An electronic device may have an upper housing and a lower housing separated by a slow. A substrate may be mounted in the lower housing and may have an inner surface facing an interior of the lower housing and an outer surface facing the slot. Ventilation port openings may extend from the outer surface to the inner surface. Ribs in the substrate may separate the ventilation port openings. The ribs may include notches at the inner surface. An antenna may include conductive traces within multiple ventilation port openings and extending through the notches. The conductive traces may be offset from the outer surface. The outer surface of the substrate may be free from conductive material from the antenna. This may serve to maximize antenna efficiency while protecting the antenna from external forces and debris or other contaminants that pass through the slot during use of the electronic device over time.

An electronic device may have an upper housing and a lower housing separated by a slow. A substrate may be mounted in the lower housing and may have an inner surface facing an interior of the lower housing and an outer surface facing the slot. Ventilation port openings may extend from the outer surface to the inner surface. Ribs in the substrate may separate the ventilation port openings. The ribs may include notches at the inner surface. An antenna may include conductive traces within multiple ventilation port openings and extending through the notches. The conductive traces may be offset from the outer surface. The outer surface of the substrate may be free from conductive material from the antenna. This may serve to maximize antenna efficiency while protecting the antenna from external forces and debris or other contaminants that pass through the slot during use of the electronic device over time.

Described are electronic devices, and specifically provides a multi-frequency slot antenna, a terminal device and an antenna resonance frequency adjustment method. The antenna is applied to a terminal device, and the terminal device includes a metal casing. According to an example, the antenna includes a slot provided in the metal casing, the slot having a first end and a second end opposite to each other in a length direction; a feed terminal across inside of the slot and located between the first end and the second end; and a capacitor provided in the slot, two electrodes of the capacitor being respectively connected with two sides of the slot in a width direction. Furthermore, in the length direction, the capacitor is located at a position where voltages are not zero at original values of multiple orders of resonance frequencies of the antenna when the capacitor is not provided in the slot. In this way, an operating frequency of the antenna includes multiple orders of resonance frequencies.

Described are electronic devices, and specifically provides a multi-frequency slot antenna, a terminal device and an antenna resonance frequency adjustment method. The antenna is applied to a terminal device, and the terminal device includes a metal casing. According to an example, the antenna includes a slot provided in the metal casing, the slot having a first end and a second end opposite to each other in a length direction; a feed terminal across inside of the slot and located between the first end and the second end; and a capacitor provided in the slot, two electrodes of the capacitor being respectively connected with two sides of the slot in a width direction. Furthermore, in the length direction, the capacitor is located at a position where voltages are not zero at original values of multiple orders of resonance frequencies of the antenna when the capacitor is not provided in the slot. In this way, an operating frequency of the antenna includes multiple orders of resonance frequencies.

Waveguide and/or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, an antenna module may comprise a waveguide and an antenna structure, such as one or more slots/slits operably coupled with the waveguide groove. The antenna structure may be positioned and configured to deliver electromagnetic radiation from the waveguide therethrough. A plurality of tapering surfaces may be formed along the antenna structure. Each of the plurality of tapering surfaces may be formed so as to alternate between opposing sides of the antenna structure and be spaced apart from each adjacent tapering surface of the plurality of tapering surfaces.

Waveguide and/or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, an antenna module may comprise a waveguide and an antenna structure, such as one or more slots/slits operably coupled with the waveguide groove. The antenna structure may be positioned and configured to deliver electromagnetic radiation from the waveguide therethrough. A plurality of tapering surfaces may be formed along the antenna structure. Each of the plurality of tapering surfaces may be formed so as to alternate between opposing sides of the antenna structure and be spaced apart from each adjacent tapering surface of the plurality of tapering surfaces.

Embodiments provide mobile device comprising a body frame; processing circuitry affixed to the body frame; a first antenna and a second antenna arranged adjacent to each other in the body frame, the first antenna and the second antenna electrically coupled to the processing circuitry to provide radiation, wherein the first antenna and the second antenna share a common ground defined by the body frame, wherein the first antenna is configured to provide radiation of a first polarization, and wherein the second antenna is configured to provide radiation of a second polarization substantially orthogonal to the first polarization to provide a signal isolation between the first antenna and the second antenna.

Embodiments provide mobile device comprising a body frame; processing circuitry affixed to the body frame; a first antenna and a second antenna arranged adjacent to each other in the body frame, the first antenna and the second antenna electrically coupled to the processing circuitry to provide radiation, wherein the first antenna and the second antenna share a common ground defined by the body frame, wherein the first antenna is configured to provide radiation of a first polarization, and wherein the second antenna is configured to provide radiation of a second polarization substantially orthogonal to the first polarization to provide a signal isolation between the first antenna and the second antenna.

A split-ring resonator comprises a first ground terminal which is separated from a ground pattern.

An electronic device and an antenna structure are provided. The electronic device includes a metal housing, a partition wall, a first antenna module, and a second antenna module. The metal housing has a T-shaped slot. The slot includes an opening end, a first closed end, and a second closed end. The partition wall is connected with the metal housing. The first antenna module has a first feeding element and a radiating element. The second antenna module has a second feeding element and an antenna array. The first antenna module and the second antenna module are respectively disposed on two sides of the partition wall, and the first antenna module is closer to the opening end than the second antenna module.