Kyocera introduces its 60GHz broadband Ball-Grid-Array package.
60GHz Ball Grid Array LTCC Substrate
It is LTCC substrate with 3milli-ohm/sq. copper-trace. The measurement results per RF port (package surface to printed wiring board surface) are as follows:
Insertion loss < 0.5dB @ 60GHz Return loss < -15dB @ 60GHz