Flexible Film Bulk Acoustic Wave Filters toward Radiofrequency Wireless Communication

Jiang, Yuan; Yuan, Zhao; Zhang, Lin; Liu, Bohua; Li, Quanning; Zhang, Menglun

doi:10.1002/smll.201703644

Cited by 34 publications

(36 citation statements)

References 19 publications

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“…As seen in Table 1, the minimum insertion loss of the bandpass filter deteriorated by 0.01, 0.02, 0.02, and 0.02 dB separately after the bending, folding, rolling, and tape-exfoliation tests. The errors were mainly caused by the influence of testing environments and fabrication tolerance [20,21]. The frequency shift and the insertion loss degradation of the designed filters were negligible.…”

Section: Characteristicsmentioning

confidence: 99%

“…It can be seen that no crack or contamination occurred during the reduction process. The designed bandpass filter has a great potential to be integrated with other flexible electronic components [20]. This technique does not rely on costly equipment, and the adhesion of passive metals to the polymers is better.…”

Section: Fabrication Of the Filtermentioning

confidence: 99%

Section: Characteristicsmentioning

confidence: 99%

“…The measured results are basically consistent with the simulation and meet the design requirements. The errors between simulated and measured results are mainly caused by the influence of the testing environment and the fabrication tolerance [20,21]. To investigate the mechanical flexibility of the flexible bandpass filter, the performance of the filter was tested under different conditions such as bending, folding, and rolling.…”

Section: Characteristicsmentioning

confidence: 99%

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Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Wang

Cang

2019

Polymers

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Polymer, especially polyimide (PI), is the best suitable substrate material for the design of flexible electronics. The compact silver can be reduced on the surface of PI films by surface modification and in situ self-metallization technique. The formed silver layers have good electrical and mechanical flexibility. A flexible bandpass filter on a PI flexible substrate by surface modification and in situ self-metallization technique at room temperature are presented in this work. Measured results show that the proposed flexible bandpass filter could achieve a fractional bandwidth of 80.8% with an insertion loss (IL) of less than 0.6 dB. The performance of the designed filter is almost constant under different bending, folding, and rolling conditions. The formed silver layers also present good adhesion with PI substrates. This technology provides an alternative approach for manufacturing flexible filters without high-temperature thermal annealing, costly equipment, and vacuum conditions.

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Section: Characteristicsmentioning

confidence: 99%

Section: Fabrication Of the Filtermentioning

confidence: 99%

Section: Characteristicsmentioning

confidence: 99%

Section: Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Wang

Cang

2019

Polymers

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Section: Flexible Microwave Transistors Based On Conventional Semiconmentioning

confidence: 99%

Flexible and Stretchable Microwave Electronics: Past, Present, and Future Perspective

Zhang

Lan

Qiu

et al. 2020

Adv Materials Technologies

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2000759 (6 of 38) www.advmattechnol.de Figure 4. Flexible microwave transistors. a) Schematic illustration of fabrication process flow of flexible microwave TFTs based on Si nanomembrane. Left, two-step transfer-printing of Si nanomembrane on flexible substrate with assist of PDMS stamp. Right, direct flip-printing Si nanomembrane on flexible substrate. Reproduced with permission. [72] Copyright 2010, Wiley-VCH. b) Flexible microwave Si TFT using direct flip-printing approach in (a). Reproduced under the terms of the Creative Commons Attribution 4.0 International License. [75] Copyright 2016, Springer Nature. c) Flexible microwave Si TFT using two-step approach in (a). Reproduced with permission. [72] Copyright 2010, Wiley-VCH. d) Cross-section SEM image of flexible Si MOSFET made by thinning a 65 nm node SOI wafer. Reproduced with permission. [45] Copyright 2013, American Institute of Physics. e) Optical images of flexible GaAs HBT on cellulose nanofibril (CNF) substrate. Reproduced under the terms of the Creative Commons Attribution 4.0 International License. [90] Copyright 2015, Springer Nature. f) Schematic illustration and normalized on-state conductance (G/G 0), maximum transconductance (g m /g m0) of flexible InAs MOSFET with self-aligned gate. Reproduced with permission. [53] Copyright 2012, American Chemical Society. g) Cross-section schematic illustration and gain curves of flexible InGaAs/InAlAs HEMT as function of frequency under various bending conditions. Reproduced with permission. [91] Copyright 2013, American Institute of Physics. h) Output power density (P OUT), power gain (G P) and power-added efficiency (PAE) of the flexible GaN HEMT on thermal conductive tape with thermal conductivity of 1.6 W m −1 K −1. Reproduced with permission. [92] Copyright 2017, Wiley-VCH. i) Photography of AlGaN/GaN film grown on BN coated sapphire substrate and printed on flexible tape. Reproduced with permission. [19] Copyright 2017, Wiley-VCH. j) Cross-section schematic illustration of bottom gate flexible graphene FET (GFET). Reproduced with permission. [93] Copyright 2013, American Chemical Society. k) Cross-section schematic illustration of top gate flexible GFET with self-aligned gate configuration. Reproduced with permission. [94] Copyright 2014, American Chemical Society. l) High-frequency characteristics of flexible GFET with gate length of 50 nm. Reproduced with permission. [95] Copyright 2018, Wiley-VCH. m) Schematic illustration and gain curves of flexible microwave transistor based on MoS 2 as function of frequency. Reproduced with permission. [96] Copyright 2014, Springer Nature. n) High-frequency characteristics of flexible microwave transistor based on black phosphorus (BP) as function of frequency. Reproduced with permission.

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Multifunctional and Wearable Patches Based on Flexible Piezoelectric Acoustics for Integrated Sensing, Localization, and Underwater Communication

Zhang

Wang

et al. 2022

Adv Funct Materials

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Flexible and wearable sensors are highly desired for health monitoring, agriculture, sport, and indoor positioning systems applications. However, the currently developed wireless wearable sensors, which are communicated through radio signals, can only provide limited positioning accuracy and are often ineffective in underwater conditions. In this paper, a wireless platform based on flexible piezoelectric acoustics is developed with multiple functions of sensing, communication, and positioning. Under a high frequency (≈13 MHz) stimulation, Lamb waves are generated for respiratory monitoring. Whereas under low-frequency stimulation (≈20 kHz), this device is agitated as a vibrating membrane, which can be implemented for communication and positioning applications. Indoor communication is demonstrated within 2.8 m at 200 bps or 4.2 m at 25 bps. In combination with the sensing function, real-time respiratory monitoring and wireless communication are achieved simultaneously. The distance measurement is achieved based on the phase differences of transmitted and received acoustic signals within a range of 100 cm, with a maximum error of 3 cm. This study offers new insights into the communication and positioning applications using flexible acoustic wave devices, which are promising for wireless and wearable sensor networks.

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Flexible Film Bulk Acoustic Wave Filters toward Radiofrequency Wireless Communication

Cited by 34 publications

References 19 publications

Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Flexible and Stretchable Microwave Electronics: Past, Present, and Future Perspective

Multifunctional and Wearable Patches Based on Flexible Piezoelectric Acoustics for Integrated Sensing, Localization, and Underwater Communication

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