A Broadband Single-Feed Circularly Polarized Patch Antenna with Wide Beamwidth

Figure 3

Current distribution of the feed line and the ground plane for different values of the phase angle. (a) 0°. (b) 30°. (c) 60°. (d) 90°. (The red circle shows the minimum current on the microstrip ring.)

(a)

(b)

(c)

(d)