An On-Chip Integrated Structure for Terahertz Band Stop Filter/Absorber Based on Reflection Wave Cancellation

In this paper, the structure combining complementary split ring resonator (CSRR) and split ring resonator (SRR) with fin line is proposed for band stop filter or waveguide absorber. The results indicated that the proposed structure would reduce the reflection and enhance the absorption by the reflection wave cancellation, which allows filtering and absorbing application in terahertz. The bandwidth can be expanded by increasing the number of resonance cells and the whole structure is very convenient to connect with standard rectangular waveguides.