Investigation of a photodefinable glass substrate for millimeter-wave radios on package

Photodefinable glass has been investigated for applications at mm-wave frequencies. Test structures including through-glass vias, transmission lines and microstrip patch antennas have been fabricated and fully characterized up to 67 GHz. Good correlation was obtained between simulation and measurements. The antenna exhibited return loss better than 10 dB in the frequency band of interest. Via transition losses were less than 0.15 dB/via and the transmission line insertion loss was ~ 3.3 dB/cm at 60 GHz.

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