摘要:
Antennas that can transceive signals in a horizontally-polarized, omni-directional manner are described. In an example embodiment, an antenna comprises a spiraling surface having a spiral cross-section, the surface forming an internal cavity, an internal channel to the external surface, and an internal wall common to the cavity and the channel. Further, an example embodiment comprises a longitudinal opening allowing access to the cavity and the channel by a transmission feed line. Alternate embodiments comprise various cross-sectional configurations, and may also comprise a radome at least partially surrounding the antenna spiraling surface and supporting structure.
摘要:
Die Erfindung betrifft eine Antenne für einen rückstreubasierten RFID-Transponder mit einer eine kapazitive Eingangsimpedanz aufweisenden integrierten Empfangsschaltung zum Empfangen eines spektral in einem Betriebsfrequenzbereich liegenden Funksignals, wobei die Antenne zwei Antennenzweige aufweist, die sich spiralförmig von einem zentralen Bereich, in dem die Antennenzweige mit der integrierten Empfangsschaltung verbindbar sind, nach außen erstrecken. Erfindungsgemäß ist eine ringförmige Leiterbahn vorgesehen, die sich vollständig um den zentralen Bereich erstreckt und ausgestaltet ist, die Antennenzweige leitend miteinander zu verbinden. Die Erfindung betrifft weiterhin einen rückstreubasierten RFID-Transponder mit einer solchen Antenne.
摘要:
Disclosed is an antenna coupler (1) for testing mobile radio devices. Said antenna coupler (1) comprises a receiving element for retaining the mobile radio device and a two-arm planar helical antenna (17) which is disposed thereunder and is used for wireless communication with the mobile radio device.
摘要:
Antennas for use in mobile communication devices are disclosed. The antennas disclosed can include a substrate with a base, a top, a front side and a back side; a first conductor can be located on the first side of the antenna substrate; and a second conductor can be located on the second side of the antenna substrate. The conductors can have single or multiple branches. If a conductor is a single branch it can, for example, be a spiral conductor or a conducting plate. If a conductor has multiple branches, each branch can be set up to receive a different frequency band. A conductor with multiple branches can have a linear branch and a space-filling or grid dimension branch. A conducting plate can act as a parasitic reflector plane to tune or partially tune the resonant frequency of another conductor. The first and second conductors can be electrically connected.
摘要:
An antenna for RFID tag which can be mounted directly on the surface of a management object without using a spacer whatever material the surface of the object might be made of. This antenna for RFID tag (34) is electrically connected with an IC chip and mounted on an article (11). The antenna for RFID tag (34) comprises a soft magnetic member (26) formed into a flat plate and mounted on the article (11) at its back and a coil body (14b) fixed directly or with a predetermined spacing on the soft magnetic member, spirally wound and having such a number of turns or a diameter that it has a predetermined characteristics value in the wound state.
摘要:
An antenna for RFID tag which can be mounted directly on the surface of a management object without using a spacer whatever material the surface of the object might be made of. This antenna for RFID tag (34) is electrically connected with an IC chip and mounted on an article (11). The antenna for RFID tag (34) comprises a soft magnetic member (26) formed into a flat plate and mounted on the article (11) at its back and a coil body (14b) fixed directly or with a predetermined spacing on the soft magnetic member, spirally wound and having such a number of turns or a diameter that it has a predetermined characteristics value in the wound state.
摘要:
The inventive device has a spiral antenna formed by means of conductors which are arranged on the same plane and embodied in the form of a bifilar helix. Two space arrays are arranged on said plane and connected to conductors of two side whorls of the bifilar helix in an opposed manner. The bifilar helix is embodied as a rectangle, in the form of transmission lines having square whorls. Each space array is embodied in the form of an equilateral trapezium and connected to the top of the smaller base thereof. The bases of the equilateral trapeziums are parallel to the transmission lines of the bifilar helix.
摘要:
An antenna (10), and method of forming the same, is provided that receives or transmits three components of low frequency magnetic fields while having physical dimensions that can be easily housed inside a slim borehole tool. The antenna (10) includes a permeable core (18) and a plurality of sets of windings of conductive wire surrounding the permeable core (18), with each set of plurality of sets having a cross-sectional area associated therewith, with the cross-sectional of the remaining sets. Typically, the cross-sectional area of each of the plurality of cross-sectional areas extend orthogonally to the cross-sectional areas of the remaining cross-sectional areas of the plurality of cross-sectional areas.