A scanning antenna system includes a feed line having first and second ends, and a scanning antenna element disposed with respect to the feed line so that, in the transmit mode, a signal input to one of the first and second ends of the feed line is evanescently coupled to the antenna element, whereby the antenna element radiates the signal as a shaped beam through an angular scanning field having a negative angular scanning space and a positive angular scanning space on either side of the stop band near 0. A switching network, operatively coupled to the feed line, switches the signal input between the first and second ends of the feed line in a controlled sequence, whereby the shaped beam radiated by the antenna element is scanned in the negative scanning space, the stop band, and the positive scanning space. The antenna system performs reciprocally in the receive mode.

An antenna unit includes a dielectric substrate; a dielectric cover on the dielectric substrate; and an antenna array. The antenna array includes antenna elements arranged in the dielectric substrate and configured to form traveling waves propagating in the dielectric substrate and the dielectric cover. The antenna unit also includes at least one spatial matching element arranged in space formed inside the dielectric substrate, spatially matched with the dielectric cover, and coupled with the at least one antenna element. The spatial matching element is configured to be spatially matched with the antenna array with the dielectric cover and to reduce reflections of traveling waves propagating from the antenna array to the dielectric cover. The antenna device may be diversified.

An antenna unit includes a dielectric substrate; a dielectric cover on the dielectric substrate; and an antenna array. The antenna array includes antenna elements arranged in the dielectric substrate and configured to form traveling waves propagating in the dielectric substrate and the dielectric cover. The antenna unit also includes at least one spatial matching element arranged in space formed inside the dielectric substrate, spatially matched with the dielectric cover, and coupled with the at least one antenna element. The spatial matching element is configured to be spatially matched with the antenna array with the dielectric cover and to reduce reflections of traveling waves propagating from the antenna array to the dielectric cover. The antenna device may be diversified.

Embodiments of the present invention relate to the field of antenna technologies, and provide a mobile terminal, to generate different resonance frequencies. The slot antenna includes a system circuit board, a radiator, and a first adjustable unit. The radiator is opposite to the electric conductor to form a slot. A feeding end is disposed on the system circuit board, the feeding end is electrically connected to the radiator, one end of the first adjustable unit is connected to the system circuit board, the other end of the first adjustable unit is connected to the radiator, and the first adjustable unit is configured to adjust a resonance frequency of the slot antenna.

Embodiments of the present invention relate to the field of antenna technologies, and provide a mobile terminal, to generate different resonance frequencies. The slot antenna includes a system circuit board, a radiator, and a first adjustable unit. The radiator is opposite to the electric conductor to form a slot. A feeding end is disposed on the system circuit board, the feeding end is electrically connected to the radiator, one end of the first adjustable unit is connected to the system circuit board, the other end of the first adjustable unit is connected to the radiator, and the first adjustable unit is configured to adjust a resonance frequency of the slot antenna.

Embodiments of the present disclosure provide techniques and configurations for a cable assembly for single wire communications (SWC). In one instance, the cable assembly may comprise a wire having a wire end to couple with a signal launcher of an electronic device, and a first cover portion to house a first portion of the wire that extends from the wire end. The first cover portion may comprise a shape to conform to a shape of the signal launcher, and may be fabricated of a material with a dielectric constant above a threshold. The assembly may further comprise a second cover portion coupled with the first cover portion to house a second portion of the wire that extends from the first wire portion and protrudes from the first cover portion. The second cover portion may be fabricated of a ferrite material. Other embodiments may be described and/or claimed.

Embodiments of the present disclosure provide techniques and configurations for a cable assembly for single wire communications (SWC). In one instance, the cable assembly may comprise a wire having a wire end to couple with a signal launcher of an electronic device, and a first cover portion to house a first portion of the wire that extends from the wire end. The first cover portion may comprise a shape to conform to a shape of the signal launcher, and may be fabricated of a material with a dielectric constant above a threshold. The assembly may further comprise a second cover portion coupled with the first cover portion to house a second portion of the wire that extends from the first wire portion and protrudes from the first cover portion. The second cover portion may be fabricated of a ferrite material. Other embodiments may be described and/or claimed.

A radio frequency (RF) communications system may include a local RF communications device and an RF antenna coupled to the local RF communications device. The RF antenna may include a cavity backing housing, a conical RF launch structure having an apex positioned within the cavity backing housing, and an elongate electrical conductor having a proximal end extending through the apex of the conical RF launch structure and a distal end spaced apart from the conical RF launch structure to define an elongate RF coverage pattern. The system may further include at least one remote RF communications device within the elongate RF coverage pattern to wirelessly communicate with the local RF communications device.

A radio frequency (RF) communications system may include a local RF communications device and an RF antenna coupled to the local RF communications device. The RF antenna may include a cavity backing housing, a conical RF launch structure having an apex positioned within the cavity backing housing, and an elongate electrical conductor having a proximal end extending through the apex of the conical RF launch structure and a distal end spaced apart from the conical RF launch structure to define an elongate RF coverage pattern. The system may further include at least one remote RF communications device within the elongate RF coverage pattern to wirelessly communicate with the local RF communications device.

Embodiments of the present invention relate to the field of antenna technologies, and provide a slot antenna and a mobile terminal, to generate different resonance frequencies, so as to cover required bands. The slot antenna includes a system circuit board, a grounding conductor, a radiator, and a first adjustable unit. The system circuit board is connected to the grounding conductor to form an electric conductor, and the radiator is opposite to the electric conductor to form a slot. A feeding end is disposed on the system circuit board, the feeding end is electrically connected to the radiator, one end of the first adjustable unit is connected to the system circuit board, the other end of the first adjustable unit is connected to the radiator, and the first adjustable unit is configured to adjust a resonance frequency of the slot antenna.