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Journal articles
Flexible serialized complementary coils for the detection of moving LF RFID tags
Abstract : This paper focuses on bats detection, tagged at low frequency (134.2 kHz) with glasstags (typically : length 15 mm and radius
1 mm). The physical link is magnetic coupling. We propose the
design of a reader antenna based on a multi-coil structure.
The goal is to obtain the highest surface of detection, at a
distance of 10-15 cm, i.e. defining a so called “volume of
detection”. The cylindrical volume of the glasstags involves a
high sensitivity to the magnetic field orientation. As the bats are
flying, the tags equivalent surfaces are considered with a random
orientation. Using complementary coils principle enables to
detect fruitfully the glasstags in two perpendicular orientations
named HM (horizontal mode) and VM (vertical mode). We
propose the design of a flexible reader antenna structure by
means of an adhesive copper tape fixed on a cloth. The prototype
is designed after CST simulations and empirical formula
evaluations. Measurements show a good agreement with the
modelling and tests of detection are performed with the
proposed reader antenna. By comparison with a commercial
antenna, the prototype reaches the highest volume of detection
in both HM and VM modes and fulfills the targeted distance of
detection.
Cited literature [18 references]
https://hal.archives-ouvertes.fr/hal-02114520
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, April 29, 2019 - 4:46:38 PM
Last modification on : Tuesday, June 2, 2020 - 7:36:04 AM
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, April 29, 2019 - 4:46:38 PM
Last modification on : Tuesday, June 2, 2020 - 7:36:04 AM
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