Abstract: A broadband dipole antenna includes a dielectric substrate, a first radiating portion, a second radiating portion, a substantially U-shaped or V-shaped feed gap, and two feed points. The feed gap is located in-between the first radiating portion and the second radiating portion. The two feed points are located in the first radiating portion and the second radiating portion, respectively, and separated by the feed gap.

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 wire antenna comprises a main radiating element, a grounding element, a shorting element, and a coaxial cable. The said main radiating element and the said grounding element are linked by the said shorting element. A central conducting wire and an outer grounding conductor of the coaxial cable are electrically connected to the first and the second points on the said main radiating element and the said grounding element respectively. The main radiating element and the grounding element are all made of a single metal wire with compact size and low cost. The present invention is capable of single or dual-band operation for applications in WLAN devices.

Abstract: A broadband antenna is capable of generating an upper resonant mode (at about 700 MHz) from a first radiating arm and a lower resonant mode (at about 500 MHz) from a second radiating arm. The first and second radiating arms are bent at least one time. An open end of the second radiating arm is extended toward an open end of the first radiating arm with a predefined distance there between. The predefined distance can be adjusted to improve the impedance matching of lower resonant mode, which can be further combined with the upper resonant mode to achieve a broad bandwidth covering the complete spectrum of digital TV channels (470-862 MHz).

Abstract: A 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 the first side of the grounding unit, and a second radiating unit disposed on the substrate near the second side. The second radiating unit has a short-circuit strip electrically connected to the grounding unit. The antenna further includes a first coaxial cable electrically connected to the first radiating unit and the grounding unit, and a second coaxial cable electrically connected to the second radiating unit and the grounding unit.

Abstract: A digital television receiving antenna includes a first radiating element and a second radiating element electrically connected to the first radiating element. The second radiating element is foldable, and includes a wide radiating metal plate, and a narrow radiating metal strip, wherein one end of the narrow radiating metal strip is a feeding point insulated from the first radiating element with a predefined distance, and the other end of the narrow radiating metal strip is electrically connected to the wide radiating metal plate.

Abstract: A dual-band dipole antenna includes two radiating arms and a short-circuited element. The two radiating arms and the short-circuited element are formed monolithically. Each radiating arm has a feed-in end and a radiating end. Each radiating arm has a slot that divides the radiating arm into a first radiating portion and a second radiating portion. The resonant frequencies of the first radiating portion and the second radiating portion are different to radiate/receive wireless signals in two frequencies respectively. The short-circuited element is connected to the feed-in end of each radiating arm, so as to electrically connect the two radiating arms. The short-circuited element also makes an included angle formed between the two radiating arms, so as to obtain the effect of dipole gains of the radio waves transferred or received by the two radiating arms.

Abstract: A dipole antenna device includes a first metal piece including at least one bending part and a first feeding point; a second metal piece including a second bending part and a second feeding point; and a third metal piece electrically connected to a first connection point of the first metal piece and a second connection point of the second metal piece; wherein the first metal piece and the second metal piece are not electrically connected to each other except the first connection point and the second connection point.

Abstract: An antenna device includes a first conductive piece, a second conductive piece, a third conductive piece and a feeding point. The second conductive piece is electrically coupled to a predetermined voltage level. The third conductive piece is electrically connected to the first conductive piece and the second conductive piece. The feeding point is located on the first conductive piece.

Abstract: A dual-band dipole antenna includes two radiating arms and a short-circuited element. The two radiating arms and the short-circuited element are formed monolithically. Each radiating arm has a feed-in end and a radiating end. Each radiating arm has a slot that divides the radiating arm into a first radiating portion and a second radiating portion. The resonant frequencies of the first radiating portion and the second radiating portion are different to radiate/receive wireless signals in two frequencies respectively. The short-circuited element is connected to the feed-in end of each radiating arm, so as to electrically connect the two radiating arms. The short-circuited element also makes an included angle formed between the two radiating arms, so as to obtain the effect of dipole gains of the radio waves transferred or received by the two radiating arms.

Abstract: The present invention provides a digital television receiving antenna for a plug-and-play device. The digital television receiving antenna includes a first conducting portion; and a second conducting portion, coupled to the first conducting portion and having a resonance path, wherein the second conducting portion is position-adjustable relatively to the first conducting portion, and an effective length of the resonance path is greater than a straight-line distance between two end points of the resonance path.

Abstract: An omnidirectional ultra-wideband monopole antenna, with the characteristics of simple structure, easy fabrication and low cost, mainly comprises a ground plane, a U-shaped radiating member above the ground plane and a feeding member for feeding signals to the radiating member. The radiating member further comprises a first sub-radiating member parallel to the ground plane, with a first side edge and a corresponding second side edge, a second sub-radiating member connected to the first side edge and perpendicular to the first sub-radiating member, forming a first angle therebetween, and a third sub-radiating member connected to the second side edge to form a second angle. The second sub-radiating member and the third sub-radiating member are extended in the same upright direction above the ground plane. The antenna can provide good omnidirectional radiation patterns for frequencies across a very wide operating bandwidth.

Abstract: A broadband antenna is capable of generating an upper resonant mode (at about 700 MHz) from a first radiating arm and a lower resonant mode (at about 500 MHz) from a second radiating arm. The first and second radiating arms are bent at least one time. An open end of the second radiating arm is extended toward an open end of the first radiating arm with a predefined distance there between. The predefined distance can be adjusted to improve the impedance matching of lower resonant mode, which can be further combined with the upper resonant mode to achieve a broad bandwidth covering the complete spectrum of digital TV channels (470-862 MHz).

Abstract: A broadband dipole antenna includes a dielectric substrate, a first radiating portion, a second radiating portion, a substantially U-shaped or V-shaped feed gap, and two feed points. The feed gap is located in-between the first radiating portion and the second radiating portion. The two feed points are located in the first radiating portion and the second radiating portion, respectively, and separated by the feed gap.

Abstract: An electronic device and short-circuited dipole antenna thereof are provided. The short-circuited dipole antenna comprises a first radiation unit, a second radiation unit and a short-circuited unit. The short-circuited unit comprises a first terminal connected to the first radiation unit, and a second terminal connected to the second radiation unit.

Abstract: The present invention provides an electronic device. The electronic device comprises a circuit board; and a dipole antenna, having a first conducting portion and a second conducting portion that are electrically coupled to the circuit board respectively and disposed substantially along an outline of the circuit board.

Abstract: An ultra-wide band (UWB) antenna and a plug-and-play (PnP) device using the same are provided. A dielectric substrate of the PnP device has a ground plane. The UWB antenna includes a radiating metal plate and a feeding portion. The radiating metal plate is in a non-ground region of the dielectric substrate and has at least a slit cut. An opening of the slit cut is at the edge of the radiating metal plate facing the ground plane. The feeding portion is also at the edge of the radiating metal plate facing the ground plate for feeding a signal to the antenna.

Abstract: An ultra-wideband shorted dipole antenna includes a coaxial cable line and first and second open-loop radiating metal plates with substantially the same shape. The coaxial cable line has a central conducting wire and an outer grounder sheath. The first and second open-loop radiating metal plates are symmetrically disposed on two sides of the antenna to form two arms of the antenna and are electrically connected to each other. Each of the first and second open-loop radiating metal plates has a signal feeding point electrically connected to the central conducting wire or the outer grounder sheath of the coaxial cable line.

Abstract: A dipole antenna includes a substrate, a radiating metal plate and a radiating metal line. The radiating metal plate is disposed on the substrate and has a first signal feeding point near a lateral side of the substrate. The radiating metal line has a second signal feeding point near the first signal feeding point.

Abstract: A receiving antenna for digital television signal reception includes a dielectric substrate, a radiating plate formed on the dielectric substrate with a bar shape, having a first long edge and a second long edge corresponding to the first long edge, a slit formed on the radiating plate with a length at least two times the width of the radiating plate, having a terminal at about the center of the first long edge and a terminal at the second long edge, and separating the radiating plate into a first sub-plate and a second sub-plate, a first feeding point formed on the first sub-plate, a second feeding point formed on the second sub-plate, and a feeding coaxial cable having a core conductor connected to the first feeding point and a grounding conductor connected to the second feeding point.