Abstract: A portable electronic device includes a housing, a substrate, a radiation conductor and a short circuit conductor. The housing defines an accommodating space and includes a frame that has a body portion and a radiation portion. The substrate is disposed in the accommodating space, is surrounded by the frame, and has a grounding portion. The radiation conductor is disposed in the accommodating space, is electrically coupled to the radiation portion, and includes a feed-in point. The short circuit conductor is electrically coupled between one end of the radiation portion and the grounding portion.

Abstract: A multi-band dipole antenna includes spaced part first and second radiator sections, first and second mirroring radiator sections, and a balun, which are disposed on a substrate. The first mirroring radiator section is symmetrically disposed with respect to the first radiator section and is spaced apart from the first radiator section. The first radiator section and the first mirroring radiator section cooperate to resonate in a first frequency band. The second radiator section cooperates with the second mirroring radiator section to resonate in a second frequency band.

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 communications device capable of coupling current reduction includes a first casing, a second casing, and an antenna. The first casing includes a first metal layer part. The second casing includes a second metal layer part. The antenna is adjacent to the first and second metal layer parts when the second casing is at a covering position. The first metal layer part has a surface that confronts the second metal layer part when the second casing is at the covering position and that is formed with a plurality of first recesses. The second metal layer part has a surface that confronts the first metal layer part when the second casing is at the covering position and that is formed with a plurality of second recesses.

Abstract: An electronic device includes a radio frequency module having a communication port, and an antenna module having a number of antennas electrically coupled to the communication port. A method of reducing specific absorption rate (SAR) for the electronic device includes: a) measuring the SAR for the electronic device to obtain a measurement result; b) increasing the number of antennas of the antenna module when the measurement result is not lower than a standard value; and c) repeating steps a) and b) until the measurement result is equal to or smaller than the standard value.

Abstract: An antenna includes a grounding element, a connecting element, and first and second radiator elements. The connecting element includes an elongated first connecting section, and a second connecting section connecting the first connecting section to the grounding element. The first radiator element includes a first radiator section extending substantially perpendicular from one side of the first connecting section, and second and third radiator sections extending substantially perpendicular from one side of the first radiator section. The second radiator element includes a first radiator portion extending substantially perpendicular from the one side of the first connecting section, and second and third radiator portions extending substantially perpendicular from one side of the first radiator portion and extending in an opposite direction relative to the second and third radiator sections.

Abstract: A method for reducing current flowing through a load within a particular frequency band includes the steps of configuring an electrical device to receive an alternating current (AC) signal; and configuring a filter to determine the current flowing through a load according to a frequency of the AC signal. An impedance of the filter in a conducting frequency band is lower than an impedance of the filter in a non-conducting frequency band so the filter divides the current of the AC signal within the conducting frequency band so that the load current through the load is reduced.

Abstract: A portable electronic device includes a housing, a substrate, a radiation conductor and a short circuit conductor. The housing defines an accommodating space and includes a frame that has a body portion and a radiation portion. The substrate is disposed in the accommodating space, is surrounded by the frame, and has a grounding portion. The radiation conductor is disposed in the accommodating space, is electrically coupled to the radiation portion, and includes a feed-in point. The short circuit conductor is electrically coupled between one end of the radiation portion and the grounding portion.

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: A twin-Vee-type dual band antenna includes interconnected first and second conductor arms and interconnected first and second mirroring conductor arms disposed on a substrate. The second conductor arm has a radiator section extending parallel to the first conductor arm. The first mirroring conductor arm is symmetrical to the first conductor arm, and forms an angle (?) of less than 180 degrees with the first conductor arm. The second mirroring conductor arm is symmetrical to the second conductor arm, and has a radiator section extending parallel to the first mirroring conductor arm.

Abstract: An electronic device includes a radio frequency module having a communication port, and an antenna module having a number of antennas electrically coupled to the communication port. A method of reducing specific absorption rate (SAR) for the electronic device includes: a) measuring the SAR for the electronic device to obtain a measurement result; b) increasing the number of antennas of the antenna module when the measurement result is not lower than a standard value; and c) repeating steps a) and b) until the measurement result is equal to or smaller than the standard value.

Abstract: A multi-band dipole antenna includes spaced part first and second radiator sections, first and second mirroring radiator sections, and a balun, which are disposed on a substrate. The first mirroring radiator section is symmetrically disposed with respect to the first radiator section and is spaced apart from the first radiator section. The first radiator section and the first mirroring radiator section cooperate to resonate in a first frequency band. The second radiator section cooperates with the second mirroring radiator section to resonate in a second frequency band.

Abstract: A multi-band antenna is adapted for disposing on a substrate with a ground plane and a matching circuit disposed thereon, and includes a feed-in section, a coupling section, a grounding section, a multiple-bend arm, and a conductor section. The feed-in section is connected electrically to the matching circuit. The coupling section is connected electrically to the feed-in section and is disposed spacedly from the ground plane. The grounding section is connected electrically to the ground plane. The multiple-bend arm is connected electrically to the coupling section and the grounding section and cooperates with the grounding section to form a signal path for signals in a first frequency band. The conductor section is connected electrically to the multiple-bend arm and cooperates with a portion of the multiple-bend arm to form a signal path for signals in a second frequency band.

Abstract: A communications device capable of coupling current reduction includes a first casing, a second casing, and an antenna. The first casing includes a first metal layer part. The second casing includes a second metal layer part. The antenna is adjacent to the first and second metal layer parts when the second casing is at a covering position. The first metal layer part has a surface that confronts the second metal layer part when the second casing is at the covering position and that is formed with a plurality of first recesses. The second metal layer part has a surface that confronts the first metal layer part when the second casing is at the covering position and that is formed with a plurality of second recesses.

Abstract: A twin-Vee-type dual band antenna includes interconnected first and second conductor arms and interconnected first and second mirroring conductor arms disposed on a substrate. The second conductor arm has a radiator section extending parallel to the first conductor arm. The first mirroring conductor arm is symmetrical to the first conductor arm, and forms an angle (?) of less than 180 degrees with the first conductor arm. The second mirroring conductor arm is symmetrical to the second conductor arm, and has a radiator section extending parallel to the first mirroring conductor arm.

Abstract: A multi-band antenna is adapted for disposing on a substrate with a ground plane and a matching circuit disposed thereon, and includes a feed-in section, a coupling section, a grounding section, a multiple-bend arm, and a conductor section. The feed-in section is connected electrically to the matching circuit. The coupling section is connected electrically to the feed-in section and is disposed spacedly from the ground plane. The grounding section is connected electrically to the ground plane. The multiple-bend arm is connected electrically to the coupling section and the grounding section and cooperates with the grounding section to form a signal path for signals in a first frequency band. The conductor section is connected electrically to the multiple-bend arm and cooperates with a portion of the multiple-bend arm to form a signal path for signals in a second frequency band.

Abstract: An antenna device includes a substrate and an antenna disposed on the substrate. The substrate has opposite first and second surfaces. The antenna is disposed on the first surface, and includes a feed-in portion, a radiator portion, and a grounding portion. The feed-in portion has a feed-in section for feeding of signals, and a connecting section opposite to the feed-in section. The radiator portion is connected to the connecting section and extends along a first longitudinal line. The grounding portion includes a first grounding section extending along a second longitudinal line from the feed-in section and spaced apart from the radiator portion. The substrate has a region that is between the first and second longitudinal lines and that is formed with a slot extending through the first and second surfaces.

Abstract: An antenna includes a grounding element, a connecting element, and first and second radiator elements. The connecting element includes an elongated first connecting section, and a second connecting section connecting the first connecting section to the grounding element. The first radiator element includes a first radiator section extending substantially perpendicular from one side of the first connecting section, and second and third radiator sections extending substantially perpendicular from one side of the first radiator section. The second radiator element includes a first radiator portion extending substantially perpendicular from the one side of the first connecting section, and second and third radiator portions extending substantially perpendicular from one side of the first radiator portion and extending in an opposite direction relative to the second and third radiator sections.

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: 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.