Techniques for tuning a crossed-field antenna are provided. An example of an antenna system includes a D-plate with a D-plate feed conductor, such that the D-plate is a horizontal conductor raised above and insulated from a ground plane, an E-cylinder with an E-cylinder feed conductor, such that the E-cylinder is a vertical hollow conductive cylinder of smaller diameter than the D-plate, which is mounted concentrically above and insulated from the D-plate, a transmitter tuning circuit configured to receive a signal from a transmitter, an E-cylinder tuning circuit operably coupled to the transmitter tuning circuit and the E-cylinder feed conductor, and a D-plate tuning circuit operably coupled to the transmitter tuning circuit and the D-plate feed conductor.

Techniques for tuning a crossed-field antenna are provided. An example of an antenna system includes a D-plate with a D-plate feed conductor, such that the D-plate is a horizontal conductor raised above and insulated from a ground plane, an E-cylinder with an E-cylinder feed conductor, such that the E-cylinder is a vertical hollow conductive cylinder of smaller diameter than the D-plate, which is mounted concentrically above and insulated from the D-plate, a transmitter tuning circuit configured to receive a signal from a transmitter, an E-cylinder tuning circuit operably coupled to the transmitter tuning circuit and the E-cylinder feed conductor, and a D-plate tuning circuit operably coupled to the transmitter tuning circuit and the D-plate feed conductor.

A film antenna comprises an antenna element having a first electrically conductive layer and an adaptation network that is formed by a second conductive layer.

An antenna includes a first folded dipole having a first central region, and a second folded dipole having a second central region and connected in parallel to the first folded dipole. The antenna further includes a first pair of tuning stubs extending into the first central region of the first folded dipole, and a second pair of tuning stubs extending into the second central region of the second folded dipole.

An antenna includes a first folded dipole having a first central region, and a second folded dipole having a second central region and connected in parallel to the first folded dipole. The antenna further includes a first pair of tuning stubs extending into the first central region of the first folded dipole, and a second pair of tuning stubs extending into the second central region of the second folded dipole.

A radio frequency (RF) apparatus includes a radio frequency integrated circuit (RFIC) chip and an antenna module disposed on an upper surface of the RFIC chip. The antenna module includes a first antenna patch that is in parallel with the RFIC chip, the first antenna patch including a first penetration point, and a first power feed point connected to a first power feed line to transmit and receive a first RF signal of a first frequency band; and a second antenna patch disposed above the first antenna patch in parallel with the first antenna patch, the second antenna patch including a second power feed point connected to a second power feed line that penetrates through the first penetration point to transmit and receive a second RF signal of a second frequency band. The first penetration point is formed in a first region of the first antenna patch in which influence on an electric field generated by the first antenna patch via the first power feed point is minimized.

A mobile device including a ground plane, a grounding branch, wherein a slot is formed between the ground plane and the grounding branch, a connecting element, wherein the grounding branch is electrically coupled through the connecting element to the ground plane and a feeding element, extending across the slot, and electrically coupled between the grounding branch and a signal source, wherein an antenna structure is formed by the grounding branch and the feeding element.

A mobile device including a ground plane, a grounding branch, wherein a slot is formed between the ground plane and the grounding branch, a connecting element, wherein the grounding branch is electrically coupled through the connecting element to the ground plane and a feeding element, extending across the slot, and electrically coupled between the grounding branch and a signal source, wherein an antenna structure is formed by the grounding branch and the feeding element.

An antenna system, including a metal frame including a radiation portion and a grounding portion separately arranged, and a gap zone is defined therebetween; a main board including a system ground, a first radio frequency feeding end and a second radio frequency feeding end; a first conductive member; a second conductive member; a three-in-one antenna unit; and a diversity antenna unit; the three-in-one antenna unit is connected with the first radio frequency feeding end, and the diversity antenna unit is electrically connected with the second radio frequency feeding end; the three-in-one antenna unit and the diversity antenna unit are connected with the radiation portion respectively through the first conductive member and the second conductive member; the radiation portion includes a first grounding point and a second grounding point which are connected with the system ground and arranged between the diversity antenna unit and the three-in-one antenna unit.

An antenna system, including a metal frame including a radiation portion and a grounding portion separately arranged, and a gap zone is defined therebetween; a main board including a system ground, a first radio frequency feeding end and a second radio frequency feeding end; a first conductive member; a second conductive member; a three-in-one antenna unit; and a diversity antenna unit; the three-in-one antenna unit is connected with the first radio frequency feeding end, and the diversity antenna unit is electrically connected with the second radio frequency feeding end; the three-in-one antenna unit and the diversity antenna unit are connected with the radiation portion respectively through the first conductive member and the second conductive member; the radiation portion includes a first grounding point and a second grounding point which are connected with the system ground and arranged between the diversity antenna unit and the three-in-one antenna unit.