Methodology for designing microwave acoustic filters with Butterworth/Chebyshev response

Menendez, O.; Paco, Pedro de; Gemio, J.; Verdú, Jordi; Corrales, Eden

doi:10.1017/s1759078709000014

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…It could also present challenges in filter fabrication when each resonator has a distinct coupling coefficient. While the impedance inverter method [15] provides a theoretical design approach, it is limited by the band response of the negative capacitance.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Three Types of Design Methods for 5G N41 Band Acoustic Wave Filters

Jang,

Ahn

2024

International Journal of RF and Microwave Computer-Aided Engine

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This paper presents three design methods for acoustic wave (AW) filters: the direct conversion design method, the slope parameter method, and the band edge fitting method (BEFM). Since the conventional BVD model consists only of lumped elements and has accuracy only near the resonance frequency, an NM-BVD model capable of broadband modeling is proposed in this paper and used to design the filter. In the proposed BEFM, a systematically optimal filter method is used to design the AW filter, and each AW resonator is tuned to the filter prototype value to meet the desired specifications. Thus, the filter design time and the number of resonators can be efficiently improved, and the filter design time can be reduced compared with the direct conversion and slope parameter methods commonly used in filter design. To demonstrate the effectiveness of these design methods, the proposed methods were used to design and fabricate an N41 filter using scandium-doped aluminum nitride (ScAlN) resonators. The broadband capabilities of the filter were verified using BEFM. The design, fabrication, and measurement of a broadband filter that meets the requirements of the 5G N41 frequency band centered at 2.593 GHz with a bandwidth of 196 MHz have verified the filter fabricated using the proposed design method. The insertion loss is less than -3 dB in the target band and more than 30 dB out of band. In summary, the proposed BEFM provides an efficient and accurate method for designing AW filters.

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Section: Introductionmentioning

confidence: 99%

Analyzing Three Types of Design Methods for 5G N41 Band Acoustic Wave Filters

Jang,

Ahn

2024

International Journal of RF and Microwave Computer-Aided Engine

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“…Of the piezoelectric papers, Al Ahmad and Plana [1] describe the displacement detection of thin-film AlN using capacitance measurements while Menéndez et al [2] report a design methodology for microwave acoustic filters. The third paper, by Muralt et al [3], highlights the impact of material parameters for GHz applications; monolithic thin-film piezoelectric-on-substrate high-frequency filters are addressed by Abdolvand and Ayazi [4] in the fourth paper.…”

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confidence: 99%

Foreword

Ahmad¹

2009

Int. j. microw. wirel. technol.

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ForewordThe functionality of piezoelectric materials has become very useful in many integrated devices applications due to their electrical-mechanical reciprocity. Piezoelectric materials such as aluminum nitride (AlN) and lead zirconate oxide are widely employed. Therefore, it has become increasingly important to characterize the activity of piezoelectric materials relative to their applications and functionality. This special issue is dedicated to the piezoelectric materials characterization and microwave applications. The issue contains seven papers on the subject, in addition to four other papers.Of the piezoelectric papers, Al Ahmad and Plana [1] describe the displacement detection of thin-film AlN using capacitance measurements while Menéndez et al.[2] report a design methodology for microwave acoustic filters. The third paper, by Muralt et al. [3], highlights the impact of material parameters for GHz applications; monolithic thinfilm piezoelectric-on-substrate high-frequency filters are addressed by Abdolvand and Ayazi [4] in the fourth paper. The fifth paper (Ikehashi et al. [5]) outlines a lithographical bending control method for piezoelectric actuator fabrication for MEMS applications. The correlation of capacitive RF-MEMS reliability to AlN is discussed by Papandreou et al. [6] while Poplavko et al. [7] show the use of piezoelectric materials in building tunable microwave devices.

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