Improved Accuracy for Determining SAW Transducer Capacitance and K&lt;sup&gt;2&lt;/sup&gt;

Aartmann, C.S.; Jen, Shen; Domalewski, M.A.; Andle, J.C.

doi:10.1109/ultsym.1987.198946

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…The maximum FBW is directly related to k 2 of the intended mode and the effective coupling efficiency of the transducer in the chosen platform. The limitation can be presented as [28], [49]…”

Section: B Broadband Sh0 Acoustic Delay Lines At Ghzmentioning

confidence: 99%

GHz Broadband SH0 Mode Lithium Niobate Acoustic Delay Lines

Yang

et al. 2020

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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We present the first group of GHz broadband SH0 mode acoustic delay lines (ADLs). The implemented ADLs adopt unidirectional transducer designs in a suspended X-cut lithium niobate thin film. The design space of the SH0 mode ADLs at GHz is first theoretically investigated, showing that the large coupling and sufficient spectral clearance to adjacent modes collectively enable the broadband performance of SH0 delay lines. The fabricated devices show 3-dB fractional bandwidth ranging from 4% to 34.3% insertion loss between 3.4 and 11.3 dB. Multiple delay lines have been demonstrated with center frequencies from 0.7 to 1.2 GHz, showing great frequency scalability. The propagation characteristics of SH0 in lithium niobate thin film are experimentally extracted. The demonstrated ADLs can potentially facilitate broadband signal processing applications.

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Section: B Broadband Sh0 Acoustic Delay Lines At Ghzmentioning

confidence: 99%

GHz Broadband SH0 Mode Lithium Niobate Acoustic Delay Lines

Yang

et al. 2020

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Thus, we will just briefly revisit this topic. The piezoelectric limitation sets the maximum 3-dB FBW for a device without significantly trading off IL, which is directly related to k 2 of an acoustic mode and the transducer design, presented as [45], [66]…”

Section: Design Of S0 Adl Testbedmentioning

confidence: 99%

“…c piezo is the material piezoelectric constant determined by the material electromechanical coupling coefficient. For S0 with a wavelength of 6.2 μm, Q T is 0.659 [66], and k 2 is 40.4%. The maximum FBW without introducing additional IL is 55%.…”

Section: Design Of S0 Adl Testbedmentioning

confidence: 99%

GHz Low-Loss Acoustic RF Couplers in Lithium Niobate Thin Film

Yang

et al. 2020

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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We present the first group of GHz low-loss acoustic radio frequency (RF) couplers using the fundamental symmetric (S0) mode in X-cut lithium niobate thin films. The demonstrated multistrip couplers (MSCs) significantly surpass the insertion loss (IL) and the operating frequency of the previous works in more compact structures, thanks to the large electromechanical coupling and low loss of S0 in lithium niobate. The design space of S0 MSCs is first explored. Devices with different coupling factors are fabricated using different numbers of strips. Based on the S0 testbed with an IL of 4.5 dB at 1 GHz, the hybrid coupler shows an IL of 7.5 dB, while the track changer shows an IL of 5.1 dB, over a 3-dB fractional bandwidth of 8%. Couplers at different frequencies (between 0.75 and 1.55 GHz) are also investigated. Upon further optimizations, the S0 MSC platform can potentially enable low-loss wideband signal processing functions toward an RF acoustic component kit.

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Fundamental analysis of surface acoustic wave propagation

Langer

1991

International Journal of Engineering Science

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Improved Accuracy for Determining SAW Transducer Capacitance and K<sup>2</sup>

Cited by 11 publications

References 14 publications

GHz Broadband SH0 Mode Lithium Niobate Acoustic Delay Lines

GHz Broadband SH0 Mode Lithium Niobate Acoustic Delay Lines

GHz Low-Loss Acoustic RF Couplers in Lithium Niobate Thin Film

Fundamental analysis of surface acoustic wave propagation

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