Abstract
The indirect solid freeform fabrication process is used to fabricate low‐loss complex geometry periodic dielectrics for use in the microwave range. Relevant processing details, such as mold fabrication, slurry rheology, curing, and binder burnout, are discussed. Woodpile electromagnetic bandgap structures exhibiting a −40 dB well were shown to be operational at frequencies >110 GHz. Novel designs of planar periodic dielectric resonators with Q= 965 at 33 GHz (Q= ratio of the power stored to power lost in the resonator) were realized in alumina. Metallo‐dielectric filters with low‐insertion loss were also created via ISFF; modeling of these structures using resistor‐inductor‐capacitor‐equivalent circuit analysis was performed to calculate a Q of 645.
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