Abstract: An antenna includes a radiating element with a shape substantially conforming to a quadrilateral, a grounding and feed-in element, substantially surrounding the radiating element and having an opening formed near to a fourth side of the radiating element, wherein the grounding and feed-in element is electrically connected to a ground at one side of the opening and is electrically connected to a signal feed-in terminal at another side of the opening, a first connection element, having a terminal electrically connected to a first side and the fourth side of the radiating element, and another terminal electrically connected to the grounding and feed-in element, and a second connection element, having a terminal electrically connected to a third side and the fourth side of the radiating element, and another terminal electrically connected to the grounding and feed-in element.

Abstract: In combination, an RFID antenna array, an RFID tag reader, and a power supply, the foregoing components being adapted to be worn or otherwise borne by a person and be operatively connected so that the power supply powers the reader and the reader energizes the antenna array and receives RFID tag signals through the antenna array while the person passes through an area as the person's hands and arms are unencumbered by said components.

Abstract: A bridging mechanism, for connecting a supporting tube and a holder, includes at least one positioning portion, a bridging member, a connecting member, a handle and at least one positioning structure. The at least one positioning portion is formed on the supporting tube. The bridging member is used for bridging the supporting tube. The connecting member extends from the bridging member for connecting the holder. The handle is pivoted to the bridging member for rotably pressing the supporting tube when the supporting tube is bridged to the bridging member, so as to abut the supporting tube against the bridging member. The at least one positioning structure is formed on the handle. The at least one positioning structure simultaneously rotates with the handle for wedging with the at least one positioning portion when the handle rotates to press the supporting tube to position the bridging member on the supporting tube.

Abstract: A waterproof part for a feedhorn includes a first waterproof unit having a first interface for generating a first reflected wave and a first transmitted wave when a satellite signal incidents the first interface, and a second waterproof unit covering on the first waterproof unit and having a second interface for generating a second reflected wave and a second transmitted wave when the first transmitted wave incidents the second interface, wherein the first and second reflected waves are substantially out-of-phase to substantially cancel the first and second reflected waves.

Abstract: An antenna device utilized in a wireless communication device having a lid, a chassis and a hinge is disclosed. The antenna device includes a radiating module disposed in the lid or the hinge and moving in response to movement of the lid, for transmitting or receiving radio-frequency signals; and a metal barricade disposed in an area apart from the radiating module by a specified distance on the chassis.

Abstract: A three-dimensional antenna includes an L-shaped grounding element and an L-shaped radiating element. The grounding and radiating elements are arranged in a U shape. The grounding element includes a first grounding segment, a second grounding segment extending from the first grounding segment, and a short-circuit point disposed at the second grounding segment. The radiating element includes a first radiating segment opposite to the first grounding segment, a second radiating segment extending from the first radiating segment and adjacent to the second grounding segment, a feeding point disposed at the second radiating segment, and two radiator arms being able to generate respective resonant frequencies.

Abstract: A beamwidth adjustment device, which is used for a feedhorn comprising an opening and a ring encircling the opening, comprises a conductor used for adjusting beamwidth formed by the feedhorn according to a characteristic of a dish of a satellite antenna corresponding to the feedhorn, and a fixing element used for fixing the conductor to the feedhorn, wherein the satellite antenna is used for receiving signals from the feedhorn.

Abstract: A radar system comprises a transmitting device comprising a reference frequency source, for generating a reference frequency signal; a direct-digital synthesizer, coupled to the reference frequency source, for generating a synthesized frequency signal according to the reference frequency signal; a phase lock loop, coupled to the direct-digital synthesizer, for converting the synthesized frequency signal to an output signal; a transmitting antenna, coupled to the phase lock loop, for emitting the output signal to the air; and a loop switch module, coupled to the phase lock loop, for switching the phase lock loop between an open loop mode and a closed loop mode; and at least one receiving device, for receiving at least one wireless signal, and processing the at least one wireless signal according to the output signal generated by the phase lock loop.

Abstract: An adjusting mechanism includes a supporter, a foundation and a clamper. The supporter includes a base, and a supporting component pivotably disposed on the base along a first axial direction. An open hole is formed on a bottom of the base, and the base includes a fixing portion. The foundation is pivotably disposed on the base. A conjunction portion is disposed on a surface of the foundation, and the fixing portion is connected to the conjunction portion for preventing the base from rotating relative to the foundation. The clamper is fixed on the foundation for piercing through the open hole and partly positioning between the base and the supporting component. The clamper includes a body for clamping a tube, and two connecting parts disposed on a lateral surface of the body. A direction of each connecting part is parallel to a second axial direction perpendicular to the first axial direction.

Abstract: A test device for wireless electronic devices includes a metal casing, a RF-absorbing material, a measurement antenna, and an impedance adjustment module. The impedance adjustment module includes a dielectric layer, a microstrip line, and a slot line, wherein the slot line is electrically connected to the measurement antenna. The microstrip line and the slot line are disposed on two opposite sides of the dielectric layer and respectively include a first body and a second body, which are parallel to each other.

Abstract: An unsymmetrical dipole antenna includes a grounding element, a radiating element, and a feed-in wire. The grounding element includes a first short side metal plane and a first long side metal plane. The radiating element includes a second short side metal plane and a second long side metal plane. The feed-in wire includes a metal wire, coupled to the second short side metal plane for transmitting a feed-in signal; an insulation layer, covering the metal wire; a metal weave, covering the insulation layer, having one terminal coupled to the first short side metal plane of the grounding element, and another terminal coupled to a system ground of the wireless communication device; and a protective layer, covering the metal weave. A size of the grounding element and a size of the radiating element are irrelative.

Abstract: A smart meter capable of performing wireless transmission is used to show some power information, in which the smart meter includes an inner cylindrical case, a ring layer, an inner-layer antenna, and an outer-layer antenna. The interior of the inner cylindrical case is hollow. The ring layer surrounds the inner cylindrical case. The inner-layer antenna is attached to the ring layer and slides on the ring layer. The outer-layer antenna is also attached to the ring layer and overlaps as well as contacts with the inner-layer antenna. The inner-layer antenna and the outer-layer antenna are driven to adjust a total length of them in order to receive signals of different frequency bands.

Abstract: A method for controlling an antenna is provided. The antenna can rotate in a signal area and point to one of a plurality of scanning sectors of the signal area. The method includes: (a) measuring an environment identification data in an initial scanning sector of the scanning sectors and determining if the environment identification data matches an operation identification data; (b) if the environment identification data matches the operation identification data, measuring an environment evaluation signal, wherein the environment evaluation signal corresponds to the environment identification data; (c) comparing the environment evaluation signal with an operation evaluation signal, wherein the operation identification data corresponds to the operation evaluation signal; and (d) maintaining the antenna in the initial scanning sector and recording the environment evaluation signal if the environment evaluation signal is larger than or equal to the operation evaluation signal.

Abstract: An optical low-noise block down-converter for a satellite television system is disclosed. The optical low-noise block down-converter includes a first down-conversion module coupled to a satellite antenna of the satellite television system for converting a vertically polarized signal received by the satellite antenna into a first intermediate frequency signal, a second down-conversion module coupled to the satellite antenna for converting a horizontally polarized signal received by the satellite antenna into a second intermediate frequency signal, and a third down-conversion module having a first input terminal coupled between the satellite antenna and a first down-converter of the first down-conversion module and a second input terminal coupled between the satellite antenna and a second down-converter of the second down-conversion module for draining out part of the vertically polarized signal and the horizontally polarized signal to combine and convert into a legacy electrical signal.

Abstract: A method for manufacturing an antenna structure is disclosed. Employing steps of mixing with a catalyst and embedding a metal insert can simplify steps for manufacturing the antenna structure. Further, a non-conductive frame produced by the process disclosed herein can exhibit waterproof effect. The catalyst mentioned above is mixed with a plastic and then injected into a mold to form the non-conductive frame. The metal insert mentioned above is disposed in the mold before the step of injecting the plastic. Alternatively, the metal insert is embedded in the non-conductive frame after the step of injecting the plastic.

Abstract: A power divider for transmitting signals of an input terminal to a plurality of output terminals includes a rectangular microstrip line coupled to the input terminal, and a plurality of coupling units conducting the rectangular microstrip line and the plurality of output terminals by electromagnetic coupling, wherein each of the plurality of coupling units and the rectangular microstrip line are separated by a first gap, and each coupling unit includes at least one dual-L resonator disposed between the microstrip line and an output terminal, wherein the first gap and a second gap of each dual-L resonator are related to a power ratio between the input terminal and the plurality of output terminals.

Abstract: The present invention discloses an antenna system for a wireless communication device, which includes a first metal slice formed with a first slot structure, a second metal slice formed with a second slot structure, a first signal transmission line, and a second signal transmission line, wherein when the first metal slice and the second metal slice are not connected and have a distance between each other, a feeding direction of the first transmission corresponding to the first metal slice is substantially opposite to a feeding direction of the second transmission corresponding to the second metal slice; or when the first metal slice and the second metal slice are partially connected, a feeding direction of the first transmission corresponding to the first metal slice is substantially the same as or different to a feeding direction of the second transmission corresponding to the second metal slice.

Abstract: A wireless communication device includes a diversity antenna operating in a receiving frequency band to receive a receiving signal in the reception frequency band, a tunable matching circuit for adjusting a matching of the diversity antenna according to a control signal, a detection circuit for detecting a wireless communication system corresponding to the receiving signal to generate a detection result, wherein the detection result indicates an antenna configuration and a transmission frequency band corresponding to the wireless communication system, and a radio-frequency processing circuit for determining whether to adjust the matching of the diversity antenna to weaken antenna performance of the diversity antenna in both or one of the transmission frequency band and the reception frequency band according to the antenna configuration so as to improve an isolation between the diversity antenna and a main antenna.

Abstract: A wireless communication device includes an antenna for receiving a receiving signal and including a radiator whose input impedance is inductively centralized, a tunable matching circuit coupled to the antenna for adjusting a matching of the antenna according to a control signal, and a radio-frequency processing circuit coupled to the tunable matching circuit, for determining whether to adjust the matching of the antenna according to a receiving band and a transmitting band corresponding to the receiving signal to generate the control signal to the tunable matching circuit, wherein the tunable matching circuit adjusts the matching of the antenna to optimize the matching of the antenna in the receiving band and the transmitting band.

Abstract: A waterproof part for a feedhorn includes a first waterproof unit having a first interface for generating a first reflected wave and a first transmitted wave when a satellite signal incidents the first interface, and a second waterproof unit covering on the first waterproof unit and having a second interface for generating a second reflected wave and a second transmitted wave when the first transmitted wave incidents the second interface, wherein the first and second reflected waves are substantially out-of-phase to substantially cancel the first and second reflected waves.