
Rev Australasia V2.3 12/04
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the read field is laid over at 6o degrees. The Images below show tags being read in various
orientations.
Another benefit of laying the coils over at an angle is to ensure that if a null zone is formed in the
centre zone of the antenna, it (the null zone) will be on an opposing angle of 60 degrees. This
means that it will be almost impossible for an animal to move through the antenna and follow the
null zone (60 degrees to horizontal). Allflex has a Patent Pending for the portal reader.
Naturally a key benefit of the portal reader is that there is far less dependency upon what ear
carries the RFID device.
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