Table 2: Comparisons between our design and previous dual-band CP antennas.

AntennaOverall size ()Impedance bandwidth (%)3 dB AR bandwidth (%)HPBWa

Ref. [9]0.483 × 0.483 × 0.0152.30.62100°
3.10.69114°

Ref. [10]0.524 × 0.524 × 0.224≥10≥10135°
≥10≥10112°

Ref. [11]0.211 × 0.211 × 0.0575.54.2120°
6.12.6116°

Ref. [12]0.573 × 0.573 × 0.29646.313.0103°
30.2111°

Ref. [13]0.368 × 0.368 × 0.1056.5Not given108°
8.2Not given107°

Ref. [14]0.38 × 0.38 × 0.0249.11.5<60°
5.11.1<60°

This work0.523×0.523×0.01832.74.1103°
6.5113°

λ0 is the wavelength in air at the lower center frequency. aThe lower value in the xoz and yoz planes.