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A single layer dual band circularly polarized microstrip antenna for GPS applications

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2 Author(s)
Fan Yang ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Rahmat-Samii, Y.

Most current GPS receivers only use the L1 frequency of 1.575 GHz with right hand circular polarization. However, in some applications that need more accurate information, differential GPS is employed and an antenna is required to cover both L1 and L2 (1.227 GHz) bands with CP patterns. Recently, we proposed a square patch antenna with switchable slots for dual band CP operation (see Yang, F. and Rahmat-Samii, Y., Electronics Lett., vol.37, p.1002-3, 2001). It has attractive features of a single layer, a single feed, and small frequency ratio. Hence, such an antenna is proposed for GPS applications. The antenna structure and its design procedure are detailed.

Published in:

Antennas and Propagation Society International Symposium, 2002. IEEE  (Volume:4 )

Date of Conference:

2002