High-Performance Polymer Microwave Fiber Coupler in eWLB Package for Sub-THz Communication

In this paper, a compact and efficient transceiver integrated circuit (IC) to polymer microwave fiber (PMF) coupler realized in an embedded wafer level ball grid array (eWLB) package is presented for the first time. The proposed solution uses a Vivaldi antenna realized using the redistribution layer of eWLB. The system operates around 140 GHz and achieves a coupling loss of only 4 dB.