Abstract: A communication device includes a ground plane, an antenna structure, a cable, a connection metal element, and a dielectric substrate. The antenna structure has a feeding point. The cable includes a feeding conductor and a grounding conductor. The feeding conductor is coupled to the feeding point. The grounding conductor includes a first conductive region and a second conductive region. The connection metal element is coupled between the first conductive region and the second conductive region of the grounding conductor. The antenna structure and the connection metal element are disposed on the dielectric substrate. The cable is adjacent to the ground plane. Neither the first conductive region nor the second conductive region of the grounding conductor is coupled to the ground plane.

Abstract: A communication device includes a ground plane, an antenna structure, a cable, a connection metal element, and a dielectric substrate. The antenna structure has a feeding point. The cable includes a feeding conductor and a grounding conductor. The feeding conductor is coupled to the feeding point. The grounding conductor includes a first conductive region and a second conductive region. The connection metal element is coupled between the first conductive region and the second conductive region of the grounding conductor. The antenna structure and the connection metal element are disposed on the dielectric substrate. The cable is adjacent to the ground plane. Neither the first conductive region nor the second conductive region of the grounding conductor is coupled to the ground plane.

Abstract: An antenna structure includes a main ground element, an extension ground element, a feeding radiation element, a first radiation element, a second radiation element, a shorting radiation element, a third radiation element, and a dielectric substrate. The extension ground element is coupled to the main ground element. A notch region is defined by the main ground element and the extension ground element. The feeding radiation element has a feeding point. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the feeding radiation element. The second radiation element and the first radiation element substantially extend in opposite directions. The feeding radiation element is also coupled through the shorting radiation element to the extension ground element. The third radiation element is coupled to the main ground element.

Abstract: An antenna structure includes a main ground element, an extension ground element, a feeding radiation element, a first radiation element, a second radiation element, a shorting radiation element, a third radiation element, and a dielectric substrate. The extension ground element is coupled to the main ground element. A notch region is defined by the main ground element and the extension ground element. The feeding radiation element has a feeding point. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the feeding radiation element. The second radiation element and the first radiation element substantially extend in opposite directions. The feeding radiation element is also coupled through the shorting radiation element to the extension ground element. The third radiation element is coupled to the main ground element.

Abstract: A communication device includes a ground metal element and an antenna element. The antenna element includes a first metal element, a second metal element, a third metal element, a first capacitive element, a second capacitive element, an inductive element, and a signal feeding source. A first connection point of the first metal element is coupled through the first capacitive element to the third metal element. A second connection point of the first metal element is coupled through the second capacitive element to the ground metal element. A third connection point of the second metal element is coupled through the inductive element to the third metal element. A shorting end of the third metal element is coupled to the ground metal element. The signal feeding source is coupled between the first metal element and the third metal element or the ground metal element.

Abstract: A communication device includes a ground metal element and an antenna element. The antenna element includes a first metal element, a second metal element, a third metal element, a first capacitive element, a second capacitive element, an inductive element, and a signal feeding source. A first connection point of the first metal element is coupled through the first capacitive element to the third metal element. A second connection point of the first metal element is coupled through the second capacitive element to the ground metal element. A third connection point of the second metal element is coupled through the inductive element to the third metal element. A shorting end of the third metal element is coupled to the ground metal element. The signal feeding source is coupled between the first metal element and the third metal element or the ground metal element.

Abstract: A communication device includes a ground element, a dielectric substrate, and an antenna element. The dielectric substrate is disposed adjacent to an edge of the ground element. The antenna element is disposed on the dielectric substrate. The antenna element includes a feeding metal element, a shorting metal element, a first radiation metal element, a second radiation metal element, and an inductive element. The feeding metal element has a feeding point. The shorting metal element is coupled to the ground element. The first radiation metal element is coupled to the shorting metal element, and is disposed adjacent to the feeding metal element. The second radiation metal element is coupled through the inductive element to the feeding metal element. The second radiation metal element is further coupled to the ground element.

Abstract: A communication device includes a ground element, a dielectric substrate, and an antenna element. The dielectric substrate is disposed adjacent to an edge of the ground element. The antenna element is disposed on the dielectric substrate. The antenna element includes a feeding metal element, a shorting metal element, a first radiation metal element, a second radiation metal element, and an inductive element. The feeding metal element has a feeding point. The shorting metal element is coupled to the ground element. The first radiation metal element is coupled to the shorting metal element, and is disposed adjacent to the feeding metal element. The second radiation metal element is coupled through the inductive element to the feeding metal element. The second radiation metal element is further coupled to the ground element.

Abstract: A communications device includes a system ground plane, a signal source, a device frame, a magnetic conductive material and an antenna. The signal source is electrically coupled to the system ground plane. The device frame is perpendicular to the system ground plane. The antenna is electrically coupled to the signal source and is disposed on the device frame. The magnetic conductive material is disposed adjacent to the antenna but spaced apart by a first predetermined distance from the antenna. The magnetic line of force induced by the antenna is directed in a predetermined direction by the magnetic conductive material.

Abstract: A communications device includes a ground plane, a signal source, a filling material and an antenna. The signal source is electrically connected to the ground plane. The antenna has a predetermined metal pattern and is coupled to the signal source. The filling material is a non-conductive material and the filling material and the predetermined metal pattern are bonded heterogeneously via a surface-mount technology.

Abstract: A communications device includes a ground plane, a signal source, a filling material and an antenna. The signal source is electrically connected to the ground plane. The antenna has a predetermined metal pattern and is coupled to the signal source. The filling material is a non-conductive material and the filling material and the predetermined metal pattern are bonded heterogeneously via a surface-mount technology.

Abstract: A dual-band antenna structure includes a ground plane, a signal source, a coupling gap, a first feeding arm, a second feeding arm, a first radiation arm, and a second radiation arm. The first and second feeding arms are electrically coupled to the signal source. The first radiation arm has a first open end and a first grounding point. The second radiation arm has a second open end and a second grounding point. The first and second open ends are opposite each other. The first and second grounding points are electrically connected to the ground plane.

Abstract: A communications device includes a system ground plane, a signal source, a device frame, a magnetic conductive material and an antenna. The signal source is electrically coupled to the system ground plane. The device frame is perpendicular to the system ground plane. The antenna is electrically coupled to the signal source and is disposed on the device frame. The magnetic conductive material is disposed adjacent to the antenna but spaced apart by a first predetermined distance from the antenna. The magnetic line of force induced by the antenna is directed in a predetermined direction by the magnetic conductive material.

Abstract: A Gamma curve correction method for an LCD sets a ground potential of the LCD as a common voltage and adjusts at least one of a plurality of positive Gamma voltages and a plurality of negative Gamma voltages of the LCD such that the central voltage value of a Gamma curve established by the positive Gamma voltages and the negative Gamma voltages becomes closer to the common voltage. As a result, flickers existing in the images of the LCD are improved.

Abstract: A Gamma curve correction method for an LCD sets a ground potential of the LCD as a common voltage, and adjusts at least one of a plurality of positive Gamma voltages and a plurality of negative Gamma voltages of the LCD such that the central value of a Gamma curve established by the positive Gamma voltages and the negative Gamma voltages becomes closer to the common voltage. As a result, flickers existing in the images of the LCD are improved.

Abstract: A mobile device includes a metal cavity, a dielectric substrate, and a feeding element. A slot is formed on a side wall of the metal cavity. The dielectric substrate is disposed in the metal cavity. The feeding element is disposed on the dielectric substrate, and is electrically connected to a signal source. A slot antenna structure is formed by the metal cavity, the dielectric substrate, and the feeding element.

Abstract: A mobile device includes a metal cavity, a dielectric substrate, and a feeding element. A slot is formed on a side wall of the metal cavity. The dielectric substrate is disposed in the metal cavity. The feeding element is disposed on the dielectric substrate, and is electrically connected to a signal source. A slot antenna structure is formed by the metal cavity, the dielectric substrate, and the feeding element.

Abstract: A transformable mobile device operating in a notebook mode or a tablet mode is provided. The transformable mobile device includes a base, an upper cover, a hinge, a main antenna, and a ground metal plane. The hinge is connected between the base and the upper cover. The main antenna is disposed in the upper cover. The ground metal plane is disposed in the base, or on an outer surface of the base. The ground metal plane includes a main portion and a float portion. The float portion is completely separate from the main portion.

Abstract: A communication device includes a system ground plane, a ground element, an antenna element, and a metal guide line. The ground element is coupled to the system ground plane. The ground element has a first edge, a second edge, and a connection point. The first edge and the second edge are opposite to each other. The connection point is positioned at the second edge. The antenna element is disposed adjacent to, or at, the first edge. One end of the metal guide line is coupled to the connection point, and another end of the metal guide line is open.

Abstract: A mobile device includes a housing, an antenna element, and a stylus. The stylus includes a metal portion. When the stylus is close to the antenna element, the metal portion resonates with the antenna element in an operation frequency band, so as to enhance the radiation efficiency of the antenna element.