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.

Provided are an antenna device and a wireless communication device that are small in size and capable of transmitting and receiving vertically polarized waves without requiring an additional noise countermeasure. The antenna device (100) includes: a feeding antenna element (101) having an element section (101A) parallel to a ground surface, one end of which is electrically connected to a supply source (203) supplying a wireless communication signal; and a parasitic antenna element (102) having a vertical element section disposed perpendicular to the ground surface, and being disposed near another end of the feeding antenna element (101). The wireless communication device (200) includes: a substrate (201) on which a ground layer (202) having a reference potential and a supply source (203) supplying a wireless communication signal are formed; and the antenna device (100).

Provided are an antenna device and a wireless communication device that are small in size and capable of transmitting and receiving vertically polarized waves without requiring an additional noise countermeasure. The antenna device (100) includes: a feeding antenna element (101) having an element section (101A) parallel to a ground surface, one end of which is electrically connected to a supply source (203) supplying a wireless communication signal; and a parasitic antenna element (102) having a vertical element section disposed perpendicular to the ground surface, and being disposed near another end of the feeding antenna element (101). The wireless communication device (200) includes: a substrate (201) on which a ground layer (202) having a reference potential and a supply source (203) supplying a wireless communication signal are formed; and the antenna device (100).

A hearing instrument comprises a wireless communication unit interconnected with an antenna for emission and reception of an electromagnetic field having an RF wavelength, a speaker interconnected with the wireless communication unit and being configured to provide an output audio signal. A battery is configured to supply power to the hearing instrument and a filter circuit interconnects the battery and a power management circuit of the hearing instrument. The antenna extends from a feed and at least a part of the antenna being is arranged adjacent the battery. A distance between the at least part of the antenna and the battery is below 1/40 of the wavelength. The filter circuit is configured to de-couple the battery and the power management circuit at frequencies above 3 MHz and configured to connect the battery to the power management circuit at frequencies below 300 kHz.

An antenna includes: a radiating element that is formed of a conductor and radiates electromagnetic waves when supplied with electrical power; and a parasitic element that is (i) formed of a conductor, (ii) provided near the radiating element so as to be electromagnetically coupled with the radiating element, (iii) provided in a plane substantially perpendicular to a plane including the radiating element, and (iv) guides the electromagnetic waves without being supplied with electrical power.

An antenna structure includes a metallic frame and a stub antenna. The metallic frame defines a slot and two gaps. The two gaps are positioned at two ends of the slot and are substantially perpendicular to the slot. The metallic frame is divided into a first portion and a second portion by the slot and the two gaps. A portion of the metallic frame surrounded by the slot and the two gaps forms the first portion. The first portion serves as a radiator of the antenna structure and is grounded through the second portion. The stub antenna is positioned at an interior of the metallic frame and is spaced from the radiator.

Disclosed are exemplary embodiments of omnidirectional broadband antennas. In an exemplary embodiment, an antenna generally includes a ground element, an antenna element, and an annular patch element. The antenna element may be electrically isolated from the ground element. The antenna element may include at least one portion that is substantially conical, substantially pyramidal, and/or that tapers in a longitudinal direction. The annular patch element is electrically grounded to the ground element. The annular patch element surrounds at least a portion of the antenna element and is parasitically coupled to the antenna element.

An antenna with pin header is provided, which may include a substrate, a feed point, a radiator and a metallic pin header. The feed point may be disposed on the substrate. The radiator may be printed on the substrate and connected to the feed point. The metallic pin header may penetrate through the radiator and the substrate. The metallic pin header may be connected to the feed point via the radiator, and the radiator and the metallic pin header may have a common feedline, whereby the metallic pin header can enhance the gain pattern, in the direction which the metallic pin header points in, of the radiator.

An antenna device for vehicle (10A) includes an antenna base (100), an antenna case (600) forming an accommodation space together with the antenna base (100), a first monopole antenna (210) accommodated in the accommodation space, and a first parasitic element (300) provided above the first monopole antenna (210).

A hearing instrument comprises a wireless communication unit interconnected with an antenna for emission and reception of an electromagnetic field having an RF wavelength, a speaker interconnected with the wireless communication unit and being configured to provide an output audio signal. A battery is configured to supply power to the hearing instrument and a filter circuit interconnects the battery and a power management circuit of the hearing instrument. The antenna extends from a feed and at least a part of the antenna being is arranged adjacent the battery. A distance between the at least part of the antenna and the battery is below 1/40 of the wavelength. The filter circuit is configured to de-couple the battery and the power management circuit at frequencies above 3 MHz and configured to connect the battery to the power management circuit at frequencies below 300 kHz.