Nobuki Hiramatsu

Nonradiative dielectric waveguide using cordierite ceramics

Nonradiative dielectric waveguide (NRD-guide) using low-loss cordierite ceramics (/spl epsiv//sub r/=4.9, tan /spl delta/=2.6/spl times/10/sup -4/ at 59 GHz) was examined at 60 GHz. High permittivity of the cordierite ceramics reduced the size of the waveguide compared with a conventional one of polytetrafluoro-ethylene (PTFE). The RF unit for 60 GHz FM-CW radar sensor was built in a 33 mm/spl times/33 mm/spl times/20 mm housing. We confirmed that the unit clearly detects a target located at distances of 5 to 148 m.

60 GHz AMC antennas in multi-processor multi-chip data transmission

This paper mainly discusses the preliminary design of 60GHz antennas utilized in the multi-chip multi-core (MCMC) architecture. The antenna is designed with the low temperature co-fired ceramic (LTCC) fabrication process and the stacked via is selected as the vertical feeding. The designed antenna on the artificial magnetic conductor (AMC) demonstrates the high efficiency, impedance matching and enhanced end-fire radiation capabilities with the surface wave on the ground shielded conducting structures.