Abstract: An antenna structure includes a first resonant unit and a second resonant unit. The first resonant unit is configured to transmit an input signal as a first wireless signal. The second resonant unit is configured to transmit the input signal as a second wireless signal. The first resonant unit and the second resonant unit have a substantially identical operating band, and the first resonant unit and the second resonant unit are a single continuous metal structure.

Abstract: The present invention discloses a printed dual band antenna that includes a primary radiation portion and a parasitic radiation portion. The primary radiation portion is configured to perform signal transmitting and receiving based on a first resonant frequency and a second resonant frequency. The parasitic radiation portion is disposed on a neighboring side of the primary radiation portion, distanced from the primary radiation portion by a distance and electrically isolated from the primary radiation portion. The parasitic radiation portion couples to and resonates with the primary radiation portion to perform signal transmitting and receiving based on the second resonant frequency. The parasitic radiation portion is a grounded monopole parasitic antenna.

Abstract: An antenna includes a radiation body and a feed pin. The radiation body includes a first radiation branch and a second radiation branch. The first radiation branch extends along a first direction. The second radiation branch extends along a second direction. The feed pin extends outward from the radiation body along a third direction. The first direction is perpendicular to the second direction and the third direction.

Abstract: An antenna structure includes a first resonant unit and a second resonant unit. The first resonant unit is configured to transmit an input signal as a first wireless signal. The second resonant unit is configured to transmit the input signal as a second wireless signal. The first resonant unit and the second resonant unit have a substantially identical operating band, and the first resonant unit and the second resonant unit are a single continuous metal structure.

Abstract: The present invention discloses a printed dual band antenna that includes a primary radiation portion and a parasitic radiation portion. The primary radiation portion is configured to perform signal transmitting and receiving based on a first resonant frequency and a second resonant frequency. The parasitic radiation portion is disposed on a neighboring side of the primary radiation portion, distanced from the primary radiation portion by a distance and electrically isolated from the primary radiation portion. The parasitic radiation portion couples to and resonates with the primary radiation portion to perform signal transmitting and receiving based on the second resonant frequency. The parasitic radiation portion is a grounded monopole parasitic antenna.

Abstract: An antenna includes a radiation body and a feed pin. The radiation body includes a first radiation branch and a second radiation branch. The first radiation branch extends along a first direction. The second radiation branch extends along a second direction. The feed pin extends outward from the radiation body along a third direction. The first direction is perpendicular to the second direction and the third direction.

Abstract: A wireless communication device that includes an antenna module, a first communication circuit and a second communication circuit is provided. The first communication circuit performs communication by using a first communication protocol and transmits a test signal via the antenna module. The second communication circuit performs communication by using a second communication protocol and receives the test signal to calculate an isolation index based on an actual received power thereof. The second communication circuit determines that the antenna module includes two antennas when the isolation index is smaller than a threshold value to operate the first and the second communication circuits under a dual-antenna operation mode. The second communication circuit determines that the antenna module includes one antenna when the isolation index is not smaller than the threshold value to operate the first and the second communication circuits under a shared-antenna operation mode.

Abstract: A wireless communication device that includes an antenna module, a first communication circuit and a second communication circuit is provided. The first communication circuit performs communication by using a first communication protocol and transmits a test signal via the antenna module. The second communication circuit performs communication by using a second communication protocol and receives the test signal to calculate an isolation index based on an actual received power thereof. The second communication circuit determines that the antenna module includes two antennas when the isolation index is smaller than a threshold value to operate the first and the second communication circuits under a dual-antenna operation mode. The second communication circuit determines that the antenna module includes one antenna when the isolation index is not smaller than the threshold value to operate the first and the second communication circuits under a shared-antenna operation mode.

Abstract: An antenna set includes a first antenna, a second antenna, and a neutralized line. Each of the first antenna and the second antenna has a low frequency resonant path and a high frequency resonant path. The neutralized line is couple to the low frequency resonant path of the first antenna and the low frequency resonant path of the second antenna. The low frequency resonant path of the first antenna and the low frequency resonant path of the second antenna correspond to a first frequency band, the high frequency resonant path of the first antenna and the high frequency resonant path of the second antenna correspond to a second frequency band, and the two low frequency resonant paths do not overlap the two high frequency resonant paths.

Abstract: An antenna set includes a first antenna, a second antenna, and a neutralized line. Each of the first antenna and the second antenna has a low frequency resonant path and a high frequency resonant path. The neutralized line is couple to the low frequency resonant path of the first antenna and the low frequency resonant path of the second antenna. The low frequency resonant path of the first antenna and the low frequency resonant path of the second antenna correspond to a first frequency band, the high frequency resonant path of the first antenna and the high frequency resonant path of the second antenna correspond to a second frequency band, and the two low frequency resonant paths do not overlap the two high frequency resonant paths.

Abstract: A current breaker comprises a multi-layer printed circuit board (PCB), a ground plane, a metal component and a conductive via hole. The ground plane is disposed in a first metal layer of the multi-layer PCB and comprises a slot forming inductive impedance. The slot comprises an extended portion. The metal component is disposed in a second metal layer of the multi-layer PCB. Capacitive impedance is formed between the metal component and the ground plane. The projection of the metal component on the ground plane and the extended portion of the slot partially overlap. The conductive via hole penetrates the multi-layer PCB to connect metal component with the ground plane. The first and the second metal layers are any two metal layers of the multi-layer PCB. The inductive impedance formed by the slot and the capacitive impedance formed between the metal component and the ground plane create a parallel LC equivalent circuit.

Abstract: A switched beam smart antenna apparatus is disclosed including: a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth beam adjusting elements; a first, a second, a third, and a fourth beam control modules; a first, a second, a third, and a fourth radiation strips positioned within an area surrounded by the first to eighth beam adjusting elements; and a radiation strip control module for selecting either the first and second radiation strips or the third and fourth radiation strips to transmit signals. When the first beam control module conducts the first and second beam adjusting elements, the third beam control module does not conduct the fifth and sixth beam adjusting elements. When the second beam control module conducts the third and fourth beam adjusting elements, the fourth beam control module does not conduct the seventh and eighth beam adjusting elements.

Abstract: A dual-band antenna of a wireless communication apparatus includes a first radiation part for receiving or transmitting signals at a first frequency band; a second radiation part for generating a coupling effect together with the first radiation part to receive or transmit signals at a second frequency band having a center frequency lower than a center frequency of the first frequency band, wherein the second radiation part comprises multiple radiation sections, and at least one of the multiple radiation sections is positioned on a first plane; a feeding element for coupling with a signal receiving terminal of the wireless communication apparatus; and a shorting element for coupling with a fixed-voltage region of the wireless communication apparatus. The first radiation part does not physically contact with the second radiation part, and at least a portion of the first radiation part is not positioned on the first plane.

Abstract: A dual-band antenna, disposed in a substrate, is provided. The dual-band antenna includes: a feeding part and a slot antenna. The feeding part, disposed on a first side of the substrate, is used for feeding electromagnetic signals with a first resonance frequency and a second resonance frequency, wherein the second resonance frequency is substantially equal to twice the first resonance frequency. The slot antenna includes: a rectangular part with two long edges and two short edges, and a funnel part with a bottom edge, a top edge, and two side edges, wherein the bottom edge is shorter than the top edge, and the two side edges are equal in length substantially, the bottom edge of the funnel part is next to a short edge of the rectangular part, and a center line of the slot antenna corresponds to wavelength of the first frequency.

Abstract: A current breaker comprises a multi-layer printed circuit board (PCB), a ground plane, a metal component and a conductive via hole. The ground plane is disposed in a first metal layer of the multi-layer PCB and comprises a slot forming inductive impedance. The slot comprises an extended portion. The metal component is disposed in a second metal layer of the multi-layer PCB. Capacitive impedance is formed between the metal component and the ground plane. The projection of the metal component on the ground plane and the extended portion of the slot partially overlap. The conductive via hole penetrates the multi-layer PCB to connect metal component with the ground plane. The first and the second metal layers are any two metal layers of the multi-layer PCB. The inductive impedance formed by the slot and the capacitive impedance formed between the metal component and the ground plane create a parallel LC equivalent circuit.

Abstract: The invention discloses a voltage regulating apparatus which includes: an output stage providing the apparatus with an output voltage and producing a partial voltage of the output voltage; an error amplifier coupled to the output stage and comparing the partial voltage with a reference to produce a first voltage; a PWM unit coupled to the error amplifier and comparing the first voltage with a voltage signal to produce second and third voltages; a selection unit coupled to the error amplifier and the PWM unit and outputting a fourth voltage equalling either the first or the second voltage; a first transistor coupled to the selection unit and receiving the fourth voltage and a DC voltage; and a second transistor coupled to the PWM unit, the first transistor, and a ground and receiving the third voltage; wherein a connection point of the first and second transistors is connected to the output stage.

Abstract: An inverted-F antenna is disclosed including: a radiating body including a plurality of radiating portions, and some of the radiating portions located on a same plane; a shorting element extending outward from the radiating body and forming a first predetermined included angle with one of the radiating portions; a feeding element extending outward from the radiating body and forming a second predetermined included angle with one of the radiating portions; and a protrusion extending outward from the radiating body and forming a third predetermined included angle with one of the radiating portions; wherein at least one of the first, second, and third predetermined included angles is substantially a right angle.

Abstract: A switched beam smart antenna apparatus is disclosed including: a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth beam adjusting elements; a first, a second, a third, and a fourth beam control modules; a first, a second, a third, and a fourth radiation strips positioned within an area surrounded by the first to eighth beam adjusting elements; and a radiation strip control module for selecting either the first and second radiation strips or the third and fourth radiation strips to transmit signals. When the first beam control module conducts the first and second beam adjusting elements, the third beam control module does not conduct the fifth and sixth beam adjusting elements. When the second beam control module conducts the third and fourth beam adjusting elements, the fourth beam control module does not conduct the seventh and eighth beam adjusting elements.

Abstract: The invention discloses a voltage regulating apparatus which includes: an output stage providing the apparatus with an output voltage and producing a partial voltage of the output voltage; an error amplifier coupled to the output stage and comparing the partial voltage with a reference to produce a first voltage; a PWM unit coupled to the error amplifier and comparing the first voltage with a voltage signal to produce second and third voltages; a selection unit coupled to the error amplifier and the PWM unit and outputting a fourth voltage equalling either the first or the second voltage; a first transistor coupled to the selection unit and receiving the fourth voltage and a DC voltage; and a second transistor coupled to the PWM unit, the first transistor, and a ground and receiving the third voltage; wherein a connection point of the first and second transistors is connected to the output stage.

Abstract: An inverted-F antenna is disclosed including: a radiating body including a plurality of radiating portions, and some of the radiating portions located on a same plane; a shorting element extending outward from the radiating body and forming a first predetermined included angle with one of the radiating portions; a feeding element extending outward from the radiating body and forming a second predetermined included angle with one of the radiating portions; and a protrusion extending outward from the radiating body and forming a third predetermined included angle with one of the radiating portions; wherein at least one of the first, second, and third predetermined included angles is substantially a right angle.