A jewel includes a main body and at least one wireless communication device accommodated within a cavity formed in the main body. The at least one communication device is arranged slanting with respect to a bottom wall of the cavity, partly accommodated in an undercut region of the cavity and spaced from the bottom wall and from walls at opposed ends of the cavity, whereby propagation of the signal in the space between the at least one communication device and the walls of the cavity is allowed.

Provided is a wearable device including an annular metal shell and a circuit board. The circuit board is disposed in the annular metal shell, and includes a clearance zone and a tracing zone. The clearance zone includes an antenna feeding portion, and the tracing zone includes electronic elements, a metal circuit, and an antenna grounding portion. The antenna feeding portion is coupled to the electronic elements and the metal circuit, and the antenna feeding portion and the antenna grounding portion are coupled to the annular metal shell, such that the antenna feeding portion, the electronic elements, and the metal circuit jointly resonate at a frequency band.

Disclosed herein includes a wireless device including a first antenna configured to perform wireless communication, a second antenna configured to perform wireless communication, and a parasitic antenna. The first antenna may have a feed connected to a first impedance tuner that is connected to a first ground planes. The second antenna may have a feed connected to a second impedance tuner. The parasitic antenna may be disposed between the first and second antennas, with a feed connected to a third impedance tuner that is connected to a second ground plane. The first, second and third impedance tuners may be adjusted to configure the first, second and parasitic antennas to achieve a same resonant frequency.

A wireless communication device includes an antenna resonance circuit and a wireless IC element. The antenna resonance circuit includes a loop-shaped antenna that performs wireless communication by generating a magnetic field and series inductors connected in series to the loop-shaped antenna. The antenna resonance circuit has a resonant frequency corresponding to a carrier frequency. The wireless IC element is connected to the antenna resonance circuit and processes transmission and reception signals. An inductance value of the series inductors is larger than an inductance value of the loop-shaped antenna, and the series inductors are covered with a magnetic material.

A wearable device includes: a metal middle cover, a metal bottom cover, a printed circuit board PCB, and a gap. The metal middle cover encircles the wearable device for a whole circle and serves as an exterior of the wearable device. The metal bottom cover is located under the metal middle cover and serves as a rear cover of the wearable device. The gap with a preset width exists between the metal middle cover and the metal bottom cover, and serves as a slot antenna of the wearable device. The PCB is in an inner side of the metal middle cover, and is located above the metal bottom cover. The PCB is electrically connected to the metal middle cover by using a feed point, and feeds power to the metal middle cover.

Disclosed is a helmet provided with a radar reflector. The helmet includes a helmet body formed in a shape corresponding to a shape of a user head, and the radar reflector mounted on an outer surface of the helmet body to reflect a radar signal transmitted from radar equipment. The radar reflector includes a plurality of reflection units each concaved in a trigonal pyramid shape having one opened surface, each of the plurality of reflection units reflecting the radar signal. Thus, by applying the radar reflector to the helmet of a user aboard an object to be detected by using a radar signal, the radar signal is effectively reflected in bad weather or at night, thereby improving the recognition rate of radar equipment.

A radar assembly includes a hollow drum and an antenna holding structure located inside the hollow drum so that the hollow drum can rotate around the antenna holding structure. An antenna is connected to the antenna holding structure and located inside the hollow drum so that the hollow drum can rotate around the antenna. The antenna holding structure is connected to a base frame and to which the hollow drum is connected via at least one axle so that the hollow drum can rotate around the antenna holding structure while the antenna holding structure and antenna remain stationary. A handle is connected to the base frame so that a user can direct the antenna towards a surface of interest which is to be radiated and can then roll the hollow drum over the surface while maintaining the antenna in a user selected orientation.

An antenna assembly for use with a medical implant includes an antenna that defines at least one turn and an electromagnetic shield.

A wearable electronic device is described. The wearable electronic device includes two communications antennae. A first antenna of the two is a current-carrying antenna electrically and physically connected to a printed circuit board of the wearable electronic device and housed in a first portion of a housing that is configured for mounting on a person's skin. A second antenna of the two is a scatterer antenna physically connected to an interior surface of a second portion of the housing and configured to overlap a portion of the current-carrying antenna. The second portion of the housing faces away from the person's skin when the wearable device is mounted on the person's skin. Current from the current-carrying antenna is induced in the scatterer antenna to enable communications between the wearable electronic device and one or more other electronic devices.

In an embodiment a wireless earphone includes an earbud portion having a speaker module, a stalk portion having a battery, wherein the earbud portion is connected to one end of the stalk portion, a circuit board and a first antenna being a slot antenna, wherein the circuit board extends from the earbud portion to an end of the stalk portion away from the earbud portion, wherein the circuit board is connected to the speaker module and the battery, wherein the circuit board comprises a reference ground, the reference ground extending from one end of the circuit board to another end of the circuit board, and wherein a slot is disposed on the reference ground forming a radiator of the slot antenna, the slot being located in the stalk portion and extending along a length direction of the stalk portion.