Abstract: A mobile device includes a ground plane, a grounding branch, a connection element, a first radiation branch, and a second radiation branch. The grounding branch is coupled to the ground plane. A first open slot is formed and substantially surrounded by the grounding branch and the ground plane. The first radiation branch is coupled through the connection element to the grounding branch. A second open slot is formed and is substantially surrounded by the first radiation branch and the grounding branch. The second radiation branch is disposed in the second open slot and is coupled to the grounding branch. A multi-band antenna structure is formed by the grounding branch, the connection element, the first radiation branch, and the second radiation branch.

Abstract: The invention provides an antenna switching method for a wireless communication apparatus. The wireless communication apparatus includes a first antenna, a second antenna, a first modem, a switch, and a second modem. The first modem generates a control signal; the switch is coupled to the first antenna, the second antenna, the first modem, and the second modem. The switch receives the control signal and performs switching according to the control signal to make the first antenna to be coupled to one of the first modem and the second modem, and to make the second antenna to be coupled to the other one of the first modem and the second modem.

Abstract: A mobile device includes a dielectric substrate, a metal layer, a metal housing, a nonconductive partition, at least one connection element, and a feeding element. The metal layer is disposed on the dielectric substrate, and includes an upper element and a main element, wherein a slot is formed between the upper element and the main element. The metal housing is substantially a hollow structure, and has a slit, wherein the slit is substantially aligned with the slot of the metal layer. The connection element couples the upper element of the metal layer to the metal housing. The feeding element is coupled to the upper element of the metal layer or coupled to the metal housing. An antenna structure is formed by the feeding element, the upper element of the metal layer, the connection element, and the metal housing.

Abstract: A mobile device includes an antenna structure, a signal source, a tunable circuit element, and a tuner. The antenna structure includes a radiation element. The tunable circuit element is coupled to the radiation element. The antenna structure and the tunable circuit element are disposed in a clearance region of the mobile device. The tuner has a variable impedance value, and is coupled between the tunable circuit element and the signal source. The tuner and the signal source are disposed in a circuit board region of the mobile device.

Abstract: A mobile device includes a ground plane, a grounding branch, and a feeding element. The grounding branch is coupled to the ground plane, wherein a slot is formed between the ground plane and the grounding branch. The feeding element extends across the slot. The feeding element is coupled between the grounding branch and a signal source. An antenna structure is formed by the feeding element and the grounding branch.

Abstract: An antenna assembly includes first and second antennas each generating a resonant mode to cover an operating bandwidth, and a transmission line. The first includes a first radiation unit with a feed-in portion coupled to a first feed portion in contact with a core wire of a coaxial cable and a first grounding portion. The second antenna includes a second radiation unit with a second feed-in portion coupled to a second feed portion in contact with a conductive shielding layer of the coaxial cable and a second grounding portion. The transmission line includes first and second connecting portions coupled respectively to the second feed portion of the second feed-in portion. When a signal within the operating bandwidth is transmitted through the coaxial cable, the energy of the signal is distributed among the first and second antennas.

Abstract: A dual-band antenna includes first and second connecting sections coupled to a ground unit, and first, second, and third radiator sections. The first connecting section extends in a direction from the ground unit toward an inner wall face of a housing of an electronic device. The first radiator section is connected to the first connecting section and is disposed to extend along the inner wall face. A feed-in section extends between the second connecting section and the inner wall face, and has a portion extending parallel to the first radiator section. The second radiator section is connected to the feed-in section and is disposed to extend along the inner wall face. The third radiator section is connected to the second radiator section, extends between the second radiator section and the feed-in section, and has a portion extending parallel to the second radiator section.

Abstract: A multi-band antenna module is disposed in a housing of an electronic device. The housing has a grounding plane disposed therein and includes a metal frame part having two ends electrically connected to opposite side edges of the grounding plane. The multi-band antenna module includes a conductor, a substrate, a grounding section, and a first radiator section. The conductor is to be coupled across the metal frame part and the grounding plane so as to cooperate with the grounding plane and a portion of the metal frame part to form a closed loop thereamong, in which the substrate is disposed. The first radiator section and the grounding section are disposed on the substrate, with the grounding section to be coupled electrically to the grounding plane. A portion of the first radiator section is disposed to cooperate with the closed loop to resonate in a first frequency band. Another portion of the first radiator section is disposed to cooperate with the grounding section to resonate in a second frequency band.

Abstract: A mobile device includes a substrate, a ground element, and a radiation branch. The ground element includes a ground branch, wherein an edge of the ground element has a notch extending into the interior of the ground element so as to form a slot region, and the ground branch partially surrounds the slot region. The radiation branch is substantially inside the slot region, and is coupled to the ground branch of the ground element. The ground branch and the radiation branch form an antenna structure.

Abstract: A multi-band antenna for a portable communication device is disclosed, in which the communication device includes a first housing, a second housing and a substrate. The multi-band antenna includes a feeding portion, a system ground plane, a metal ring, a resonant cavity, a first and a second radiating portion. The system ground plane is disposed on the substrate. The metal ring is connected to the first housing, and forms a space with the first housing to accommodate the substrate, in which the metal ring is electrically coupled to the system ground plane through a plurality of ground ends. The resonant cavity is formed between the system ground plane and the metal ring to generate a first resonant mode. The first and the second radiating portion are disposed on the second housing, for generating a second and a third resonant mode, respectively.

Abstract: An antenna device includes a substrate, and a dual-band antenna disposed on a surface of the substrate. The dual-band antenna includes a feed-in section, a first radiator arm, a second radiator arm, a third radiator arm, and a ground section. The feed-in section is for signal feed-in, and has opposite first and second ends. The first radiator arm extends from the first end of the feed-in section and is parallel to the feed-in section. The second radiator arm is connected to the second end of the feed-in section and extends parallel to the feed-in section. The third radiator arm is disposed adjacent to and extends parallel to the first radiator arm in a manner that the feed-in section is disposed between the third radiator arm and the second radiator arm. The ground section is connected to the third radiator arm.

Abstract: An antenna assembly includes first and second antennas each generating a resonant mode to cover an operating bandwidth, and a transmission line. The first includes a first radiation unit with a feed-in portion coupled to a first feed portion in contact with a core wire of a coaxial cable and a first grounding portion. The second antenna includes a second radiation unit with a second feed-in portion coupled to a second feed portion in contact with a conductive shielding layer of the coaxial cable and a second grounding portion. The transmission line includes first and second connecting portions coupled respectively to the second feed portion of the second feed-in portion. When a signal within the operating bandwidth is transmitted through the coaxial cable, the energy of the signal is distributed among the first and second antennas.

Abstract: A multi-band antenna includes a ground section, a feed-in section, a first conductor arm, and a second conductor arm. The feed-in section has a first end, a second end opposite to the first end, and a feed-in point for feeding in radio frequency signals. The first end of the feed-in section is connected electrically to the ground section. The first conductor arm has a connecting section that extends from the second end of the feed-in section, and an extending section that extends from the connecting section, that is distal from the ground section, and that has a first end portion. The second conductor arm extends from the second end of the feed-in section, and has a second end portion that is adjacent to the first end portion of the extending section.

Abstract: A multi-band antenna module is disposed in a housing of an electronic device. The housing has a grounding plane disposed therein and includes a metal frame part having two ends electrically connected to opposite side edges of the grounding plane. The multi-band antenna module includes a conductor, a substrate, a grounding section, and a first radiator section. The conductor is to be coupled across the metal frame part and the grounding plane so as to cooperate with the grounding plane and a portion of the metal frame part to form a closed loop thereamong, in which the substrate is disposed. The first radiator section and the grounding section are disposed on the substrate, with the grounding section to be coupled electrically to the grounding plane. A portion of the first radiator section is disposed to cooperate with the closed loop to resonate in a first frequency band. Another portion of the first radiator section is disposed to cooperate with the grounding section to resonate in a second frequency band.

Abstract: An antenna includes: a grounding element extending along a first plane; a radiating element having a first side and extending along a second plane substantially parallel to the first plane, the radiating element being aligned with the grounding element in a normal direction transverse to the first and second planes; a bridging element interconnecting the grounding and radiating elements; and a feeding element extending and tapered from the first side of the radiating element toward the grounding element.

Abstract: An antenna includes first and second radiating elements and a conductive arm. The second radiating element has opposite feeding and grounding end portions, each of which is coupled to a respective one of feeding and grounding end portions of the first radiating element. The conductive arm is coupled to the feeding end portion of the second radiating element.

Abstract: An antenna module is adapted for disposing in an electronic apparatus that includes first and second housing members and that is operable in a tablet mode, in which the first and second housing members are disposed in a manner that the first housing member overlaps the second housing member. The antenna module includes: a first antenna element to be disposed in the first housing member; and a second antenna element to be disposed in the second housing member, and corresponding substantially in position and proximate to the first antenna element for electromagnetic coupling therewith when the electronic apparatus is operated in the tablet mode.

Abstract: An antenna device includes a grounding element, a radiating element, and first and second feeding elements. The radiating element includes a first segment that extends from the grounding element and that has an end distal from the grounding element, and second and third segments that extend from the end of the first segment in opposite directions. Each of the first and second feeding elements includes first and second segments. The first segment of each of the first and second feeding elements is disposed proximate to a respective one of the second and third segments of the radiating element. The second segment of each of the first and second feeding elements is disposed proximate to the grounding element.

Abstract: A multi-band antenna includes a ground section, a feed-in section, a first conductor arm, and a second conductor arm. The feed-in section has a first end, a second end opposite to the first end, and a feed-in point for feeding in radio frequency signals. The first end of the feed-in section is connected electrically to the ground section. The first conductor arm has a connecting section that extends from the second end of the feed-in section, and an extending section that extends from the connecting section, that is distal from the ground section, and that has a first end portion. The second conductor arm extends from the second end of the feed-in section, and has a second end portion that is adjacent to the first end portion of the extending section.

Abstract: An antenna includes a T-shaped radiating element and a coupling element. The radiating element includes opposite first and second radiating portions, and a feeding portion that extends transversely to the first and second radiating portions and that is connected to a junction of the first and second radiating portions. The coupling element is disposed between the second radiating portion and the feeding portion of the radiating element, and is coupled electromagnetically to at least one of the second radiating portion and the feeding portion of the radiating element.