Abstract: A multi-band antenna structure includes a substrate having a first surface and a second surface that is opposite to the first surface, a first metal strip and a second metal strip formed on the first surface, a third metal strip formed on the second surface, and a metal part located on the substrate. The first metal strip has a first strip and a second strip and the second strip has an inductance characteristic. The first strip of the first metal strip and the third metal strip define a first overlap area in the direction vertical to the substrate. The first overlap area has a first capacitor characteristic. The second metal strip and the third metal strip define a second overlap area in the direction vertical to the substrate. The second overlap area has a second capacitor characteristic.

Abstract: A multi-band antenna includes an insulative carrier board arranged on the top side of the display screen of a notebook computer, a main antenna which has the top metal strip thereof disposed at the top edge of the insulative carrier board and the grounding metal strip thereon arranged on the insulative carrier board, an inverted L antenna arranged on the insulative carrier board, a first capacitor, a second capacitor, an antenna feed-in terminal and/or an inductor set between the inverted L antenna and the main antenna to achieve optimal matching subject to adjustment of the capacitance values of the first and second capacitors and the inductance value and position of the inductor.

Abstract: In an antenna structure having an effect of serially connecting capacitances, mainly a metallic planar antenna is provided thereon at least with a first metallic plane board, and a second metallic plane board being close to but not connected to the first metallic plane board to form the effect of serially connecting capacitances. And more, the antenna structure further has an extension arm extended from the antenna or the second metallic plane board made from a microstrip, and can be optionally grounded or not grounded, for the purpose of adjusting the impedance value of the antenna structure.

Abstract: In an antenna structure having an effect of capacitance in serial connecting, mainly a metallic planar antenna is provided thereon at least with a first metallic plane board, and a second metallic plane board being close to but not connected to the first metallic plane board to form the effect of capacitance in serial connecting. And more, the antenna structure further has an extension arm made from a microstrip extended from the antenna or the second metallic plane board, and can be optionally grounded or not grounded, for the purpose of adjusting the impedance value of the antenna structure.

Abstract: A loop antenna used in a cell phone having a circuit board and a casing housing the circuit board is disclosed to include a loop extending around the border of the circuit board, a ground end extending from one end of the loop and electrically connected to a ground plane of the circuit board, a feed end extending from the opposite end of the loop and electrically connected to the circuit board for signal input, and two cut-off ends formed in a middle part of the loop to cut off the loop. The two cut-off ends are electrically connected to the casing of the cell phone if the casing is a metallic casing, or short-circuited if the casing of the cell phone is a non-metallic casing.

Abstract: An antenna mounting arrangement for a cell phone having a plastic bottom shell, a metal front cover and a printed circuit board with a ground plane set in between the plastic bottom shell and the metal front cover metal is disclosed to have the ground pin of the antenna be electrically connected to the ground plane of the printed circuit board and the metal front cover of the cell phone to change the direction of electric current through the antenna and to further change the distribution of the magnetic field of the cell phone for increasing the antenna efficiency.

Abstract: A stacked monopole antenna for broadband communication equipment, the antenna is provided with a plurality of component sheets arranged from bottom to top, a gap for adjusting impedance matching is provided between every two component sheets, and the component sheets form centrally thereof an integral connecting neck, a feed-in line is provided on the bottom of the antenna; the component sheets get its desired broad bandwidth by adjusting the height stacked by said component sheets.

Abstract: A micro stacked type chip antenna, wherein a plurality of elementary layers printed with radiation metallic electrodes are stacked up to allow the radiation metallic electrodes on the elementary layers to electrically connect each with its neighboring ones (one) of the radiation metallic electrodes on its upper one and/or lower one of the elementary layers; and then these elementary layers stacked up are packed in a packing process, a plurality of connecting pins are connected respectively with the radiation metallic electrodes on different elementary layers, the tailing end of each connecting pin is extended out of a packing envelop; by various options of connecting of the connecting pins, resonant frequencies of different band widths can be obtained.

Abstract: A broadband antenna framework used for receiving and emitting radio signals for a mobile communication device (such as a mobile phone). The mobile communication device is provided on an upper edge of its circuit board (having a grounding surface) with an antenna, and is provided between the antenna and the circuit board with a meandering line; the meandering line is provided thereon with components containing multilayer ceramic capacitors (MLCC) or multilayer ceramic inductors (MLCI); by using the capacitors or the inductors, the coupling effect between the grounding surface and the antenna can be insulated, so that there can be sufficient distance between the grounding surface and the antenna to radiate energy, the capacitors or the inductors do not result a direct current open circuit, hence other electronic elements can be laid around an antenna.

Abstract: A micro stacked type chip antenna, wherein a plurality of elementary layers printed with radiation metallic electrodes are stacked up to allow the radiation metallic electrodes on the elementary layers to electrically connect each with its neighboring ones (one) of the radiation metallic electrodes on its upper one and/or lower one of the elementary layers; and then these elementary layers stacked up are packed in a packing process, a plurality of connecting pins are connected respectively with the radiation metallic electrodes on different elementary layers, the tailing end of each connecting pin is extended out of a packing envelop; by various options of connecting of the connecting pins, resonant frequencies of different band widths can be obtained.

Abstract: An active digital TV antenna, the antenna mainly has a planar antenna and a variable capacitor connected to the planar antenna; the variable capacitor is used to adjust a capacitance value and an inductance value of the planar antenna to change the range of frequency band of a signal received by the planar antenna. Therefore, the entire volume of the antenna can be reduced to be suitable for applying in an active electronic machine such as a notebook or a mobile phone.

Abstract: A stacked monopole antenna for broadband communication equipment, the antenna is provided with a plurality of component sheets arranged from bottom to top, a gap for adjusting impedance matching is provided between every two component sheets, and the component sheets form centrally thereof an integral connecting neck, a feed-in line is provided on the bottom of the antenna; the component sheets get its desired broad bandwidth by adjusting the height stacked by said component sheets.

Abstract: An improved structure of a multi-frequency antenna for a mobile phone, the antenna is placed in an inner insulation sleeve to position a coil in cooperation with a receiving seat and is provided with a contact piece connected with one end thereof to the lower portion of the receiving seat and exposed partially to the outside; an outer sleeve is adapted for slipping over the inner insulation sleeve having been assembled with internal members, to make one end of the coil abut against the inner top surface of the outer sleeve, and the bottom end of the coil abut against the surface of the receiving seat; the coil includes in its length a sparse coil section and a dense coil section, the coil forms a multi-frequency antenna together with the receiving seat and the contact piece. The present invention can render manufacturing of multi-frequency antennae fast and convenient under the condition of using the improvement in the known antenna structure and known processing procedure of assembling.

Abstract: A stretchable antenna for mobile phones including a fixed axle sleeve embedded in antecedent therein a fixed coil antenna, the axle sleeve forms requisite electric connection with the mobile phone on the body top of the latter, an antenna rod is freely moved to and fro in the axle sleeve and has on the top thereof an insulation end which is combined with a metallic end piece, a coil antenna is provided on the end piece, a metallic annular piece is provided beneath the metallic end piece; the shank of the antenna rod, the end piece, the annular piece and the coil antenna are enveloped with a coating by and positioned in injection molding, the bottom of the antenna rod connects a metallic sleeve; when the coil antenna is stretched, the end piece abuts on the annular piece to render the coil antenna to contact the antenna rod directly to form electric connection, when the antenna rod is retracted, extension of the antenna rod is limited by an abutting point to force the end piece to separate from the annular pie