Theory and Design of the Monolithic Crystal Filter

Beaver, W.D.

doi:10.1109/freq.1967.199665

Cited by 26 publications

(9 citation statements)

References 2 publications

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“…The transfer matrix of the MCF prototype and immittance inverter in cascade will be The value of the characteristic impedance K depends upon the desired filter function. Consider the two Evaluating Y,(p) and its derivative at the transmission zero p = +j0.5851 and substituting in (8) and (9). the element values for the first MCF prototype section and immittance inverter are…”

Section: The Synthesis Proceduresmentioning

confidence: 99%

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Cascade Synthesis of Monolithic Crystal Filtfrs Possessing Finite Transmission Zeros

Dillon

Lind

1975

Circuit Theory & Apps

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Section: The Synthesis Proceduresmentioning

confidence: 99%

“…Evaluating Y,(p) and its derivative at the transmission zero p = +j0.5851 and substituting in (8) and (9). the element values for the first MCF prototype section and immittance inverter are L = 0.74315 X, = 0.68407 X , = -0.40771…”

Section: The Synthesis Proceduresmentioning

confidence: 99%

Cascade Synthesis of Monolithic Crystal Filtfrs Possessing Finite Transmission Zeros

Dillon

Lind

1975

Circuit Theory & Apps

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“…a subcategory of mechanically-coupled filters is a second-order monolithic filter realized by coupling two different resonance modes of a single structure together. This type of filter was first introduced by beaver for thicknessmode crystal devices [15], [16] and has been explored by others since then [17], [18]. The lateral-extensional monolithic filters have been formerly explored by the authors [19], [20].…”

Section: Introductionmentioning

confidence: 99%

Low-loss lateral-extensional piezoelectric filters on ultrananocrystalline diamond

Fatemi

Abdolvand

2013

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

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In this work, lateral-extensional thin-film piezoelectric- on-diamond (TPoD) filters with very low insertion loss (IL) values (<4 dB) are reported. Two different lateral-extensional modes of a resonant structure are coupled together to realize a two-pole filter. The filters of this work exhibit low IL values, with fractional bandwidth between 0.08% and 0.2%, and have a very small footprint. This paper reports on the lowest IL in the literature for lateral-extensional thin-film piezoelectric filters with 50 Ω terminations in the GSM frequency band (~900 MHz). The narrow-band filters of this work are fabricated on three ultrananocrystalline diamond substrates to achieve higher frequencies without excessive reduction in the feature size. The paper also thoroughly studies the parameters that affect the performance of such filters and then discussions are evaluated by the statistical data collected from the fabricated wafers.

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“…To address this issue, one can use an alternative approach by employing acoustically coupled filters. Stacked crystal filters [9] and monolithic crystal filters [10] are two examples of acoustically coupled filters. A similar coupling mechanism has been utilized in the design of piezoelectrically transduced MEMS filters [11]- [12].…”

Section: Introductionmentioning

confidence: 99%

Intrinsically switchable, BST-on-silicon composite FBARs

Sis

Lee

Mortazawi

2011

2011 IEEE MTT-S International Microwave Symposium

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This paper presents a DC voltage dependent switchable, composite thin film bulk acoustic wave (FBAR) resonator at 1.82 GHz. The resonator consists of barium stronium titanate-on-silicon in which barium stronium titanate (BST) is primarily used for transduction. The electrostrictive property of BST is exploited to turn the resonator on and off by applying a DC voltage. The device exhibits a quality factor of 157 and 301 at its series and parallel resonance frequencies, respectively. The preliminary result of an acoustically coupled thickness mode filter based on BST-on-Silicon structure is also presented. The insertion loss of the filter is 15 dB at 2.03 GHz. When the resonator is turned off (no DC bias), it behaves like a capacitor. This is the first demonstration of a BST-on-Silicon FBAR resonator.Index Terms -Barium stronium titanate, ferroelectric devices, FBAR resonators, acoustically coupled filters, intrinsically switchable devices, radio-frequency (RF) microelectromechanical systems (RF-MEMS)

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Theory and Design of the Monolithic Crystal Filter

Cited by 26 publications

References 2 publications

Cascade Synthesis of Monolithic Crystal Filtfrs Possessing Finite Transmission Zeros

Cascade Synthesis of Monolithic Crystal Filtfrs Possessing Finite Transmission Zeros

Low-loss lateral-extensional piezoelectric filters on ultrananocrystalline diamond

Intrinsically switchable, BST-on-silicon composite FBARs

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