Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, and a fifth radiation element. The first radiation element has a feeding point. The second radiation element is coupled to the feeding point. The second radiation element is at least partially surrounded by the first radiation element. The third radiation element is coupled to a ground voltage. The fourth radiation element is coupled to the third radiation element. The fifth radiation element is coupled to the third radiation element. The fifth radiation element is at least partially surrounded by the third radiation element and the fourth radiation element.

Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, and a fifth radiation element. The first radiation element has a feeding point. The second radiation element is coupled to the feeding point. The second radiation element is at least partially surrounded by the first radiation element. The third radiation element is coupled to a ground voltage. The fourth radiation element is coupled to the third radiation element. The fifth radiation element is coupled to the third radiation element. The fifth radiation element is at least partially surrounded by the third radiation element and the fourth radiation element.

Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a nonconductive support element. The first radiation element has a feeding point. The second radiation element is coupled to the feeding point. The third radiation element has a grounding point. The fourth radiation element is coupled to the third radiation element. The fourth radiation element is adjacent to the first radiation element and the second radiation element. The fifth radiation element is coupled to the third radiation element and the fourth radiation element. The first radiation element, the second radiation element, the third radiation element, the fourth radiation element, and the fifth radiation element are disposed on the nonconductive support element.

Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a nonconductive support element. The first radiation element has a feeding point. The second radiation element is coupled to the feeding point. The third radiation element has a grounding point. The fourth radiation element is coupled to the third radiation element. The fourth radiation element is adjacent to the first radiation element and the second radiation element. The fifth radiation element is coupled to the third radiation element and the fourth radiation element. The first radiation element, the second radiation element, the third radiation element, the fourth radiation element, and the fifth radiation element are disposed on the nonconductive support element.

Abstract: An antenna system includes a dielectric substrate, a ground plane, and a first antenna array. The ground plane is disposed on a second surface of the dielectric substrate. The first antenna array is disposed on a first surface of the dielectric substrate. The first antenna array includes a first transmission line, a first antenna element, a second antenna element, a third antenna element, a fourth antenna element, a fifth antenna element, and a sixth antenna element. The first transmission line has a first feeding point and is coupled to the first antenna element, the second antenna element, the third antenna element, the fourth antenna element, the fifth antenna element, and the sixth antenna element. The first antenna element, the second antenna element, the third antenna element, the fourth antenna element, the fifth antenna element, and the sixth antenna element are all substantially arranged in a first straight line.

Abstract: An antenna structure includes a first radiation element, a second radiation element, and a third radiation element. The first radiation element has a feeding point. The third radiation element is coupled through the second radiation element to the first radiation element. The third radiation element has a first opening and a second opening which are separate from each other. The antenna structure covers a first frequency band, a second frequency band, and a third frequency band.

Abstract: An antenna structure includes a first radiation element, a second radiation element, and a third radiation element. The first radiation element has a feeding point. The third radiation element is coupled through the second radiation element to the first radiation element. The third radiation element has a first opening and a second opening which are separate from each other. The antenna structure covers a first frequency band, a second frequency band, and a third frequency band.

Abstract: An antenna system includes a dielectric substrate, a ground plane, and a first antenna array. The ground plane is disposed on a second surface of the dielectric substrate. The first antenna array is disposed on a first surface of the dielectric substrate. The first antenna array includes a first transmission line, a first antenna element, a second antenna element, a third antenna element, a fourth antenna element, a fifth antenna element, and a sixth antenna element. The first transmission line has a first feeding point and is coupled to the first antenna element, the second antenna element, the third antenna element, the fourth antenna element, the fifth antenna element, and the sixth antenna element. The first antenna element, the second antenna element, the third antenna element, the fourth antenna element, the fifth antenna element, and the sixth antenna element are all substantially arranged in a first straight line.

Abstract: An antenna structure includes a dielectric substrate and a metal element. The metal element is disposed on the dielectric substrate, and includes a transmission element and a radiation element. A first triangular hollow region and a second triangular hollow region are formed on the radiation element.

Abstract: An antenna structure includes a dielectric substrate and a metal element. The metal element is disposed on the dielectric substrate, and includes a transmission element and a radiation element. A first triangular hollow region and a second triangular hollow region are formed on the radiation element.

Abstract: An antenna module is provided. The antenna module includes a radiator, a feed conductor, a ground element, a ground conductor and a short conductor. The feed conductor is connected to the radiator. The ground conductor connects the radiator to the ground element. The short conductor connects the feed conductor to the ground conductor.

Abstract: A mobile communication device including a system ground plane, an antenna, a signal distributor, a transceiver and a sensing controller is provided. The antenna converts an electromagnetic wave to a radio-frequency signal. Besides, the antenna and the system ground plane form a sensing capacitor to detect an object and generate a detecting signal accordingly. The signal distributor is electrically connected to the antenna through a first connection terminal and a second connection terminal and guides the radio-frequency signal and the detecting signal from the antenna to a third connection terminal and a fourth connection terminal. The transceiver is electrically connected to the third connection terminal and processes the radio-frequency signal. The sensing controller is electrically connected to the fourth connection terminal and determines whether the object exists around the antenna according to the sensing signal.

Abstract: A mobile communication device including a main board, a flexible printed circuit board (FPCB) and a transmission line. The main board includes a central process unit (CPU) disposed on the main board for outputting and receiving a control signal, and a wireless transmitter disposed on the main board and coupled to the CPU for modulating and demodulating a wireless signal. The FPCB is coupled to the CPU to operate as an antenna for transmitting the control signal and radiating and receiving the wireless signal. The FPCB includes a transmission unit coupled to the CPU for transmitting the control signal, a radiation unit for radiating and receiving the wireless signal, and a feed point formed on the radiation unit for feeding the wireless signal to the radiation unit. The transmission line is coupled between the feed point and the wireless transmitter for transmitting the wireless signal.

Abstract: A mobile communication device including a system ground plane, an antenna, a signal distributor, a transceiver and a sensing controller is provided. The antenna converts an electromagnetic wave to a radio-frequency signal. Besides, the antenna and the system ground plane form a sensing capacitor to detect an object and generate a detecting signal accordingly. The signal distributor is electrically connected to the antenna through a first connection terminal and a second connection terminal and guides the radio-frequency signal and the detecting signal from the antenna to a third connection terminal and a fourth connection terminal. The transceiver is electrically connected to the third connection terminal and processes the radio-frequency signal. The sensing controller is electrically connected to the fourth connection terminal and determines whether the object exists around the antenna according to the sensing signal.

Abstract: An antenna module is provided. The antenna module includes a radiator, a feed conductor, a ground element, a ground conductor and a short conductor. The feed conductor is connected to the radiator. The ground conductor connects the radiator to the ground element. The short conductor connects the feed conductor to the ground conductor.