the first case portion. The radiating arm is coupled to the second case portion.

Abstract: A wideband antenna module includes a ground conductor, two radiating conductors and a decoupling inductor. Each of the radiating conductors includes a feed-in portion, a ground portion and three radiating portions. The feed-in portion is spaced apart from the ground conductor and has a feed-in end part. The ground portion is connected to the feed-in portion and the ground conductor. For each of the radiating conductors, the radiating portions are arranged in sequence from the feed-in portion to a free end part. The decoupling inductor is connected between the free end parts of the two radiating conductors.

Abstract: A portable communication device includes an appearance, a substrate and a switchable resonant antenna. The substrate is disposed in the appearance, and the substrate has a ground plane. The switchable resonant antenna comprises a first connection portion, a switching unit, a first metal element and a second metal element, where the first connection portion is electrically coupled between the ground plane and the switching unit, the switching unit is configured to electrically couple the first connection portion to the first metal element or the second metal element according to a control signal generated corresponding to a detecting result, in order to generate a first resonant mode.

Abstract: A mobile device includes a main antenna and a hairpin element. The hairpin element is disposed adjacent to the main antenna, and substantially has a U-shape. The hairpin element is configured to increase bandwidth and antenna efficiency of the main antenna.

Abstract: A mobile communication device includes a case member, a circuit module and a radiating arm. The case member includes first and second case portions, each made of a metallic material. One of the first and second case portions has a feed-in portion configured to be fed with a radio frequency signal. One of the first and second case portions has a ground portion. The circuit module includes a radio frequency circuit and a ground conductor. The radio frequency circuit is coupled with the feed-in portion and is con figured to generate the radio frequency signal. The ground conductor is coupled to the ground portion and the first case portion. The radiating arm is coupled to the second case portion.

Abstract: A wideband antenna module includes a ground conductor, two radiating conductors and a decoupling inductor. Each of the radiating conductors includes a feed-in portion, a ground portion and three radiating portions. The feed-in portion is spaced apart from the ground conductor and has a feed-in end part. The ground portion is connected to the feed-in portion and the ground conductor. For each of the radiating conductors, the radiating portions are arranged in sequence from the feed-in portion to a free end part. The decoupling inductor is connected between the free end parts of the two radiating conductors.

Abstract: A portable communication device includes an appearance, a substrate and a switchable resonant antenna. The substrate is disposed in the appearance, and the substrate has a ground plane. The switchable resonant antenna comprises a first connection portion, a switching unit, a first metal element and a second metal element, where the first connection portion is electrically coupled between the ground plane and the switching unit, the switching unit is configured to electrically couple the first connection portion to the first metal element or the second metal element according to a control signal generated corresponding to a detecting result, in order to generate a first resonant mode.

Abstract: A mobile device includes a ground element, a conductive bezel, a nonconductive layer, and a feeding element. The conductive bezel is substantially independent of the ground element. A slot is formed in the conductive bezel. The nonconductive layer is affixed to the conductive bezel and covers the slot of the conductive bezel. The feeding element is close to the slot of the conductive bezel and is coupled to a signal source. An antenna structure is formed by the feeding element and the slot.

Abstract: A wearable device includes a metal body, a nonconductive partition, and a metal loop. The metal body substantially has a hollow structure. The nonconductive partition is disposed on the metal body. The metal loop is disposed on the nonconductive partition. The metal loop has a feeding point and forms an antenna structure of the wearable device.

Abstract: A receiving device for a global positioning system and an antenna structure thereof. The receiving device includes a housing, a circuit board and the antenna structure. The circuit board is disposed inside the housing and has a ground portion and a signal feeding portion. The antenna structure is disposed inside the housing and includes a metal plate, a first electric conducting element and a second electric conducting element. The metal plate is used for receiving a GPS signal. The first electric conducting element has one end coupled to the metal plate, and the other end coupled to the ground portion of the circuit board. The second electric conducting element for feeding the GPS signal to the circuit board has one end coupled to the metal plate, and the other end coupled to the signal feeding portion of the circuit board.

Abstract: A handheld device includes an antenna area and an outer frame, wherein the outer frame includes a frame body and a carrier. The antenna area is for transmitting a radio frequency signal with a first wavelength and has a ground part and a feeding part. In addition, the ground part within the antenna area is electrically connected to a ground plane. The frame body of the outer frame has an extended area corresponding to the antenna area to form a projected feeding point. The carrier of the outer frame is disposed at the peripheral area of the opening of the frame body, wherein the peripheral area of the frame body has a first ground point electrically connected to the ground plane, and the spacing between the first ground point and the projected feeding point is correlated to the first wavelength.

Abstract: A broadband antenna with adjustable resonant frequency band includes a grounding element, first and second radiating conductors, and a variable capacitor. The first radiating conductor includes a feed-in portion and a radiating portion. The feed-in portion includes a feed-in end spaced apart from and adjacent to the grounding element. The second radiating conductor includes a coupling portion, and a short-circuit portion connected electrically between the coupling portion and the grounding element. The coupling portion is parallel to and couples with the radiating portion. The variable capacitor is connected electrically between the radiating portion and the coupling portion.