Low-Loss, Wideband Transition for eWLB Packages to Plastic Microwave Fiber at D-Band Frequencies
| Reference number | |
| Coordinator | Ericsson AB - Ericsson Research |
| Funding from Vinnova | SEK 55 000 |
| Project duration | January 2025 - June 2025 |
| Status | Ongoing |
| Venture | 6G - Competence supply |
| Call | 6G - Supervision of degree work |
Purpose and goal
This master´s thesis investigates the coupling mechanisms between eWLB packages and plastic microwave fiber (PMF). The goal is to reduce power losses that occur in the current coupling solution, where a Vivaldi antenna radiates directly into the PMF. We focus on simulating, analyzing, and evaluating alternative coupling solutions to enhance signal transmission efficiency. Then, the most promising solution will be fabricated and measured to verify its performance in a realistic environment.
Expected effects and result
The goal is to improve coupling between the Vivaldi antenna and PMF, reducing losses and enhancing transmission efficiency in the D-band (110–170 GHz). By exploring dielectric structures like lenses and reflectors, the aim is to minimize radiation loss. A better transition element can enable higher data rates, lower energy consumption, and more reliable wireless communication, supporting next-generation technologies. This structure may also serve as a connector to hold the PMF in place.
Planned approach and implementation
The thesis starts with a literature study on coupling solutions between MMIC chips and waveguides, focusing on circular dielectric waveguides. Simulations analyze PMF properties, Vivaldi antenna interaction, and losses. To improve coupling, dielectric structures like lenses and reflectors are tested. The model is expanded to include PCB, eWLB packaging, and fiber holder. Finally, the best solution is fabricated, measured, and analyzed for practical feasibility.