Compact single-layer circularly polarized antenna for short-range communication systems

Dedicated short‐range communications (DSRCs) is a short‐to‐medium range wireless protocol designed for automotive systems. This article describes the development of a one‐layer compact left‐hand circularly polarized antenna with a footprint and characteristics suitable for on‐board‐unit antenna of a DSRC system. The size of the developed prototype is 40 × 40 × 1.55 mm3 and exhibits a circularly polarized gain of about 4.68 dBc with a cross polarization discrimination of about 22.5 dB.