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Reconfigurable circularly polarized antenna for short-range communication systems

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5 Author(s)
Aissat, H. ; Equipe Systemes de Commun. et Microsystemes Lab., Univ. de Marne-la-Vallee ; Cirio, L. ; Grzeskowiak, M. ; Laheurte, J.-M.
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This paper describes the design rules of a compact microstrip patch antenna with polarization reconfigurable features (right-handed circular polarization (CP)/left-handed CP). The basic antenna is a circular coplanar-waveguide (CPW)-fed microstrip antenna excited by a diagonal slot and the CPW open end. This device is developed for short-range communications or contactless identification systems requiring polarization reconfigurability to optimize the link reliability. First, experimental and simulated results are presented for the passive version of the antenna excited by an asymmetric slot. A reconfigurable antenna using beam-lead p-i-n diodes to switch the polarization sense is then simulated with an electrical modeling of the diodes. Finally, the efficiency reduction resulting from the diode losses is discussed

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 6 )