An antenna structure, PCB and mobile terminal for Sub-6G. The antenna structure includes a first branch and a second branch. The first branch includes an L-shaped arm and a first longitudinal arm extending outwardly from the PCB. The first longitudinal arm is connected to the ground of the PCB. One end of the L-shaped arm is connected to the end of the first longitudinal arm. The second branch is L-shaped, and one end of the second branch is connected to the antenna feed point of the PCB. At least one microstrip line is connected between the first longitudinal arm and the second branch.

An antenna structure, PCB and mobile terminal for Sub-6G. The antenna structure includes a first branch and a second branch. The first branch includes an L-shaped arm and a first longitudinal arm extending outwardly from the PCB. The first longitudinal arm is connected to the ground of the PCB. One end of the L-shaped arm is connected to the end of the first longitudinal arm. The second branch is L-shaped, and one end of the second branch is connected to the antenna feed point of the PCB. At least one microstrip line is connected between the first longitudinal arm and the second branch.

Antennas with tunable elements and methods for using the same are disclosed. In some embodiments, an antenna comprises: a plurality of radio-frequency (RF) radiating antenna elements, wherein each antenna element of the plurality of RF radiating antenna elements comprises a tunable element, circuitry connected to the tuning element to set a voltage on the tunable element. In some embodiments, the circuitry comprises a voltage storage structure, a first transistor having a first gate connected to the voltage storage structure, a first source connected to the tunable element, and a first drain for coupling to a constant voltage source, and a data voltage input terminal operable to apply a voltage to the voltage storage structure and to the first gate to determine current through the first transistor.

Antennas with tunable elements and methods for using the same are disclosed. In some embodiments, an antenna comprises: a plurality of radio-frequency (RF) radiating antenna elements, wherein each antenna element of the plurality of RF radiating antenna elements comprises a tunable element, circuitry connected to the tuning element to set a voltage on the tunable element. In some embodiments, the circuitry comprises a voltage storage structure, a first transistor having a first gate connected to the voltage storage structure, a first source connected to the tunable element, and a first drain for coupling to a constant voltage source, and a data voltage input terminal operable to apply a voltage to the voltage storage structure and to the first gate to determine current through the first transistor.

An antenna that enables dense packing of radiators includes a plurality of first radiators configured to radiate in a first frequency band and a plurality of second radiators configured to radiate in a second frequency band, the second frequency band having higher frequencies than the first frequency band. each of the plurality of first radiators includes a plurality of dipole arms. Each of the plurality of dipole arms includes a periodic pattern of inductive choke segments, and each of the dipole arms has a broken peripheral current path.

An antenna that enables dense packing of radiators includes a plurality of first radiators configured to radiate in a first frequency band and a plurality of second radiators configured to radiate in a second frequency band, the second frequency band having higher frequencies than the first frequency band. each of the plurality of first radiators includes a plurality of dipole arms. Each of the plurality of dipole arms includes a periodic pattern of inductive choke segments, and each of the dipole arms has a broken peripheral current path.

A frequency debugging board includes a bottom plate; a variable capacitor and a plurality of first probes that are all disposed on the bottom plate, two ends of the variable capacitor being each connected to a first probe; and a plurality of second probes and at least one switch that are all disposed on the bottom plate, any two adjacent second probes being connected to each other through a switch.

A wearable ring includes an inner surface and an outer surface; a first antenna component and a second antenna component, each disposed between the inner surface and the outer surface; a first electrical circuit connecting a first end portion of the first antenna component with a first end portion of the second antenna component; and a second electrical circuit connecting a second end portion of the first antenna component with a second end portion of the second antenna component, and wherein, based on configuration of the first electrical circuit and the second electrical circuit, the first antenna component and second antenna component are configured to operate in a given frequency band.

A unit cell can be used for a metasurface, metamaterial, or beamforming antenna. The unit cell includes a metal layer attached to a substrate. The metal layer defines an iris opening for the unit cell. One or more tunable capacitance devices are positioned within or across the iris opening. Each tunable capacitance device is to tune resonance frequency of the unit cell. Mass transfer technologies or self-assembly processes may be used to position the tunable capacitance devices.

A unit cell can be used for a metasurface, metamaterial, or beamforming antenna. The unit cell includes a metal layer attached to a substrate. The metal layer defines an iris opening for the unit cell. One or more tunable capacitance devices are positioned within or across the iris opening. Each tunable capacitance device is to tune resonance frequency of the unit cell. Mass transfer technologies or self-assembly processes may be used to position the tunable capacitance devices.