Frequency Reconfigurable Circular Patch Antenna with an Arc-Shaped Slot Ground Controlled by PIN Diodes

Figure 5

The normalized magnitude (left) and vector (right) current distributions on the ground plane at different switching states, where (a) and (d) are at F1 state, (b) and (e) are at F3 state, (c) and (f) are at F5 state, and the black arrows point to the PIN diodes with ON state.