{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:MDLY5KL7FJ2GH6K6O6AX3QT6QD","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"118a2a62a5581cf67b5e16040bd7886a6cf77ed53e25f5445ae7a90a181204e3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-03-09T14:37:19Z","title_canon_sha256":"1149e40b8b1a6ff0e0812a0bd86b440bea1a47fd53a77fdad3c0e00c05b15ab4"},"schema_version":"1.0","source":{"id":"1703.03793","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.03793","created_at":"2026-05-18T00:45:06Z"},{"alias_kind":"arxiv_version","alias_value":"1703.03793v2","created_at":"2026-05-18T00:45:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.03793","created_at":"2026-05-18T00:45:06Z"},{"alias_kind":"pith_short_12","alias_value":"MDLY5KL7FJ2G","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MDLY5KL7FJ2GH6K6","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MDLY5KL7","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:a48947ad089bb8292e3f0de35969b78275d674c9fc51d52e0075bde777a45291","target":"graph","created_at":"2026-05-18T00:45:06Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We apply the transformation-optics approach to the design of a metamaterial radome that can extend the scanning angle of a phased-array antenna. For moderate enhancement of the scanning angle, via suitable parameterization and optimization of the coordinate transformation, we obtain a design that admits a technologically viable, robust and potentially broadband implementation in terms of thin-metallic-plate inclusions. Our results, validated via finite-element-based numerical simulations, indicate an alternative route to the design of metamaterial radomes which does not require negative-valued","authors_text":"Giuliana D'Alterio, Giuseppe Castaldi, Massimo Moccia, Maurizio Feo, Roberto Vitiello, Vincenzo Galdi","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-03-09T14:37:19Z","title":"Transformation-Optics-Based Design of a Metamaterial Radome for Extending the Scanning Angle of a Phased Array Antenna"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03793","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:2b30b980c9f9b3411220d5400e465004ff2ab5157b70298537f4d44fbdb9bca4","target":"record","created_at":"2026-05-18T00:45:06Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"118a2a62a5581cf67b5e16040bd7886a6cf77ed53e25f5445ae7a90a181204e3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2017-03-09T14:37:19Z","title_canon_sha256":"1149e40b8b1a6ff0e0812a0bd86b440bea1a47fd53a77fdad3c0e00c05b15ab4"},"schema_version":"1.0","source":{"id":"1703.03793","kind":"arxiv","version":2}},"canonical_sha256":"60d78ea97f2a7463f95e77817dc27e80edf25969150b310df65e77ce09df02cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"60d78ea97f2a7463f95e77817dc27e80edf25969150b310df65e77ce09df02cb","first_computed_at":"2026-05-18T00:45:06.083380Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:06.083380Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jDDxkMAQJ5YU25bEUfP73byHv2AXeQAAnMSHn23/MDbBaaEKt+poAmZxvhQNki4wJ5SokEScIsB6LiMx6r/xCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:06.083822Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.03793","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b30b980c9f9b3411220d5400e465004ff2ab5157b70298537f4d44fbdb9bca4","sha256:a48947ad089bb8292e3f0de35969b78275d674c9fc51d52e0075bde777a45291"],"state_sha256":"97fcad5e6d77914d6921ec6a9d02eab5d30a4663f992ca3d8b9deaaa6588d3db"}