This letter proposes collimator designs composed of dual dielectric materials for microwave beam splitting and focusing using the phase-field design method. Polypropylene (PP) and paraffin were selected as dielectric materials considering the mechanical durability and manufacturing feasibility for an experimental verification. We fabricated designed collimators using a three-dimensional printing device and performed experimental verifications using a two-dimensional electric field scanner. It is confirmed that measurement results fairly agree with simulation results. Improvement of mechanical durability obtained from dual dielectric structures is also verified through numerical analysis.
Bibliographical noteFunding Information:
Manuscript received July 2, 2018; accepted July 30, 2018. Date of publication August 3, 2018; date of current version August 31, 2018. This work was supported in part by the National Research Foundation of Korea funded by the Korea Government under Grant NRF-2016R1A2B4008501 and in part by the Agency for Defense Development of Korea under Grant UD160026GD. (Corresponding author: Jeonghoon Yoo.) J. Go was with the School of Mechanical Engineering, Yonsei University, Seoul 03722, South Korea. He is now with the Hyundai Motors Namyang Institute, Gyeonggi-do 445-706, South Korea (e-mail:,zzzgo@ naver.com).
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering