Analysis of a transmission line periodically loaded with amplitude and/or position-modulated loads

The dispersion characteristics of a periodically loaded transmission line is engineered via varying the amplitudes and/or positions of the periodic shunt loads. The band diagram of the periodic structure is obtained using two approaches: the Bloch-Floquet approach and a Green's function-based approach. The effect of both amplitude and position modulation on the band diagram is discussed, to provide a step to bandgap engineering of the structure.