Abstract: A dual band antenna is provided. The dual band antenna includes a grounding portion, a connecting portion, a feeding portion, a radiating portion, a first radiating portion and a second radiating portion. The connecting portion is vertically connected to the grounding portion. The feeding portion has a first end and a second end, wherein the first end is connected to the connecting portion and the second end has a feeding end. The radiating portion is parallel to the grounding portion and vertically connected to the connecting portion. The first radiating portion has a third end and a fourth end, wherein the third end is connected to the radiating portion and the fourth end extends toward the radiating portion. The second radiating portion is vertically connected to the radiating portion.

Abstract: A multi-band inverted-F antenna including a ground plane, a signal feeding circuit, first, second and third main radiation parts is provided. The signal feeding circuit is electrically isolated from the ground plane and receives/transmits wireless signals. The first and the second main radiation part are both physically and electrically connected to the signal feeding circuit, and generate first and second frequency band operation modes for the inverted-F antenna, respectively. The third main radiation part is electrically isolated from the signal feeding circuit, the first and the second main radiation parts, and generates a third frequency band operation mode for the inverted-F antenna via to signal coupling between the first and the third main radiation parts and/or signal coupling between the second and the third main radiation parts.

Abstract: A dual band antenna with improved radiation characteristic, comprising: a ground plane, formed at the bottom thereof; two impedance matching elements formed respectively at the two arms thereof while connecting to the ground plane so as to form a first joint and a second joint at the connections in respective; a first radiation unit, connected to the first joint, being formed like an arc connected to the first joint that is disposed concave to the bottom ground plane while extending from the first joint toward the second joint, and then turning vertically upward from the end of the arc for enabling the end of the vertical portion to connect to a second radiation unit; and the second radiation unit, being formed like an arc that is disposed concave to the bottom ground plane while extending from the joint with the first radiation unit toward the first joint.

Abstract: An antenna for receiving and transmitting a signal is provided. The antenna includes a connection portion receiving and transmitting the signal, a first radiation portion and a second radiation portion. The connection portion includes a first end, a second end and a third end, wherein the first end is configured at a first distance from a ground. The first radiation portion is connected to the second end, and includes at least one folding area forming thereon at least one folding segment, wherein the folding segment and the connection portion have therebetween a shortest distance being a second distance. The second radiation portion is connected to the third end.

Abstract: An antenna with electromagnetic interference (EMI) shelter is disclosed, which comprises: an EMI shelter, mounted on a substrate while covering the same; a radiation unit; an induction current steering unit, disposed at a position between the EMI shelter and the radiation unit; and a signal feed-in unit, electrically connected with the radiation unit; wherein, the induction current generated by the radiation unit when it is activating is guided to the EMI shelter through the guidance of the induction current steering unit, and then to be feed into a ground connection (GND), thereby, preventing the operation of radio circuit elements that are mounted on the substrate from being interfered by the electric wave resulting from the induction current. With the aforesaid configuration, not only the EMI effect can be significantly suppressed and the overall manufacturing cost of the antenna can be effectively reduced, but also the signal transmission efficiency is improved.

Abstract: An antenna is disclosed, which comprises: a substrate with a first surface and a second surface; a first radiation unit, disposed on the first surface; an insulating unit, disposed on the first surface on top of the first radiation unit; a first feed point, formed on the second surface and electrically connected to the first radiation unit; a grounding unit, disposed coplanar and connected with the first radiation unit; a first gap, formed between the first radiation unit and the grounding unit; and a second feed point, formed on the second surface and electrically connected to the grounding unit; wherein, as the second surface with the two feed points disposed thereon is adjacent to at least a metallic component and the radiation units are disposed on the first surface, the radiation units do not directly face the metallic component and thus prevent the same from being interfered by metallic shielding.

Abstract: A method for adjusting an operation bandwidth of an antenna is provided. The antenna includes a radiation element, and the radiation element includes a first adjusting portion having a first width and a second adjusting portion having a second width. The method includes steps of seeking an operation frequency of the antenna; and adjusting the operation bandwidth of the antenna by adjusting the second width based on the operation frequency.

Abstract: A single band antenna includes a radiating part, a feeding part and a grounding part. The feeding part is connected with the radiating part. A first separating slot exists between the radiating part and the feeding part. The grounding part is connected with the feeding part. A second separating slot exists between the feeding part and the grounding part. Each of the first separating slot and second separating slot has at least one bend.

Abstract: An over-current protection device comprises two metal foils, a positive temperature coefficient (PTC) material layer and a packaging material layer. The PTC material layer is sandwiched between the two metal foils and has a volume resistivity below 0.1 ?-cm. The PTC material layer includes (i) plural crystalline polymers having at least one crystalline polymer with a melting point less than 115° C.; (ii) an electrically conductive nickel filler having a volume resistivity less than 500 ??-cm; and (iii) a non-conductive metal nitride filler. The electrically conductive nickel filler and non-conductive metal nitride filler are dispersed in the crystalline polymer. The packaging material layer which encapsulates the chip is essentially comprised of the PTC layer and the two metal foils. The packaging material layer is formed by reacting epoxy resin with a hardener having amide functional group.

Abstract: An over-current protection device comprises two metal foils and a positive temperature coefficient (PTC) material layer. The PTC material layer is sandwiched between the two metal foils and has a volume resistivity below 0.1 ?-cm. The PTC material layer includes (i) plural crystalline polymers having at least one crystalline polymer of a melting point less than 115° C.; (ii) an electrically conductive nickel filler having a volume resistivity less than 500 ??-cm; and (iii) a non-conductive metal nitride filler. The electrically conductive nickel filler and non-conductive metal nitride filler are dispersed in the crystalline polymer.

Abstract: An antenna interacting with a signal having a frequency is provided. The antenna includes a radiation element having a hollow portion having an angle corner related to the frequency, and including a first inner edge; a second inner edge, wherein the angle corner is formed by the first inner edge and the second inner edge; a third inner edge connected to the second inner edge; a first outer edge; and a second outer edge, wherein the first outer edge and the second outer edge form a first included angle.

Abstract: A dual-band antenna is disposed on a substrate having an antenna-mounted surface. The dual-band antenna includes a first radiating unit, a second radiating unit, and a feeding terminal. The first radiating unit is disposed opposite to the antenna-mounted surface of the substrate, and at least has a first side, a second side and, a third side. The first side is opposite to the third side, and the length of the first side is not equal to that of the third side. The second side is connected to the first side and the third side. The second radiating unit is connected to the first side of the first radiating unit. The feeding terminal is connected to the third side of the first radiating unit and the antenna-mounted surface of the substrate.

Abstract: A wireless communication apparatus and a planar antenna thereof are provided. The wireless communication apparatus comprises a connecting port, a printed circuit board, and a planar antenna. The printed circuit board is connected to the connecting port, and the planar antenna is formed on the printed circuit board. The planar antenna comprises a radiation portion, a shorting portion, and a feeding portion. The feeding portion is connected to the radiation portion and the shorting portion, and the radiation portion and the shorting portion are in a bent shape so that the radiation portion, the shorting portion and the feeding portion are distributed in a rectangular region.

Abstract: An over-current protection device comprises two metal foils, a positive temperature coefficient (PTC) material layer and a packaging material layer. The PTC material layer is sandwiched between the two metal foils and has a volume resistivity below 0.1 ?-cm. The PTC material layer includes (i) plural crystalline polymers having at least one crystalline polymer with a melting point less than 115° C.; (ii) an electrically conductive nickel filler having a volume resistivity less than 500 ??-cm; and (iii) a non-conductive metal nitride filler. The electrically conductive nickel filler and non-conductive metal nitride filler are dispersed in the crystalline polymer. The packaging material layer which encapsulates the chip is essentially comprised of the PTC layer and the two metal foils. The packaging material layer is formed by reacting epoxy resin with a hardener having amide functional group.

Abstract: A wireless network receiver includes a circuit board and a connector structure. The connector structure is fixed on the circuit board, and the connector structure includes a connector and an antenna. The antenna, crossing the circuit board, and the connector are integrally formed with as a whole. The antenna includes a feeding connecting member, a horizontal radiator, a vertical radiator and a grounding connecting member. The horizontal radiator generates a horizontally polarized wave and is connected to the feeding connecting member. The vertical radiator generates a vertically polarized wave and is connected to the horizontal radiator. The grounding connecting member connects the horizontal radiator to the connector.

Abstract: Provided is a miniature three-dimensional antenna. The subject matter is particularly a miniature, low-height, and three-dimensional structure single-frequency antenna. In accordance with the preferred embodiment, the antenna includes a radiation member with extended structure, and the radiation member has a first radiation plane and a non-coplanar second radiation plane. One end extended from the first radiation plane forms a radiation bent member by a bending process. Furthermore, the antenna includes a feed member and a ground member which are the structure extended from the radiation member. In particularly, the first radiation plane, the second radiation plane, the radiation bent member, the feed member, and ground member are not coplanar. The three-dimensional structure is featured to provide the low-height structure, and fortify the antenna structure. Moreover, it is easy to apply to significant number of applications through adjustment of members.

Abstract: The present invention discloses a dual-band antenna integrated with GSM wireless communication apparatuses, comprising: a first radiation unit; a first connecting portion; a second radiation unit; a second connecting portion; a grounding unit; a grounding extension unit; a signal feed-in terminal; and a signal grounding terminal. Therefore, the dual-band antenna integrated with GSM wireless communication apparatuses of the present invention has a broad effective operating band to significantly enhance the transceiving performance.

Abstract: An over-current protection device comprises two metal foils and a positive temperature coefficient (PTC) material layer. The PTC material layer is sandwiched between the two metal foils and has a volume resistivity below 0.1 ?-cm. The PTC material layer includes (i) plural crystalline polymers having at least one crystalline polymer of a melting point less than 115° C.; (ii) an electrically conductive nickel filler having a volume resistivity less than 500 ??-cm; and (iii) a non-conductive metal nitride filler. The electrically conductive nickel filler and non-conductive metal nitride filler are dispersed in the crystalline polymer.

Abstract: A dual band antenna includes a grounding portion, a connection portion, a radiating portion, a radiating groove and a feeding portion. The connection portion has a top side and a bottom side disposed relatively, and has a first edge side and a second edge side connected to the top side and the bottom side. The bottom side of the connecting portion is connected with the grounding portion. The radiation portion is protruded from the first edge side of the connecting portion and neighboring to the top side of the connecting portion. The radiation groove is disposed on the inside of the connecting portion and neighboring to the second edge side and bottom side of the connecting portion, and has a opening located on the first edge side of the connecting portion. The feeding portion is formed on the connecting portion and neighboring to the opening of the radiation groove.

Abstract: An antenna connected to an interface connection port is provided. The antenna comprises a ground surface having a plurality of bands thereon; a first radiation element disposed on the ground surface and including a first bending section and a second bending section, wherein the ground surface is extended from the first bending section; and a second radiation element having a shape of a strip, extended from the second bending section, including a first end and a second end, and having a first flange at the first end and a second flange at the second end.