A transmitting circuit. In some embodiment, the transmitting circuit includes a slot antenna and an amplifier. The slot antenna may include a slot in a conductive sheet, and it may have a first resonant frequency, the first resonant frequency being within 20% of a slot frequency which is between a first frequency corresponding, in a first volume, to a wavelength twice the length of the slot, and a second frequency corresponding, in a second volume, to a wavelength twice the length of the slot. The amplifier may be connected to the slot through a connection including a conductive path, between the amplifier and the slot, having a length less than 0.2 times the length of the slot. The magnitude of the output impedance of the amplifier may be less than 0.25 times the magnitude of the impedance of the slot antenna at a first resonant frequency.

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.

The antenna device includes a substrate, a first radiator that is in a plane shape, operates as a wideband antenna, and is disposed on the dielectric region such that one end portion faces the ground region and an opposite end portion faces away from the ground region, a width of the opposite end portion being wider than a width of the one end portion, a second radiator that is in a line shape, operates as a narrowband antenna and at a lower frequency than the first radiator, and is disposed adjacent to the first radiator on the dielectric region such that one end portion faces the ground region and an opposite end portion faces away from the ground region, a first feeding line, a second feeding line, and a connecting structure connected with the first radiator, the first feeding line, the second radiator, and the second feeding line.

The antenna device includes a substrate, a first radiator that is in a plane shape, operates as a wideband antenna, and is disposed on the dielectric region such that one end portion faces the ground region and an opposite end portion faces away from the ground region, a width of the opposite end portion being wider than a width of the one end portion, a second radiator that is in a line shape, operates as a narrowband antenna and at a lower frequency than the first radiator, and is disposed adjacent to the first radiator on the dielectric region such that one end portion faces the ground region and an opposite end portion faces away from the ground region, a first feeding line, a second feeding line, and a connecting structure connected with the first radiator, the first feeding line, the second radiator, and the second feeding line.

An information handling system (IHS) includes an antenna system. The antenna system includes an antenna; a radiating element, the radiating element being capacitively coupled with the antenna; and, a tuner module electrically coupled to the antenna and the radiating element, the tuner module tuning the antenna and the radiating element.

An antenna for multi-broadband and multi-polarization communication, may include a plurality of radiators configured to jointly function as one or more dipoles, a first feed terminal for a first signal of a first polarization, and a second feed terminal for a second signal of a second polarization different from the first polarization. Each radiator may be configured to contribute to resonances at two or more nonoverlapping bands. In an embodiment, the antenna may further include a third feed terminal for a third signal of the first polarization, and a fourth feed terminal for a fourth signal of the second polarization.

A decrease in performance of an antenna is suppressed while maintaining metallic design by a metal vapor deposition layer in a cover with antenna function. A back cover includes cover member, a pictorial pattern layer, and a metasurface. The pictorial pattern layer is arranged in a layering direction with respect to the cover member and includes a metal vapor deposition layer. The metasurface is arranged side by side in the layering direction with the pictorial pattern layer. The metasurface amplifies an antenna signal.

A decrease in performance of an antenna is suppressed while maintaining metallic design by a metal vapor deposition layer in a cover with antenna function. A back cover includes cover member, a pictorial pattern layer, and a metasurface. The pictorial pattern layer is arranged in a layering direction with respect to the cover member and includes a metal vapor deposition layer. The metasurface is arranged side by side in the layering direction with the pictorial pattern layer. The metasurface amplifies an antenna signal.

A multiband antenna is connected to a host conductor when used. The multiband antenna extends long in a first direction. The multiband antenna has a conductor main portion and a ground terminal. The conductor main portion extends in a horizontal plane which is defined by the first direction and a second direction perpendicular to the first direction. The conductor main portion is formed with an opening and a slot. The slot extends long in the first direction. The conductor main portion has a first short edge, a second short edge, a first long edge and a second long edge. The ground terminal is connected to the host conductor when the multiband antenna is used. The ground terminal extends from the second long edge. The ground terminal is positioned closer to the first short edge than to the second short edge in the first direction.

A multiband antenna has a conductor main portion, a first ground terminal and a second ground terminal. The conductor main portion is long in a first direction and extends in a horizontal plane defined by the first direction and a second direction. The conductor main portion has a first long edge and a second long edge at both ends thereof in the second direction, respectively. The conductor main portion is formed with a slot and an opening portion. The slot is long in the first direction. The opening portion is provided in the first long edge and connects the slot with an outside of the conductor main portion. The first ground terminal and the second ground terminal extend from the second long edge. The first ground terminal and the second ground terminal are connected to a host conductor when the multiband antenna is used.