Abstract: A direction finding antenna includes a substrate, a reflecting ring, and a plurality of radiating elements, wherein the substrate has a surface. The reflecting ring is disposed on the surface of the substrate and is formed by connecting a plurality of side wires and is a closed polygon. Each of the side wires forms a reflector. The radiating elements are disposed on the surface of the substrate and are respectively located on an outside of the side wires, and each of the radiating elements corresponds to one of the side wires. Each of the side wires and each of the corresponding radiating elements form an antenna structure, and the antenna structures face different directions, thereby providing the needed accuracy of direction finding in different directions.

Abstract: A thumb screw includes a main body and a rotating member. The main body has a shank and a threaded portion which are connected together along an axis of the main body. The shank has a groove and two guiding holes respectively located on two opposite sides of the groove and communicating with the groove. The rotating member has a head, a rod connected to an end surface of the head, and two pin portions connected to the rod. The head has two receiving grooves adapted to receive two partial end portions of the shank. When the two partial end portions leave the two receiving grooves and the two pin portions are respectively located in the two guiding holes, the rotating member could pivot around the two pin portions relative to the main body, thereby allowing the thumb screw to be received.

Abstract: A wireless communication device includes a casing having a wireless signal penetrating area, an antenna sending a wireless signal through the wireless signal penetrating area, and an electromagnetic lens assembly including a lens barrel and a lens. The lens barrel has a first end and a second end. The first end is closer to the wireless signal penetrating area than the second end. The lens disposed in the lens barrel has an incident surface and an emission surface on an axis of the lens. The incident surface is a flat surface facing the first end. The emission surface is a convex surface and has a curvature, which is not equal to 0, from a perspective of a first axis perpendicular to the axis of the lens, and has a curvature of 0 from a perspective of a second axis perpendicular to the axis of the lens and the first axis.

Abstract: A fan module is disposed with a fan mechanism having a fixing portion. The fixing portion has a first surface, a second surface, and a perforation passing through the first and the second surface, wherein the first surface and the second surface face opposite directions. A connector is disposed in the perforation and is electrically connected to a wire set which is adapted to transmit a signal or electric power. A shell of the connector includes a body for passing through the perforation and a protruding portion protruding away from a circumference of the body and abutting against the first surface of the fixing portion. The restricting member is detachably engaged with the fixing portion and the connector to clamp the protruding portion and the fixing portion by two restricting plates of the restricting member. With such design, the fan module could be installed to a site via the connector to achieve positioning and electrical connection once.

Abstract: A network switch can include a precision time protocol (PTP) module and a circuit board. The PTP module can provide a first clock signal and include a predetermined interface. The circuit board can include a socket, an oscillator and a selection unit. The socket can be inserted by the predetermined interface to receive the first clock signal. The oscillator can provide a second clock signal. The selection unit can include a first terminal, a second terminal, an output terminal and a selection terminal. The first terminal can receive the first clock signal when the predetermined interface is inserted into the socket. The second terminal can receive the second clock signal. The output terminal can output one of the first clock signal and the second clock signal. The selection terminal can receive a selection signal to control the output terminal to output the first clock signal or the second clock signal.

Abstract: A network device adapted for sending a synchronization packet to a slave device. The synchronization packet includes a timestamp field and a correction field. The network device includes a counting circuit, a communication chip, and a processor. The counting circuit is configured to provide a calendar time TOD. The communication chip includes a first port, a second port, and a timestamp circuit which has a bit number N. The processor is coupled to the first port of the communication chip. The processor is configured to: obtain a remainder R according to the calendar time TOD and the bit number N; and write the calendar time TOD and the remainder R into the synchronization packet.

Abstract: A network switch includes a circuit board and a plurality of transmission ports. The circuit board is disposed in a chassis, and an opening of the chassis is corresponding to a first reference line. The plurality of transmission ports are disposed on an edge of the circuit board. The edge is corresponding to a second reference line, and the first reference line and the second reference line form an acute angle.

Abstract: A circuit board mounting support for supporting a first electronic circuit integration includes a bearing member. The first electronic circuit integration includes a circuit board, an electronic component engaged with a first surface of the circuit board, and multiple legs for engaging with the bearing member. The circuit board has a mounting area for mounting the electronic component and a second surface opposite to the first surface. The bearing member includes a groove and an engaging portion connected to a peripheral edge of the groove. A corresponding area is defined on the bearing member and corresponds to the mounting area of the circuit board. When the bearing member is engaged with the circuit board, an opening of the groove and the engaging portion face the second surface. A junction that each of the legs is engaged with the bearing member is located out of the corresponding area.

Abstract: A parabolic antenna includes a main disc, a transmitting device, and a reflecting member. The main disc has a main surface that is arc-shaped. The transmitting device is disposed on the main disc and includes a transmitter and a reflector. The transmitter corresponds to the reflector. The reflector has a reflecting surface that is arc-shaped and corresponds to the main surface of the main disc. The reflecting member is detachably engaged with the reflecting surface of the reflector and corresponds to the transmitter. By engaging the reflecting member with the reflecting surface of the reflector or detaching the reflecting member from the reflecting surface, the parabolic antenna could form various configurations and provide different reflecting performances.

Abstract: A burn-in chamber is provided, configured to provide the required temperature for a device under test (DUT), including a side wall, a guiding plate, an air flow plate, a partition assembly, and a fan. The air flow plate has a ventilation structure, and the guiding plate is located between the side wall and the air flow plate. The partition assembly is disposed on both sides of the air flow plate. The partition assembly and the air flow plate together form an accommodating space for accommodating the DUT. The partition assembly forms a return channel with respect to the other side of the accommodating space with the side wall. When the fan is active, air from the accommodating space passes through the air flow plate and is guided to the return channel via the guiding plate, and air is returned to the accommodating space through the return channel.

Abstract: A wireless device includes an antenna circuit and a controller. The antenna circuit includes a plurality of antennas. Each of the plurality of antennas is configured to surround a reference point and arrange with an equal interval between each other. The controller is coupled to the antenna circuit and configured to compute a strength of a signal of each of the plurality of antennas to choose a plurality of indicated antennas from the plurality of antennas; compute the signal of each two of the plurality of indicated antennas to obtain a plurality of composite signals; and compute a plurality of phase angles according to the plurality of composite signals to compute a positioning angle by using the plurality of phase angles.

Abstract: A wireless access point device includes a main frame, an antenna module, a signal transceiving element, an unlocking assembly and a fastener. The main frame includes a casing and a first connection portion formed with a fastening recess, connected to the casing and communicates with the internal space. The signal transceiving element is located in the casing. The antenna module includes a waveguide and a second connection portion disposed on one end of the waveguide. The second connection portion is detachably connected to the first connection portion to couple to the signal transceiving element. The unlocking assembly is movably located in the fastening recess. The fastener includes a buckle, and an elastic member that is connected to the second connection portion and the buckle. The antenna module is fixed on the main frame when the buckle is inserted into the fastening recess.

Abstract: A network system includes P upper switches, Q lower switches, and a first mapping device. Each upper switch of the P upper switches includes a plurality of upper ports. A group of upper switches selected from the P upper switches includes P1 upper switches. Each lower switch of the Q lower switches includes a plurality of upper ports. The first mapping device includes P1 upper adapter terminals coupled to a part of upper ports of the P1 upper switches, and P1 lower adapter terminals coupled to lower ports of a part of Q lower switches. The first mapping device is used for allocating a plurality of transmitting channels and receiving channels received by each upper adapter terminal to the P1 lower adapter terminals.

Abstract: A microstrip collinear array includes a bearing member, two first antenna assemblies, two second antenna assemblies, a first connecting line, and a second connecting line. The two first antenna assemblies are juxtaposed on the bearing member. Each of the first antenna assemblies includes several first planar antennas. The two second antenna assemblies are juxtaposed on the bearing member and are respectively and correspondingly located on an opposite side of the two first antenna assemblies. Each of the second antenna assemblies includes several second planar antennas. The first connecting line and the second connecting line are disposed on the bearing member. The second connecting line is located on an opposite side of the first connecting line and is electrically connected to the first connecting line. The first connecting line is electrically connected to the first antenna assemblies. The second connecting line is electrically connected to the second antenna assemblies.

Abstract: A fan module configured to be detachably connected to an electronic device includes an electrical connector and a circuit board assembly. The electrical connector includes a plurality of pins configured to be electrically connected to the electronic device. The circuit board assembly is embedded inside the electrical connector and is electrically connected to one or more of the pins. The circuit board assembly includes a circuit board and an integrated circuit disposed on the circuit board.

Abstract: A parabolic antenna includes a main disc, a transmitting device, and a reflecting member. The main disc has a main surface that is arc-shaped. The transmitting device is disposed on the main disc and includes a transmitter and a reflector. The transmitter corresponds to the reflector. The reflector has a reflecting surface that is arc-shaped and corresponds to the main surface of the main disc. The reflecting member is detachably engaged with the reflecting surface of the reflector and corresponds to the transmitter. By engaging the reflecting member with the reflecting surface of the reflector or detaching the reflecting member from the reflecting surface, the parabolic antenna could form various configurations and provide different reflecting performances.

Abstract: A planar antenna module includes a plurality of planar antennas, a first transmission line electrically connected to the planar antennas, and at least one gain enhancement structure formed on the first transmission line. Each gain enhancement structure has a plurality of toothed portions spaced apart. With the design of the gain enhancement structure, the gain of the planar antenna module could be enhanced.

Abstract: A time synchronization device performs a time synchronization process with a device that provides first and second time values. The time synchronization device includes a packet processing circuit, a time counting circuit, and a processor. The packet processing circuit includes a timestamp counter having an N-bit length, and the packet processing circuit provides first to third time counting values. The processor calculates the first offset value based on the first and second time values and the first and second time counting values; calculates the first adjustment value based on the first offset value and the reciprocal of the frequency of the time counting circuit; calculates a second quotient value and a second remainder value based on the first adjustment value and the N-bit length; and calculates the receiving time of the second synchronization packet based on the N-bit length, the second quotient value, and the third time counting value.

Abstract: A network interface card installed in a chassis switch, which includes a switch device and a controller, is provided. The switch device includes a plurality of ports coupled to other network interface cards in the chassis switch, and each of the other network interface cards is a fabric card or a line card. The controller is configured to perform different acts according to the card type of the network interface card, wherein the acts constitute a specific process of path planning which may prevent loops from occurring in the communication paths of control packet delivery between multiple network interface cards in the chassis switch.

Abstract: A microstrip collinear array includes a bearing member, two first antenna assemblies, two second antenna assemblies, a first connecting line, and a second connecting line. The two first antenna assemblies are juxtaposed on the bearing member. Each of the first antenna assemblies includes several first planar antennas. The two second antenna assemblies are juxtaposed on the bearing member and are respectively and correspondingly located on an opposite side of the two first antenna assemblies. Each of the second antenna assemblies includes several second planar antennas. The first connecting line and the second connecting line are disposed on the bearing member. The second connecting line is located on an opposite side of the first connecting line and is electrically connected to the first connecting line. The first connecting line is electrically connected to the first antenna assemblies. The second connecting line is electrically connected to the second antenna assemblies.