Abstract: Disclosed herein is an embedded chip antenna. The embedded chip antenna having a complementary radiator structure includes two radiators that have identical radiation characteristics and are respectively arranged on both sides of a feed point. According to the present invention, the radiator of a chip antenna has a single physical radiator structure, but is electrically formed of a plurality of partial radiators symmetrical with respect to a feed point, and radiation operations in high and low frequency bands are separately performed. Therefore, complementary operational characteristics that counteract external effects are implemented, so that, when part of a human body, such as the hand, affects one partial radiator on one side of the chip antenna, the other partial radiator on the other side thereof independently operates, thereby minimizing performance degradation originating from the outside of the antenna.

Abstract: A wideband built-in antenna in a portable terminal includes a ground plate electrically connected to a ground of the portable terminal, a radiation element for radiating radio waves, wherein the radiation element is formed into a zigzag shape having a predetermined thickness and width in parallel with the ground plate, a feeding point for feeding signals into the radiation element, a feeding probe connecting the feeding point to the radiation element and a holder for fixing the antenna to the portable terminal.

Abstract: A plasma polymerizing system including at least one chamber is disclosed. After polymerizing a surface of a sheet by generating plasma of reactive gas in the chamber, mixed gas of oxygen and nitrogen is provided into the chamber for preventing the deterioration of the polymerizing property of the sheet. Air can be provided for the mixed gas.

Abstract: Disclosed is a wideband directional antenna in a wireless communication service, comprising at least one radiation element, wherein the radiation element includes at least one loop, wherein one feeding point of the loop is connected to feeder and the other feeding point is connected to a ground distributor.

Abstract: A multi-band patch antenna includes a feeding unit for feeding signals, a skeleton slot radiation element for radiating radio waves, wherein the skeleton slot radiation element includes a feeding point connected to the feeding unit, first conductive loops symmetrically formed with the feeding point in the center and second conductive loops formed at the both sides of the first loops, and a reflector for reflecting backward radiation waves of the skeleton slot radiation element.

Abstract: A wideband built-in antenna in a portable terminal includes a ground plate electrically connected to a ground of the portable terminal, a radiation element for radiating radio waves, wherein the radiation element is formed into a zigzag shape having a predetermined thickness and width in parallel with the ground plate, a feeding point for feeding signals into the radiation element, a feeding probe connecting the feeding point to the radiation element and a holder for fixing the antenna to the portable terminal.

Abstract: Dual band retractable antenna system with capacitive coupling includes a helical antenna for operating at stand-by mode, the helical having ¼ wavelength; a whip, which penetrates the helical, for operating at busy mode, the whip having ¼ wavelength; a stopper for catching the whip when the antenna is extended out; a sleeve mounted to one end of the helical, for operating as a feed point when the whip is extended out; a capacitive coupling arrangement placed between the helical and the sleeve, for capacitively coupling the helical to the sleeve; and a matching circuit connected between the sleeve and the antenna system, so that the antenna system operates for both frequency bands.