An antenna and a detecting device are provided. The antenna includes a ground plane, a pole and a microstrip line. The detecting device includes an oscilloscope and the antenna that is connected with the oscilloscope.

An antenna and a detecting device are provided. The antenna includes a ground plane, a pole and a microstrip line. The detecting device includes an oscilloscope and the antenna that is connected with the oscilloscope.

A directional antenna includes an array of unitary antenna elements. The array includes an active antenna element, called “radiator element”, which is configured to be electrically connected to a radiofrequency receiver or source, and at least one passive antenna element supplied with power by mutual induction, called “parasitic element.” The radiator element is a parasitic resonator antenna having a monopole, a ground plane and a parasitic cell that is placed in the near field of the monopole. In particular embodiments, the ground plane is used to accept tracks of an electronic circuit of a transmitter or receiver device. The antenna performs particularly well in terms of directivity and radiating efficiency, while being highly compact.

A directional antenna includes an array of unitary antenna elements. The array includes an active antenna element, called “radiator element”, which is configured to be electrically connected to a radiofrequency receiver or source, and at least one passive antenna element supplied with power by mutual induction, called “parasitic element.” The radiator element is a parasitic resonator antenna having a monopole, a ground plane and a parasitic cell that is placed in the near field of the monopole. In particular embodiments, the ground plane is used to accept tracks of an electronic circuit of a transmitter or receiver device. The antenna performs particularly well in terms of directivity and radiating efficiency, while being highly compact.

An antenna device includes a substrate, a first antenna element extending in a direction perpendicular to a first surface of the substrate and functioning as a monopole antenna, a second antenna element provided adjacent to the first antenna element, extending in the direction perpendicular to the first surface of the substrate, and functioning as a monopole antenna, a ground layer provided in or on the substrate, a connection wire provided in or on the substrate and connecting the first antenna element and the second antenna element to each other, a power feeding line provided in or on the substrate and connected to the connection wire, and a first reflector provided in a direction in which the first antenna element and the second antenna element are adjacent to each other and facing the first antenna element and the second antenna element.

An antenna device includes a substrate, a first antenna element extending in a direction perpendicular to a first surface of the substrate and functioning as a monopole antenna, a second antenna element provided adjacent to the first antenna element, extending in the direction perpendicular to the first surface of the substrate, and functioning as a monopole antenna, a ground layer provided in or on the substrate, a connection wire provided in or on the substrate and connecting the first antenna element and the second antenna element to each other, a power feeding line provided in or on the substrate and connected to the connection wire, and a first reflector provided in a direction in which the first antenna element and the second antenna element are adjacent to each other and facing the first antenna element and the second antenna element.

An antenna includes a first element, a second element, and a reactance-adjustable component. The first element receives an excitation current through an electrical connection to an antenna feeder, and the second element generates an induced current through electromagnetic induction of the first element. The reactance-adjustable component is disposed at an end of the first element close to a reference plane, and/or the reactance-adjustable component is disposed at an end of the second element close to a reference plane. The reference plane uses a connection point between the first element and the antenna feeder as an origin point and is perpendicular to an axial direction of the first element. The reactance-adjustable component has an adjustable reactance value and is configured to adjust a phase difference between an excitation current and an induced current, where the phase difference has an association relationship with a target angle of radiation of the antenna.

An antenna includes a first element, a second element, and a reactance-adjustable component. The first element receives an excitation current through an electrical connection to an antenna feeder, and the second element generates an induced current through electromagnetic induction of the first element. The reactance-adjustable component is disposed at an end of the first element close to a reference plane, and/or the reactance-adjustable component is disposed at an end of the second element close to a reference plane. The reference plane uses a connection point between the first element and the antenna feeder as an origin point and is perpendicular to an axial direction of the first element. The reactance-adjustable component has an adjustable reactance value and is configured to adjust a phase difference between an excitation current and an induced current, where the phase difference has an association relationship with a target angle of radiation of the antenna.

An electronic device having an antenna according to an embodiment is provided. The electronic device may include a radiator configured by stacking metal patterns on different layers of a multi-layer substrate, and a ground layer arranged on the different layers of the multi-layer substrate and operating as ground for the radiator. At least some of the metal patterns may be vertically interconnected, and any one of the metal patterns may be connected to a feeding pattern.

A UHF-RFID antenna having a central segmented loop surrounded by passive dipole structures provides shaping of the electric and magnetic fields to reduce the number of false positive reads by a UHF-RFID reader at a point of sale.