{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:YS6T5JOVCTWIPDY54ISQXCCHM4","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":"10aa15c9640b3185f71bd6581ed7d62c819685b11c06641b01e3ee9452ef7dda","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-05-15T19:43:41Z","title_canon_sha256":"e61178f971a5c852d98c04d7660ccb00afff62d1f92bc768d0aa1c0f11b187c3"},"schema_version":"1.0","source":{"id":"2605.16586","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.16586","created_at":"2026-05-20T00:02:31Z"},{"alias_kind":"arxiv_version","alias_value":"2605.16586v1","created_at":"2026-05-20T00:02:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.16586","created_at":"2026-05-20T00:02:31Z"},{"alias_kind":"pith_short_12","alias_value":"YS6T5JOVCTWI","created_at":"2026-05-20T00:02:31Z"},{"alias_kind":"pith_short_16","alias_value":"YS6T5JOVCTWIPDY5","created_at":"2026-05-20T00:02:31Z"},{"alias_kind":"pith_short_8","alias_value":"YS6T5JOV","created_at":"2026-05-20T00:02:31Z"}],"graph_snapshots":[{"event_id":"sha256:d1701bc9fed8178997daea899e85e32212fe0ad31cead7b99009082bad2829f2","target":"graph","created_at":"2026-05-20T00:02:31Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"implementing a Bartlett window apodization technique, primarily intended for in-band spurious-mode suppression, yields a significantly improved quality factor (Q) of 1,522 from 688 in conventional interdigitated SH-SAW resonators."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The measured Q improvement is due to the apodization suppressing spurious modes rather than other unaccounted fabrication variations or measurement setup differences between the apodized and conventional devices."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Bartlett-apodized SH-SAW resonators in 42°Y-cut LiTaO3 on SiO2/Si reach Q of 1522 at 4.35 GHz, enabling a compact ladder filter with 1.59 dB loss and 3.24% FBW."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Bartlett apodization in SH-SAW resonators on thin-film LiTaO3 raises Q from 688 to 1522"}],"snapshot_sha256":"cb59586b4f010c99b5408a8393f9879f2114367ca5fe847cde89dbb7949be20e"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[{"findings_count":0,"name":"doi_title_agreement","ran_at":"2026-05-19T21:31:19.439289Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"doi_compliance","ran_at":"2026-05-19T21:21:31.278335Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"claim_evidence","ran_at":"2026-05-19T19:21:56.842193Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"ai_meta_artifact","ran_at":"2026-05-19T18:33:26.610223Z","status":"skipped","version":"1.0.0"}],"endpoint":"/pith/2605.16586/integrity.json","findings":[],"snapshot_sha256":"3c4b21bef9df5c3a5ebb419d0e86d88270d27c109971a208d51bcbce7ce44e32","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Shear-horizontal surface acoustic wave (SH-SAW) filters have shown strong potential for low-loss, compact, GHz-frequency RF front ends. In this work, we demonstrate a high-performance SH-SAW filter design at 4.35 GHz utilizing 42{\\deg}Y-cut thin-film lithium tantalate (LiTaO3) on a SiO2/Si platform. Despite the limitations of thin aluminum metallization and its associated ohmic losses, we show that implementing a Bartlett window apodization technique, primarily intended for in-band spurious-mode suppression, yields a significantly improved quality factor (Q) of 1,522 from 688 in conventional i","authors_text":"Ruochen Lu, Taran Anusorn, Tzu-Hsuan Hsu, Yuchen Ma","cross_cats":[],"headline":"Bartlett apodization in SH-SAW resonators on thin-film LiTaO3 raises Q from 688 to 1522","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-05-15T19:43:41Z","title":"Q-Enhanced SH-SAW Ladder Filter in Thin-Film Lithium Tantalate Using Bartlett Apodization"},"references":{"count":23,"internal_anchors":0,"resolved_work":23,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"Microwave acoustic devices: Recent advances and outlook,","work_id":"5feae41b-117d-4217-a3bb-9f6ed3704a5f","year":2021},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"From microwave acoustic filters to millimeter-wave operation and new applications,","work_id":"b25eecca-9ca9-4d95-96ab-d824a21e5f1f","year":2023},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"Scaling surface acoustic wave filters on LNOI platform for 5G communication,","work_id":"40f573be-4f1a-4f5d-9353-c5c336b66905","year":2022},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"Double busbar structure for transverse energy leakage and resonance suppression in surface acoustic wave resonators using 42° YX -lithium tantalate thin plate,","work_id":"f7a9f6c0-6bec-4c29-aea4-62cac215f961","year":2022},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"Surface-acoustic-wave devices based on lithium niobate and amorphous silicon thin films on a silicon substrate,","work_id":"9a857afb-6304-4daa-973c-7c9f36436ebc","year":2022}],"snapshot_sha256":"d47807cebeef0c5d748328bb0b63ff9ffc594ccff010c9c4f32cbd2452c780ae"},"source":{"id":"2605.16586","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-19T21:17:44.923540Z","id":"fe182645-09dd-43f9-8567-acae18347520","model_set":{"reader":"grok-4.3"},"one_line_summary":"Bartlett-apodized SH-SAW resonators in 42°Y-cut LiTaO3 on SiO2/Si reach Q of 1522 at 4.35 GHz, enabling a compact ladder filter with 1.59 dB loss and 3.24% FBW.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Bartlett apodization in SH-SAW resonators on thin-film LiTaO3 raises Q from 688 to 1522","strongest_claim":"implementing a Bartlett window apodization technique, primarily intended for in-band spurious-mode suppression, yields a significantly improved quality factor (Q) of 1,522 from 688 in conventional interdigitated SH-SAW resonators.","weakest_assumption":"The measured Q improvement is due to the apodization suppressing spurious modes rather than other unaccounted fabrication variations or measurement setup differences between the apodized and conventional devices."}},"verdict_id":"fe182645-09dd-43f9-8567-acae18347520"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:dd3bddf0bad54b364f35a13f6048611439092e997a9fe68d0c0668a89ce579c2","target":"record","created_at":"2026-05-20T00:02:31Z","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":"10aa15c9640b3185f71bd6581ed7d62c819685b11c06641b01e3ee9452ef7dda","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2026-05-15T19:43:41Z","title_canon_sha256":"e61178f971a5c852d98c04d7660ccb00afff62d1f92bc768d0aa1c0f11b187c3"},"schema_version":"1.0","source":{"id":"2605.16586","kind":"arxiv","version":1}},"canonical_sha256":"c4bd3ea5d514ec878f1de2250b884767277f468468f66112a057a93f39294fa0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4bd3ea5d514ec878f1de2250b884767277f468468f66112a057a93f39294fa0","first_computed_at":"2026-05-20T00:02:31.270581Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:02:31.270581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gjNfEMqdSRy+582/+wWrEqUCeJAKYGCzmJGQ3AzTjVpNTcwD2xachM1BETFDvqOdPeXwF1sDxjAPYPP99ZnsBQ==","signature_status":"signed_v1","signed_at":"2026-05-20T00:02:31.271462Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.16586","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd3bddf0bad54b364f35a13f6048611439092e997a9fe68d0c0668a89ce579c2","sha256:d1701bc9fed8178997daea899e85e32212fe0ad31cead7b99009082bad2829f2"],"state_sha256":"4e1fc33327110e6ccd35240ca4f958d7d143825468ba17453806ed5b3e5b55b5"}