Fig. 1. Schematics of antenna structure

Fig. 2. The parameter S₁₁ with different value of l, S_t, L₁

Fig. 3. Simulated radiation pattern of the antenna at different frequencies

Fig. 4. Structure of the metal-baffle loaded antenna

Fig. 5. The parameters S₁₁ of antenna with or without baffle

Fig. 6. Radiation pattern of the metal-baffle-loaded antenna at different frequencies

Fig. 7. Gain of antenna at different frequencies

Fig. 8. Simulated and measured S₁₁