Special Electrode Structures for High 100 GHz and Above Frequencies

Special Electrode Structures for High (100 GHz and above) Frequencies 

As already noted, resistive loss in metal electrode structures and in transition from millimeter wave waveguides to the electrode structure is the greatest problem in achieving 100 GHz and higher electro-optic modulation. Fetterman and co-workers [301] have shown by pulse techniques that the 3-dB bandwidth of polymeric electro-optic materials is typically in the order of 360 GHz for 1 cm of material. Stripline electrode structures have been used to achieve operation to somewhat above 100 GHz. Fetterman and co-workers [282] have recently described a novel finline transition between a millimeter waveguide and such elec- 

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