PCS 1900 MHz duplexer using thin film bulk acoustic resonators (FBARs)

Ruby, R.; Bradley, P.; Larson, J.D.; Oshmyansky, Yury

doi:10.1049/el:19990559

Cited by 178 publications

(73 citation statements)

References 3 publications

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“…Therefore, the optimum arrangement is to have each 1kW magnetron drive three 4″ FBAR wafers, assuming as an illustrative example the rough estimates of costs given above. This excitation corresponds to ~56mW per FBAR, well within the power-handling capacity of this type of device (typically ~2W per FBAR is reported by Ruby et al (1999)). …”

Section: Estimate Of Performance Of Fbars As Hfgw Generatorssupporting

confidence: 74%

Gravitational Wave Generation and Detection Using Acoustic Resonators and Coupled Resonance Chambers

Woods

Baker²

2005

AIP Conference Proceedings

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Abstract. An experiment is described for the generation and detection of High-Frequency Gravitational Waves (HFGWs) in the laboratory utilizing acoustic piezoelectric resonators for generation, and coupled resonance chambers for detection. Film Bulk Acoustic Resonators or FBARs (similar to those utilized in commercial cellular telephones) energized by magnetrons (similar to those utilized in microwave ovens) are distributed in a ring-shaped array several hundred meters in diameter. The magnetrons are phase locked and are sufficient in number to energize millions of FBARs fabricated on thousands of wafers. The FBARs produce jerks (time rate of change of acceleration or a third time derivative motion imparted to their electrode masses) at a frequency of 2.45GHz. The resulting 4.9GHz HFGW is focused at the center of a segmented or asymmetrical ring of FBARs and is concentrated there by a high-temperature superconductor (HTSC) to generate a HFGW flux on the order of 17mW m -2 to 7W m -2 . A miniature version of an existing HFGW detector designed at INFN Genoa, Italy, consisting of a pair of coupled HTSC-surfaced resonance chambers (about one centimeter in diameter) will be situated in the middle, having their axes perpendicular to the plane of the ring of FBARs. Alternatively, a resonance-loop chamber detector, similar to that developed at Birmingham University, U.K., could be utilized. Details of the experiment and challenges to be met in its design as well as applications to space technology are discussed.

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Section: Estimate Of Performance Of Fbars As Hfgw Generatorssupporting

confidence: 74%

Gravitational Wave Generation and Detection Using Acoustic Resonators and Coupled Resonance Chambers

Woods

Baker²

2005

AIP Conference Proceedings

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“…AlN based BAW resonators have two basic architectures: Thin Film Bulk Acoustic Wave Resonator (FBAR), which is suspended above an air cavity, and Solidly Mounted Resonator (SMR), which utilizes a series of high and low impedance reflectors to isolate the resonator from the substrate. Thanks to their miniature sizes, high quality factors (Q) in air, and compatibilities with integrated circuit processing, BAW resonators have been used in a widespread applications, such as filters and duplexers in communication electronics [1,2], oscillators for frequency control, gravimetric sensors for physical [3], chemical [4] and biological [5,6] sensing, and general physics applications [7].…”

Section: Introductionmentioning

confidence: 99%

A Novel Bulk Acoustic Wave Resonator for Filters and Sensors Applications

et al. 2015

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Bulk acoustic wave (BAW) resonators are widely applied in filters and gravimetric sensors for physical or biochemical sensing. In this work, a new architecture of BAW resonator is demonstrated, which introduces a pair of reflection layers onto the top of a thin film bulk acoustic resonator (FBAR) device. The new device can be transformed between type I and type II dispersions by varying the thicknesses of the reflection layers. A computational modeling is developed to fully investigate the acoustic waves and the dispersion types of the device theoretically. The novel structure makes it feasible to fabricate both type resonators in one filter, which offers an effective alternative to improve the pass band flatness in the filter. Additionally, this new device exhibits a high quality factor (Q) in the liquid, which opens a possibility for real time measurement in solutions with a superior limitation of detection (LOD) in sensor applications.

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“…In Ref. [14] authors proposed that cavities with mechanical vibration in the GHz range may be obtained through a film bulk acoustic resonator (FBAR) [15,16] made of vibrating aluminium nitride film of thickness equal to half of the acoustic wavelength. For detection of photons generated in the cavity these authors proposed to use ultra-cold alkali atoms in their hyperfine states.…”

Section: Introductionmentioning

confidence: 99%

Influence of periodically modulated cavity field on the generation of atomic-squeezed states

Aggarwal

Bhattacherjee

Banerjee

et al. 2015

J. Phys. B: At. Mol. Opt. Phys.

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We investigate the influence of periodically time-modulated cavity frequency on the generation of atomic squeezed states for a collection of N two-level atoms confined in a non-stationary cavity with a moving mirror. We show that the two-photon character of the field generated from the vacuum state of field plays a significant role in producing the atomic or spin squeezed states. We further show that the maximum amount of persistent atomic squeezing is obtained for the initial cavity field prepared in the vacuum state.

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PCS 1900 MHz duplexer using thin film bulk acoustic resonators (FBARs)

Cited by 178 publications

References 3 publications

Gravitational Wave Generation and Detection Using Acoustic Resonators and Coupled Resonance Chambers

Gravitational Wave Generation and Detection Using Acoustic Resonators and Coupled Resonance Chambers

A Novel Bulk Acoustic Wave Resonator for Filters and Sensors Applications

Influence of periodically modulated cavity field on the generation of atomic-squeezed states

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