{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ZSD6J33IWWISIDYAIGREI64KXF","short_pith_number":"pith:ZSD6J33I","canonical_record":{"source":{"id":"1504.00289","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-01T16:47:06Z","cross_cats_sorted":[],"title_canon_sha256":"a18be0826d839113b354e953664a44d829b69de3c3272fc43a79dece1ed39328","abstract_canon_sha256":"bcf9086bf81a9fd48d3f6a5abef26593e815e0318b150df33fedcc291cf51c41"},"schema_version":"1.0"},"canonical_sha256":"cc87e4ef68b591240f0041a2447b8ab94bdad18c5b79dad23f9d23dfc6570ac0","source":{"kind":"arxiv","id":"1504.00289","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00289","created_at":"2026-05-18T01:18:09Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00289v3","created_at":"2026-05-18T01:18:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00289","created_at":"2026-05-18T01:18:09Z"},{"alias_kind":"pith_short_12","alias_value":"ZSD6J33IWWIS","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZSD6J33IWWISIDYA","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZSD6J33I","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ZSD6J33IWWISIDYAIGREI64KXF","target":"record","payload":{"canonical_record":{"source":{"id":"1504.00289","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-01T16:47:06Z","cross_cats_sorted":[],"title_canon_sha256":"a18be0826d839113b354e953664a44d829b69de3c3272fc43a79dece1ed39328","abstract_canon_sha256":"bcf9086bf81a9fd48d3f6a5abef26593e815e0318b150df33fedcc291cf51c41"},"schema_version":"1.0"},"canonical_sha256":"cc87e4ef68b591240f0041a2447b8ab94bdad18c5b79dad23f9d23dfc6570ac0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:09.980826Z","signature_b64":"lxsY6gcWp1Bol7neGNW3fkc6ja6wVVszzB4nEO865Ck6/o59lanmSvH2p3ZctmKHdPsRIC1aqoEB8sGk8/N9Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc87e4ef68b591240f0041a2447b8ab94bdad18c5b79dad23f9d23dfc6570ac0","last_reissued_at":"2026-05-18T01:18:09.980308Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:09.980308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.00289","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:18:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RZ3RUPmVgzD0Q3XVk67tk0S6pqCX8MIXdKtTrHuJkyPewHHOSAUaIMiptakngvIv0YjPG/9rob0q8Kp/T5gLDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T14:52:19.825622Z"},"content_sha256":"253f511731547300c6413f6fb00607532a7fd8d008897f06e94f29f148b3cf74","schema_version":"1.0","event_id":"sha256:253f511731547300c6413f6fb00607532a7fd8d008897f06e94f29f148b3cf74"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ZSD6J33IWWISIDYAIGREI64KXF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Antenna Gain and Link Budget for Waves Carrying Orbital Angular Momentum (OAM)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alexandre Chabory, Baptiste Palacin, Duy Kevin Nguyen, J\\'er\\^ome Sokoloff, Nicolas Capet, Olivier Pascal","submitted_at":"2015-04-01T16:47:06Z","abstract_excerpt":"This paper addresses the RF link budget of a communication system using unusual waves carrying an orbital angular momentum (OAM) in order to clearly analyse the fundamental changes for telecommunication applications. The study is based on a typical configuration using circular array antennas to transmit and receive OAM waves. For any value of the OAM mode order, an original asymptotic formulation of the link budget is proposed in which equivalent antenna gains and free-space losses appear. The formulations are then validated with the results of a commercial electromagnetic simulation software."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00289","kind":"arxiv","version":3},"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":"2026-05-18T01:18:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sc4JmczD3waC4VCWCTZkyuKcNvJt42iRsAY3T/Pe/NDkZem5xGxmW2WSZORoQTbfXeisePhXLNY7u4R9hypLDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T14:52:19.825971Z"},"content_sha256":"2a2a26dd534838de2c1c3f945c8ce93e1eef31d608a6e0ea199a7a7ab120da67","schema_version":"1.0","event_id":"sha256:2a2a26dd534838de2c1c3f945c8ce93e1eef31d608a6e0ea199a7a7ab120da67"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZSD6J33IWWISIDYAIGREI64KXF/bundle.json","state_url":"https://pith.science/pith/ZSD6J33IWWISIDYAIGREI64KXF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZSD6J33IWWISIDYAIGREI64KXF/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":"2026-06-09T14:52:19Z","links":{"resolver":"https://pith.science/pith/ZSD6J33IWWISIDYAIGREI64KXF","bundle":"https://pith.science/pith/ZSD6J33IWWISIDYAIGREI64KXF/bundle.json","state":"https://pith.science/pith/ZSD6J33IWWISIDYAIGREI64KXF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZSD6J33IWWISIDYAIGREI64KXF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ZSD6J33IWWISIDYAIGREI64KXF","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":"bcf9086bf81a9fd48d3f6a5abef26593e815e0318b150df33fedcc291cf51c41","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-01T16:47:06Z","title_canon_sha256":"a18be0826d839113b354e953664a44d829b69de3c3272fc43a79dece1ed39328"},"schema_version":"1.0","source":{"id":"1504.00289","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00289","created_at":"2026-05-18T01:18:09Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00289v3","created_at":"2026-05-18T01:18:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00289","created_at":"2026-05-18T01:18:09Z"},{"alias_kind":"pith_short_12","alias_value":"ZSD6J33IWWIS","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZSD6J33IWWISIDYA","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZSD6J33I","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:2a2a26dd534838de2c1c3f945c8ce93e1eef31d608a6e0ea199a7a7ab120da67","target":"graph","created_at":"2026-05-18T01:18:09Z","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 addresses the RF link budget of a communication system using unusual waves carrying an orbital angular momentum (OAM) in order to clearly analyse the fundamental changes for telecommunication applications. The study is based on a typical configuration using circular array antennas to transmit and receive OAM waves. For any value of the OAM mode order, an original asymptotic formulation of the link budget is proposed in which equivalent antenna gains and free-space losses appear. The formulations are then validated with the results of a commercial electromagnetic simulation software.","authors_text":"Alexandre Chabory, Baptiste Palacin, Duy Kevin Nguyen, J\\'er\\^ome Sokoloff, Nicolas Capet, Olivier Pascal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-01T16:47:06Z","title":"Antenna Gain and Link Budget for Waves Carrying Orbital Angular Momentum (OAM)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00289","kind":"arxiv","version":3},"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":"sha256:253f511731547300c6413f6fb00607532a7fd8d008897f06e94f29f148b3cf74","target":"record","created_at":"2026-05-18T01:18:09Z","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":"bcf9086bf81a9fd48d3f6a5abef26593e815e0318b150df33fedcc291cf51c41","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-04-01T16:47:06Z","title_canon_sha256":"a18be0826d839113b354e953664a44d829b69de3c3272fc43a79dece1ed39328"},"schema_version":"1.0","source":{"id":"1504.00289","kind":"arxiv","version":3}},"canonical_sha256":"cc87e4ef68b591240f0041a2447b8ab94bdad18c5b79dad23f9d23dfc6570ac0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc87e4ef68b591240f0041a2447b8ab94bdad18c5b79dad23f9d23dfc6570ac0","first_computed_at":"2026-05-18T01:18:09.980308Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:09.980308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lxsY6gcWp1Bol7neGNW3fkc6ja6wVVszzB4nEO865Ck6/o59lanmSvH2p3ZctmKHdPsRIC1aqoEB8sGk8/N9Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:09.980826Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.00289","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:253f511731547300c6413f6fb00607532a7fd8d008897f06e94f29f148b3cf74","sha256:2a2a26dd534838de2c1c3f945c8ce93e1eef31d608a6e0ea199a7a7ab120da67"],"state_sha256":"ace737042409562e173f8a8d57fc91d0e7e615c921e945b129d7697fb9d9ad8d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BkCxApuUZkzlKxkaUn5xJallyUoc6jsHVwUX5QdmhvEPqxzli/hR7nwyor9P29GI3ks4ZiI+IAfF16nIPHb8AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T14:52:19.827979Z","bundle_sha256":"b3fabbbb398b24224129725c41ec14b685cca93eca0bb89fc92a526ab75bf1fd"}}