IEEE microwave and wireless technology letters最新文献_第9页

Frequency Reconfigurable Pole-Zero Inversion Image Rejection Filter for 5G FR2 Transceivers 用于 5G FR2 收发器的频率可重构极零反转图像抑制滤波器

IEEE microwave and wireless technology letters Pub Date : 2024-04-18 DOI: 10.1109/LMWT.2024.3383889

Xu Wang;Jincai Wen

引用次数: 0

Optically Transparent Microwave Wilkinson Power Divider With Heterogeneous Integration 采用异质集成技术的透光微波威尔金森功率分配器

IEEE microwave and wireless technology letters Pub Date : 2024-04-17 DOI: 10.1109/LMWT.2024.3381594

Rui Geng;Xiaolian Chen;Zhao-Hua Xu;Xiao-Liang Ge;Zhi-Jun Qin;Liu Zhang;Guowei Fan;Yang Zhu;Wenming Su;Su Xu

{"title":"Optically Transparent Microwave Wilkinson Power Divider With Heterogeneous Integration","authors":"Rui Geng;Xiaolian Chen;Zhao-Hua Xu;Xiao-Liang Ge;Zhi-Jun Qin;Liu Zhang;Guowei Fan;Yang Zhu;Wenming Su;Su Xu","doi":"10.1109/LMWT.2024.3381594","DOIUrl":"https://doi.org/10.1109/LMWT.2024.3381594","url":null,"abstract":"Transparent electromagnetic devices have received extensive attention in the development of large-aperture transparent antenna arrays for smart cities and optoelectronic co- aperture integrated wireless communication. As the key component of transparent antenna arrays, an optically transparent microwave power divider that requires conductive films with various sheet resistances for high transmission and low mutual coupling still remains challenges in practical realization. Here, we experimentally demonstrate a high-performance optically transparent eight-channel Wilkinson power divider by heterogeneously integrated low-loss metal mesh and high-loss indium tin oxide (ITO). Over the radio frequency band from 1.7 to 2.5 GHz (the center frequency is 2.1 GHz) and optical band from 380 to 760 nm, the isolation of the power divider is higher than 20 dB, the transparency is higher than 72%, and the transmission coefficient is around −9.6 to −10.7 dB. Our demonstration paves the way for future tunable transparent array antenna systems and optoelectronic co- aperture integrated multifunctional applications.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141286682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MP-DPD: Low-Complexity Mixed-Precision Neural Networks for Energy-Efficient Digital Predistortion of Wideband Power Amplifiers MP-DPD：用于宽带功率放大器高能效数字预失调的低复杂度混合精度神经网络

IEEE microwave and wireless technology letters Pub Date : 2024-04-17 DOI: 10.1109/LMWT.2024.3386330

Yizhuo Wu;Ang Li;Mohammadreza Beikmirza;Gagan Deep Singh;Qinyu Chen;Leo C. N. de Vreede;Morteza Alavi;Chang Gao

{"title":"MP-DPD: Low-Complexity Mixed-Precision Neural Networks for Energy-Efficient Digital Predistortion of Wideband Power Amplifiers","authors":"Yizhuo Wu;Ang Li;Mohammadreza Beikmirza;Gagan Deep Singh;Qinyu Chen;Leo C. N. de Vreede;Morteza Alavi;Chang Gao","doi":"10.1109/LMWT.2024.3386330","DOIUrl":"10.1109/LMWT.2024.3386330","url":null,"abstract":"Digital predistortion (DPD) enhances signal quality in wideband radio frequency (RF) power amplifiers (PAs). As signal bandwidths expand in modern radio systems, DPD’s energy consumption increasingly impacts overall system efficiency. Deep neural networks (DNNs) offer promising advancements in DPD, yet their high complexity hinders their practical deployment. This article introduces open-source mixed-precision (MP) neural networks that employ quantized low-precision fixed-point parameters for energy-efficient DPD. This approach reduces computational complexity and memory footprint, thereby lowering power consumption without compromising linearization efficacy. Applied to a 160-MHz-BW 1024-QAM OFDM signal from a digital RF PA, MP-DPD gives no performance loss against 32-bit floating-point precision DPDs, while achieving −43.75 (L)/−45.27 (R) dBc in the adjacent channel power ratio (ACPR) and −38.72 dB in error vector magnitude (EVM). A 16-bit fixed-point-precision MP-DPD enables a \u0000<inline-formula> <tex-math>$2.8times $ </tex-math></inline-formula>\u0000 reduction in estimated inference power. The DPD code in PyTorch is publicly available on GitHub.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pattern-to-Absorption Prediction for Multilayered Metamaterial Absorber Based on Deep Learning 基于深度学习的多层超材料吸收器的图案-吸收预测

IEEE microwave and wireless technology letters Pub Date : 2024-04-16 DOI: 10.1109/LMWT.2024.3385982

Jiawen Wang;Caizhi Fan;Yihuan Liao;Lilin Zhou

{"title":"Pattern-to-Absorption Prediction for Multilayered Metamaterial Absorber Based on Deep Learning","authors":"Jiawen Wang;Caizhi Fan;Yihuan Liao;Lilin Zhou","doi":"10.1109/LMWT.2024.3385982","DOIUrl":"https://doi.org/10.1109/LMWT.2024.3385982","url":null,"abstract":"Metamaterial absorbers (MMAs) allow for a wider range of applications than single-layer ones for their multilayered nature, especially in ultrabroadband absorption. However, the design of multilayered MMAs is extremely complicated. Employed deep learning (DL), using a surrogate model to replace the time-consuming full-wave simulations during the design process can greatly improve the design efficiency. In this letter, an efficient approach for constructing the surrogate model of multilayered MMA is proposed. The coding frequency selective surfaces (FSSs) are converted into multichannel images and then amplified to enhance the efficiency of dataset utilization and model training. A convolutional neural network (CNN) is developed as the surrogate model to achieve pattern-to-absorption prediction for the multilayered MMA with a high degree of freedom. Trained on only 18 000 instances with \u0000<inline-formula> <tex-math>$2^{108}$ </tex-math></inline-formula>\u0000 total permutations, the CNN can predict the absorption of the meta-atoms within the frequency range of 1.00–20.00 GHz in 0.05 s with a mean deviation of 0.02144. Our letter provides an efficient way to construct surrogate models for multilayered MMA in the DL-based design process.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140902601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Ka-Band Transition From Integrated-on-Lid Microstrip to Ridge Gap Waveguide 从集成盖上微带到脊隙波导的 Ka 波段过渡

IEEE microwave and wireless technology letters Pub Date : 2024-04-16 DOI: 10.1109/LMWT.2024.3387474

Changjian Tao;Haidong Zheng

引用次数: 0

A 6.3–7.6 GHz VCO Achieving 192.7 dBc/Hz FoM With Dual Common-Mode Resonances 6.3-7.6 GHz VCO 实现 192.7 dBc/Hz FoM 和双共模谐振

IEEE microwave and wireless technology letters Pub Date : 2024-04-16 DOI: 10.1109/LMWT.2024.3386706

Kaitian Yang;Xiaolong Liu

引用次数: 0

A Broadband PA With Complementary Matching to Get High Impedance Transformation Ratio of 125 With 60% Bandwidth on Two-Layer HBT Process 一种采用互补匹配的宽带功率放大器，可在双层 HBT 工艺上获得 125 的高阻抗变换比和 60% 的带宽

IEEE microwave and wireless technology letters Pub Date : 2024-04-16 DOI: 10.1109/LMWT.2024.3386874

Wenhuan Han;Weiwei Dong;Zhongming Xue;Li Geng

引用次数: 0

Numerical Demonstration of THz Traveling Wave Amplifications in 2-D Electron Gas (2DEG) Under Scattering-Free and Low-Charge Density Regime 二维电子气体 (2DEG) 在无散射和低电荷密度条件下的太赫兹行波放大数值演示

IEEE microwave and wireless technology letters Pub Date : 2024-04-16 DOI: 10.1109/LMWT.2024.3383769

Shubhendu Bhardwaj;Md Faiyaz Bin Hassan

{"title":"Numerical Demonstration of THz Traveling Wave Amplifications in 2-D Electron Gas (2DEG) Under Scattering-Free and Low-Charge Density Regime","authors":"Shubhendu Bhardwaj;Md Faiyaz Bin Hassan","doi":"10.1109/LMWT.2024.3383769","DOIUrl":"https://doi.org/10.1109/LMWT.2024.3383769","url":null,"abstract":"In this letter, we investigate the terahertz field fluctuations and dynamic interactions with electrons in a 2-D electron gas (2DEG) under the influence of slow wave structure in a substrate-based device. Low-charge density and the scattering-free regime are considered to maintain practical simulation times. The dynamics of this interaction are simulated using a co-planar waveguide (CPW)-connected interdigitated metal grating structure to provide electromagnetic (EM) excitation and phase velocity comparable to electron drift in the 2DEG channel. This letter demonstrates that interdigitated slow wave structure provides a media for synchronous interaction between electron gas and EM waves leading to amplification of charge density and velocity oscillations in a 2DEG. The method used for this numerical work is a full-wave-global numerical model that uses finite-difference time domain (FDTD)-based particle in cell solver of electron transport in 2DEG, with self-consistent EM field solution. Under the considered regime and device, the current oscillations show an increase in amplitude which illustrates the effect of synchronous interaction between the 2DEG.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141292508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave Reflection Model for Human Respiration Based on a Circular Membrane 基于圆膜的人体呼吸微波反射模型

IEEE microwave and wireless technology letters Pub Date : 2024-04-15 DOI: 10.1109/LMWT.2024.3385482

Michael Gottinger;Nicola Notari;Samuel Kranz;Samuel Dutler;Robin Vetsch;Tindaro Pittorino;Christoph Würsch;Guido Piai

引用次数: 0

A 194-GHz Three-Stage Differential Driver Amplifier Utilizing a Three-Element Embedded Core at Near-fmax Frequencies in 65-Nm CMOS 利用三元件嵌入式内核的 194-GHz 三级差分驱动器放大器，采用 65-Nm CMOS，频率接近最大值

IEEE microwave and wireless technology letters Pub Date : 2024-04-12 DOI: 10.1109/LMWT.2024.3384700

Fei He;Qian Xie;Zheng Wang

引用次数: 0