Synthesis and Realization of Chebyshev Filters Based on Constant Electromechanical Coupling Coefficient Acoustic Wave Resonators

Tseng, Shu-Yuan; Hsiao, Chin-Chung; Wu, Ruey-Beei

doi:10.1109/ims30576.2020.9224113

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…The circuit topology for a SAW extractor is shown in Figure 2 . The SAW resonator is represented by the mBVD model [ 18 ] in Figure 3 . WIFI port 2 is synthesized using a ladder-type structure that is shown in the upper channel in Figure 2 .…”

Section: Design Proceduresmentioning

confidence: 99%

“…If the result exceeds zero, the specification is not met, necessitating the cost function calculation. Use the pattern search method in MATLAB to iterate the calculation [ 18 ] until the result is satisfactorily close to zero, meaning it meets the specifications. The root-mean-squares-error (RMSE) is used for calculation.…”

Section: Design Proceduresmentioning

confidence: 99%

“…The desired mBVD parameters that meet the frequency response solution can be solved using a systematic optimization algorithm [ 22 ]. These are converted to various physical parameters for the SAW resonators [ 18 ]. The circuit topology is imported into Advanced Design System (ADS) to simulate the frequency response.…”

Section: Design Proceduresmentioning

confidence: 99%

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Design for SAW Antenna-Plexers with Improved Matching Inductance Circuits

Yang,

2023

Micromachines

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This study designs antenna-plexers, including a surface acoustic wave (SAW) extractor and an upper- and mid-high band (UHB + MHB) diplexer, for LTE 4G and 5G bands using carrier aggregation. The SAW extractor combines a bandpass filter (BPF) and a band-stop filter (BSF) in a single unit that consists of eight modified Butterworth–van Dyke (mBVD) resonators that resonate in parallel with an inductor and SAW resonators. This BSF behaves as a high-pass filter at frequencies lower than the designed WIFI band and as a capacitor at higher frequencies. The SAW extractor meets product specifications in the frequency range 0.7 to 2.7 GHz. The UHB + MHB diplexer, which is composed of a microwave filter, a SAW filter, and a simple matching inductor, uses frequency response methods to create an RF component for 2.4 GHz + WIFI 6E applications. The design uses a SAW’s interdigital transducer (IDT) structure, and the experimental results are in agreement with the simulation results, so the design is feasible.

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Section: Design Proceduresmentioning

confidence: 99%

Section: Design Proceduresmentioning

confidence: 99%

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Design for SAW Antenna-Plexers with Improved Matching Inductance Circuits

Yang,

2023

Micromachines

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“…Given the number of IDT pairs (Nt) and grating (Np), the pitch (p) and the aperture (W) are two physical parameters dominating the characteristics of the structure. Using the realization method introduced in our previous work [12], with Nt = 200 and Np = 20, p and W can be determined and are tabulated in Table 2 in the Appendix.…”

Section: A Experimental Layout and Setupmentioning

confidence: 99%

“…For AW filters, ladder-type and lattice-type topologies provide circuit architectures for the design of discrete AW resonators [10]. By moving the poles and zeros of the filter circuit in the s-domain to the target positions, two synthesis methods were introduced to optimize the frequency responses of the designed AW filters with the Chebyshev response [11][12]. Meanwhile, the realization method of the SAW resonator from the optimized circuit model was also introduced [12].…”

Section: Introductionmentioning

confidence: 99%

Design for Acoustic Wave Multiplexers With Single Inductor Matching Network Using Frequency Response Fitting Method

Tseng

Yang

Hsiao³

et al. 2022

IEEE Open J. Ultrason., Ferroelect., Freq. Contr.

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This study proposes a new acoustic wave (AW) multiplexer topology with a single-inductor matching network for carrier aggregation (CA) in the fifth-generation communication systems. To satisfy the desired specifications of all the multiplexer ports based on ladder-type filters, the frequency response fitting method (FRFM) is proposed to obtain the BVD parameters for each AW resonator. Using the proposed computer-aided method, a parameter solution can be obtained under practical design limitations, such as the selection of the piezoelectric material, properties of the manufacturing process, and used circuit topology. Furthermore, a measurement of a band 1 and 3 surface acoustic wave (SAW) multiplexer is set up to confirm the feasibility of the proposed FRFM. The designed SAW multiplexer based on the lithium tantalate with Euler angle (0, −38, 0), 42 ｏ YX-LiTaO3, is arranged. The designed quadplexer achieves high selectively with a return loss (RL), stopband reflection, and isolation better than −12 dB, −43 dB, and −50 dB, respectively, in a 2.15 × 2.65 mm 2 occupation. The measurement results confirm the feasibility of the multiplexer topology and the proposed FRFM. The approach is also extended to a quadplexer design with band 4 and 25 and a hexaplexer design with band 1, 3, and 7 for CA applications, demonstrating its flexibility and simplicity.INDEX TERMS acoustic wave components, filter synthesis, MEMS, microwave components, microwave filters, multiplexers, optimization methods, SAW devices.

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A Comprehensive Design Approach of Novel Acoustic Wave Networks Comprising Resonators Achieving Prescribed Coupling

Fathelbab

2021

IEEE Access

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Synthesis and Realization of Chebyshev Filters Based on Constant Electromechanical Coupling Coefficient Acoustic Wave Resonators

Cited by 6 publications

References 12 publications

Design for SAW Antenna-Plexers with Improved Matching Inductance Circuits

Design for SAW Antenna-Plexers with Improved Matching Inductance Circuits

Design for Acoustic Wave Multiplexers With Single Inductor Matching Network Using Frequency Response Fitting Method

A Comprehensive Design Approach of Novel Acoustic Wave Networks Comprising Resonators Achieving Prescribed Coupling

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