Compact Circularly Polarized Multiband Antennas for RFID Applications

Figure 8

Gain patterns at different resonant frequencies in both E- and H-planes.

(a) 2.4 GHz, 𝜙=0^∘

(b) 2.4 GHz, 𝜙=90^∘

(c) 5.25 GHz, 𝜙=0^∘

(d) 5.25 GHz, 𝜙=90^∘

(e) 5.85 GHz, 𝜙=0^∘

(f) 5.85 GHz, 𝜙=90^∘

(g) 5.95 GHz, 𝜙=0^∘

(h) 5.95 GHz, 𝜙=90^∘