Wideband Transversal Acoustic Wave Filters. Application to Connected Cars

Perea-Robles, Rafael; Mateu, Jordi; Collado, C.; Aigner, Robert

doi:10.23919/eumc48046.2021.9338238

Cited by 2 publications

(9 citation statements)

References 2 publications

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“…7. Blue-dashed line is used to indicate the characteristic polynomial response, showing very good agreement with the synthesized response, despite the different frequency dependence between the lowpass and bandpass prototype [13].…”

Section: Examplementioning

confidence: 64%

“…This creates additional differences between the lowpass synthesized response and the corresponding bandpass prototype. Again, only noticeable for wide band filters [13].…”

Section: From Lowpass To Bandpass Prototypementioning

confidence: 97%

“…This gives rise to slight differences between the synthesized lowpass and bandpass responses. This effect is more noticeable for wide band filters [13]. Possible limitation and solution to this discrepancy are discussed in section IV.D.…”

Section: From Lowpass To Bandpass Prototypementioning

confidence: 97%

“…9-The 𝐶 5 values are obtained from (15). 10-The 𝐶 𝑝 for each resonator are used to obtain the shunt inductance values ( 12) and (13).…”

Section: B Flexible Approachesmentioning

confidence: 99%

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Acoustic Wave Transversal Filter for 5G N77 Band

Mateu

Yusuf

Perea-Robles

et al. 2021

IEEE Trans. Microwave Theory Techn.

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This work presents the complete synthesis procedure and circuit transformations needed to go from the characteristic polynomials to the transversal network formed by electroacoustic resonators. This filter topology allows the possibility to achieve any filter response in spite of limited electroacoustic coupling. This is crucial for obtaining very wideband filters with arbitrary positions of transmission zeros. Additional circuit transformations reveal the flexibility of such topology to control other important parameters of the acoustic filter such as the impedance of the resonators and their resonant frequencies, which directly affect the manufacturing process.The transversal topology for electroacoustic filters has been verified by the synthesis, design, fabrication, and measurement of a very wideband filter to meet the requirements of 5G N77 frequency band, centered at 3.75 GHz with 910 MHz of bandwidth.

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Section: Examplementioning

confidence: 64%

“…This creates additional differences between the lowpass synthesized response and the corresponding bandpass prototype. Again, only noticeable for wide band filters [13].…”

Section: From Lowpass To Bandpass Prototypementioning

confidence: 97%

Section: From Lowpass To Bandpass Prototypementioning

confidence: 97%

“…9-The 𝐶 5 values are obtained from (15). 10-The 𝐶 𝑝 for each resonator are used to obtain the shunt inductance values ( 12) and (13).…”

Section: B Flexible Approachesmentioning

confidence: 99%

See 2 more Smart Citations

Acoustic Wave Transversal Filter for 5G N77 Band

Mateu

Yusuf

Perea-Robles

et al. 2021

IEEE Trans. Microwave Theory Techn.

Self Cite

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show abstract

“…The transversal topology of acoustic wave filters [5,[6][7][8][9] allows us to achieve any filter response without the detriment of the so-called electro-acoustic coupling, at the expense of requiring a differential port. Despite that, this topology has demonstrated to be one of the potential topologies for future demands.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and design of filters and multiplexers with acoustic transversal topology

Perea-Robles

Mateu

Collado

et al. 2021

Int. J. Microw. Wireless Technol.

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The novel acoustic transversal topology has demonstrated to be a potential candidate for the development of the next generation of communication filters. The major asset of this topology is its capacity to achieve any filter response without the detriment of limited electro-acoustic coupling. Additionally, this topology prompts for an easy connection of different filters to create multiband and multiplexing responses. This study recalls and further details on the design of multiplexers based on transversal topology using bulk acoustic wave (BAW) or surface acoustic wave (SAW) resonators. An important practical aspect of this topology is the need of a BALUN stage at one port of the filter. The use of the transversal topology is then applied to another type of acoustic resonator configuration, coupled resonator filter (CRF). Such a resonator configuration offers control over the phase of each transversal path, allowing us to eliminate the BALUN stage. CRF resonators are modeled by means of a different circuit model than BAW or SAW, which calls for a new synthesis procedure. This paper describes the synthesis approach and circuit transformation for the development of multiplexers based on the transversal arrangement of the CRF resonators. An example of a fully simulated 9-plexer is provided to verify this procedure.

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Wideband Transversal Acoustic Wave Filters. Application to Connected Cars

Cited by 2 publications

References 2 publications

Acoustic Wave Transversal Filter for 5G N77 Band

Acoustic Wave Transversal Filter for 5G N77 Band

Synthesis and design of filters and multiplexers with acoustic transversal topology

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