An antenna module includes a dielectric substrate having a multilayer structure, an antenna element and a ground electrode that are arranged at the dielectric substrate, and a matching circuit that is formed in a region between the antenna element and the ground electrode. A radio frequency signal is supplied via the matching circuit to the antenna element.

An antenna module includes a dielectric substrate having a multilayer structure, an antenna element and a ground electrode that are arranged at the dielectric substrate, and a matching circuit that is formed in a region between the antenna element and the ground electrode. A radio frequency signal is supplied via the matching circuit to the antenna element.

A feed for a dual-band antenna, comprising: a first waveguide for low frequency electromagnetic radiations, a second dielectric waveguide for high frequency electromagnetic radiations, an end connected to a low band port configured to pass said low frequency electromagnetic radiations, and a high band port configured to pass said high frequency electromagnetic radiations, wherein the first waveguide comprises a first longitudinal section and a second longitudinal section, wherein a minimal distance between an internal surface of walls of the first section and an external surface of walls of the second dielectric waveguide is D.sub.11 along a lateral direction orthogonal to the longitudinal direction, and wherein a maximal distance between an internal surface of at least one first wall of the second section and an external surface of a wall of the second dielectric waveguide facing said first wall is D.sub.12 along said lateral direction, wherein D.sub.12<D.sub.11.

A feed for a dual-band antenna, comprising: a first waveguide for low frequency electromagnetic radiations, a second dielectric waveguide for high frequency electromagnetic radiations, an end connected to a low band port configured to pass said low frequency electromagnetic radiations, and a high band port configured to pass said high frequency electromagnetic radiations, wherein the first waveguide comprises a first longitudinal section and a second longitudinal section, wherein a minimal distance between an internal surface of walls of the first section and an external surface of walls of the second dielectric waveguide is D.sub.11 along a lateral direction orthogonal to the longitudinal direction, and wherein a maximal distance between an internal surface of at least one first wall of the second section and an external surface of a wall of the second dielectric waveguide facing said first wall is D.sub.12 along said lateral direction, wherein D.sub.12<D.sub.11.

An antenna structure includes a housing and at least one switching circuit. The housing includes a border frame made of metal including at least one gap dividing the border frame into at least two radiating portions. The at least one switching circuit is mounted to the at least one gap and electrically coupled to the at least two radiating portions on opposite sides of the at least one switching circuit. The at least one switching circuit is controlled to switch between an open circuit state and a closed circuit state. A length of the at least two radiating portions is changed by the at least one switching circuit switched between the open circuit state and the closed circuit state to adjust a bandwidth of the antenna structure.

An antenna structure includes a housing and at least one switching circuit. The housing includes a border frame made of metal including at least one gap dividing the border frame into at least two radiating portions. The at least one switching circuit is mounted to the at least one gap and electrically coupled to the at least two radiating portions on opposite sides of the at least one switching circuit. The at least one switching circuit is controlled to switch between an open circuit state and a closed circuit state. A length of the at least two radiating portions is changed by the at least one switching circuit switched between the open circuit state and the closed circuit state to adjust a bandwidth of the antenna structure.

A mobile device includes a hybrid antenna, a tunable circuit element, an RF (Radio Frequency) module, and a proximity sensor. The tunable circuit element provides an impedance value. The RF module generates RF power. The hybrid antenna is coupled through the tunable circuit element to the RF module. The proximity sensor is respectively coupled to the hybrid antenna, the tunable circuit element, and the RF module, and is configured to detect a specific distance between the hybrid antenna and a conductive element. The tunable circuit element and the RF module are operated according to relative information of the specific distance. If the specific distance is shorter than or equal to a first threshold distance, the RF module will reduce the RF power. If the specific distance is shorter than or equal to a second threshold distance, the tunable circuit element will change the impedance value.

A mobile device includes a hybrid antenna, a tunable circuit element, an RF (Radio Frequency) module, and a proximity sensor. The tunable circuit element provides an impedance value. The RF module generates RF power. The hybrid antenna is coupled through the tunable circuit element to the RF module. The proximity sensor is respectively coupled to the hybrid antenna, the tunable circuit element, and the RF module, and is configured to detect a specific distance between the hybrid antenna and a conductive element. The tunable circuit element and the RF module are operated according to relative information of the specific distance. If the specific distance is shorter than or equal to a first threshold distance, the RF module will reduce the RF power. If the specific distance is shorter than or equal to a second threshold distance, the tunable circuit element will change the impedance value.

Embodiments of the present invention provide an antenna structure for a mobile terminal. The antenna structure comprises a first antenna to a sixth antenna, a matching circuit, and a feed point; a spacer region is provided between the first antenna and the second antenna; a fourth antenna is disposed on one side of the spacer region, the fifth and fourth antennas are disposed opposite to each other, and the third antenna and the feed point are disposed on the side edge of the fifth antenna; the fifth, sixth and third antennas are electrically connected, and the matching circuit is connected to the fifth antenna, the sixth antenna, the third antenna, and the feed point.

Embodiments of the present invention provide an antenna structure for a mobile terminal. The antenna structure comprises a first antenna to a sixth antenna, a matching circuit, and a feed point; a spacer region is provided between the first antenna and the second antenna; a fourth antenna is disposed on one side of the spacer region, the fifth and fourth antennas are disposed opposite to each other, and the third antenna and the feed point are disposed on the side edge of the fifth antenna; the fifth, sixth and third antennas are electrically connected, and the matching circuit is connected to the fifth antenna, the sixth antenna, the third antenna, and the feed point.