The goal of this study is to propose a wideband circularly polarised (CP) psi‐shaped antenna of high gain and wide bandwidth as necessitated by intelligent transportation system applications. A wide impedance bandwidth of 2 GHz (40%) centred at 5.3 GHz is achieved through the combination of modified TM 01 , TM 20 , and TM 21 modes with three slots on either radiating edge in the simple rectangular geometry of the antenna. The stacked patch configuration helps to achieve a minimum gain of 7 dBic in the entire bandwidth. The CP psi‐shaped antenna has an impressive axial ratio bandwidth of 1 GHz, which is >19% of its centre frequency 5.3 GHz. The proposed antenna can be used for detection of the blind spots of a vehicle at 5.88 GHz (DSRC frequency band), vehicle‐to‐vehicle communication at 5.2 GHz (WLAN IEEE 802.11a frequency band), and vehicle to roadside communication at 5.5 GHz (WiMAX IEEE 802.16 frequency band).
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Mondal et al. (2018) studied this question.
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