The present description concerns a polarization cell (109) comprising a rectangular conductive plane having an off-centered opening, a terminal of application of an input signal located inside of the opening, a first switching element coupling the terminal to a first region of the conductive plane located in the vicinity of a first corner of the conductive plane and a second switching element coupling the terminal to a second region of the conductive plane located in the vicinity of a second corner of the conductive plane, the first and second corners being coupled by a same side of the conductive plane.

Methods and systems for implementing and operating antennas, particularly multiple-input and multiple-output (MIMO) antennas. An example antenna may include a planar dielectric substrate, a primary conductive area on a first surface of the planar dielectric substrate, a first secondary conductive area on the first surface, and a second secondary conductive area, and a ground plane on a second surface, on other side of the planar dielectric substrate. The primary conductive area may have a shape defining a first region of the first surface bounded by at least a portion of the primary conductive area, and a second region that includes a remaining portion of the first surface; a first secondary conductive area on the first surface, wherein the first secondary conductive area lies in the first region of the first surface. The second secondary conductive area may be provided on the first surface, and may lie in the second region.

Provided are a circularly polarized antenna and a wearable device. The circularly polarized antenna is applicable to a wearable device, the antenna including: an annular gap structure including an annular antenna radiator, the radiator having an effective perimeter equal to a wavelength corresponding to a central operating frequency of the circularly polarized antenna; a feeding terminal connected across the gap structure, electrically connected to the radiator at one end, and connected to a feeding module of a mainboard of the wearable device at the other end; and at least one first grounding terminal connected across the gap structure, electrically connected to the radiator at one end, and electrically connected to a grounding module of the mainboard via an inductor at the other end.

The present disclosure relates to a near-field communication (NFC) ornament, including an ornament main body, an NFC chip, an NFC antenna, an NFC antenna housing and a decorating part; a surface of the ornament main body is provided with an insert hole and a supporting face located at a periphery of the insert opening; a groove is formed in the NFC antenna housing; an apertural face of the NFC antenna housing is connected with a supporting face of the ornament main body; a magnetic isolation component is arranged between the apertural face of the NFC antenna housing and the supporting face.

A parasitically-coupled dual-band patch antenna is described. The antenna includes an inner conductor having one or more feed holes. The antenna also includes an outer conductor surrounding the inner conductor in a radial direction. The antenna further includes one or more feeds each having a vertical portion that passes through the feed holes and a horizontal portion that extends in an outward direction from the feed holes toward the outer conductor. The feeds are conductively connected to the outer conductor. The horizontal portion of each of the feeds is separated from and is conductively disconnected from a top surface of the inner conductor.

Arranged on a surface of a substrate are a patch conductor that radiates an electromagnetic field having been fed, a feed line that feeds the patch conductor with the electromagnetic field having been input, two slits parallel to the feed line on both sides of a connection part of the feed line toward an inner side of the patch conductor, and a ring conductor at a space from the patch conductor with an interposition of a gap to surround an outer periphery of the patch conductor. Accordingly, an electric capacitance can be formed between the patch conductor and the ring conductor, and when achieving impedance matching with the feed line, adjustment can be performed using the size of the ring conductor and the gap.

The invention relates to an antenna device configured to superimpose a plurality of electromagnetic modes in the near field, with a multilayer structure comprising, in a vertical stacking direction: a first power supply layer comprising a first dielectric on an application-specific integrated circuit and on a lower part of a DC power supply circuit, a second power supply layer comprising an upper part of a DC power supply circuit, a third layer comprising a second dielectric on a metal plane, a fourth layer comprising at least one planar radiating element, the metal plane acting as a grounding plane, a fifth layer comprising a radome, the antenna device comprising at least one feed line extending from the first to the fourth layer.

Disclosed herein are antenna boards, antenna modules, and communication devices. For example, in some embodiments, an antenna board may include a plurality of antenna patches coupled to a dielectric material and a plurality of pedestals extending from a face of the dielectric material and at least partially embedded in the dielectric material.

A portable electronic device and a plate antenna module thereof are provided. The plate antenna module includes an antenna carrying structure, an inner surrounding radiation structure, a first inner feeding structure, an outer surrounding radiation structure, and a first outer feeding structure. The first inner feeding structure is surrounded by the inner surrounding radiation structure. The inner surrounding radiation structure is surrounded by the outer surrounding radiation structure and separate from the outer surrounding radiation structure. The first outer feeding structure corresponds to the first inner feeding structure. The inner surrounding radiation structure and the first inner feeding structure can cooperate with each other to form a first antenna assembly for generating a first antenna operating frequency, and the outer surrounding radiation structure and the first outer feeding structure can cooperate with each other to form a second antenna assembly for generating a second antenna operating frequency.

The invention relates to a method and a system for position determination of at least one object, in particular inside a building. In a method for position determination of at least one object, at least four transmitters transmit circularly polarized signals and a receiver to be localized receives the circularly polarized signals. At least two and in particular all transmitters transmit periodic signals of different frequencies, these frequencies being closely adjacent.