Visible to the public Synthesis and Realization of Chebyshev Filters Based on Constant Electromechanical Coupling Coefficient Acoustic Wave Resonators

TitleSynthesis and Realization of Chebyshev Filters Based on Constant Electromechanical Coupling Coefficient Acoustic Wave Resonators
Publication TypeConference Paper
Year of Publication2020
AuthorsTseng, S.-Y., Hsiao, C.-C., Wu, R.-B.
Conference Name2020 IEEE/MTT-S International Microwave Symposium (IMS)
Date Publishedaug
Keywordsacoustic coupling, acoustic wave, Band-pass filters, Chebyshev filters, constant electromechanical coupling coefficient acoustic wave resonators, Cost function, crystal filters, Global Positioning System, global positioning system frequency band, GPS, Human Behavior, LiTaO3, lithium compounds, lithium tantalate substrate, microwave communication, Microwave filters, optimisation, optimization algorithm, Optimization methods, piezoelectric substrate, pubcrawl, Resiliency, SAW filters, Scalability, surface acoustic wave filter, surface acoustic wave resonator filters, Surface acoustic waves
AbstractThis paper proposes a method to synthesis acoustic wave (AW) filters with Chebyshev response automatically. Meanwhile, each AW resonator used to design the filter can be easily fabricated on the same piezoelectric substrate. The method is based on an optimization algorithm with constraints for constant electromechanical coupling coefficient ( kt2) to minimize the defined cost function. Finally, the experimental result for a surface acoustic wave (SAW) filter of global positioning system (GPS) frequency band based on the 42° lithium tantalate (LiTaO3) substrate validates the simulation results. The designed filter shows insertion loss (IL) and return loss (RL) better than 2.5dB and 18dB respectively in the pass-band, and out-band reflection larger than 30dB.
DOI10.1109/IMS30576.2020.9224113
Citation Keytseng_synthesis_2020