Does each application require a custom-designed antenna or does the standard tag

If one is talking about EPC UHF Class 1 Gen 2 tags, there are many designs from which to choose, and it is very likely that one of those will work well with your application, unless extreme conditions (for example, temperature or humidity) exist. However the performance of a tag in terms of readability depends on much more than antenna design. In general, the larger a tag��s antenna the more likely an interrogator can read it, but read rates between large antennas and smaller antennas are not necessarily dramatically different. Other areas that need to be considered are the tag��s ability to extract/consume/reflect an RF signal from an interrogator, whether distance or orientation to the interrogator changes a tag��s performance, how nearby materials affect read rates, and the power of the backscatter. The cost and availability of tags needs to be considered, too. It is wise to conduct a number of tests on a variety of products under different conditions to arrive at several tags that match the application.t

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