{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:SYFFIAUO5HWNVDMTJKNL2NNOU7","short_pith_number":"pith:SYFFIAUO","canonical_record":{"source":{"id":"2501.02536","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2025-01-05T13:39:25Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"c7542c86da2b7f1726a1b8d96e8bde8f56b94e45a5c8876cfa8c55b173552a8c","abstract_canon_sha256":"5842399242e1701b0f874c368a5c2637dfbed91a990a51f5cfb9a5f701d48d53"},"schema_version":"1.0"},"canonical_sha256":"960a54028ee9ecda8d934a9abd35aea7e6484272e2433d32e8e72776641eea51","source":{"kind":"arxiv","id":"2501.02536","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.02536","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"arxiv_version","alias_value":"2501.02536v1","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.02536","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"pith_short_12","alias_value":"SYFFIAUO5HWN","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"pith_short_16","alias_value":"SYFFIAUO5HWNVDMT","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"pith_short_8","alias_value":"SYFFIAUO","created_at":"2026-07-05T09:57:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:SYFFIAUO5HWNVDMTJKNL2NNOU7","target":"record","payload":{"canonical_record":{"source":{"id":"2501.02536","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2025-01-05T13:39:25Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"c7542c86da2b7f1726a1b8d96e8bde8f56b94e45a5c8876cfa8c55b173552a8c","abstract_canon_sha256":"5842399242e1701b0f874c368a5c2637dfbed91a990a51f5cfb9a5f701d48d53"},"schema_version":"1.0"},"canonical_sha256":"960a54028ee9ecda8d934a9abd35aea7e6484272e2433d32e8e72776641eea51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:57:08.765293Z","signature_b64":"CjGBCS53OlN5Z2rqo3NB1arhrmseDbNVz9AHXTZ1wecmIx21YxxngDgVhANuqmnq/E+3aeyrm659Ku3B9UFvDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"960a54028ee9ecda8d934a9abd35aea7e6484272e2433d32e8e72776641eea51","last_reissued_at":"2026-07-05T09:57:08.764763Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:57:08.764763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.02536","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":"2026-07-05T09:57:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EPoIYxveG7RkAuH8OufjOzEnI4Ig/wwChKQMMxJZ6xOMnxR6gm/C2gyxMlV9jtieS9tOJPHdM4dmU0tJ4Ua7Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:19:30.815626Z"},"content_sha256":"56e65ed4becf4103d063e9fbcca31c544c2eb51957d88b8c1ca04fe05cbefb89","schema_version":"1.0","event_id":"sha256:56e65ed4becf4103d063e9fbcca31c544c2eb51957d88b8c1ca04fe05cbefb89"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:SYFFIAUO5HWNVDMTJKNL2NNOU7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low RCS High-Gain Broadband Substrate Integrated Waveguide Antenna Based on Elliptical Polarization Conversion Metasurface","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Cuiqin Zhao, Dongya Shen, Huihui Xiao, Longxiang Luo, Yanming Duan, Yuting Wang","submitted_at":"2025-01-05T13:39:25Z","abstract_excerpt":"Designed an elliptical polarization conversion metasurface (PCM) for Ka-band applications, alongside a high-gain substrate integrated waveguide (SIW) antenna. The PCM elements are integrated into the antenna design in a chessboard array configuration, with the goal of achieving effective reduction in the antenna's radar cross section (RCS). Both the PCM elements and antenna structure exhibit a simple design. The top layer of the metasurface (MS) elements employs an elliptical pattern symmetric along the diagonal, enabling efficient conversion of linearly polarized waves. The antenna component,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.02536","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.02536/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T09:57:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"weg7SW5wSQgRecQLuuZPhjBG79JmlELPoGVXszYSj7/hRlOo+znpo6iFju+mqnZbPpyNHCEHl3EcOw7uep1ZDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:19:30.816246Z"},"content_sha256":"20e2a5c496559ea6a037cd77f83557cd96ddec4dee8841284a5f166b638a13b5","schema_version":"1.0","event_id":"sha256:20e2a5c496559ea6a037cd77f83557cd96ddec4dee8841284a5f166b638a13b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7/bundle.json","state_url":"https://pith.science/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7/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":"2026-08-12T04:19:30Z","links":{"resolver":"https://pith.science/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7","bundle":"https://pith.science/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7/bundle.json","state":"https://pith.science/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SYFFIAUO5HWNVDMTJKNL2NNOU7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:SYFFIAUO5HWNVDMTJKNL2NNOU7","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":"5842399242e1701b0f874c368a5c2637dfbed91a990a51f5cfb9a5f701d48d53","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2025-01-05T13:39:25Z","title_canon_sha256":"c7542c86da2b7f1726a1b8d96e8bde8f56b94e45a5c8876cfa8c55b173552a8c"},"schema_version":"1.0","source":{"id":"2501.02536","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.02536","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"arxiv_version","alias_value":"2501.02536v1","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.02536","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"pith_short_12","alias_value":"SYFFIAUO5HWN","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"pith_short_16","alias_value":"SYFFIAUO5HWNVDMT","created_at":"2026-07-05T09:57:08Z"},{"alias_kind":"pith_short_8","alias_value":"SYFFIAUO","created_at":"2026-07-05T09:57:08Z"}],"graph_snapshots":[{"event_id":"sha256:20e2a5c496559ea6a037cd77f83557cd96ddec4dee8841284a5f166b638a13b5","target":"graph","created_at":"2026-07-05T09:57:08Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2501.02536/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Designed an elliptical polarization conversion metasurface (PCM) for Ka-band applications, alongside a high-gain substrate integrated waveguide (SIW) antenna. The PCM elements are integrated into the antenna design in a chessboard array configuration, with the goal of achieving effective reduction in the antenna's radar cross section (RCS). Both the PCM elements and antenna structure exhibit a simple design. The top layer of the metasurface (MS) elements employs an elliptical pattern symmetric along the diagonal, enabling efficient conversion of linearly polarized waves. The antenna component,","authors_text":"Cuiqin Zhao, Dongya Shen, Huihui Xiao, Longxiang Luo, Yanming Duan, Yuting Wang","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2025-01-05T13:39:25Z","title":"Low RCS High-Gain Broadband Substrate Integrated Waveguide Antenna Based on Elliptical Polarization Conversion Metasurface"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.02536","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":"sha256:56e65ed4becf4103d063e9fbcca31c544c2eb51957d88b8c1ca04fe05cbefb89","target":"record","created_at":"2026-07-05T09:57:08Z","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":"5842399242e1701b0f874c368a5c2637dfbed91a990a51f5cfb9a5f701d48d53","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2025-01-05T13:39:25Z","title_canon_sha256":"c7542c86da2b7f1726a1b8d96e8bde8f56b94e45a5c8876cfa8c55b173552a8c"},"schema_version":"1.0","source":{"id":"2501.02536","kind":"arxiv","version":1}},"canonical_sha256":"960a54028ee9ecda8d934a9abd35aea7e6484272e2433d32e8e72776641eea51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"960a54028ee9ecda8d934a9abd35aea7e6484272e2433d32e8e72776641eea51","first_computed_at":"2026-07-05T09:57:08.764763Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:57:08.764763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CjGBCS53OlN5Z2rqo3NB1arhrmseDbNVz9AHXTZ1wecmIx21YxxngDgVhANuqmnq/E+3aeyrm659Ku3B9UFvDg==","signature_status":"signed_v1","signed_at":"2026-07-05T09:57:08.765293Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.02536","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:56e65ed4becf4103d063e9fbcca31c544c2eb51957d88b8c1ca04fe05cbefb89","sha256:20e2a5c496559ea6a037cd77f83557cd96ddec4dee8841284a5f166b638a13b5"],"state_sha256":"ecc165ed35bce7d0ec67b30b99203d0a387f4e38d2950086404b23f8516b50a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xU53PJDKgXRWjMjUYc0lRqCu0RXlu+Dn5WbOL2fuxMG4sTart1EmXa6+W2qxLFJTlYoQhOSSRgJl49g5cY6wBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T04:19:30.821286Z","bundle_sha256":"1875d2a25253a7d53661a87396729265ed0fbbba4dad35ad319143f858797e17"}}