Smart RFID Antenna

for the whole process chain

Multibeam Antenna

Detecting and reading RFID tags precisely

Multibeam-Antenne
© Fraunhofer IIS/Thomas Endres

In the future, the use of RFID technology will continue to increase, and it should be possible to read more and more RFID tags simultaneously. Currently, this development is presenting commercially available reader antennas with almost insurmountable challenges.

The new multibeam antenna from Fraunhofer IIS, on the other hand, can read all RFID chips securely and reliably. Its areas of application lie in logistics and trade, such as customs inspections and transport or manufacturing processes.

High reading rates

Computer animation of the multibeam antenna reading out RFID tags
© Fraunhofer IIS/Fabian Leander Sinzinger
Multibeam antennas read out RFID tags accurately

The multibeam antenna is a programmable 2x2 group antenna with a feed network for RFID applications. The multibeam antenna is so innovatively designed that it offers a higher reading rate than conventional reader antennas. The directional beam of the antenna can be adjusted individually in up to nine directions. This allows RFID transponders to be addressed and read in a targeted manner, also reducing collisions. The reading rate becomes faster and the probability of intercept becomes greater. This guarantees reliable reading of all transponders.

Innovative antenna design

The 2x2 group antenna with integrated feed network allows up to nine beam alignments. The multibeam antenna is comprised of four emitters, which are right-handed circularly polarized. The associated feed network that actuates the four individual antennas is based on the principle of the 4x4 butler matrix. The complete system is built with microstrip lines and the network comprises Wilkinson power splitters, squaring hybrids, rat-race hybrids, and delay lines. The larger visible area and the option of synchronizing the nine active beams with the position of the pallet to the reading gate guarantee maximum reading rates with a low number of antennas.

Flexible use in trade and logistics

Wherever reliable, secure reading of several RFID chips is needed, the multibeam antenna is your trusty partner. Its main areas of application are therefore to be found in logistics and trade. In the area of gateway passages, in particular, the reading rates and the reading reliability are of great importance. Mass products in various quantities and designs that are fitted with RFID transponders can thus be counted immediately and identified clearly. In industry and logistics, the antenna therefore results in enormous time savings. Customs inspections, for example, can be automated and greatly accelerated.

As well as transponders, efficient antennas are needed to use these automated reading gates. Only adept interaction of the transponders and antennas allows fast, contactless exchange of information.

Test measurement of the multibeam antenna
© Fraunhofer IIS/Sabine Metzger

Notice: Starting the video transfers usage data to youtube.

Expert consultancy and development

Together with you and taking well-founded scientific methods as our basis, we determine your requirements, advise you individually, and also support you with technical and economic feasibility analyses. We are also happy to help you embed the antenna into your system or with commissioning.

As an independent development facility, we are able to offer you an established hardware design flow from simulation to the end product. We can offer you modern simulation tools, measuring instruments and techniques, and our own antenna measuring chamber.

More information

 

Multibeam Antenna for RFID Applications in the UHF Range