A small CP-printed antenna using 120/spl deg/ sequential rotation

We present a small printed antenna with broadband impedance and axial ratio (AR) characteristics. The antenna consists of three sequentially rotated shorted equilateral patches, with excitation phasings of 0/spl deg/, 120/spl deg/, and 240/spl deg/, respectively. The measured 10-dB return loss and 3-dB AR, bandwidths of the compact antenna are 31% and 27.5%, respectively.