An antenna apparatus and an electronic apparatus are provided. The electronic apparatus includes the antenna apparatus. The antenna apparatus includes a radiator, a first and a second impedance control circuit. The radiator receives and transmits a radio frequency (RF) signal. The first impedance control circuit is electrically connected to the radiator and transmits the RF signal. The second impedance control circuit includes an impedance matching circuit and an inductor. The first end of the impedance matching circuit is electrically connected to the radiator. The impedance matching circuit adjusts the impedance matching of the radiator and transmits a sensing signal. The inductor is electrically connected to the second end of the impedance matching circuit. The inductor transmits a sensing signal, and blocks the RF signal. Accordingly, the structures of the antenna and the circuit can be simplified, and the influence between the RF signal and the sensing signal can be reduced.

An antenna apparatus and an electronic apparatus are provided. The electronic apparatus includes the antenna apparatus. The antenna apparatus includes a radiator, a first and a second impedance control circuit. The radiator receives and transmits a radio frequency (RF) signal. The first impedance control circuit is electrically connected to the radiator and transmits the RF signal. The second impedance control circuit includes an impedance matching circuit and an inductor. The first end of the impedance matching circuit is electrically connected to the radiator. The impedance matching circuit adjusts the impedance matching of the radiator and transmits a sensing signal. The inductor is electrically connected to the second end of the impedance matching circuit. The inductor transmits a sensing signal, and blocks the RF signal. Accordingly, the structures of the antenna and the circuit can be simplified, and the influence between the RF signal and the sensing signal can be reduced.

A wireless handheld or portable device includes an antenna system operable in a first frequency region and a higher, second frequency region. The antenna system comprises an antenna structure, a matching and tuning system, and an external input/output (I/O) port. The antenna structure comprises at least one radiating element including a connection point, a ground plane layer including at least one connection point, and at least one internal I/O port. At least one radiating element of the antenna structure protrudes beyond the ground plane layer. The antenna structure features at any of its internal I/O ports when disconnected from the matching and tuning system an input return loss curve having a minimum at a frequency outside the first frequency region of the antenna system. The matching and tuning system modifies the impedance of the antenna structure and provides impedance matching to the antenna system in the first and second regions.

A wireless handheld or portable device includes an antenna system operable in a first frequency region and a higher, second frequency region. The antenna system comprises an antenna structure, a matching and tuning system, and an external input/output (I/O) port. The antenna structure comprises at least one radiating element including a connection point, a ground plane layer including at least one connection point, and at least one internal I/O port. At least one radiating element of the antenna structure protrudes beyond the ground plane layer. The antenna structure features at any of its internal I/O ports when disconnected from the matching and tuning system an input return loss curve having a minimum at a frequency outside the first frequency region of the antenna system. The matching and tuning system modifies the impedance of the antenna structure and provides impedance matching to the antenna system in the first and second regions.

An antenna device includes a ground plane that includes an edge and a surface, a protruding metallic member that includes a first connecting part and a second connecting part coupled to the ground plane, protrudes from the edge, and constructs a first loop including the edge, and a T-shaped antenna element that extends from a feeding point to a first end and a second end along the edge, the feeding point being disposed in the vicinity of the surface between the first connecting part and the second connecting part of the first loop, wherein a length of the first loop corresponds to an electric length of one wavelength in a first frequency, and corresponds to an electric length of two wavelengths in a second frequency that is a second order harmonic of the first frequency.

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.

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.

This application provides an antenna structure and a communications terminal. The antenna structure includes an antenna radiator, a signal source, a first capacitor, and a first tuning circuit. A first terminal of the antenna radiator is grounded. A first terminal of the first capacitor and a first terminal of the first tuning circuit are electrically connected to a connection point of the antenna radiator. A second terminal of the first capacitor is electrically connected to the signal source. A second terminal of the first tuning circuit is grounded. Antenna impedance of the first terminal of the first capacitor at target frequencies is in the first quadrant of a Smith chart, and the target frequencies are at least some frequencies in frequency bands covered by the antenna radiator.

According to certain embodiments, a vehicle comprises a frame comprising at least one metal panel forming an exterior surface of the vehicle; an antenna disposed below the at least one metal panel in an interior of the vehicle; a printed circuit board (PCB) module electrically connected to the antenna; and at least one ground extender electrically connecting a ground of the PCB module to the metal panel, wherein the ground extender is configured to receive current from the PCB module, and provide the current from the PCB module to the metal panel.

According to certain embodiments, a vehicle comprises a frame comprising at least one metal panel forming an exterior surface of the vehicle; an antenna disposed below the at least one metal panel in an interior of the vehicle; a printed circuit board (PCB) module electrically connected to the antenna; and at least one ground extender electrically connecting a ground of the PCB module to the metal panel, wherein the ground extender is configured to receive current from the PCB module, and provide the current from the PCB module to the metal panel.