A Varactor-Tunable Rasorber Using Tripole and Ring Slot Elements

<div>The simulated <i>S</i> parameter of the tunable passband: (a) |<i>S</i><sub>11</sub>| and (b) |<i>S</i><sub>21</sub>|.</div>

International Journal of Antennas and Propagation

Figure 5: A Varactor-Tunable Rasorber Using Tripole and Ring Slot Elements 