{
  "annotation_id": "01172a32-0798-4df5-9003-72f8128a9edc",
  "date_created": "2026-03-02T18:00:57.395000Z",
  "date_modified": "2026-03-02T18:00:57.395000Z",
  "file_hash": "0fed8a224ea149f58599ba0b813b80aa26eb6ba66fb48331ac1785d82c5a78df",
  "private": false,
  "record": {
    "abstract": "An antenna prototype utilizing artificial impedance surfaces to control the\nnear field distribution is described. The antenna is a folded dipole placed\nabove a finite-size artificial impedance surface. We have found that the field\nscreening is most effective if the surface is a metal conductor. However, to\nachieve a reasonable value of the radiation resistance the dipole should be\nlocated far off the screen. If the surface is a magnetic wall, the antenna\ndesign is more compact, but the field behind the screen is large. Here we\nrealize a compromise solution using an inductive surface of a moderate surface\nimpedance, which allows realization of an effective near-field screen with\nstill a reasonably low-profile design.",
    "arxiv_id": "physics/0504123",
    "authors": [
      "Stanislav Maslovski",
      "Pekka Ikonen",
      "Constantin Simovski",
      "Mikko Karkkainen",
      "Sergei Tretyakov",
      "Vasil Denchev"
    ],
    "categories": [
      "physics.class-ph",
      "physics.gen-ph"
    ],
    "title": "Improving antenna near-field pattern by use of artificial impedance   screens",
    "url": "https://arxiv.org/abs/physics/0504123"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8322fbf2-efd3-4601-9516-c45115149680",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}