An antenna system having a Vivaldi antenna configured to be impedance matched to antenna impedance Za at and above but not below a frequency fc; a Field-Effect-Transistor buffer coupled to the Vivaldi antenna, the length of the coupling between the antenna terminals and the buffer being of a distance much less than a wavelength at frequency fc, the buffer configured to present a high impedance at frequencies substantially <fc, the buffer output impedance further configured to be matched to a system impedance Z0 at frequencies both above and below fc.

An antenna element and an electronic device including the antenna element are provided. The antenna element includes a combiner, a first antenna, a second antenna, a feed, a first connection circuit, a second connection circuit, a first ground circuit, and a second ground circuit. The combiner has a first input terminal electrically connected to the first antenna via the first connection circuit, a second input terminal electrically connected to the second antenna via the second connection circuit, and an output terminal electrically connected to the feed. One end of the first ground circuit is electrically connected to the first antenna. One end of the second ground circuit is electrically connected to the second antenna.

An antenna element and an electronic device including the antenna element are provided. The antenna element includes a combiner, a first antenna, a second antenna, a feed, a first connection circuit, a second connection circuit, a first ground circuit, and a second ground circuit. The combiner has a first input terminal electrically connected to the first antenna via the first connection circuit, a second input terminal electrically connected to the second antenna via the second connection circuit, and an output terminal electrically connected to the feed. One end of the first ground circuit is electrically connected to the first antenna. One end of the second ground circuit is electrically connected to the second antenna.

An antenna system and a mobile terminal, the antenna system includes a metal shell, a system ground, a mainboard and an antenna unit, the system ground is connected with the metal shell; the mainboard is provided with a mainboard ground connected with the system ground, a main circuit and a matching network, the matching network includes a first and second matching element; the main circuit includes a first radio frequency source, a first antenna terminal, a second antenna terminal and a second radio frequency source which are successively connected in series, and at least one matching network is provided between any adjacent two of them, the antenna unit is connected with the mainboard through the first and/or the second antenna terminal, so that the antenna unit is coupled with the top frame or the bottom frame to form a first antenna, a second antenna and a third antenna.

An antenna system and a mobile terminal, the antenna system includes a metal shell, a system ground, a mainboard and an antenna unit, the system ground is connected with the metal shell; the mainboard is provided with a mainboard ground connected with the system ground, a main circuit and a matching network, the matching network includes a first and second matching element; the main circuit includes a first radio frequency source, a first antenna terminal, a second antenna terminal and a second radio frequency source which are successively connected in series, and at least one matching network is provided between any adjacent two of them, the antenna unit is connected with the mainboard through the first and/or the second antenna terminal, so that the antenna unit is coupled with the top frame or the bottom frame to form a first antenna, a second antenna and a third antenna.

A wireless device comprises a radiating structure that comprises a ground plane layer etched on a PCB, including a clearance area nearby one edge of the PCB, and an antenna element mounted on the clearance area. The radiating structure is included in a radiating system that also includes a radiofrequency system comprising at least a matching network, including more than three components. The radiofrequency system connects the antenna element to a feeding line connected at its end to an external port. The antenna element features a maximum length within the 22-30 mm range to match the radiating system in the multiple frequency bands of operation. In general, a radiating system features extended bandwidth, typically including LTE700 bands or below. The antenna element may include two conductive adjacent surfaces with a convex shape connected between them.

A wireless device comprises a radiating structure that comprises a ground plane layer etched on a PCB, including a clearance area nearby one edge of the PCB, and an antenna element mounted on the clearance area. The radiating structure is included in a radiating system that also includes a radiofrequency system comprising at least a matching network, including more than three components. The radiofrequency system connects the antenna element to a feeding line connected at its end to an external port. The antenna element features a maximum length within the 22-30 mm range to match the radiating system in the multiple frequency bands of operation. In general, a radiating system features extended bandwidth, typically including LTE700 bands or below. The antenna element may include two conductive adjacent surfaces with a convex shape connected between them.

The disclosed system may include an antenna and an antenna matching network. The antenna matching network may include an aperture tuner configured to shift a frequency response of the antenna and an impedance tuner configured to dynamically change an amount of radiated power for the antenna. The antenna matching network may be positioned at least a specified minimum distance from the antenna according to various operating characteristics of the antenna. Various other apparatuses, wearable electronic devices, and methods of manufacturing are also disclosed.

The disclosed system may include an antenna and an antenna matching network. The antenna matching network may include an aperture tuner configured to shift a frequency response of the antenna and an impedance tuner configured to dynamically change an amount of radiated power for the antenna. The antenna matching network may be positioned at least a specified minimum distance from the antenna according to various operating characteristics of the antenna. Various other apparatuses, wearable electronic devices, and methods of manufacturing are also disclosed.

The present disclosure provides a dual-band external antenna for an unmanned aerial vehicle (UAV) and a UAV. The dual-band external antenna for the UAV includes a substrate, a low-frequency oscillator region, a high-frequency oscillator region, a feed coaxial line and ground terminals. Two ground terminals are respectively electrically connected to a feed terminal of the feed coaxial line. An avoidance region for arranging the feed coaxial line is disposed in the low-frequency oscillator region or the high-frequency oscillator region. The low-frequency oscillator region includes a first low-frequency oscillator region and a second low-frequency oscillator region. The high-frequency oscillator region includes a first high-frequency oscillator region and a second high-frequency oscillator region that are vertically asymmetrically disposed on the front and back sides of the substrate.