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 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 multi-antenna communication device is provided, including a grounding conductor plane separating a first side space and a second side space and having a first edge. A four-antenna array including first, second, third and fourth antennas is located at the first edge, and has an overall maximum array length extending along the first edge. The first and second antennas are located in the first side space, and the third and fourth antennas are located in the second side space. Each of the first to fourth antennas includes a feeding conductor line, a grounding conductor line, and a radiating conductor portion electrically connected to a signal source through the feeding conductor line and electrically connected to the first edge through the grounding conductor line, thereby forming a loop path and generating at least one resonant mode. The radiating conductor portion has a corresponding projection line segment at the first edge.

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 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: An antenna array includes a ground conductor portion, a first antenna and a second antenna. The ground conductor portion has a first edge and a second edge. The first antenna has a first no-ground radiating area and a first feeding conductor portion. The second antenna has a second no-ground radiating area and a second feeding conductor portion. The first no-ground radiating area is formed and surrounded by a first grounding conductor structure, a second grounding conductor structure, and the first edge, and the first no-ground radiating area has a first breach. The second no-ground radiating area is formed and surrounded by a third grounding conductor structure, a fourth grounding conductor structure, and the second edge, and the second no-ground radiating area has a second breach. The first and second feeding conductor portions are respectively and electrically connected to a first signal source and a second signal source.

Abstract: A multi-antenna communication device is provided, including a grounding conductor plane separating a first side space and a second side space and having a first edge. A four-antenna array including first, second, third and fourth antennas is located at the first edge, and has an overall maximum array length extending along the first edge. The first and second antennas are located in the first side space, and the third and fourth antennas are located in the second side space. Each of the first to fourth antennas includes a feeding conductor line, a grounding conductor line, and a radiating conductor portion electrically connected to a signal source through the feeding conductor line and electrically connected to the first edge through the grounding conductor line, thereby forming a loop path and generating at least one resonant mode. The radiating conductor portion has a corresponding projection line segment at the first edge.

Abstract: An antenna array includes a ground conductor portion, a first antenna and a second antenna. The ground conductor portion has a first edge and a second edge. The first antenna has a first no-ground radiating area and a first feeding conductor portion. The second antenna has a second no-ground radiating area and a second feeding conductor portion. The first no-ground radiating area is formed and surrounded by a first grounding conductor structure, a second grounding conductor structure, and the first edge, and the first no-ground radiating area has a first breach. The second no-ground radiating area is formed and surrounded by a third grounding conductor structure, a fourth grounding conductor structure, and the second edge, and the second no-ground radiating area has a second breach. The first and second feeding conductor portions are respectively and electrically connected to a first signal source and a second signal source.