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Circular polarization‐agile microstrip antenna for wireless access in vehicular environments

In this article, a new reconfigurable microstrip antenna with circular polarization‐agile capability is presented for wireless access in vehicular environments (WAVE). The proposed antenna consists of a circular microstrip radiator on a back‐sided circular slot with an adding tab and a trimmed slot with two PIN diodes. The circular slot in the ground acts as a perturbing element to generate both left‐ and right‐handed circular polarization without shifting the resonant frequency. Both of circular polarization senses can be successfully alternated by controlling the states of diodes. The implemented antenna shows a good agreement with the simulation results and excellent controllability with symmetrical radiation at the identical resonant frequency. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2310–2313, 2014