Abstract: An antenna is provided, and includes a coaxial cable. The coaxial cable includes a core wire, an inner insulating layer, a metal layer and an outer insulating layer. The core wire includes a signal feeding portion, a connecting portion and a radiating portion. The connecting portion is electrically connected to the signal feeding portion and the radiating portion. The inner insulating layer encloses the connecting portion. The metal layer partially encloses the inner insulating layer. Parts of the metal layer are separated from the inner insulating layer and include a grounding portion. The outer insulating layer partially encloses the metal layer, and the grounding portion is exposed.

Abstract: A cable modem is used for supporting a multimedia over coax alliance (MoCA) standard and a data over cable service interface specification (Docsis) standard. The cable modem includes a first terminal coupled to the coaxial cable, a second terminal, a downstream processing circuit for the Docsis standard coupled to the second terminal, and a band pass filter coupled between the first terminal and the second terminal. The band pass filter receives a downstream signal with a plurality of television channel signals and a MoCA standard system signal from the coaxial cable via the first terminal, passes through and transmits the television channel signals of the downstream signal to the downstream processing circuit to be processed, and rejects a MoCA standard system signal of the downstream signal to prevent it from entering the downstream processing circuit.

Abstract: An isolation device includes a frame body and a cover body. The frame body is formed through stamping, and includes a base body and an abutting member. The abutting member is connected at a periphery at a side of the base body. The cover body includes a main body and a clamping member. The clamping member is connected at a periphery of the main body, and is inserted in the frame body at the cover body. The abutting member abuts tightly against the clamping member, thereby seamlessly integrating the cover body and the frame body. After the cover body is inserted in the frame body, the abutting member abuts tightly against the clamping member, achieving a seamless integration effect.

Abstract: A surge preventing circuit of a local area network (LAN) connector is suitable for being coupled to a plurality of transformers disposed in the local area network connector. The surge preventing circuit includes a conjugate coil module and a surge absorbing element. The conjugate coil module has at least one conjugate coil. The conjugate coil has a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal and the second input terminal of the conjugate coil are coupled to the center tapped terminal of the respective transformer, respectively. A first terminal of the surge absorbing element is connected to ground, and a second terminal is coupled to the first output terminals and the second output terminals.

Abstract: An electromagnetic shielding device with a heat dissipating function for shielding at least one electronic element on a circuit board is provided. The electromagnetic shielding device includes a frame, a cover, and a heat dissipating element. The frame is disposed on the circuit board and surrounds the electronic element, and the frame is one-piece and seamless. The cover has a top portion and a side portion bent from borders of the top portion. The heat dissipating element is disposed on the top portion. The top portion of the cover is connected to borders of the frame, and the side portion is tightly combined with the frame so that the cover, the frame and the circuit board form a shielding space to surround the electronic element.

Abstract: An electromagnetic shielding device with a heat dissipating function for shielding at least one electronic element on a circuit board is provided. The electromagnetic shielding device includes a frame, a cover, and a heat dissipating element. The frame is disposed on the circuit board and surrounds the electronic element, and the frame is one-piece and seamless. The cover has a top portion and a side portion bent from borders of the top portion. The heat dissipating element is disposed on the top portion. The top portion of the cover is connected to borders of the frame, and the side portion is tightly combined with the frame so that the cover, the frame and the circuit board form a shielding space to surround the electronic element.

Abstract: A surge preventing circuit of a local area network (LAN) connector is suitable for being coupled to a plurality of transformers disposed in the local area network connector. The surge preventing circuit includes a conjugate coil module and a surge absorbing element. The conjugate coil module has at least one conjugate coil. The conjugate coil has a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal and the second input terminal of the conjugate coil are coupled to the center tapped terminal of the respective transformer, respectively. A first terminal of the surge absorbing element is connected to ground, and a second terminal is coupled to the first output terminals and the second output terminals.

Abstract: A signal distribution inductor is suitable to be adsorbed by a surface mounting technology (SMT) apparatus. The signal distribution inductor includes a base, a separated iron-core, and a plurality of induction coils. The separated iron-core includes a first induced body and a second induced body, wherein the first induced body and the second induced body are provided at the base. The first induced body and the second induced body are joined together to form a joining surface through which the signal distribution inductor is adsorbed by the SMT apparatus. In addition, the first induced body has a first through hole, and the second induced body has a second through hole. The induction coils are wound on the first induced body, the second induced body and the base through the first through hole, the second through hole.

Abstract: The invention discloses an electronic device for supporting a multimedia over coax alliance (MoCA) standard. The electronic device is coupled with a coaxial cable. The electronic device includes an input terminal, a back stage processing unit, and a band pass filter. The input terminal is coupled with the coaxial cable. The band pass filter is coupled between the input terminal and the back stage processing unit, and it receives an input signal from the input terminal. The band pass filter allows a plurality of television channel signals in a predetermined frequency range to pass through and transmits them to the back stage processing unit to be processed. The band pass filter rejects a MoCA standard system signal to prevent it from entering the back stage processing unit.

Abstract: A connector with a high torsion support and the coaxial connector assembly thereof are provided. A supporting plate is provided behind the connector, and the supporting plate has a notch cooperating with an embedding portion of the connector, so that the embedding portion of the connector is restricted by the notch to provide the resistance along the rotating orientation for the connector. Thus, the torsion support of the connector is greatly increased.

Abstract: The invention discloses a network transformer, a network module thereof, and an electronic device thereof The network transformer includes a plurality of coil sets, an insulating board, a casing and a plurality of pins. The pins are disposed on the casing. The network transformer is disposed on a PCB via the pins. The insulating board is disposed in the casing and connects with at least two side walls of the casing to form a plurality of isolation chambers, each of which is for containing one coil set.

Abstract: An electromagnetic shielding device includes a frame and a cover. The frame is formed by bending a strip structure and disposed on a circuit board with an electronic component, and it encloses the electronic component. The cover has a top portion and a plurality of side portions. The side portions are expended and bent from the top portion. When the cover is combined with the frame to enclose the electronic component, the side portions are closely connected to the frame. The cover and the frame are combined to form a shielding space.

Abstract: A signal distribution inductor is suitable to be adsorbed by a surface mounting technology (SMT) apparatus. The signal distribution inductor includes a base, a separated iron-core, and a plurality of induction coils. The separated iron-core includes a first induced body and a second induced body, wherein the first induced body and the second induced body are provided at the base. The first induced body and the second induced body are joined together to form a joining surface through which the signal distribution inductor is adsorbed by the SMT apparatus. In addition, the first induced body has a first through hole, and the second induced body has a second through hole. The induction coils are wound on the first induced body, the second induced body and the base through the first through hole, the second through hole.

Abstract: A suppression circuit with high voltage isolation and surge suppression, which utilizes a safety capacitor to replace the surge protector and the capacitor in a conventional circuit, is provided. Therefore, the cost is greatly reduced. Via the characteristic of the safety capacitor, the suppression circuit can simultaneously meet the requirements of high voltage isolation and surge suppression. The design of the high-frequency shielding can be simplified with surface mount technology (SMT), and assembling time can be reduced. Moreover, the high-frequency shielding performance can be improved.

Abstract: A connector with a high torsion support and the coaxial connector assembly thereof are provided. A supporting plate is provided behind the connector, and the supporting plate has a notch cooperating with an embedding portion of the connector, so that the embedding portion of the connector is restricted by the notch to provide the resistance along the rotating orientation for the connector. Thus, the torsion support of the connector is greatly increased.

Abstract: A surface-mountable impedance device includes a substrate formed as a non-ceramic circuit board, and an iron core. The substrate has a contact mounting side adapted to be mounted on a main board of an electronic device, and a core mounting side opposite to the contact mounting side. The substrate is formed with a plurality of mounting holes that extend from the contact mounting side and through the core mounting side. The iron core is mounted on the core mounting side of the substrate, and has opposite end surfaces that are transverse to the substrate and that are formed with a pair of strand holes therethrough. Each of plurality of coil strands passes through a respective one of the strand holes, is wound around the iron core, and has opposite first and second end portions that extend to the contact mounting side of the substrate via the mounting holes, respectively.