An antenna-includes a first radiator and a first capacitor structure. A first end of the first radiator is electrically connected to a signal feed end of a printed circuit board by means of the first capacitor structure, and a second end of the first radiator is electrically connected to a ground end of the printed circuit board. The first radiator, the first capacitor structure, the signal feed end, and the ground end form a first antenna configured to produce a first resonance frequency. An electrical length of the first radiator is greater than one eighth of a wavelength corresponding to the first resonance frequency, and the electrical length of the first radiator is less than a quarter of the wavelength corresponding to the first resonance frequency.

An antenna-includes a first radiator and a first capacitor structure. A first end of the first radiator is electrically connected to a signal feed end of a printed circuit board by means of the first capacitor structure, and a second end of the first radiator is electrically connected to a ground end of the printed circuit board. The first radiator, the first capacitor structure, the signal feed end, and the ground end form a first antenna configured to produce a first resonance frequency. An electrical length of the first radiator is greater than one eighth of a wavelength corresponding to the first resonance frequency, and the electrical length of the first radiator is less than a quarter of the wavelength corresponding to the first resonance frequency.

A wireless communications device may include an RF transmitter having an operating frequency range, an RF antenna having an electrical length less than or equal to one-tenth of a wavelength of a lowest operating frequency of the operating frequency range, and an RF matching network coupled between the RF transmitter and the RF antenna. The RF matching network may include a first RF matching transformer, a first inductor coupled between a first reference terminal and a reference voltage, a first resistor coupled across a first output terminal and the first reference terminal and configured to dissipate heat that would otherwise be dissipated by the first RF matching transformer to reduce an operating temperature of the first RF matching transformer, and a heat sink coupled to the first resistor.

A wireless communications device may include an RF transmitter having an operating frequency range, an RF antenna having an electrical length less than or equal to one-tenth of a wavelength of a lowest operating frequency of the operating frequency range, and an RF matching network coupled between the RF transmitter and the RF antenna. The RF matching network may include a first RF matching transformer, a first inductor coupled between a first reference terminal and a reference voltage, a first resistor coupled across a first output terminal and the first reference terminal and configured to dissipate heat that would otherwise be dissipated by the first RF matching transformer to reduce an operating temperature of the first RF matching transformer, and a heat sink coupled to the first resistor.

An electronic device includes a housing that includes a first plate, a second plate, and a side member, the side member including a first conductive portion, a second conductive portion, a third conductive portion, a first insulating portion, and a second insulating portion, a wireless communication circuitry that is electrically connected to a first point of the first conductive portion, wherein the first point is adjacent to the second insulating portion, a ground member that is included in the housing, a first switching circuitry that includes a first terminal electrically connected to a second point of the first conductive portion, which is more distant from the second insulating portion than the first point, and at least one second terminal electrically connected to the ground member through at least one first passive element, and a conductive pattern that is electrically connected to the second point and forms a closed loop.

A wireless communication device includes a first antenna, a second antenna, a first switching circuit, and a first tunable matching circuit. The first switching circuit is electrically connected to the first antenna, the second antenna, and the first tunable matching circuit. In a first operation mode, the first antenna of the wireless communication device performs signal transmission or reception, an impedance value corresponding to the first tunable matching circuit is adjusted to a first impedance value, and the second antenna is conducted to the first tunable matching circuit through the first switching circuit. In a second operation mode, the second antenna of the wireless communication device performs signal transmission or reception, the impedance value corresponding to the first tunable matching circuit is adjusted to a second impedance value, and the first antenna is conducted to the first tunable matching circuit through the first switching circuit.

A wireless communication device includes a first antenna, a second antenna, a first switching circuit, and a first tunable matching circuit. The first switching circuit is electrically connected to the first antenna, the second antenna, and the first tunable matching circuit. In a first operation mode, the first antenna of the wireless communication device performs signal transmission or reception, an impedance value corresponding to the first tunable matching circuit is adjusted to a first impedance value, and the second antenna is conducted to the first tunable matching circuit through the first switching circuit. In a second operation mode, the second antenna of the wireless communication device performs signal transmission or reception, the impedance value corresponding to the first tunable matching circuit is adjusted to a second impedance value, and the first antenna is conducted to the first tunable matching circuit through the first switching circuit.

A hybrid antenna used for an electronic device is disclosed. A hybrid antenna comprises: a substrate comprising a first surface and a second surface and having an insulator; a first conductive member disposed on the first surface of the substrate and having a hole formed therein; a second conductive member disposed on a first area of the second surface of the substrate; and a third conductive member disposed on a second area of the second surface of the substrate and connected to a ground of an electronic device, wherein a first portion of the first conductive member operates as a first antenna for receiving a broadband signal and supplying power to the electronic device, and a second portion operates as a second antenna for receiving wireless power and supplying power to the electronic device, wherein a first power feeding unit is formed between the first antenna and second antenna.

A hybrid antenna used for an electronic device is disclosed. A hybrid antenna comprises: a substrate comprising a first surface and a second surface and having an insulator; a first conductive member disposed on the first surface of the substrate and having a hole formed therein; a second conductive member disposed on a first area of the second surface of the substrate; and a third conductive member disposed on a second area of the second surface of the substrate and connected to a ground of an electronic device, wherein a first portion of the first conductive member operates as a first antenna for receiving a broadband signal and supplying power to the electronic device, and a second portion operates as a second antenna for receiving wireless power and supplying power to the electronic device, wherein a first power feeding unit is formed between the first antenna and second antenna.

An electronic device includes an antenna including a ground part, a feeding part, and a radiator and a first switch interposed between the feeding part and the radiator. A signal supplied through the feeding part is transmitted through a first path, a second path, or a third path that connects the feeding part to the radiator. The first switch is configured to change a connection state of the second path and the third path, and the third path includes a variable capacitor.