{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:XICEZU57YBZAW4UJMRMCEI5P7K","short_pith_number":"pith:XICEZU57","canonical_record":{"source":{"id":"1901.04895","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-15T16:03:06Z","cross_cats_sorted":[],"title_canon_sha256":"842a7cd4356323625163149639acc8e63c6b7bb2a2d04ad5f643e32521c6021a","abstract_canon_sha256":"e4190c25557a05f13f536f8959754a242c9e4623ce2328913709c77d534eac58"},"schema_version":"1.0"},"canonical_sha256":"ba044cd3bfc0720b728964582223affab0020b2984a67adce867aa5e891f887d","source":{"kind":"arxiv","id":"1901.04895","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.04895","created_at":"2026-05-17T23:56:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.04895v1","created_at":"2026-05-17T23:56:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.04895","created_at":"2026-05-17T23:56:21Z"},{"alias_kind":"pith_short_12","alias_value":"XICEZU57YBZA","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XICEZU57YBZAW4UJ","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XICEZU57","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:XICEZU57YBZAW4UJMRMCEI5P7K","target":"record","payload":{"canonical_record":{"source":{"id":"1901.04895","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-15T16:03:06Z","cross_cats_sorted":[],"title_canon_sha256":"842a7cd4356323625163149639acc8e63c6b7bb2a2d04ad5f643e32521c6021a","abstract_canon_sha256":"e4190c25557a05f13f536f8959754a242c9e4623ce2328913709c77d534eac58"},"schema_version":"1.0"},"canonical_sha256":"ba044cd3bfc0720b728964582223affab0020b2984a67adce867aa5e891f887d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:21.385578Z","signature_b64":"a92SEP68ZrE4mOuy8XjIZFkFMHCduKLQNmtBUKZ9CO6HWq42peh+qk3eEXfNIYkEkMb1yy9J4oI1Pp71FRwhBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba044cd3bfc0720b728964582223affab0020b2984a67adce867aa5e891f887d","last_reissued_at":"2026-05-17T23:56:21.384916Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:21.384916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.04895","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:56:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S3dQhWtXHnKw/+YHcMmFeYh6URc1LrI8WwQb8yrxtWRfk8xrU5cgUWlNJGMsEurmi7gP8V+5yfA6fQJbRBAVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:13:52.688954Z"},"content_sha256":"4fe840cfe64db0d8d52eb0ffcfbc28d9e6c8593b42868427b2e57c33748d400b","schema_version":"1.0","event_id":"sha256:4fe840cfe64db0d8d52eb0ffcfbc28d9e6c8593b42868427b2e57c33748d400b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:XICEZU57YBZAW4UJMRMCEI5P7K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Study Of a Wide-Angle Scanning Phased Array Based On a High-Impedance Surface Ground Plane","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Qiucui Li, Tian Lan, Xunya Jiang, Yushen Dou","submitted_at":"2019-01-15T16:03:06Z","abstract_excerpt":"This paper presents a two-dimensional infinite dipole array system with a mushroom-like high-impedance surface (HIS) ground plane with wide-angle scanning capability in the E-plane. The unit cell of the proposed antenna array consists of a dipole antenna and a four-by-four HIS ground. The simulation results show that the proposed antenna array can achieve a wide scanning angle of up to 65$^{\\circ}$ in the E-plane with an excellent impedance match and a small $S11$. Floquet mode analysis is utilized to analyze the active impedance and the reflection coefficient. Good agreement is obtained betwe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.04895","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:56:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+boSifBixCwzpZN9UH740TTpBPTH/McXPtGqk18cCAf7tNsMjVnXTpp1exnGo13MK/ePwzkN9H/Nph6KjRHeCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:13:52.689299Z"},"content_sha256":"bdb1eff9af24c1309d8db614b6f045f94f51bfd7882dad08a16511eec7d4123f","schema_version":"1.0","event_id":"sha256:bdb1eff9af24c1309d8db614b6f045f94f51bfd7882dad08a16511eec7d4123f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XICEZU57YBZAW4UJMRMCEI5P7K/bundle.json","state_url":"https://pith.science/pith/XICEZU57YBZAW4UJMRMCEI5P7K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XICEZU57YBZAW4UJMRMCEI5P7K/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T23:13:52Z","links":{"resolver":"https://pith.science/pith/XICEZU57YBZAW4UJMRMCEI5P7K","bundle":"https://pith.science/pith/XICEZU57YBZAW4UJMRMCEI5P7K/bundle.json","state":"https://pith.science/pith/XICEZU57YBZAW4UJMRMCEI5P7K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XICEZU57YBZAW4UJMRMCEI5P7K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XICEZU57YBZAW4UJMRMCEI5P7K","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":"e4190c25557a05f13f536f8959754a242c9e4623ce2328913709c77d534eac58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-15T16:03:06Z","title_canon_sha256":"842a7cd4356323625163149639acc8e63c6b7bb2a2d04ad5f643e32521c6021a"},"schema_version":"1.0","source":{"id":"1901.04895","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.04895","created_at":"2026-05-17T23:56:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.04895v1","created_at":"2026-05-17T23:56:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.04895","created_at":"2026-05-17T23:56:21Z"},{"alias_kind":"pith_short_12","alias_value":"XICEZU57YBZA","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XICEZU57YBZAW4UJ","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XICEZU57","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:bdb1eff9af24c1309d8db614b6f045f94f51bfd7882dad08a16511eec7d4123f","target":"graph","created_at":"2026-05-17T23:56:21Z","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":"This paper presents a two-dimensional infinite dipole array system with a mushroom-like high-impedance surface (HIS) ground plane with wide-angle scanning capability in the E-plane. The unit cell of the proposed antenna array consists of a dipole antenna and a four-by-four HIS ground. The simulation results show that the proposed antenna array can achieve a wide scanning angle of up to 65$^{\\circ}$ in the E-plane with an excellent impedance match and a small $S11$. Floquet mode analysis is utilized to analyze the active impedance and the reflection coefficient. Good agreement is obtained betwe","authors_text":"Qiucui Li, Tian Lan, Xunya Jiang, Yushen Dou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-15T16:03:06Z","title":"A Study Of a Wide-Angle Scanning Phased Array Based On a High-Impedance Surface Ground Plane"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.04895","kind":"arxiv","version":1},"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":"sha256:4fe840cfe64db0d8d52eb0ffcfbc28d9e6c8593b42868427b2e57c33748d400b","target":"record","created_at":"2026-05-17T23:56:21Z","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":"e4190c25557a05f13f536f8959754a242c9e4623ce2328913709c77d534eac58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-15T16:03:06Z","title_canon_sha256":"842a7cd4356323625163149639acc8e63c6b7bb2a2d04ad5f643e32521c6021a"},"schema_version":"1.0","source":{"id":"1901.04895","kind":"arxiv","version":1}},"canonical_sha256":"ba044cd3bfc0720b728964582223affab0020b2984a67adce867aa5e891f887d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba044cd3bfc0720b728964582223affab0020b2984a67adce867aa5e891f887d","first_computed_at":"2026-05-17T23:56:21.384916Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:21.384916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a92SEP68ZrE4mOuy8XjIZFkFMHCduKLQNmtBUKZ9CO6HWq42peh+qk3eEXfNIYkEkMb1yy9J4oI1Pp71FRwhBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:21.385578Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.04895","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fe840cfe64db0d8d52eb0ffcfbc28d9e6c8593b42868427b2e57c33748d400b","sha256:bdb1eff9af24c1309d8db614b6f045f94f51bfd7882dad08a16511eec7d4123f"],"state_sha256":"ae8870e6787363c62867d644a5a38e23c2468bbb64bd4dde550cb0458ea254a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rdzx7qGs3e2lu5J3I2kVWqy9N7l/V7A1DFik7x7QuSMbaDgM7ZFUKJQqKAYmud8scJfCWMHiPv4pa71g07fFDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:13:52.691232Z","bundle_sha256":"4a44db1567d8ed04650430ca4c1ff556e4814573bfffa65d2357fad7416283d1"}}