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A High Temperature–Voltage Sensitivity 2-Transistor Voltage Reference With Wide Range Operation 一种工作范围宽的高温电压敏感双晶体管电压基准
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-23 DOI: 10.1049/ell2.70544
Myung-Hyun Jeon, Yeonsu Kim, Hyunyoung Yoo, Eunji Yoo, Jusung Kim, Min-Woo Kwon, Jae-Won Nam
{"title":"A High Temperature–Voltage Sensitivity 2-Transistor Voltage Reference With Wide Range Operation","authors":"Myung-Hyun Jeon,&nbsp;Yeonsu Kim,&nbsp;Hyunyoung Yoo,&nbsp;Eunji Yoo,&nbsp;Jusung Kim,&nbsp;Min-Woo Kwon,&nbsp;Jae-Won Nam","doi":"10.1049/ell2.70544","DOIUrl":"https://doi.org/10.1049/ell2.70544","url":null,"abstract":"<p>Measurement of the temperature in an integrated circuit (IC) is essential for evaluating temperature-dependent circuit performance. Using off-chip temperature sensors for this purpose has limited accuracy in sensing the on-chip temperature. For on-chip integration with ICs, a low-power and compact temperature sensor is required. Therefore, this letter presents a 2-Transistor (2T) voltage reference generator (VRG) that overcomes the limited sensitivity of conventional structures through the deep-subthreshold operation and achieves high <span></span><math>\u0000 <semantics>\u0000 <mi>T</mi>\u0000 <annotation>$T$</annotation>\u0000 </semantics></math>–<span></span><math>\u0000 <semantics>\u0000 <mi>V</mi>\u0000 <annotation>$V$</annotation>\u0000 </semantics></math> sensitivity by employing the narrow-width effect. The proposed 2T VRGs are implemented in 28-nm FD-SOI process and demonstrated to operate over a temperature range of 200 to 400 K, achieving a 0.86 mV/K <span></span><math>\u0000 <semantics>\u0000 <mi>T</mi>\u0000 <annotation>$T$</annotation>\u0000 </semantics></math>–<span></span><math>\u0000 <semantics>\u0000 <mi>V</mi>\u0000 <annotation>$V$</annotation>\u0000 </semantics></math> sensitivity with 3.6% relative inaccuracy.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70544","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147299945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Novel Higher Order Local Time-Stepping Technique for the DGTD–FDTD Method DGTD-FDTD法中一种新的高阶局部时间步进技术
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-22 DOI: 10.1049/ell2.70542
Qingkai Wu, Kunyi Wang, Sheng Zuo, Zhongchao Lin, Yu Zhang, Xunwang Zhao
{"title":"A Novel Higher Order Local Time-Stepping Technique for the DGTD–FDTD Method","authors":"Qingkai Wu,&nbsp;Kunyi Wang,&nbsp;Sheng Zuo,&nbsp;Zhongchao Lin,&nbsp;Yu Zhang,&nbsp;Xunwang Zhao","doi":"10.1049/ell2.70542","DOIUrl":"https://doi.org/10.1049/ell2.70542","url":null,"abstract":"<p>A novel higher order local time-stepping (LTS) technique for the discontinuous Galerkin time-domain–finite difference time-domain (DGTD–FDTD) method is proposed to accelerate transient electromagnetic simulations. The higher order equation is applied to the boundary elements or grids between LTS classes to reduce approximation error caused by the LTS. The proposed higher order LTS is incorporated in DGTD–FDTD to avoid the global decrease of the minimum time step and thus boost simulation efficiency, which has not been studied before. Through one numerical example, the accuracy and efficiency of the presented method are demonstrated, showing its ability to model practical multiscale targets.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70542","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147323862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Compact Acoustic Signal Portraits for Resource-Efficient Mechanical Fault Detection 用于资源高效机械故障检测的紧凑声信号画像
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-21 DOI: 10.1049/ell2.70551
Oleksandr Volkov, Oleksandr Bushma, Artem Sieriebriakov, Volodymyr Taranukha, Yaroslav Linder
{"title":"Compact Acoustic Signal Portraits for Resource-Efficient Mechanical Fault Detection","authors":"Oleksandr Volkov,&nbsp;Oleksandr Bushma,&nbsp;Artem Sieriebriakov,&nbsp;Volodymyr Taranukha,&nbsp;Yaroslav Linder","doi":"10.1049/ell2.70551","DOIUrl":"https://doi.org/10.1049/ell2.70551","url":null,"abstract":"<p>A resource-efficient semi-analytical method for mechanical fault detection via acoustic signal analysis is presented. A compact signal portrait is constructed by tracking dominant salient-frequency peaks over time, without a priori assumptions on peak locations. Peak feature statistics are aggregated into a 3D matrix that encodes nominal oscillatory modes. Fault detection is achieved by measuring the deviation between current and healthy portraits using a single decision threshold. Experiments on internal combustion engine recordings demonstrate improved separability and lower computational cost compared to empirical mode decomposition, confirming suitability for resource-constrained monitoring.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147299949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Miniaturised QMSIW Filter Loading Sinusoidal Curved Slot 加载正弦曲线槽的小型化QMSIW滤波器
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-18 DOI: 10.1049/ell2.70550
Hai Zhang, Weihao Xie, Zhijie He, Baoer Chen, Xiangzhou Yan, Jixi Wang, Cuiping Zeng
{"title":"Miniaturised QMSIW Filter Loading Sinusoidal Curved Slot","authors":"Hai Zhang,&nbsp;Weihao Xie,&nbsp;Zhijie He,&nbsp;Baoer Chen,&nbsp;Xiangzhou Yan,&nbsp;Jixi Wang,&nbsp;Cuiping Zeng","doi":"10.1049/ell2.70550","DOIUrl":"https://doi.org/10.1049/ell2.70550","url":null,"abstract":"<p>A miniaturised quarter-mode substrate-integrated waveguide (QMSIW) bandpass filter based on a curved slot is introduced in this paper. The proposed filter is designed by etching a sinusoidal curved slot on the top layer of the structure. Compared with the QMSIW loading conventional slots structure, the sinusoidal curved slot QMSIW filter uses a periodic structure of distributed capacitance, thereby further reducing of filter by about 22% size. Simulation and experimental results show reasonable agreement.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70550","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147299866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dispersion Measurement of Semiconductor Lasers Using Low-Coherence Holography 利用低相干全息技术测量半导体激光器色散
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-17 DOI: 10.1049/ell2.70547
Leon Zens, Andrea Knigge, Hans Wenzel, Carsten Brenner, Martin R. Hofmann
{"title":"Dispersion Measurement of Semiconductor Lasers Using Low-Coherence Holography","authors":"Leon Zens,&nbsp;Andrea Knigge,&nbsp;Hans Wenzel,&nbsp;Carsten Brenner,&nbsp;Martin R. Hofmann","doi":"10.1049/ell2.70547","DOIUrl":"https://doi.org/10.1049/ell2.70547","url":null,"abstract":"<p>We present a digital holography method for measuring the dispersive properties of semiconductor laser waveguides. The approach is based on low-coherence off-axis holography and enables the determination of wavelength-dependent group delay and group index with high accuracy. In a wavelength range of 830–870 nm, the optical path difference is evaluated through the degree of coherence between object and reference waves. Compared to existing interferometric techniques, the method allows flexible measurements outside of integrated devices and avoids aliasing artifacts in spectroscopic approaches. Experimental results obtained with InGaAsP-based semiconductor lasers show good agreement with theoretical models and demonstrate the suitability of this technique for dispersion characterization. In addition, the setup can be extended to measure other key laser parameters, such as carrier-induced refractive index changes, offering a versatile tool for semiconductor laser analysis.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70547","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147315479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interference Analysis of Beidou RDSS Users Traversing 5G Cell Networks 北斗RDSS用户穿越5G蜂窝网络的干扰分析
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-14 DOI: 10.1049/ell2.70549
Liming Du, Qian Wang, Yumeng Hou, Fangyuan Cheng
{"title":"Interference Analysis of Beidou RDSS Users Traversing 5G Cell Networks","authors":"Liming Du,&nbsp;Qian Wang,&nbsp;Yumeng Hou,&nbsp;Fangyuan Cheng","doi":"10.1049/ell2.70549","DOIUrl":"https://doi.org/10.1049/ell2.70549","url":null,"abstract":"<p>Aiming at the interference issue between Beidou RDSS and 5G systems operating in adjacent frequency bands, this letter analyses the stability of RDSS performance under complex urban network environments. With expanding urban networks and more complex deployment patterns, Beidou users experience more uncertain interference, making it necessary to analyse base-station switching during user movement to ensure stable system performance. To address this issue, this letter employs different point distribution models to simulate various network models and describe the interference situations of Beidou users when traversing 5G cellular networks. The research identifies the most suitable network model and examines interference fluctuations for both static and dynamic users, which is important for the compatible coexistence of the Beidou and 5G systems.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146224208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave Modulation Transfer: Quantitative Test of a Simplified Model Based on the Telegrapher's Equation 微波调制传输:基于电报方程的简化模型的定量检验
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-13 DOI: 10.1049/ell2.70493
Ilaria Cacciari, Anedio Ranfagni
{"title":"Microwave Modulation Transfer: Quantitative Test of a Simplified Model Based on the Telegrapher's Equation","authors":"Ilaria Cacciari,&nbsp;Anedio Ranfagni","doi":"10.1049/ell2.70493","DOIUrl":"https://doi.org/10.1049/ell2.70493","url":null,"abstract":"<p>A simplified stochastic model for microwave modulation transfer, based on wave solutions of the telegrapher's equation, is quantitatively validated against experimental signal amplitude data. With physically plausible parameters, the model accurately reproduces observed behaviors through both analytical fitting and Random Forest regression, achieving RMSE = 0.069 and R<sup>2</sup> = 0.944. By integrating stochastic transport effects with wave-based interpretations, the framework offers a unified perspective that extends beyond classical electromagnetic models. These results confirm the model's robustness and highlight its potential for broader applications in signal propagation analysis.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70493","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ambiguity Function Optimization Based on Joint Communication and Sensing Waveform 基于联合通信和感知波形的模糊函数优化
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-12 DOI: 10.1049/ell2.70546
Zheming Guo, Baixiao Chen
{"title":"Ambiguity Function Optimization Based on Joint Communication and Sensing Waveform","authors":"Zheming Guo,&nbsp;Baixiao Chen","doi":"10.1049/ell2.70546","DOIUrl":"https://doi.org/10.1049/ell2.70546","url":null,"abstract":"<p>The ambiguity function (AF) plays a critical role in joint communication and sensing (JCAS) systems. In this letter, we design a novel JCAS waveform and analyze its AF characteristics. The cut view of the AF, it is observed that the modulation and variation of communication data do not affect the zeros-delay cut, while the zero-Doppler cut changes with the modulation data. Since variations in zero-Doppler cut lead to unnecessary fluctuations and higher sidelobe levels, optimizing zero-Doppler cut for a more concentrated mainlobe and sidelobe suppression is crucial. Based on this insight, we develop a hybrid optimization algorithm, termed QGPV. It integrates the quantum genetic algorithm (QGA), quantum particle swarm optimization (QPSO), and the variable neighborhood search (VNS). The proposed algorithm QGPV reduces the sidelobe level and improves the overall resolution performance. Simulation results show that the optimized waveform achieves excellent delay and Doppler resolution, making it suitable for JCAS applications.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70546","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146216953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spatio-Temporal cGAN Based Channel Estimation for Low-Altitude Integrated Sensing and Communication Systems 基于时空cGAN的低空综合传感与通信系统信道估计
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-11 DOI: 10.1049/ell2.70536
Guixin Pan, Honghui Xu, Yixuan Wang, Kang Kang, Wenbin Li, Tianyi Liu
{"title":"Spatio-Temporal cGAN Based Channel Estimation for Low-Altitude Integrated Sensing and Communication Systems","authors":"Guixin Pan,&nbsp;Honghui Xu,&nbsp;Yixuan Wang,&nbsp;Kang Kang,&nbsp;Wenbin Li,&nbsp;Tianyi Liu","doi":"10.1049/ell2.70536","DOIUrl":"https://doi.org/10.1049/ell2.70536","url":null,"abstract":"<p>In low-altitude integrated sensing and communication systems, unmanned aerial vehicles mobility induces highly time-varying and non-stationary channels, where pilot-based or static-assumption methods fail to ensure reliable channel estimation. This paper proposes a channel estimation method combining spatio-temporal structure with conditional generative adversarial network. The U-shaped convolutional neural network is used for channel spatial feature extraction and high-precision reconstruction, while skip connections preserve fine-grained details. Furthermore, a long short-term memory network is integrated to model the temporal dynamic evolution of the channel, enhancing adaptability to non-stationary environments. A conditional adversarial training with a PatchGAN-based discriminator is introduced to improve local realism and distribution approximation. Simulation results confirm that the proposed method significantly improves estimation accuracy and robustness in low-altitude scenarios.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70536","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Analysis of Clipped Critic Loss in Proximal Policy Optimization 近端策略优化中裁剪批评家损失的分析
IF 0.8 4区 工程技术
Electronics Letters Pub Date : 2026-02-11 DOI: 10.1049/ell2.70545
Yongjin Lee, Moonyoung Chung
{"title":"On Analysis of Clipped Critic Loss in Proximal Policy Optimization","authors":"Yongjin Lee,&nbsp;Moonyoung Chung","doi":"10.1049/ell2.70545","DOIUrl":"https://doi.org/10.1049/ell2.70545","url":null,"abstract":"<p>Proximal policy optimization (PPO) is a widely used reinforcement learning algorithm valued for its robustness and sample efficiency. Its success is often attributed to the actor's clipped loss, which keeps policy updates within a trust region. In contrast, the critic's clipped loss has received relatively little attention, leaving its consistency with the trust-region principle unclear. To bridge this gap, we analyze the critic's clipped loss, show its misalignment, and propose a refined loss that enforces trust-region compliance by construction. Experiments on continuous-control tasks confirm that the proposed method improves adherence to the trust region.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"62 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70545","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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