A reconfigurable antenna system is described which combines active and passive components used to impedance match, alter the frequency response, and change the radiation pattern of an antenna. Re-use of components such as switches and tunable capacitors make the circuit topologies more space and cost effective, while reducing complexity of the control signaling required. Antenna structures with single and multiple feed and/or ground connections are described and active circuit topologies are shown for these configurations. A processor and algorithm can reside with the antenna circuitry, or the algorithm to control antenna optimization can be implemented in a processor in the host device.

An antenna device includes a body and at least one external antenna. The body includes a processor and a sensor electrically connected to the processor. The processor is configured to receive a sensing signal from the sensor. The external antenna is externally connected to the body at an adjustable angle, and includes a first antenna, a second antenna, and a switch. The switch is electrically connected to the processor, and is switchably electrically connected to the first antenna and the second antenna. When the sensor senses that the external antenna is at a first angle or a second angle relative to the body, the processor switches the switch electrically connected to the first antenna or the second antenna according to the sensing signal, so that the external antenna has a first radiation pattern or a second radiation pattern.

An antenna device includes a body and at least one external antenna. The body includes a processor and a sensor electrically connected to the processor. The processor is configured to receive a sensing signal from the sensor. The external antenna is externally connected to the body at an adjustable angle, and includes a first antenna, a second antenna, and a switch. The switch is electrically connected to the processor, and is switchably electrically connected to the first antenna and the second antenna. When the sensor senses that the external antenna is at a first angle or a second angle relative to the body, the processor switches the switch electrically connected to the first antenna or the second antenna according to the sensing signal, so that the external antenna has a first radiation pattern or a second radiation pattern.

An antenna apparatus and an electronic device. The antenna apparatus includes a feed source, a transmission line, a first radiator including a first feed point, and a second radiator including a second feed point. The transmission line is electrically connected to the feed source. A second end part of the second radiator is disposed away from the first radiator compared to the first end part of the second radiator, a first gap is formed between the first end part of the first radiator and the first end part of the second radiator, the first end part of the first radiator is a ground end, and the first end part of the second radiator is an open end. The two feed points are electrically connected to the transmission line, and the transmission line input a radio frequency signal in a same frequency band to the two feed points.

An antenna apparatus and an electronic device. The antenna apparatus includes a feed source, a transmission line, a first radiator including a first feed point, and a second radiator including a second feed point. The transmission line is electrically connected to the feed source. A second end part of the second radiator is disposed away from the first radiator compared to the first end part of the second radiator, a first gap is formed between the first end part of the first radiator and the first end part of the second radiator, the first end part of the first radiator is a ground end, and the first end part of the second radiator is an open end. The two feed points are electrically connected to the transmission line, and the transmission line input a radio frequency signal in a same frequency band to the two feed points.

Systems, apparatuses, and methods for multiple channel wireless charging power delivery are provided. For example, a poller device may charge multiple listener devices. A poller device may have a separate antenna interface channel and separately poller antenna for each listener device. The poller device may include a poller transmitter that may generate distinct charge signals for each antenna interface channels that may be used to generate an electromagnetic field poller antennas. Each separate poller antenna may generate a distinct electromagnetic field to power the associated listener device. Each antenna interface channel may include one or more automatic antenna tuners that may be used to dynamically and separately tune each antenna interface channel. The poller device and listener devices may use NFC links to determine which listener devices may be charged as well as the level of charging to provide.

Systems, apparatuses, and methods for multiple channel wireless charging power delivery are provided. For example, a poller device may charge multiple listener devices. A poller device may have a separate antenna interface channel and separately poller antenna for each listener device. The poller device may include a poller transmitter that may generate distinct charge signals for each antenna interface channels that may be used to generate an electromagnetic field poller antennas. Each separate poller antenna may generate a distinct electromagnetic field to power the associated listener device. Each antenna interface channel may include one or more automatic antenna tuners that may be used to dynamically and separately tune each antenna interface channel. The poller device and listener devices may use NFC links to determine which listener devices may be charged as well as the level of charging to provide.

An apparatus comprises an antenna element operable in multiple frequency bands and configured to be connected to a ground plane and to a radiofrequency system to provide impedance matching at the multiple frequency bands, where the radiofrequency system comprising at least a matching network. A maximum length of the antenna element is shorter than L/12 but longer than L/22, where L is the free-space wavelength corresponding to a lowest frequency related to a lowest frequency region of operation of the antenna element. A contour of the antenna element has a complexity factor F12 less than 1.25.

An apparatus comprises an antenna element operable in multiple frequency bands and configured to be connected to a ground plane and to a radiofrequency system to provide impedance matching at the multiple frequency bands, where the radiofrequency system comprising at least a matching network. A maximum length of the antenna element is shorter than L/12 but longer than L/22, where L is the free-space wavelength corresponding to a lowest frequency related to a lowest frequency region of operation of the antenna element. A contour of the antenna element has a complexity factor F12 less than 1.25.

A mobile device comprises a touch screen and a frame antenna. The touch screen have a first sensing module. The frame antenna is disposed around the periphery of the touch screen, and the frame antenna further has at least one second sensing module, wherein the first sensing module and the at least one second sensing module form at least one mutual-capacitive sensing loop to sense whether an object approaches or touches the touch screen and the frame antenna.