Abstract
A BCB based 60 GHz band pass filter implemented on Al2O3 substrate has been successfully designed, fabricated and tested. The CPW bended square open-loop resonator design has been adopted for its bending structure is beneficial to the size reduction. Al2O3 substrate is selected for reducing the process steps. The measurement results show a 45 GHz to 63 GHz bandwidth with an insertion loss of −1.8 dB across the band. Au and Cu filmed filter layer S-parameters are compared. The band rejection of −30 dB at 20 GHz and −20 dB at 100 GHz are observed.
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