Nxp B.v.

Navigator Remote Limited Liability Company

Christian Scherabon

Franz Amtmann

Roland Brandl

Anton Salfelner

Joachim Heinz Schober

Hubert Watzinger

Michael Cernusca

Robert Spindler

Bernhard Gruber

Anton Salfener

Wolfgang Steinbauer

Joachim Schober

A semiconductor chip () for a transponder () comprises a chip substrate () with a surface (), chip terminals () arranged on the surface (), and a passivation layer () covering the surface () and completely covering the chip terminals (), so that an antenna () with antenna terminals () can be attached to the chip () above the chip terminals (), so that the chip terminals (), the passivation layer () and the antenna terminal () form first capacitors.

Semiconductor chip, transponder and method of manufacturing a transponder

The invention relates to a method of operating a RFID system comprising at least one reader () and a plurality of wireless data carriers (), each of which comprise at least one data processing element with slow response (), wherein the method controls the at least one reader () to continuously communicate with one of the plurality of wireless data carriers (), while at least another one of the plurality of wireless data carriers () is processing data with its at least one slow response element (). The invention further relates to a RFID system comprising at least one reader () and a plurality of wireless data carriers (), each of which comprises at least one slow response element (), wherein the system is capable to continuously communicate with at least one of the plurality of wireless data carriers (), while at least another one of the plurality of wireless data carriers () is processing data with its at least one slow response element ().

Method of operating a RFID system

With an RFID system for communicating between reading units (R, R) and transponders (T, T) in at least two different scan areas (S, S), wherein at least one reading unit (R, R) and at least one antenna (A-A, B-B) communicating with the reading unit are allocated to each scan area (S, S) for the radiation of electromagnetic signals (EA-EA, EB-EB) in the scan area (S, S), the antennas (A-A, B-B) are designed in such a way that at least one antenna (A, A) of a scan area (S) has a different polarization and/or a different polarization rotation direction relative to at least one antenna (B, B) of another scan area (S).

RFID system, gate arrangement with RFID system and method of detecting transponders

An RFID system comprises at least one reading device () and at least one transponder (), which are configured for non-contact communication by means of modulated electromagnetic signals (SS), which contain data and/or commands packed in data frames, in which the reading device () is configured for transmitting a group of data frames (D-SYNC), which contain synchronization information (Preamble, Start Delimiter) for synchronization with the transponder () and to transmit another group of data frames (D-NOSYNC) which do not contain such synchronization information, in which the transponder () has synchronization means () which are configured to effect synchronization with the reading device () with the help of synchronization information (Preamble, Start Delimiter) contained in received data frames (D-SYNC) and synchronization status test means () configured for detecting whether the transponder runs synchronously with the reading device and in the event of it not running synchronously, to switch on the synchronization unit ().

Sychronization during anti-collision

In a receiving method for the contactless reception of identification information (I), which is stored in a data carrier (') and which can be received from the data carrier () in a contactless manner in the form of information units (IU, IU&#x2032;) with a communication device (), it is envisaged that firstly an information unit (R.IU) is received and that secondly it is detected that the received information unit (R.IU) represents a collision of two different information units (IU, IU&#x2032;) occurring essentially simultaneously, of which two different information units (IU, IU&#x2032;) the one information unit (IU) originates from a first data carrier () and the other information unit (IU&#x2032;) originates from a second data carrier (&#x2032;), and that thirdly a received information unit (R.IU) that represents a collision is replaced with a first replacement information unit (R.IU) established by the communication device (), which is used instead of the information unit (R.IU) representing the collision, as the information unit (IU) that originates from the first data carrier (), and that fourthly, the first replacement information unit (R.IU) is delivered in a contactless manner.

Communication system and anti-collision method

A method recognizes whether a transponder designed for communicating with a communication station belongs to one of at least two groups of transponders. First, for each group of transponders, a check data block that is significant for the group of transponders is generated. Then, the data from the check data block that is significant for the group of transponders is evaluated for the recognition of whether the transponder belongs to the group of transponders.

Method of recognizing whether a transponder belongs to a group of transponders

During the implementation of an anticollision method by a reader station () to identify all data carriers () in the communication field (HF), in order to shorten the time slots (S) in which none of the data carriers () is responding or in which a collision of multiple responses from the data carriers () occurs, a time-slot progressing information (ZWI) is sent by the reader station (). The time-slot progressing information (ZWI) contains a time-slot number (ZN), which identifies the time slot (Si) next in line after the current time slot (S).

Growing community of inventors

Graz, Austria

Christian Scherabon