Circularly Polarized Low-Profile Antenna for Radiating Parallel to Ground Plane for RFID Reader Applications

Figure 11

Simulated results of (a) input impedance characteristics, (b) antenna gain, and (c) AR pattern with θ. 𝜙 = 90° in y-z plane at 925 MHz when the short, long, and F-shaped stubs are installed.

(a)

(b)

(c)