{"ID":2893537,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2507.13119","arxiv_id":"2507.13119","title":"Generalized Scattering Matrix Framework for Modeling Implantable Antennas in Multilayered Spherical Media","abstract":"This paper presents a unified and computationally efficient framework for modeling antennas embedded in spherically stratified media, applicable to implantable biomedical antennas and radome-enclosed systems. The method separates the characterization of the radiator from that of the surrounding medium by combining the antenna's free-space generalized scattering matrix (GSM) with a set of extended spherical scattering operators (SSOs). This decoupling enables rapid reevaluation under arbitrary changes of the spherical medium without re-simulating the antenna, yielding orders-of-magnitude speedups over traditional DGF-based MoM approaches. The SSO formulation accommodates multilayer, radially inhomogeneous, and radially uniaxial anisotropic profiles, and the GSM can be obtained from diverse numerical solvers or far-field data, supporting array-level synthesis and measurement-driven modeling. Extensive examples confirm excellent agreement with full-wave and DGF-based solutions, demonstrating the accuracy, generality, and practical versatility of the proposed framework.","short_abstract":"This paper presents a unified and computationally efficient framework for modeling antennas embedded in spherically stratified media, applicable to implantable biomedical antennas and radome-enclosed systems. The method separates the characterization of the radiator from that of the surrounding medium by combining the...","url_abs":"https://arxiv.org/abs/2507.13119","url_pdf":"https://arxiv.org/pdf/2507.13119v2","authors":"[\"Chenbo Shi\",\"Xin Gu\",\"Shichen Liang\",\"Jin Pan\"]","published":"2025-07-17T13:33:54Z","proceeding":"math.NA","tasks":"[\"math.NA\",\"eess.SP\"]","methods":"[]","has_code":false}