Abstract: An antenna structure includes a first tubing module, a second tubing module, an insulating tubing, a coaxial cable, an insulating tube and a base. Both ends of the insulating tubing are connected with the first and second tubing modules respectively. An interval is maintained between two corresponding ends connected with the tubing modules. The first tubing module is connected to the insulating tube, and the insulating tube is connected the base. The coaxial cable includes a central conductor and a metal conducting mesh, and the central conductor is connected the second tubing module, and the second tubing module is connected to a terminal inside the base. The metal conducting mesh is connected to the first tubing module, and the first tubing module is connected the base, so that the antenna structure can be operated at a specific frequency range and gives a better gain.

Abstract: The present invention is to provide a connector, which includes a casing; a first signal transmitting unit having a portion protruded from the casing and another portion extended into the casing; a second signal transmitting unit disposed in the casing and electrically coupled to the first signal transmitting unit; a third signal transmitting unit movably installed in the casing and having a portion insulatedly coupled to the second signal transmitting unit. If a portion of the third signal transmitting unit is pushed, the second signal transmitting unit will electrically disconnect the first signal transmitting unit, and another portion of the third signal transmitting unit will electrically connect the second signal transmitting unit.

Abstract: An attenuator includes a main body and a circuit board module, wherein the main body is made of an electrically conducting metal, and an installing portion is concavely disposed between both ends of the main body, and a portion of the circuit board module is disposed on the installing portion for reducing the contact area between the circuit board module and the main body, so as to lower the parasite capacitance of the attenuator between the circuit board module and the main body, and the circuit board module processes a signal introduced by the main body according to a predetermined attenuation.