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Author

Jingfu Bao

Bio: Jingfu Bao is an academic researcher from University of Electronic Science and Technology of China. The author has contributed to research in topics: Resonator & Insertion loss. The author has an hindex of 11, co-authored 97 publications receiving 600 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the feasibility of self-powered flexible micro-systems by introducing the technology of TENG around the following major categories: working principles, advanced materials, Teng-based active sensors, TENG-powered actuators, and integrated microsystems.

237 citations

Journal ArticleDOI
TL;DR: In this paper, a 140 GHz silicon micromachined bandpass rectangular waveguide filters are firstly fabricated by the deep reactive ion etching (DRIE) processes for submillimeter wave applications.
Abstract: The 140 GHz silicon micromachined bandpass rectangular waveguide filters are firstly fabricated by the deep reactive ion etching (DRIE) processes for submillimeter wave applications. The filter circuit structure is once-formed using the ICP reactive ion etcher to etch through the full thickness of the silicon wafer, and then bonded together with the two metallized glass covers to form the waveguide cavity. The measured lowest insertion losses are lower than 0.5 dB. The unloaded quality factor can reach 160. It demonstrates a successful and practical way to fabricate these types of waveguide filters.

52 citations

Journal ArticleDOI
TL;DR: A single-layer triboelectric nanogenerator (SL-TENG) based on ion-doped natural nanofibrils that enables TENGs to show greater potential for applications since the ultrasimple single- layer configuration enables it to be more easily integrated with other electronic components.
Abstract: As emerging ambient energy harvesting technology, triboelectric nanogenerators (TENGs) have proven to be a robust power source and have demonstrated the unique ability to power micro-nano electronics autonomously to form self-powered devices. Although four working modes of TENGs have been developed to promote the feasibility of self-powered micro-nano systems, the relatively complicated structure composed of multilayer and movable components limits the practical applications of TENGs. Herein, we propose a single-layer triboelectric nanogenerator (SL-TENG) based on ion-doped natural nanofibrils. Compared with the simplest mode of currently existing TENGs, i.e., the single-electrode type, this novel single-electrode TENG further simplifies the configuration by the removal of the dielectric layer. The underlying mechanism of the proposed SL-TENG is comprehensively investigated through electrical measurements and the analysis of the effect of ion species at different concentrations. In contrast to conventional TENGs that require electrodes to realize charge transfer, it is revealed that the ions doped into natural nanofibrils effectively realize charge transfer due to the separation and migration of cations and anions. This new working principle based on the combination of electrons and ions enables TENGs to show greater potential for applications since the ultrasimple single-layer configuration enables them to be more easily integrated with other electronic components; additionally, the whole device of the proposed SL-TENG is biodegradable because the natural nanofibrils are completely extracted from carrots.

32 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a new unidirectional-current triboelectric nanogenerator (UC-TENG) based on an innovative design of periodical lateral-cantilevers.

28 citations

Journal ArticleDOI
TL;DR: It is demonstrated that HCT enables rapid calculation for successive simulation with scanning design parameters, and it is shown that GPGPU can accelerate HCT calculation dramatically, especially for 3-D cases discussed in this article.
Abstract: This article describes the application of the hierarchical cascading technique (HCT) to the 3-D finite-element method (FEM) analysis of transverse-mode behaviors in surface acoustic-wave (SAW) devices. Mirror cascading is proposed as a speed-up technique for the HCT operation using the general-purpose graphic processing unit (GPGPU). Two methods are implemented for the analysis: one is impedance calculation and the other is the calculation of SAW scattering coefficients at boundaries. It is demonstrated that HCT enables rapid calculation for successive simulation with scanning design parameters. Thus, techniques discussed in this article are quite effective for the optimization of device structures. It is also shown that GPGPU can accelerate HCT calculation dramatically, especially for 3-D cases discussed in this article.

20 citations


Cited by
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Journal ArticleDOI
TL;DR: A bionic stretchable nanogenerator for underwater energy harvesting that mimics the structure of ion channels on the cytomembrane of electrocyte in an electric eel is reported, capable of harvesting energy and multi-position motion monitoring underwater.
Abstract: Soft wearable electronics for underwater applications are of interest, but depend on the development of a waterproof, long-term sustainable power source. In this work, we report a bionic stretchable nanogenerator for underwater energy harvesting that mimics the structure of ion channels on the cytomembrane of electrocyte in an electric eel. Combining the effects of triboelectrification caused by flowing liquid and principles of electrostatic induction, the bionic stretchable nanogenerator can harvest mechanical energy from human motion underwater and output an open-circuit voltage over 10 V. Underwater applications of a bionic stretchable nanogenerator have also been demonstrated, such as human body multi-position motion monitoring and an undersea rescue system. The advantages of excellent flexibility, stretchability, outstanding tensile fatigue resistance (over 50,000 times) and underwater performance make the bionic stretchable nanogenerator a promising sustainable power source for the soft wearable electronics used underwater.

373 citations

Journal ArticleDOI
TL;DR: In this article, a review of progress development of triboelectric nanogenerators and flexible electronics technology is firstly reviewed, and then various micro-/nano-systems enabled by the integration of TEN and FEN are presented to show the feasibility to achieve sustainable functional systems.

235 citations

Journal ArticleDOI
TL;DR: In this article, the current state-of-the-art developments are discussed of flexible sensors made of 1D fibrous, 2D planar and 3D cellular interconnected graphene architectures for detecting physiological strains, tactile pressures and temperatures.

215 citations

Book ChapterDOI
01 Jan 2003
TL;DR: In this paper, an expanded and thoroughly revised edition of Thomas H. Lee's acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems.
Abstract: This expanded and thoroughly revised edition of Thomas H. Lee's acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems. The chapters on low-noise amplifiers, oscillators and phase noise have been significantly expanded as well. The chapter on architectures now contains several examples of complete chip designs that bring together all the various theoretical and practical elements involved in producing a prototype chip. First Edition Hb (1998): 0-521-63061-4 First Edition Pb (1998); 0-521-63922-0

207 citations

Journal ArticleDOI
TL;DR: In this article, a self-powered e-skin based on a triboelectric nanogenerator (TENG) was developed to imitate the human skin and achieve multifunctions of sensing including pressure, position, strain, sliding and so on.

188 citations