A micro electromechanical phase shifter base on the fractal geometries is proposed to work at Ku frequency band with at least 23% lower actuation voltage compared to the simple rectangular membrane counterparts. In this design the membrane of the switch is chosen to be a Koch fractal and then a distributed MEMS phase shifter is set up by cascading a distinct number of these switches. This phase shifter is analyzed to obtain its parameters such as differential phase shift, group delay, and insertion and return loss. It will be shown that this phase shifter could be used as a low loss multi bit phase shifter system because of its low insertion loss and power consumption.
Abbas Ali Lotfi-Neyestanak,
"Fractal Beam Ku-Band MEMS Phase Shifter," Progress In Electromagnetics Research Letters,
Vol. 5, 73-85, 2008. doi:10.2528/PIERL08101703
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