Large bandwidth low-spurious SAW filter for N78 band
With the rapid development of 5G technology, key components like Surface Acoustic Wave Filters (SAWF) face challenges in bandwidth, spurious, and leakage. This paper optimizes the materials, thickness, and metallization ratio (MR) of IDT to propose a high-frequency, low-spurious, wide-bandwidth filter for the N78 band. Firstly, simulations show Au outperforms Al and Cu in reducing spurious and leakage. Secondly, by analyzing impact of MR, the optimal MR for series and parallel resonant units is 0.4 and 0.6, respectively. Eventually, A filter with 642 MHz bandwidth, 3.52 GHz center frequency, and 1.22 dB in-band spurious was obtained for N78 band.
Authors
- Fang Wang (ORCID: https://orcid.org/0000-0001-9262-5750)
- Lintao Zhou (ORCID: https://orcid.org/0000-0001-5700-9602)
- Kailiang Zhang (ORCID: https://orcid.org/0000-0001-5593-7480)
- Wenwen Deng (ORCID: https://orcid.org/0000-0001-8329-8698)
- Yingying Li
- Dun Hongyu
Institutions
- Tianjin University of Technology (CN)
- Nankai University (CN)
Publication Details
- Journal
- IEICE Electronics Express
- Published
- 2025-08-11
- DOI
- https://doi.org/10.1587/elex.22.20250276
- Primary Topic
- Acoustic Wave Resonator Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Tianjin City
- National Key Research and Development Program of China