First Demonstration of 28 GHz and 39 GHz Transmission Lines and Antennas on Glass Substrates for 5G Modules

High-performance and ultra-miniaturized mm-wave building block structures were demonstrated on panel-scale processed 3D glass packages for high-speed 5G communication standards at 28 and 39 GHz bands. To demonstrate the benefits of glass for 5G communications, various topologies of microstrip-fed patch antennas for different resonant frequencies and compact conductor-backed co-planar waveguides were modeled and designed for high bandwidth and efficiency in the mm-wave bands. The simulation results for insertion loss, antenna gain, and bandwidth are consistent with the measured values on the glass substrates. The fabricated conductor-backed coplanar waveguides show insertion losses of 0.2 –0.3 dB/mm with a channel length of 1.86 mm, and the fabricated antennas have more than around 6% bandwidth in the frequency range of 35 to 39 GHz.

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