Low-Loss, Wideband Transition for eWLB Packages to Plastic Microwave Fiber at D-Band Frequencies

Important results from the project

The thesis presents an improved coupling solution between eWLB packages and polymer microwave fibers (PMF) for sub-THz (130–150 GHz). PMF is an inexpensive and flexible communication alternative, but current coupling solutions suffer from significant losses. The new dielectric structure, optimized in HFSS and fabricated using 3D printing, demonstrates up to 2.2 dB improved coupling. The solution is compact, easy to mount, and enables efficient integration of PMF with eWLB on PCBs.

Expected long term effects

With the improved coupling solutions developed in this thesis, and within the framework of the EU project 6GTandem, we will be able to demonstrate improved data transmission rates of reaching hundred Gbps through PMF in our final showcase planned for 2026.

Approach and implementation

The project began with several alternative solutions, but due to the thesis timeframe, a more practical path was chosen. The proposed structure could be developed and tested according to plan. The activities were relevant, the collaboration worked well, and no major external factors negatively affected the project. Some ideas had to be excluded, but the project developed as intended and the goals were met within the schedule.