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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Yu-Bin Chen Yi-Hao Ma Da-Wei Wang Wen-Sheng Zhao MOE Key Lab of RF Circuits and Systems School of Electronics and Information Hangzhou Dianzi University Hangzhou China

This paper presents an absorptive common-mode stripline filter, which consists of two reflective common-mode filter (CMF) units and one absorptive CMF unit. For differential-mode (DM) signal, the filter is equivalent to an all-pass filter, while for common-mode (CM) signal, it exhibits band-stop characteristics. The filter can achieve more than 90% energy absorption for CM signal in the frequency range from 4.84 GHz to 6.11 GHz, while the DM signal could pass through from DC to 10.32 GHz.

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A Single-Notch Ultra-Wideband Bandpass Filter Based on Bow-Tie Cells

A Single-Notch Ultra-Wideband Bandpass Filter Based on Bow-T...

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IEEE International Workshop on Electromagnetics, Applications and Student Innovation (iWEM)

作者： Yu-Feng Xie Yi-Hao Ma Wen-Sheng Zhao MOE Key Lab of RF Circuits and Systems School of Electronics and Information Hangzhou Dianzi University Hangzhou China

This paper presents a highly efficient ultra-wideband (UWB) bandpass filter using coplanar waveguide (CPW) technology. The design employs bow-tie cells to achieve four transmission poles and one transmission zero. A step impedance resonator is introduced for further performance enhancement, and it contributes an additional transmission zero at low frequencies and optimizes the stopband. A T-shaped short-circuit stub is used to create a trap frequency band with deep attenuation, effectively blocking the ITU8.0 frequency band centered at 8.2 GHz. The proposed filter features a passband range from 3.7 GHz to 9.6 GHz, an insertion loss less than 0.8 dB, and a return loss greater than 20 dB. Additionally, the filter exhibits high selectivity, with a 30 dB skirt factor of 0.88 and a wide stopband up to 17.7 GHz, where S 21 is below −20 dB.

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Broadband Absorptive Common-Mode Filter Based on H-Shaped Defect Ground Structure

Broadband Absorptive Common-Mode Filter Based on H-Shaped De...

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IEEE International Workshop on Electromagnetics, Applications and Student Innovation (iWEM)

作者： Jun-Chen Lv Yi-Hao Ma Wen-Sheng Zhao MOE Key Lab of RF Circuits and Systems School of Electronics and Information Hangzhou Dianzi University Hangzhou China

A broadband absorptive common-mode (CM) filter based on an H-shaped defect ground structure (DGS) is proposed in this paper. The filter suppresses CM noise by periodically etching H-shaped defect structures with different sizes along the return path of the differential lines, while maintaining the integrity of the differential signal. It achieves a CM suppression over 20 dB within the frequency range of 1.83 GHz to 6.38 GHz. Further, the filter achieves absorption by embedding a resistor in the etched structure to dissipate reflected noise. By operating within the frequency ranges of 2.06 GHz to 3.14 GHz and 4.83 GHz to 6.88 GHz, the CM noise absorption efficiency can surpass 90%, effectively eradicating CM noise in the Wi-Fi frequency bands of 2.4 GHz and 5 GHz. The size of the filter is approximately 0.17λ g ×0.41λ g .

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Ultra High Temperature Saw Sensors Based on Signle Crystalline AlN and Multilayer Composite Electrode 16

Ultra High Temperature Saw Sensors Based on Signle Crystalli...

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16th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, SPAWDA 2022

作者： Zhang, Yihong Xuan, Weipeng Zhu, Daiqing Dong, Shurong Jin, Hao Luo, Jikui Zhejiang University Key Lab. of Adv. Micro/Nano Electron. Dev. and Smart Sys. of Zhejiang Coll. of Info. Sci. and Electron. Eng. Hangzhou China Hangzhou Dianzi University Ministry of Education Key Lab. of RF Circuits and Systems College of Electronics and Information Hangzhou China

ISBN: (纸本)9798350320800

A newly constructed surface acoustic wave (SAW) device was used to broaden the applicability of sensors at ultra-high temperatures (> 1000°C) and increase the stability under ultra-high temperatures. The choice of piezoelectric substrate and the design of temperature-resistant electrodes were both addressed in this design. We investigate the stability of AlN piezoelectric film for ultra-high-Temperature applications, based on the reliability of AlN/Sapphire structure in high-Temperature applications. In addition, a Pt-Rh and Al2O3 composite electrode structure was constructed and studied. Finally, a high temperature sensing resistant experiment based on single crystalline piezoelectric AlN was carried out, demonstrating that the developed SAW device can still work well at temperatures up to 1200°*** frequency response change of the SAW sensor under high temperatures was obtained and analyzed. © 2022 IEEE.

关键词： Aluminum nitride

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A compact broadband amplifier for 5G FR2 in 65nm CMOS

A compact broadband amplifier for 5G FR2 in 65nm CMOS

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Qingyan Wu Jincai Wen School of Electronics and Information Engineering Hangzhou Dianzi University Hangzhou China Key Lab. of RF Circuits and Systems Ministry of Education Hangzhou Dianzi University Hangzhou China

In this paper, a compact broadband amplifier is realized based on 65nm CMOS technology. The three differential CMOS pairs adopt the common source (CS) structure, rely on the capacitance neutralization technology and use the transformer for impedance transformation to achieve ultra-wideband matching. The simulation results show that in FR2 frequency band (24.26 - 52.6GHz), the output gain of the amplifier is 17±2.5dB, the DC power consumption is 45mW, the supply voltage is 1V, and the core circuit area is 0.11mm2.

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High Crystalline Quality A-Axis Oriented Al0.56Sc0.44N Films for High Coupling Saw Applications 22

High Crystalline Quality A-Axis Oriented Al0.56Sc0.44N Films...

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22nd International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2023

作者： Xuan, Weipeng Xie, Weilun Huang, Xiwei He, Xingli Cao, Zhen Jin, Hao Dong, Shurong Luo, Jikui Hangzhou Dianzi University Ministry Of Education Key Lab. Of Rf Circuits And Systems College Of Electron. & Info Hangzhou310018 China Soochow University School Of Electronic And Information Engineering Suzhou China Zhejiang University Key Lab. Of Adv. Micro/Nano Electron. Dev. & Smart Sys. Of Zhejiang College Of Info. Sci. & Electronic Eng Hangzhou310027 China Zhejiang University International Joint Innovation Center Haining314400 China

ISBN: (纸本)9784886864352

High crystalline quality Al0.56Sc0.44N ( 112¯0) (a-plane) films were prepared on Al2O3 ( {11¯02) substrates by magnetron reaction sputtering. X-ray diffraction (XRD) analysis indicates that the grown Al0.56Sc0.44N films are single-phased and a-plane oriented. The full width at half maximum (FWHM) of the rocking curve is only 0.4°, showing the high crystalline quality of the films. Effects of the normalized thickness hAlScN/λ on the acoustic wave propagation properties of the SAW resonator are evaluated by simulations. SAW resonators based on the sputtered non-polar (112¯0) Al0.56Sc0.44N films were prepared, which present a maximum electromechanical coupling coefficient ({keff2) of 5.7%. © 2023 IEEJ.

关键词： High Coupling coefficient Non-polar AlScN SAW

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A 24-29.5 GHz Compact Receiver Front End with Differential Image Rejection Filter in 65nm CMOS for 5G Application

A 24-29.5 GHz Compact Receiver Front End with Differential I...

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IEEE International Wireless Symposium (IWS)

作者： Jincai Wen Xu Wang Meng Yu Lingling Sun Key Lab. of Radio Frequency Circuits and Systems Ministry of Education Hangzhou Dianzi University Hangzhou China

A 24-29.5 GHz compact receiver front end in 65nm CMOS for 5G millimeter-wave application is presented in this paper. A compact differential image rejection filter structure is used to achieve effective image suppression and good impedance matching between LNA and mixer. The image rejection of the filter is realized by an out-of-band zero point generated by the double ring rectangular resonator. Designed and implemented in 65-nm CMOS technology with 1-V supply, the proposed receiver front end realizes that the conversion gain of 25 dB to 33.4 dB and the image signal suppression of 33.5 dB to 60.5 dB from 24 GHz to 29.5 GHz. The chip size is only 0.49 mm2 excluding all DC PADs.

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3D-STACKED MULTI-STAGE INERTIAL MICROFLUIDIC CHIP FOR HIGH-THROUGHPUT ENRICHMENT OF CIRCULATING TUMOR CELLS 26

3D-STACKED MULTI-STAGE INERTIAL MICROFLUIDIC CHIP FOR HIGH-T...

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26th International Conference on Miniaturized systems for Chemistry and Life Sciences, MicroTAS 2022

作者： Sun, Jingjing Huang, Xiwei Xu, Xuefeng Chen, Jin Wu, Guohua Wang, Shuqi Guo, Jinhong Sun, Lingling Ministry of Education Key Lab of RF Circuits and Systems Hangzhou Dianzi University China Institute of Translational Medicine Zhejiang University China School of Sensing Science and Engineering Shanghai Jiao Tong University China

ISBN: (纸本)9781733419048

A 3D-stacked multi-stage inertial microfluidic sorting chip for high-throughput enrichment of Circulating Tumor Cells (CTCs) and convenient downstream analysis is demonstrated. It uses a multi-stage structure to overcome the mutual constraints of throughput, separation efficiency, and purity, hence achieves high-throughput input and low flow rate output, enabling the separation of CTCs from massive background Red Blood Cells (RBCs) with the separation efficiency of >85%, separation purity of >90%, and the concentration fold of ~20. © 2022 MicroTAS 2022 - 26th International Conference on Miniaturized systems for Chemistry and Life Sciences. All rights reserved.

关键词： Microfluidic chips

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Portable ECG and PCG wireless acquisition system and multiscale CNN feature fusion Bi-LSTM network for coronary artery disease diagnosis

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Computers in Biology and Medicine 2025年 191卷 110202-110202页

作者： Lin, Junye Wang, Shaokui Xuan, Weipeng Chen, Ding Liu, Fuhai Chen, Jinkai Xia, Shudong Dong, Shurong Luo, Jikui Ministry of Education Key Lab. of RF Circuits and Systems College of Electronics & Information Hangzhou Dianzi University Hangzhou China Key Lab. of Adv. Micro/Nano Electron. Dev. & Smart Sys. of Zhejiang College of Info. Sci. & Electron. Eng. Zhejiang University Hangzhou China The Fourth Affiliated Hospital Zhejiang University School of Medicine Yiwu China

Coronary artery disease (CAD) is a major cause of mortality, especially among aging populations, making timely and accurate diagnosis essential. In this work, a portable wireless device powered by artificial intelligence for CAD detection is proposed, which synchronously captures electrocardiograms (ECG) and phonocardiograms (PCG) signals and transmits them for real-time analysis and visualization. To ensure the reliability of the acquired signals, a Hidden Semi Markov model is applied to validate data quality. Then, a multiscale convolutional neural network (CNN) feature fusion model extracts critical features from the PCG and ECG signals. All these features and signal information are later processed by a bidirectional long short-term memory (Bi-LSTM) network. Our network achieves impressive metrics and maintains reliable performance in practical tests. This straightforward diagnostic system offers a practical and technically feasible solution for the effective diagnosis of CAD, leveraging advanced neural network architectures for robust clinical application. © 2025 Elsevier Ltd

关键词： Convolutional neural networks

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A 20–55 GHz Broadband Low-Power Down-conversion Mixer Using 65-nm CMOS Technology

A 20–55 GHz Broadband Low-Power Down-conversion Mixer Using...

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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： Yuanji Dai Jincai Wen Ningbin Jin Key Lab. of Radio Frequency Circuits and Systems Ministry of Education Hangzhou Dianzi University Hangzhou China

ISBN: (纸本)9781665482271

This paper demonstrates a 20–55 GHz broadband low-power down-conversion mixer applies in 5G millimeter-wave (MMW) communication using 65-nm CMOS process. The structure of the mixer is a modified Gilbert-cell, which reduces the demand of supply voltage. By using weak inversion biasing, a low DC power consumption and low LO power can be achieved. At the IF output, A resistive-feedback inverter amplifier is used to improve the conversion gain. Marchand balun with compensation line is designed for broadband matching while converting the differential signal and single-ended signal. From 20 to 55 GHz, the proposed mixer achieves conversion gain of -0.37 to 2.41 dB at fixed 2 GHz IF frequency with a -3 dBm LO drive power. At 38 GHz the input 1-dB compression point is -11.3 dBm. The mixer consuming 7.48 mW from a 1.1V supply voltage. The chip size is 0.135 mm 2 in core and 0.25 mm 2 including all pads.

关键词： Power demand Broadband amplifiers 5G mobile communication Baluns Millimeter wave technology Voltage Inverters

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