Abstract: A multi-band antenna (1) used in wireless communications includes a radiating portion (2), a grounding portion (4), and a connecting portion (3). The radiating portion (2) includes a first radiating element (21) operating at 900 MHz frequency band and a second radiating element (22) operating at 1800 MHz frequency band. The connecting portion (3) connects the radiating portion (2) and the grounding portion (4). The grounding portion (4), the radiating portion (2), and the connecting portion (3) locate in the same plane.

Abstract: A complex antenna adapted for used in a electronic device, comprises a rod antenna, a helical antenna, a dipole antenna comprising a radiating element and a grounding element, and a feeding line. The feeding line comprises an inner conductor electrically connecting to the radiating element at a first joint position and an outer conductor electrically connecting to the grounding element at a second joint position. The first joint position is tightly covered by a insulating tubular element for avoiding to be destroyed and oxidized.

Abstract: A multi-band antenna includes a radiating element comprising a first metal patch, a second metal patch extending along a direction different from the first metal patch, a grounding element parallel to the radiating element with a certain distance, a resonant cavity produced by said certain distance between separated the radiating element and the grounding element, a first pad downward extending from an edge of the first metal patch to form a feeding pad, and a second pad downward extending from an edge of the second metal patch to form a grounding pad; wherein the edge from which the first pad extending is bordering the edge of the second metal patch with the second pad.

Abstract: A multi-band antenna used in a portable electrical device can work in WWAN and GPS at the same time. The multi-band antenna includes a PCB having a through hole, a first antenna body comprising a first radiating element and a first grounding element formed on a first surface of the PCB, a second antenna body formed on a second surface of the PCB, and a feeding line having an inner conductor electrically connecting to the first radiating element and an outer conductor electrically connecting to the first grounding element. The second antenna body comprises a second radiating element, a second grounding element, and a connecting element connecting the second radiating element and the second grounding element. The first radiating element and the second radiating element electrically connect with each other via the through hole of the PCB.

Abstract: An inverted-F antenna (1) used in a portable electrical device formed in a metal patch and includes a radiating element (2), a grounding element (5), and an impedance matching element (3) with an impedance matching space (8). The impedance matching element (3) connects the radiating element (2) and the grounding element (5). A metal foil (7) locates in the impedance matching space and connects to the impedance matching element (3) for modulating impedance matching of the inverted-F antenna. A feeding line (4) includes an inner conductor (40) soldered with the impedance element (3) and a braiding layer (41) soldered with the grounding element (5).

Abstract: A multi-band antenna includes a first antenna operating at wireless wide area network and having a first radiating arm, a second antenna operating at wireless local area network and a grounding portion employed by the first antenna and the second antenna. Wherein the first radiating arm of the first antenna further includes a metallic sheet, an insulative member affixed to the metallic sheet and a metal foil affixed to the insulative member.

Abstract: A frequency modulating equipment (20) for being used in an antenna (10) for modulating frequency of the antenna (10) to achieve a desired operating frequency, comprises a slide block (30) attached to a radiating element (11) of the antenna (10) and being capable of moving freely and a plastic element (21). The slide block (30) comprises a contact portion (300) contacting a free end of the radiating element (11) of the antenna (10). The plastic element (21) is fixed onto the antenna (10). The slide block (30) is installed on the plastic element (21). The antenna (10) can achieve a desired operating frequency by moving the modulating befittingly the slide block (30).

Abstract: An inverted-F antenna (1) used in a portable electrical device formed in a metal patch and includes a radiating element (2), a grounding element (5), and an impedance matching element (3) with an impedance matching space (8). The impedance matching element (3) connects the radiating element (2) and the grounding element (5). A metal foil (7) locates in the impedance matching space and connects to the impedance matching element (3) for modulating impedance matching of the inverted-F antenna. A feeding line (4) includes an inner conductor (40) soldered with the impedance element (3) and a braiding layer (41) soldered with the grounding element (5).

Abstract: A multi-band antenna used in an electronic device, comprising: a grounding element; a radiating element comprises a first radiating section operating at 900 MHz frequency band and a second radiating section operating at 1800 MHz frequency band; and a connecting section connecting the radiating element and the grounding element. The grounding element, the radiating element, and the connecting element locate respectively in the different plane. The whole structure of the multi-band antenna of the present invention designed combining the inner structure of the notebook or other portable electrical device. The multi-band antenna is suit to be installed in a notebook or other portable electrical device because the multi-band antenna occupies small space.

Abstract: A multi-band antenna (1) used in wireless communications includes a radiating portion (2), a grounding portion (4), and a connecting portion (3). The radiating portion (2) includes a first radiating element (21) operating at 900 MHz frequency band and a second radiating element (22) operating at 1800 MHz frequency band. The connecting portion (3) connects the radiating portion (2) and the grounding portion (4). The grounding portion (4), the radiating portion (2), and the connecting portion (3) locate in the same plane.