Abstract: An antenna module includes two antenna units, two isolation members, and a grounding member. Each antenna unit consists of two feeding ends, two first radiators, and two second radiators. The isolating members are disposed between the first and second portions of each antenna unit. The grounding member is disposed beside the two antenna units and the two isolation members. A first slot is formed among each first radiator, the second radiator, and the grounding member. The two second radiators are connected to the third radiator. A third slot is formed between the second radiator and the second portion. The two antenna units are symmetric to the fourth slot in a mirrored manner, and the two first portions have widths gradually changing along an extending direction of the fourth position.

Abstract: A wireless power transfer system includes a wireless power transmitter and a wireless power receiver. The wireless power receiver includes: a receiver resonator for wirelessly receiving power from the wireless power transmitter through resonant inductive coupling to generate an AC induced voltage; an AC-to-DC converter having a first input terminal and a second input terminal that are connected to the receiver resonator for receiving the AC induced voltage therefrom, and converting the AC induced voltage into a DC converted voltage; and a power storage element connected to the first and second input terminals of the AC-to-DC converter.

Abstract: A lock including a lock cylinder, at least one sensing module and a processing unit is provided. The lock cylinder is adapted for allowing a unlocking unit to insert therein along an inserting direction. The at least one sensing module detects a movement of the lock cylinder. The processing unit electrically connected to the at least one sensing module. The sensing module generates a sensing signal to the processing unit according to the movement of the lock cylinder.

Abstract: An RF power amplifier circuit includes a power divider, multiple power amplification circuits and a power combiner that cooperatively perform power amplification on an RF input signal so as to output an RF output signal, and an impedance conversion circuit that has a circuit terminal coupled to one of the power divider and the power combiner which has a microstrip structure, and that is configured such that a conversion impedance, which is an impedance seen into the impedance conversion circuit from the circuit terminal, matches an impedance seen into the power divider or the power combiner from the circuit terminal. The microstrip structure has a physical length associated with the conversion impedance.

Abstract: A wireless power transfer system includes a wireless power transmitter and a wireless power receiver. The wireless power receiver includes: a receiver resonator for wirelessly receiving power from the wireless power transmitter through resonant inductive coupling to generate an AC induced voltage; an AC-to-DC converter having a first input terminal and a second input terminal that are connected to the receiver resonator for receiving the AC induced voltage therefrom, and converting the AC induced voltage into a DC converted voltage; and a power storage element connected to the first and second input terminals of the AC-to-DC converter.

Abstract: An RF power amplifier circuit includes a power divider, multiple power amplification circuits and a power combiner that cooperatively perform power amplification on an RF input signal so as to output an RF output signal, and an impedance conversion circuit that has a circuit terminal coupled to one of the power divider and the power combiner which has a microstrip structure, and that is configured such that a conversion impedance, which is an impedance seen into the impedance conversion circuit from the circuit terminal, matches an impedance seen into the power divider or the power combiner from the circuit terminal. The microstrip structure has a physical length associated with the conversion impedance.

Abstract: A balun includes a first transmission line and a number (N) of second transmission lines. The first transmission line includes an end terminal for receiving or outputting a signal with a target wavelength, and having a length of half the target wavelength. Each of the second transmission lines is disposed adjacent to and spaced apart from the first transmission line so as to establish electromagnetic coupling therebetween, and includes first and second end terminals for cooperatively outputting or receiving a differential signal pair with the target wavelength.

Abstract: A lock including a lock cylinder, at least one sensing module and a processing unit is provided. The lock cylinder is adapted for allowing a unlocking unit to insert therein along an inserting direction. The at least one sensing module detects a movement of the lock cylinder. The processing unit electrically connected to the at least one sensing module. The sensing module generates a sensing signal to the processing unit according to the movement of the lock cylinder.

Abstract: A balanced up-conversion mixer includes: a negative resistance compensation circuit generating and outputting first and second currents based on a DC bias voltage; a mixing circuit allowing a differential radio frequency current (DRFC) signal pair to flow thereinto based on the first and second currents from the negative resistance compensation circuit, a differential oscillating voltage (DOV) signal pair and a differential intermediate frequency voltage (DIFV) signal pair; and a load circuit outputting a differential radio frequency voltage signal pair based on its impedance, the DC bias voltage and the DRFC signal pair. The DRFC signal pair has a frequency associated with those of the DOV and DIFV signal pairs.

Abstract: A balanced up-conversion mixer includes: a negative resistance compensation circuit generating and outputting first and second currents based on a DC bias voltage; a mixing circuit allowing a differential radio frequency current (DRFC) signal pair to flow thereinto based on the first and second currents from the negative resistance compensation circuit, a differential oscillating voltage (DOV) signal pair and a differential intermediate frequency voltage (DIFV) signal pair; and a load circuit outputting a differential radio frequency voltage signal pair based on its impedance, the DC bias voltage and the DRFC signal pair. The DRFC signal pair has a frequency associated with those of the DOV and DIFV signal pairs.

Abstract: A balun includes a first transmission line and a number (N) of second transmission lines. The first transmission line includes an end terminal for receiving or outputting a signal with a target wavelength, and having a length of half the target wavelength. Each of the second transmission lines is disposed adjacent to and spaced apart from the first transmission line so as to establish electromagnetic coupling therebetween, and includes first and second end terminals for cooperatively outputting or receiving a differential signal pair with the target wavelength.

Abstract: A frequency-shift keying (FSK) receiver includes an injection-locking oscillating circuit to receive a FSK input signal, and a phase detecting circuit. The injection-locking oscillating circuit outputs a locked signal having a phase that tracks a phase of the FSK input signal. A difference between the phases of the FSK input signal and the locked signal is associated with a difference between a frequency of the FSK input signal and a free-running frequency of the injection-locking oscillating circuit. The phase detecting circuit receives the FSK input signal and the locked signal, and outputs a baseband logic signal according to the difference between the phases of the FSK input signal and the locked signal.

Abstract: A frequency-shift keying (FSK) receiver includes an injection-locking oscillating circuit to receive a FSK input signal, and a phase detecting circuit. The injection-locking oscillating circuit outputs a locked signal having a phase that tracks a phase of the FSK input signal. A difference between the phases of the FSK input signal and the locked signal is associated with a difference between a frequency of the FSK input signal and a free-running frequency of the injection-locking oscillating circuit. The phase detecting circuit receives the FSK input signal and the locked signal, and outputs a baseband logic signal according to the difference between the phases of the FSK input signal and the locked signal.

Abstract: An LED light bar with a replaceable power source. A base is inserted with an LED lamp. A lampshade covers the lamp. Both ends of the base have a connector. One connector is connected with a power supply. A connecting base is provided between the power supply and the end portion of the base. This forms the disclosed LED light bar with a replaceable power supply.

Abstract: A status signal displaying system includes a motherboard, a micro-controller and a display device. The motherboard includes a central processing unit and a plurality of status signal generating circuits for generating status signals. The micro-controller is electrically connected to the status signal generating circuits. The display device is electrically connected to the micro-controller. The status signals are processed by the micro-controller, and the processed status signals are directly transmitted to the display device for display without being processed by the central processing unit.

Abstract: The present invention relates to a computer system and a power-saving method thereof. The computer system comprises a slot, a switch set, and a controlling module. An expansion card is capable of inserting into the slot. The switch set controls transmission of a power, a clock, and a bus signal to the slot. When activating a power-saving operation, the controlling module is capable of sending a controlling signal to command the switch set to cut off transmission of power, the clock, and the bus signal to the slot.