Tunable frequency selective surface using L-shaped slots

The unit cell study for a tunable Frequency Selective Surface (FSS) is discussed in this paper. L-shaped slots with varying lengths are used as elements for the FSS. This shape has advantages of reduced size and arranging more L-shaped slots. For multiband operations, multiple L-slots can be used. A case with two L-shaped slots is presented in this paper. For tuning to a desired frequency, all slots except the slot resonant at that frequency have to be shorted using solid-state electronics or micro-electromechanical systems.