An earphone module includes an antenna structure. The antenna structure includes a first radiator, a second radiator, a conductive member, and a first insulating member. The first radiator includes a feeding end. The second radiator includes a ground end, and a first slot is formed between the first radiator and the second radiator. The conductive member is connected to the first radiator and the second radiator. The first insulating member is disposed in the first slot. The first radiator, the second radiator, the conductive member, and the first insulating member collectively serve as at least a part of a shell of the earphone module.

An antenna unit for transmitting and receiving high frequency signals includes a substrate that is optionally encapsulable with a potting compound having a defined dielectric value. Arranged on the substrate are two planar antennas each tuned for the high frequency signal. The planar antennas are designed such that the values of the real parts of the impedances of the planar antennas differ by the square root of the dielectric value of the potting compound. By providing two antennas, wherein one thereof is impedance-matched to a possible potting compound encapsulation, the antenna unit is able to function independently of a possible potting compound encapsulation. Electronic modules which comprise the antenna unit for wireless communication can be implemented according to the platform principle in devices that require a potting compound encapsulation and also in devices that are not encapsulated.

An antenna unit for transmitting and receiving high frequency signals includes a substrate that is optionally encapsulable with a potting compound having a defined dielectric value. Arranged on the substrate are two planar antennas each tuned for the high frequency signal. The planar antennas are designed such that the values of the real parts of the impedances of the planar antennas differ by the square root of the dielectric value of the potting compound. By providing two antennas, wherein one thereof is impedance-matched to a possible potting compound encapsulation, the antenna unit is able to function independently of a possible potting compound encapsulation. Electronic modules which comprise the antenna unit for wireless communication can be implemented according to the platform principle in devices that require a potting compound encapsulation and also in devices that are not encapsulated.

An antenna system comprises a substrate, an antenna positioned on the substrate, and a circuit component positioned on the substrate. The antenna is positioned on a first surface of the substrate and operable to emit a radiation pattern. The circuit component is positioned on the substrate in a null region of the radiation pattern. The thickness of portions of the substrate are modified to achieve a desired performance characteristic of the antenna.

A radiation element for an antenna includes a first pair of dipoles. The first pair of dipoles includes a first dipole and a second dipole, where the first dipole has a first radiation arm and a second radiation arm, and the second dipole has a third radiation arm and a fourth radiation arm. A first connection trace between the first radiation arm of the first dipole and the third radiation arm of the second dipole and a second connection trace between the second radiation arm of the first dipole and the fourth radiation arm of the second dipole are parallel to each other. The radiation arms of the first pair of dipoles are planar structures.

A radiation element for an antenna includes a first pair of dipoles. The first pair of dipoles includes a first dipole and a second dipole, where the first dipole has a first radiation arm and a second radiation arm, and the second dipole has a third radiation arm and a fourth radiation arm. A first connection trace between the first radiation arm of the first dipole and the third radiation arm of the second dipole and a second connection trace between the second radiation arm of the first dipole and the fourth radiation arm of the second dipole are parallel to each other. The radiation arms of the first pair of dipoles are planar structures.

A reduction in size and cost of a filter capable of changing a pass band is realized. A filter includes a first distributed constant line, a first impedance element, a second impedance element, and a first switch. The first impedance element and the first switch are connected in series between the first distributed constant line and a ground point. The second impedance element is connected between the first distributed constant line and the ground point.

A reduction in size and cost of a filter capable of changing a pass band is realized. A filter includes a first distributed constant line, a first impedance element, a second impedance element, and a first switch. The first impedance element and the first switch are connected in series between the first distributed constant line and a ground point. The second impedance element is connected between the first distributed constant line and the ground point.

A wireless device includes at least one slim radiating system having a slim radiating structure and a radio-frequency system. The slim radiating structure includes one or more booster bars. The booster bar has slim width and height factors that facilitate its integration within the wireless device and the excitation of a resonant mode in the ground plane layer, and has a location factor that enables it to achieve the most favorable radio-frequency performance for the available space to allocate the booster bar. The at least one slim radiating system may be configured to transmit and receive electromagnetic wave signals in one or more frequency regions of the electromagnetic spectrum.

A wireless device includes at least one slim radiating system having a slim radiating structure and a radio-frequency system. The slim radiating structure includes one or more booster bars. The booster bar has slim width and height factors that facilitate its integration within the wireless device and the excitation of a resonant mode in the ground plane layer, and has a location factor that enables it to achieve the most favorable radio-frequency performance for the available space to allocate the booster bar. The at least one slim radiating system may be configured to transmit and receive electromagnetic wave signals in one or more frequency regions of the electromagnetic spectrum.