Triband Omnidirectional Circularly Polarized Dielectric Resonator Antenna with Top-Loaded Alford Loop

Figure 3

Simulated return loss and axial ratio (theta = 90 deg and phi = 0 deg) of various antennas involved. (a) Ant. I, (b) Ant. II, and (c) Ant. III.

(a)

(b)

(c)