This document describes low-footprint dual-band ultra-wideband (UWB) antenna modules. A described UWB antenna module may be used as an internal part of a mobile device (e.g., cellphone, tablet, and/or other mobile devices). The UWB antenna module includes a multi-layer dual-band antenna that includes a set of multi-layer patch antennas, each patch antenna including a layer with a conductive ground plate, a feeding plate layer, and a parasitic strip layer with two parasitic strips, one configured to resonate at a frequency within a first band of the dual-band antenna, the other configured to resonate at a frequency within a second band of the dual-band antenna. The parasitic strips are electromagnetically coupled to the feeding plate.

An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

A display device includes a display panel in which an active area and a peripheral area are defined, and an antenna unit including a main pattern, a first sub-pattern, and an antenna line. The main pattern is disposed on the display panel in the active area, transmits and/or receives a signal, and operates at a first frequency. The first sub-pattern is disposed on the display panel in the active area, is spaced apart from the main pattern in a first direction, is capacitively coupled to the main pattern, and operates at a second frequency different from the first frequency.

An electronic device may include a rear housing wall, antenna resonating element, sensor board, and grounding ring. The grounding ring may couple antenna currents from the resonating element onto a ground trace on the sensor board. A switchable inductor may couple the grounding ring to the ground traces. The switchable inductor may be used to tune a frequency response of the antenna in a cellular low band. Additionally or alternatively, an inductor may couple the resonating element to the ground traces or other portions of an antenna ground. This inductor may serve to extend the effective length of the antenna resonating element in the cellular low band to compensate for dielectric loading by the rear housing wall, such as in examples where the rear housing wall is formed from zirconia.

An electronic device includes a substrate and an antenna apparatus. The substrate includes a grounding area. The antenna apparatus includes a first radiating element, a second radiating element, a third radiating element, a first feeding structure, and a second feeding structure that are disposed in the clearance area adjacent to the grounding area. The first radiating element and the grounding area jointly form a slot antenna. The second radiating element is separated from the grounding area. The first feeding structure and the second feeding structure are located at the clearance area and are grounded. The second feeding structure is electrically coupled between the third radiating element and the ground. The antenna apparatus feeds a radiating element using the first feeding structure and the second feeding structure to obtain resonance modes at different frequencies, thereby implementing a dual-band dual-antenna function.

An electronic device includes a substrate and an antenna apparatus. The substrate includes a grounding area. The antenna apparatus includes a first radiating element, a second radiating element, a third radiating element, a first feeding structure, and a second feeding structure that are disposed in the clearance area adjacent to the grounding area. The first radiating element and the grounding area jointly form a slot antenna. The second radiating element is separated from the grounding area. The first feeding structure and the second feeding structure are located at the clearance area and are grounded. The second feeding structure is electrically coupled between the third radiating element and the ground. The antenna apparatus feeds a radiating element using the first feeding structure and the second feeding structure to obtain resonance modes at different frequencies, thereby implementing a dual-band dual-antenna function.

An electronic device may have an antenna embedded in a substrate. The substrate may have first layers, second layers on the first layers, and third layers on the second layers. The antenna may include a first patch on the first layers that radiates in a first band, a second patch on the second antenna layers that radiates in a second band, and a parasitic patch on the third layers. A short path may couple ground to a location on the first patch that allows the first patch to form a ground extension in the second band for the second patch without affecting performance of the first patch in the first band. The first layers may have a higher dielectric permittivity than the second and third layers to minimize the thickness of the substrate without requiring a separate dielectric loading layer over the substrate.

An antenna is provided with a dielectric layer, a metal layer provided on one surface of the dielectric layer, a radiation element provided on the other surface of the dielectric layer, the radiation element including a slit portion in a central portion, a radiation system of which is magnetic field current radiation by electric field induction, a contactless feed element arranged above the slit portion, and a parasitic radiation element, a radiation system of which is electric field current radiation by magnetic field induction.

An antenna is provided with a dielectric layer, a metal layer provided on one surface of the dielectric layer, a radiation element provided on the other surface of the dielectric layer, the radiation element including a slit portion in a central portion, a radiation system of which is magnetic field current radiation by electric field induction, a contactless feed element arranged above the slit portion, and a parasitic radiation element, a radiation system of which is electric field current radiation by magnetic field induction.