Band-Notched UWB Antenna with Switchable and Tunable Performance

Figure 4

Distribution of the surface current on the feedline and the band-notched structure: (a) at 4.2 GHz when the state of PIN diodes is ON and bias voltage is 0 V; (b) at 5.8 GHz when the state of PIN diodes is OFF and bias voltage is 0 V.

(a)

(b)