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Circularly Polarized Antennas

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Encstore has a wide selection of antennas with different types of polarization. When selecting the best RFID antenna for your application, you should consider the polarization of your antenna. This may impact the performance of your RFID read zone. A circular polarization antenna revolves in a corkscrew pattern, making one full rotation for each wavelength.  Antennas can have either right- or left-handed circular polarization. These left and right circular polarization antenna release electromagnetic waves in a spiral motion. The electric field vector rotates counterclockwise as far as it gets from the antenna, which is called left-hand circular polarization (LHCP). When it rotates clockwise, call it right-hand circular polarization (RHCP). Circularly polarized RFID antennas are ideal for reading a wide range of RFID tags on different surfaces in a restricted area.
Circularly polarized antennas have a shorter read range than linearly polarized antennas of the same strength because they lose around 3 dB by splitting their power across two different planes. If your tag orientation is not constant, you will most likely need to install a circularly polarized antenna. Please contact us if you need help identifying which type of antenna is best for you!

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