Assemblies formed by additive manufacturing, radar absorbing structures, and related methods

A method of fabricating a radar absorbing structure, the method comprising:

• forming a first layer of a structure comprising a plurality of cells defined by structural elements, forming the first layer comprising:
• disposing a first filament segment comprising one or more additives dispersed in a matrix material on at least a portion of a platen;
• and
• disposing a second filament segment comprising one or more additives dispersed in a matrix material on at least other portions of the platen, the second filament segment exhibiting different electrical properties than the first filament;
• forming a second layer of the structure on the first layer, forming the second layer comprising:
• disposing another segment of the first filament on at least a portion of the first layer;
• and
• disposing another segment of the second filament on at least other portions of the second layer to form the structure comprising the plurality of cells;
• wherein the structure elements comprise at least one structural property changing in at least one direction and at least one electrical property changing in the at least one direction.