Fundamental Limits on Substructure Dielectric Resonator Antennas

Autor:	Yang, Binbin, Kim, Jaewoo, Adams, Jacob J.
Rok vydání:	2021
Předmět:	Physics - Applied Physics
Druh dokumentu:	Working Paper
Popis:	We show theoretically that the characteristic modes of dielectric resonator antennas (DRAs) must be capacitive in the low frequency limit, and show that as a consequence of this constraint and the Poincar\'{e} Separation Theorem, the modes of any DRA consisting of partial elements of an encompassing super-structure cannot resonate at a frequency that is lower than that of the encompassing structure. Thus, design techniques relying on complex sub-structures to miniaturize the antenna, including topology optimization and meandered windings, cannot apply to DRAs. Due to the capacitive nature of the DRA modes, it is also shown that the Q factor of any DRA sub-structure will be bounded from below by that of the super-structure at frequencies below the first self-resonance of the super-structure. We demonstrate these bounding relations with numerical examples. Comment: 10 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2108.04691 Zobrazit plný text záznamu View this record from Arxiv