An antenna structure includes a main radiator element, a parasitic radiator element, a feeder and at least one first high-impedance member. The parasitic radiator element is disposed in parallel with the main radiator element. The feeder is configured to electrically or electromagnetically couple the main radiator element. The at least one first high-impedance member directly contacts the parasitic radiator element and is configured to be electrically grounded.

An antenna structure includes a main radiator element, a parasitic radiator element, a feeder and at least one first high-impedance member. The parasitic radiator element is disposed in parallel with the main radiator element. The feeder is configured to electrically or electromagnetically couple the main radiator element. The at least one first high-impedance member directly contacts the parasitic radiator element and is configured to be electrically grounded.

An antenna device. The antenna device includes a first radiating structure that operates at a first frequency band. A second radiating structure operates at a second frequency band. The second radiating structure includes a radiating loop formed along a closed line, wherein the radiating loop is made as a coil extending along the closed line and is electrically invisible at the first frequency band. The second radiating structure operates at the second frequency band that does not affect the performance of the first radiating structure that operate at the first frequency band even when both radiating structures are placed in the vicinity of each other.

An antenna device. The antenna device includes a first radiating structure that operates at a first frequency band. A second radiating structure operates at a second frequency band. The second radiating structure includes a radiating loop formed along a closed line, wherein the radiating loop is made as a coil extending along the closed line and is electrically invisible at the first frequency band. The second radiating structure operates at the second frequency band that does not affect the performance of the first radiating structure that operate at the first frequency band even when both radiating structures are placed in the vicinity of each other.

This application provides a terminal antenna, including a first radiator, a second radiator, a third radiator, a first regulating circuit, and a second regulating circuit. The third radiator includes a low frequency radiator and a medium-high frequency radiator. The first regulating circuit is configured to adjust a frequency of a resonance of a ¾λ, mode of a medium-high frequency produced by the low frequency radiator to be less than a frequency of a resonance of a left-handed antenna pattern. The second regulating circuit is configured to adjust the frequency of the resonance of the left-handed antenna pattern to be greater than the frequency of the resonance of the ¾λ, mode of the medium-high frequency produced by resonating by the low frequency radiator. Values of both the first distance and the second distance are less than 1/16λ, of a frequency band in which the third radiator produces a low frequency.

An electronic apparatus is provided. The electronic device includes a lateral member including a first conductive part disposed between a first non-conductive part formed on a first lateral surface and a second non-conductive part formed on a second lateral surface, a second conductive part disposed between the first non-conductive part and a third non-conductive part formed on a third lateral surface, and a third conductive part disposed on the second lateral surface and facing the first conductive part, a wireless communication circuit electrically connected to a first point of the first conductive part, a first switching circuit for electrically connecting the wireless communication circuit to a second point of the second conductive part, a second switching circuit for connecting the first conductive part to the third conductive part, and at least one processor for controlling the first switching circuit and the second switching circuit.

A housing, which is an example of an antenna protection structure, includes a first dielectric layer, a second dielectric layer laminated on the first dielectric layer, and a third dielectric layer laminated on the second dielectric layer. The relative permittivity of the second dielectric layer is higher than the relative permittivity of the first dielectric layer and the relative permittivity of the second dielectric layer is higher than the relative permittivity of the third dielectric layer. Further, the thickness of the second dielectric layer is smaller than the thickness of the first dielectric layer in a lamination direction and the thickness of the second dielectric layer is smaller than the thickness of the third dielectric layer in the lamination direction.

An antenna module includes a dielectric substrate, in or on which a feed element is formed, a dielectric substrate, in which a ground electrode (GND) is formed, and conductive members. The dielectric substrate is disposed opposite the dielectric substrate. When viewed in plan in the direction normal to the feed element, the conductive members are disposed around the feed element. An air layer is formed between the dielectric substrate and the dielectric substrate. The conductive members are formed in the air layer.

An antenna module includes a dielectric substrate, in or on which a feed element is formed, a dielectric substrate, in which a ground electrode (GND) is formed, and conductive members. The dielectric substrate is disposed opposite the dielectric substrate. When viewed in plan in the direction normal to the feed element, the conductive members are disposed around the feed element. An air layer is formed between the dielectric substrate and the dielectric substrate. The conductive members are formed in the air layer.

An antenna structure according to an embodiment of the present disclosure includes an antenna unit array including a plurality of antenna units, and a parasitic element disposed to be adjacent to the antenna units and to be electrically and physically separated from the antenna units. Each of the antenna units includes a radiator, and a transmission line including a first transmission line and a second transmission line connected to the radiator in different directions. The parasitic element includes a first parasitic element disposed between the first transmission line and the second transmission line included in the same antenna unit, and a second parasitic element disposed between the first transmission line and the second transmission line included in different neighboring antenna units. The second parasitic element includes a branched portion including a first branched portion and a second branched portion bent in different directions.