An antenna assembly and an electronic device are provided. The antenna assembly includes a metal main body, a first metal connecting part, a second metal connecting part, and eight radiating elements disposed on the metal main body. The metal main body includes a first end, a second end opposite to the first end, a third end, and a fourth end opposite to the third end. The first metal connecting part and the second metal connecting part are respectively connected to the third end and the fourth end. The antenna assembly is configured to be operated as an 8×8 5G MIMO antenna system.

An antenna assembly and an electronic device are provided. The antenna assembly includes a metal main body, a first metal connecting part, a second metal connecting part, and eight radiating elements disposed on the metal main body. The metal main body includes a first end, a second end opposite to the first end, a third end, and a fourth end opposite to the third end. The first metal connecting part and the second metal connecting part are respectively connected to the third end and the fourth end. The antenna assembly is configured to be operated as an 8×8 5G MIMO antenna system.

A transmission device for a motor vehicle for transmitting a radio signal is provided. A coil antenna is provided for emitting the radio signal, and an electric driver circuit is designed to generate an electric alternating current with a specified transmission frequency in the coil antenna. The coil antenna is arranged on at least one support element, and a parasitic parallel capacitance acting parallel to an intrinsic inductance of the coil antenna is produced by virtue of the geometry and/or the material of the at least one support element and/or by virtue of the shape of the coil antenna, the parasitic parallel capacitance together with the intrinsic inductance functioning as a parallel resonant circuit with a specified intrinsic resonant frequency with respect to the driver circuit.

An electronic device according to certain embodiments includes a first circuit board, a second circuit board including a communication module, a first antenna module disposed to be separate from the communication module, a flexible cable including a first connector connected to the first circuit board, a second connector connected to the first antenna module, a first extension extending between the first connector and the second connector, and a first receptacle disposed in the first extension, and a first coaxial cable including a third connector connected to the communication module, a fourth connector connected to the first receptacle, and a second extension extending between the third connector and the fourth connector.

A flake-less molecular ink suitable for printing (e.g. screen printing) conductive traces on a substrate has 30-60 wt % of a C.sub.8-C.sub.12 silver carboxylate and 0.1-10 wt % of a polymeric binder, or 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate and 0.25-10 wt % of a polymeric binder, and balance of at least one organic solvent, wherein the binder has ethyl cellulose, and the ethyl cellulose has an average weight molecular weight in a range of 60,000-95,000 g/mol and a bimodal molecular weight distribution.

A printed circuit board can include a substrate layer, a first metal layer disposed over the substrate layer, a core layer disposed over the first metal layer, and a second metal layer disposed over the core layer, where the core layer defines a closed cavity between the first and second metal layers. Optionally, the cavity is filled with air and operates as an antenna.

A printed circuit board can include a substrate layer, a first metal layer disposed over the substrate layer, a core layer disposed over the first metal layer, and a second metal layer disposed over the core layer, where the core layer defines a closed cavity between the first and second metal layers. Optionally, the cavity is filled with air and operates as an antenna.

A terminal device includes a metal frame having at least two slots disposed on a side of the metal frame. At least two antenna feedpoints are disposed on an inner side wall of the metal frame, and different antenna feedpoints in the at least two antenna feedpoints are disposed on side edges of different slots. A signal reflection wall is further provided inside the terminal device, and a gap exists between the signal reflection wall and the at least two slots. The signal reflection wall is formed by a metal wall of a battery chamber of the terminal device, and the battery chamber is a structure that accommodates a battery of the terminal device. The metal frame and the signal reflection wall are both electrically connected to a ground plate of the terminal device.

A terminal device includes a metal frame having at least two slots disposed on a side of the metal frame. At least two antenna feedpoints are disposed on an inner side wall of the metal frame, and different antenna feedpoints in the at least two antenna feedpoints are disposed on side edges of different slots. A signal reflection wall is further provided inside the terminal device, and a gap exists between the signal reflection wall and the at least two slots. The signal reflection wall is formed by a metal wall of a battery chamber of the terminal device, and the battery chamber is a structure that accommodates a battery of the terminal device. The metal frame and the signal reflection wall are both electrically connected to a ground plate of the terminal device.

A radio frequency identification (RFID) antenna is disclosed. The RFID antenna may include: a substrate; a radiator disposed on the substrate, the radiator comprising a first electrical conductor and a second electrical conductor that perpendicularly intersect a straight edge of the radiator, the first electrical conductor and the second electrical conductor being symmetrical to each other with respect to a central point of the radiator; a loop disposed on the substrate; and a stub disposed on the substrate between the loop and the central point of the radiator.