According to various embodiments, an electronic apparatus comprises: a housing comprising at least one conductive portion arranged through at least one non-conductive portion; a substrate arranged in an internal space of the housing and comprising a ground; a wireless communication circuit arranged on the substrate and capacitively coupled to a first point of the at least one conductive portion; the first point being located at a first electric distance from the at least one non-conductive portion, through a first electric path; and a variable circuit arranged on a second electric path branched from the first electric path and connected to the ground, wherein the at least one conductive portion is connected to the ground through a third electric path at a second point further from the at least one non-conductive portion than the first point, and the first electric distance may be shorter than a second electric distance from the first point to the second point.

An antenna tuning circuit is disclosed. The antenna tuning circuit is configured to make multiple estimates on an antenna impedance at an antenna port and determine an optimum tuning state for antenna tuning based on the antenna impedance estimates. The antenna tuning circuit may be further configured according to various embodiments of the present disclosure to minimize impedance estimation error, reduce magnitude and/or phase disturbance during antenna tuning, and extrapolate antenna impedance estimates for both transmit and receive frequencies. As a result, the antenna tuning circuit can accomplish autonomous antenna tuning optimization to thereby improve transmit and receive performance in a wireless communication device.

An antenna tuning circuit is disclosed. The antenna tuning circuit is configured to make multiple estimates on an antenna impedance at an antenna port and determine an optimum tuning state for antenna tuning based on the antenna impedance estimates. The antenna tuning circuit may be further configured according to various embodiments of the present disclosure to minimize impedance estimation error, reduce magnitude and/or phase disturbance during antenna tuning, and extrapolate antenna impedance estimates for both transmit and receive frequencies. As a result, the antenna tuning circuit can accomplish autonomous antenna tuning optimization to thereby improve transmit and receive performance in a wireless communication device.

A wireless device includes at least one slim radiating system having a slim radiating structure and a radio-frequency system. The slim radiating structure includes one or more booster bars. The booster bar has slim width and height factors that facilitate its integration within the wireless device and the excitation of a resonant mode in the ground plane layer, and has a location factor that enables it to achieve the most favorable radio-frequency performance for the available space to allocate the booster bar. The at least one slim radiating system may be configured to transmit and receive electromagnetic wave signals in one or more frequency regions of the electromagnetic spectrum.

An apparatus, including: an antenna interface, comprising: a first transformer including a first transmission line coupled to a second transmission line, wherein the first transmission line includes first and second ends configured to couple to a first communication device and a reference potential electrode, respectively, and wherein the second transmission line includes first and second ends configured to couple to an antenna and a second communication device, respectively; and a second transformer including a third transmission line coupled to a fourth transmission line, wherein the third transmission line includes first and second ends configured to couple to the first communication device and the reference potential electrode, respectively, and wherein the fourth transmission line includes first and second ends configured to couple to the second communication device and a ballast load, respectively.

An antenna apparatus includes a radiation shield between an antenna element and at least one radio frequency integrated circuit (RFIC) coupled to the antenna element. An antenna substrate includes a first dielectric layer having opposite first and second surfaces, and a first metallization layer attached to the second surface to form a ground plane. A base substrate includes at least one second dielectric layer having opposite third and fourth surfaces, and a second metallization layer having a first side attached to the third surface and a second side attached to the first metallization layer to form the radiation shield. The RFIC is RF coupled to the antenna element through at least one via extending through the base substrate and a coupling element within aligned openings of the first and second metallization layers.

A user equipment (UE) is provided that includes an antenna switch array for demultiplexing a reference signal sequentially to each antenna in a plurality of antennas. While the antenna switch array selects an antenna, the UE measures a reflection coefficient for the antenna. The UE then tunes the antenna responsive to the reflection coefficient measurement.

A user equipment (UE) is provided that includes an antenna switch array for demultiplexing a reference signal sequentially to each antenna in a plurality of antennas. While the antenna switch array selects an antenna, the UE measures a reflection coefficient for the antenna. The UE then tunes the antenna responsive to the reflection coefficient measurement.

The present disclosure relates to a base station antenna. comprising: a reflector: a first frequency band radiating element located on the front side of the reflector; and a feed board located on the front side of the reflector. the feed board being configured to feed the first frequency band radiating element, in which. a resonant circuit in a grounding path of the first frequency band radiating clement is formed on the feed board, and the resonant circuit is configured to at least suppress current within a second frequency band different from the first frequency band (FIG. 2a).

The present disclosure relates to a base station antenna. comprising: a reflector: a first frequency band radiating element located on the front side of the reflector; and a feed board located on the front side of the reflector. the feed board being configured to feed the first frequency band radiating element, in which. a resonant circuit in a grounding path of the first frequency band radiating clement is formed on the feed board, and the resonant circuit is configured to at least suppress current within a second frequency band different from the first frequency band (FIG. 2a).