A wireless communication device and an antenna matching circuit are provided. The wireless communication device includes an RF transceiver, a first SPDT switch, a low noise amplifier, a power amplifier, and the antenna matching circuit. The antenna matching circuit includes a second SPDT switch, a first antenna element, a second antenna element, a first transmission path, a second transmission path, and a plurality of SPST switches. The second SPDT switch is connected to the first SPDT switch. When the antenna matching circuit is switched to a first mode, the second SPDT switch is switched to the first transmission path, and the first antenna element is used to generate a first radiation pattern. When the antenna matching circuit is switched to a second mode, the second SPDT switch is switched to the second transmission path, and the second antenna element is used to generate a second radiation pattern.

An antenna includes a reflector, a radiating element extending forwardly of the reflector, and a director positioned forwardly of the radiating element. The director includes a plurality of passive impedance elements that provide frequency-dependent reactances to currents induced therein responsive to electromagnetic radiation generated by the radiating element. The plurality of passive impedance elements include: (i) a primary capacitive element, (ii) a first series LC circuit having a first inductor therein electrically connected to a first portion of the primary capacitive element, and (iii) a second series LC circuit having a second inductor therein electrically connected to a second portion of the primary capacitive element.

An antenna includes a reflector, a radiating element extending forwardly of the reflector, and a director positioned forwardly of the radiating element. The director includes a plurality of passive impedance elements that provide frequency-dependent reactances to currents induced therein responsive to electromagnetic radiation generated by the radiating element. The plurality of passive impedance elements include: (i) a primary capacitive element, (ii) a first series LC circuit having a first inductor therein electrically connected to a first portion of the primary capacitive element, and (iii) a second series LC circuit having a second inductor therein electrically connected to a second portion of the primary capacitive element.

A foldable electronic device includes a first device body, a second device body, an earpiece, an antenna, and a first switch control circuit. The antenna includes a main radiator and a first parasitic radiator. The main radiator is disposed on the first device body, and the first parasitic radiator and the earpiece are disposed on the second device body. When the foldable electronic device is in a folded state, the main radiator is disposed relative to the first parasitic radiator at a first interval and is coupled to the first parasitic radiator through the first interval. The first switch control circuit includes a first switch component and a plurality of different first matching branches disposed in parallel connection. One end of the first switch control circuit is connected to a ground of the second device body, and the other end is connected to the first parasitic radiator.

A foldable electronic device includes a first device body, a second device body, an earpiece, an antenna, and a first switch control circuit. The antenna includes a main radiator and a first parasitic radiator. The main radiator is disposed on the first device body, and the first parasitic radiator and the earpiece are disposed on the second device body. When the foldable electronic device is in a folded state, the main radiator is disposed relative to the first parasitic radiator at a first interval and is coupled to the first parasitic radiator through the first interval. The first switch control circuit includes a first switch component and a plurality of different first matching branches disposed in parallel connection. One end of the first switch control circuit is connected to a ground of the second device body, and the other end is connected to the first parasitic radiator.

An electronic device is provided. The electronic device includes: a first radiator, a second radiator, a first signal source, and a second signal source. The first radiator is coupled to the second radiator, the first signal source is electrically connected to the first radiator, the second signal source is electrically connected to the second radiator, the first signal source is a signal source used when the electronic device works at a positioning frequency band or works at a first WiFi frequency band, and the second signal source is a signal source used when the electronic device works at a second WiFi frequency band.

An electronic device is provided. The electronic device includes: a first radiator, a second radiator, a first signal source, and a second signal source. The first radiator is coupled to the second radiator, the first signal source is electrically connected to the first radiator, the second signal source is electrically connected to the second radiator, the first signal source is a signal source used when the electronic device works at a positioning frequency band or works at a first WiFi frequency band, and the second signal source is a signal source used when the electronic device works at a second WiFi frequency band.

A dual-band antenna structure includes a ground terminal, an impedance-matching terminal, a radiation terminal, and a signal feed-in terminal. The ground terminal includes a body. The impedance-matching terminal is bent and extended from one side of the body, and connected perpendicularly to the body. The radiation terminal is bent and extended from one side of the impedance-matching terminal, and connected perpendicularly to the impedance-matching terminal. The signal feed-in terminal is bent and extended from one side of the radiation terminal, and connected perpendicularly to the radiation terminal, and connected to the impedance-matching terminal on a same side, and not connected to the ground terminal. A length of the impedance-matching terminal is shortened to increase an area of the radiation terminal and shorten a distance between the ground terminal and the radiation terminal, so the inverted F-shaped antenna structure is arranged inside electronic apparatuses with limited height and space.

A dual-band antenna structure includes a ground terminal, an impedance-matching terminal, a radiation terminal, and a signal feed-in terminal. The ground terminal includes a body. The impedance-matching terminal is bent and extended from one side of the body, and connected perpendicularly to the body. The radiation terminal is bent and extended from one side of the impedance-matching terminal, and connected perpendicularly to the impedance-matching terminal. The signal feed-in terminal is bent and extended from one side of the radiation terminal, and connected perpendicularly to the radiation terminal, and connected to the impedance-matching terminal on a same side, and not connected to the ground terminal. A length of the impedance-matching terminal is shortened to increase an area of the radiation terminal and shorten a distance between the ground terminal and the radiation terminal, so the inverted F-shaped antenna structure is arranged inside electronic apparatuses with limited height and space.

A reconfigurable antenna system is described which combines active and passive components used to impedance match, alter the frequency response, and change the radiation pattern of an antenna. Re-use of components such as switches and tunable capacitors make the circuit topologies more space and cost effective, while reducing complexity of the control signaling required. Antenna structures with single and multiple feed and/or ground connections are described and active circuit topologies are shown for these configurations. A processor and algorithm can reside with the antenna circuitry, or the algorithm to control antenna optimization can be implemented in a processor in the host device.