Abstract: A Multiple-Input-Multiple-Output (MIMO) antenna device is adapted for connecting electrically to a radio frequency (RF) circuit for transmitting and receiving RF signals . The MIMO antenna device includes a circuit board, a plurality of antenna units, and a plurality of multiplexer units. The antenna units are disposed on the circuit board proximate to a peripheral edge thereof, are arranged in a loop formation, and are divided into a plurality of groups of the antenna units . Each of the multiplexer units is connected electrically to a respective one of the groups of the antenna units for selecting one of the corresponding antenna units and for connecting electrically the selected one of the corresponding antenna units to the RF circuit, thereby achieving the MIMO technique with the independently and simultaneously operating antenna units.

Abstract: A multi-loop antenna system includes: a plurality of loop antennas disposed on a substrate and arranged such that each of extending lines extending respectively from geometric centers of the loop antennas to a center point that is bounded by the loop antennas has a predetermined length, and that each of the loop antennas is spaced apart from an adjacent one of the same by a predetermined distance; and a system module facing toward and being spaced apart from and parallel to the substrate such that the grounding plane is able to reflect radiation from the loop antennas. Each of the loop antennas includes first and second radiator portions operable in respective frequency bands; the former having opposite ends that respectively serve as signal-feed and grounding sections; the latter having opposite ends that are connected respectively to the signal-feed and grounding sections.

Abstract: The hybrid multiple-input multiple-output antenna module includes a grounding unit, a plurality of radiating units, loop units and filter units. The radiating units and the loop units are arranged around a geometric center of the grounding unit and are alternately and symmetrically arranged on the grounding unit. The loop units are arranged along the outer peripheral side of the grounding unit. The filter units are respectively electrically connected to the loop units. The present invention not only has some advantages such as small size, low profile, good isolation, high antenna gain and good radiation properties, but also can replace the external dual-band access-point antenna of the prior art for 2.4/5 GHz operation with no need of an extra diplexer. In addition, the hybrid multiple-input multiple-output antenna module can be hidden in the wireless communication device in order to enhance the appearance of the product.

Abstract: A Multiple-Input-Multiple-Output (MIMO) antenna device is adapted for connecting electrically to a radio frequency (RF) circuit for transmitting and receiving RF signals. The MIMO antenna device includes a circuit board, a plurality of antenna units, and a plurality of multiplexer units. The antenna units are disposed on the circuit board proximate to a peripheral edge thereof, are arranged in a loop formation, and are divided into a plurality of groups of the antenna units. Each of the multiplexer units is connected electrically to a respective one of the groups of the antenna units for selecting one of the corresponding antenna units and for connecting electrically the selected one of the corresponding antenna units to the RF circuit, thereby achieving the MIMO technique with the independently and simultaneously operating antenna units.

Abstract: A dual-loop antenna includes a grounding unit, a shorting unit, a feeding unit, a first loop radiating unit and a second loop radiating unit. The shorting unit has at least one shorting pin disposed on the grounding unit. The feeding unit has at least one feeding pin separated from the shorting pin by a predetermined distance and suspended above the grounding unit at a predetermined distance. The first loop radiating unit is disposed above the grounding unit at a predetermined distance. The first loop radiating unit has two ends respectively electrically connected to the shorting unit and the feeding unit. The second loop radiating unit is disposed above the grounding unit at a predetermined distance and around the first loop radiating unit. The second loop radiating unit has two ends respectively electrically connected to the shorting unit and the feeding unit.

Abstract: A multi-band antenna includes an antenna substrate, an antenna ground, an antenna unit, and a matching conductor. The antenna ground has a signal ground terminal and at least one bend. The antenna unit is adjacent to the antenna ground. The matching conductor is electrically coupled to the antenna ground, and an angle exists between the matching conductor and the antenna ground. A length of the first matching conductor is about a quarter of the wavelength corresponding to a frequency of the first operating band. The antenna unit includes a coupling conductor, a feeding conductor, a radiating conductor, and a shorting conductor. The feeding conductor has a signal feeding terminal One end of the radiating conductor is facing to the antenna ground, and a distance exists between the feeding conductor the antenna ground. Two ends of the shorting conductor are respectively electrically coupled to the antenna ground and the coupling conductor.

Abstract: A multi-band antenna includes a grounding portion, a main radiating portion, and a shielding wall. The main radiating portion includes a first radiating portion having a first feed end and a second radiating portion having a second feed end. The first and second radiating portions are structurally symmetrical. The main radiating portion and the shielding wall are arranged on opposite sides of the grounding portion.

Abstract: A patch antenna includes a metal plate having two parallel long edges and two short edges connected together. The metal plate has a first fold line and a second fold line that are parallel to the two short edges and that partition the metal plate into a ground portion and a radiating portion, the former being longer than the latter but not longer than twice the length of the latter. The metal plate has a shorting portion between the first and second fold lines. A feed-in portion extends from the second fold line toward the first fold line, forms a first slit with the ground portion, and forms a second slit with the shorting portion. Both slits are interconnected. The shorting portion is perpendicular with respect to the ground portion. The radiating portion is perpendicular with respect to the shorting portion and the feed-in portion.

Abstract: A multi-loop antenna module with wide beamwidth includes a grounding unit and a plurality of first loop units and second loop units. The first loop units are vertically disposed on outer peripheral sides of the grounding unit. Each first loop unit has a first shorting pin disposed on the grounding unit, a first feeding pin separated from the first shorting pin and suspended above the grounding unit, and a first loop radiating body connected between the first shorting pin and the first feeding pin. The second loop units are vertically disposed on outer peripheral sides of the grounding unit. Each second loop unit has a second shorting pin disposed on the grounding unit, a second feeding pin separated from the second shorting pin and suspended above the grounding unit, and a second loop radiating body connected between the second shorting pin and the second feeding pin.

Abstract: An unbalanced antenna includes a non-conductive substrate having one short edge, and two long edges connected respectively to two opposite ends of the short edge and parallel to each other, and an unbalanced antenna disposed proximate to the short edge of the non-conductive substrate and having a ground portion. A ground plane has side edges extending along the long edges of the non-conductive substrate, and is electrically coupled with the ground portion. The length of the ground plane is longer than a quarter of an equivalent wavelength corresponding to an operating frequency of the unbalanced antenna. A pair of choke sleeve structures are symmetrically disposed at opposite sides of the ground plane and spaced apart from the unbalanced antenna by a quarter of an equivalent wavelength corresponding to the operating frequency. Each choke sleeve structure has one end connected to the ground plane, and the other end extending in a direction away from the unbalanced antenna.

Abstract: A hybrid multi-antenna system includes a system circuit board, an antenna substrate, at least a dipole antenna, and at least a monopole-slot antenna. The system board has at least a system ground plate, and the system ground plate is served as a reflector of the hybrid multi-antenna system. The antenna substrate and the system ground plate have a first distance therebetween. The dipole antenna having a first signal feed-in source and the monopole-slot antenna having a second signal feed-in source respectively provide a first and second operating band, and they are on a surface of the antenna substrate. The monopole-slot antenna is located nearby the dipole antenna. The monopole-slot antenna and the dipole antenna have a second distance therebetween. The first and second signal feed-in sources are vertical to each other, and have the phase difference of 90°.

Abstract: A stand-alone multi-band antenna includes an antenna ground plate, a shielding metal wall, a first radiating unit, and a signal feed-in source. The first radiating unit connected to at least one side of the antenna ground plate and located above the antenna ground plate is an antenna structure generating the fringing-field. The first radiating unit provides a first operating band and a second operating band. The shielding metal wall is connected to a plurality of the adjacent sides of the antenna ground plate, and the height thereof is larger than or equal to that of the first radiating unit, therefore limiting the fringing-field of the first radiating unit within the stand-alone multi-band antenna. The signal feed-in source has a signal feed-in point and a ground point. The signal feed-in point is electrically connected to the first radiating unit, and the ground point is electrically connected to the shielding metal wall.

Abstract: The invention relates to a dual-feed antenna. The dual-feed antenna includes a substrate, a first antenna unit and a second antenna unit. The second antenna unit includes a second radiating unit and a second grounding unit. The second radiating unit includes a second radiator which has a first groove. The first groove has a first bottom and a pair of first arms. The second grounding unit includes a first sub-grounding-area and a second sub-grounding-area. The second sub-grounding-area has a second groove which includes a second bottom and a pair of second arms. The first sub-grounding-area is cross-wise connected with the second sub-grounding-area at the bottom of the groove, and the second arms symmetrically distribute to both sides of the first sub-grounding-area, and the first groove has an opening direction opposite to the opening direction of the second groove.

Abstract: A built-in multi-antenna module includes a grounding unit, a plurality of first radiating units and a plurality of second radiating units. The first and the second radiating units are disposed on the grounding unit. Each first radiating unit has a first radiating body, a first feeding pin extended downwards from the first radiating body, and a first shorting pin extended downwards from the first radiating body and connected to the grounding unit. Each second radiating unit has a second radiating body, a second feeding pin extended downwards from the second radiating body, and a second shorting pin extended downwards from the second radiating body and connected to the grounding unit. The first radiating units and the second radiating units are alternately and symmetrically arranged on the grounding unit, and many included angles respectively formed between each first radiating unit and each second radiating unit are the same.

Abstract: An antenna system includes: and antenna module and a system module. The antenna module includes a substrate, and a plurality of planar dipole antennas each including a short-circuit section, two first radiator sections operable in a first frequency band and connected to the short-circuit section, and two second radiator sections operable in a second frequency band and connected to the short-circuit section. The planar dipole antennas are arranged such that geometric centers thereof are respectively spaced apart from a center point bounded by the planar dipole antennas by a predetermined distance, such that each of the planar dipole antennas is spaced apart from an adjacent one of the planar dipole antennas by a predetermined minimum distance. The system module has a grounding plane that faces toward and that is spaced apart from and parallel to the substrate.

Abstract: A multi-loop antenna system includes: a plurality of loop antennas disposed on a substrate and arranged such that each of extending lines extending respectively from geometric centers of the loop antennas to a center point that is bounded by the loop antennas has a predetermined length, and that each of the loop antennas is spaced apart from an adjacent one of the same by a predetermined distance; and a system module facing toward and being spaced apart from and parallel to the substrate such that the grounding plane is able to reflect radiation from the loop antennas. Each of the loop antennas includes first and second radiator portions operable in respective frequency bands; the former having opposite ends that respectively serve as signal-feed and grounding sections; the latter having opposite ends that are connected respectively to the signal-feed and grounding sections.

Abstract: A multi-input and multi-output antenna system is disclosed. The antenna system includes a predetermined quantity of dual-feed and dual-band antennas that are arranged into a polygon on a plane. The dual-feed and dual-band antenna includes a substrate, a grounding unit disposed on the substrate and having two opposite sides, a first radiating unit disposed on the substrate near one side of the grounding unit, and a second radiating unit disposed on the substrate near the other side. The second radiating unit has a shorting element that is electrically connected to the grounding unit. The polygon is bounded by lengthwise projection lines of the dual-feed and dual-band antennas.

Abstract: A multi-loop antenna system includes a substrate having opposite first and second surfaces, a first loop antenna disposed on the first surface, and a second loop antenna disposed on one of the first and second surfaces. Each of the first and second loop antennas is operable in a corresponding one of first and second frequency bands, and includes a signal-feed portion and a grounding portion that are disposed adjacent to each other and that are disposed proximate to a respective one of peripheral edges of the substrate, and a radiator portion that has opposite ends connected electrically and respectively to the signal-feed and grounding portions and that cooperates therewith to form a loop.

Abstract: An antenna device includes: a substrate; micro-strip and grounding portions that are respectively disposed on opposite first and second surfaces of the substrate, the former including a signal-feed section for feeding of signals and a plurality of first connecting sections electrically connected to the signal-feed section; and a plurality of first loop antennas arranged along a peripheral edge of the grounding portion, each including a first radiator portion disposed on the first surface and electrically connected to a respective one of the first connecting sections, and a second radiator portion disposed on the second surface, electrically interconnecting the first radiator portion and the grounding portion, and cooperating with the first radiator portion to form a loop.

Abstract: A wideband antenna for receiving digital television signals includes a substrate, a radiating plate, a first radiating element, and a second radiating element. The radiating plate is formed on the substrate and the radiating plate has a first radiating area, a second radiating area and a slit formed between the first and the second radiating areas. The first and the second radiating elements are pivotedly connected to the radiating plate. The first radiating element and the second radiating element are constructed as a dipole antenna structure of the antenna so as to excite a first resonant mode. The radiating plate also acts as a matching circuit thereon so as to excite a second resonant mode. The center frequency of the second resonant mode is shifted toward the center frequency of the first resonant mode with the incorporation of the radiating plate so that the antenna has a wideband characteristic.