Abstract: A device and method are disclosed for protecting a wireless communication system from impulse surges occurring in the system under the impact of lightning discharges. The device includes a high frequency line, and a first decoupling filter formed as a ?/4 section and a gas arrestor, sequentially connected to the high frequency line, in which the gas arrestor is connected between the first decoupling filter and the ground. A low frequency line and a second decoupling filter are connected in series between an output terminal, through which a signal flows into a circuit, and a contact point between the first decoupling filter and the gas arrestor. The low frequency line includes a low voltage limiter and a low pass filter. A T-shaped high pass filer is connected to the high frequency line.

Abstract: A device and method are disclosed for protecting a wireless communication system from impulse surges occurring in the system under the impact of lightning discharges. The device includes a high frequency line, and a first decoupling filter formed as a &lgr;/4 section and a gas arrestor, sequentially connected to the high frequency line, in which the gas arrestor is connected between the first decoupling filter and the ground. A low frequency line and a second decoupling filter are connected in series between an output terminal, through which a signal flows into a circuit, and a contact point between the first decoupling filter and the gas arrestor. The low frequency line includes a low voltage limiter and a low pass filter. A T-shaped high pass filer is connected to the high frequency line.

Abstract: A tape feeder for a part mounter including a guide frame into which first through third guide portions and a stripper are incorporated, a driving motor installed on the rear surface of the guide frame, first through third gears for transmitting the power of the driving motor, a sprocket coaxially installed on the third gear, the sprocket having teeth formed on the outer circumferential surface to be inserted into grooves formed on the tape having parts attached thereto and a plurality of slots formed along the circumference of the sprocket, a cover take-up apparatus assembly having a first pulley installed on one gear among the first and second gears, a belt hung on the first pulley, a second pulley which rotates by a driving force transmitted via the belt, and a take-up reel installed coaxially with respect to the second pulley, a cover tension apparatus assembly having an axle gear interlocked with the third gear, a peel roller which is installed coaxially with the axle gear and rotates, and a pinch roller