Design and Fabrication of Band-Pass Filter on Glass IPD for 5G New Radio

Band pass filter design based on glass integrated passive device (IPD) technology for n77 and n79 bands in 5G new radio (NR) is demonstrated in this paper. The pass band loss for n77 filter is only 1.4dB from 3.3 to 4.2 GHz, and the attenuation at 2.69 and 5.15 GHz is 30dB. For n79 filter, the pass band loss is 2.0 dB from 4.4 to 5.0 GHz, and the attenuation is 35 dB at 2.69 GHz and 17 dB at 5.49 GHz. The XY dimension for both filters is 2.0 mm x 1.25 mm which is the same as existing LTCC solution, but the IPD filter thickness is only 0.3 mm that is advantageous to filter integration in RF front-end module (FEM).