IEEE journal of microwaves最新文献_第7页

Photonic Stepped-Frequency Intensity Modulated Comb Terahertz Radar 光子阶跃频率强度调制梳状太赫兹雷达

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-18 DOI: 10.1109/JMW.2025.3544017

Vladyslav Cherniak;Kevin Kolpatzeck;Jan C. Balzer

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IEEE Journal of Microwaves Information for Authors IEEE微波信息作者杂志

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-18 DOI: 10.1109/JMW.2025.3541904

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Modified Three-Way Doherty Power Amplifier Design Using Simplified Transistor Model Assisted Optimization for Ultra-Wideband Applications 基于简化晶体管模型的超宽带改进三通Doherty功率放大器设计

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-17 DOI: 10.1109/JMW.2025.3545033

Ruibin Gao;Yi Zhang;Zhijiang Dai;Weimin Shi;Mingyu Li;Shichang Chen;Jingzhou Pang

{"title":"Modified Three-Way Doherty Power Amplifier Design Using Simplified Transistor Model Assisted Optimization for Ultra-Wideband Applications","authors":"Ruibin Gao;Yi Zhang;Zhijiang Dai;Weimin Shi;Mingyu Li;Shichang Chen;Jingzhou Pang","doi":"10.1109/JMW.2025.3545033","DOIUrl":"https://doi.org/10.1109/JMW.2025.3545033","url":null,"abstract":"This paper presents the design and realization of an ultra-wideband three-way Doherty power amplifier (DPA). A modified load modulation network (LMN) with very simple circuit structure is proposed to enhance the bandwidth of three-way DPAs. An equivalent transmission line (TL) network is employed to construct the proposed LMN, which absorbs the package and parasitic parameters of the active devices. Meanwhile, the complex combining load is also employed to further improve the broadband performance of the proposed three-way DPA. To streamline the design process for complex power amplifiers (PAs), we introduce a tailored, expedited approach that harnesses a simplified transistor behavioral model and corresponding design methodology. This methodology significantly diminishes the complexities associated with multi-way DPA designs, enabling the swift completion of initial design iterations. To validate the proposed circuit architecture and design strategy, a three-way DPA with a bandwidth spanning more than one octave is designed and fabricated using commercial Gallium Nitride (GaN) devices. The fabricated three-way DPA achieves efficiency higher than 46% at 6 dB output power back-off (OBO) throughout the band from 0.7 GHz to 2.3 GHz, with a small signal gain of 11.7–13.9 dB. At saturation, 43.9–46.4 dBm output power can be obtained with peak efficiency of 58.9–78.1% . The modulation signal test has also been completed with a 64 QAM signal which has a PAPR of 6.7 dB and a bandwidth of 10 MHz, ACPR better than −20.8 dBc has been achieved.","PeriodicalId":93296,"journal":{"name":"IEEE journal of microwaves","volume":"5 3","pages":"711-725"},"PeriodicalIF":6.9,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930730","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Call for Papers—Announcing a New Special Issue: Microwaves in Medicine & Biology 征文-宣布一个新的特刊：微波在医学和生物学

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3568236

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95 GHz Indoor Propagation Measurement and 3GPP-Compatible Channel Model for Sub-THz Indoor Short-Range Communications 亚太赫兹室内短距离通信的95 GHz室内传播测量与3gpp兼容信道模型

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3562285

Yusuke Koda;Norichika Ohmi;Hiroaki Endo;Hiroshi Harada

{"title":"95 GHz Indoor Propagation Measurement and 3GPP-Compatible Channel Model for Sub-THz Indoor Short-Range Communications","authors":"Yusuke Koda;Norichika Ohmi;Hiroaki Endo;Hiroshi Harada","doi":"10.1109/JMW.2025.3562285","DOIUrl":"https://doi.org/10.1109/JMW.2025.3562285","url":null,"abstract":"This study presents a 95 GHz indoor channel measurement campaign for an ultra-wideband short-range communication scenario and proposes an intra-cluster stochastic channel generation procedure compatible with the well-known 3GPP stochastic channel model (SCM) for this use case with a larger bandwidth than 2 GHz. Recently, a 3GPP-compatible SCM for device-to-device (D2D) short-range communication in a bandwidth of 2 GHz has been developed at the 60 GHz band to provide a unified channel generation framework aligned with 3GPP-led cellular-type communications with lower bandwidth (e.g., 400 MHz typical for millimeter wave communications). This study aims to extend this framework for an upper band and larger bandwidth by defining the experimentally found large-scale parameters at 90–100 GHz while adjusting the intra-cluster subpath generation mechanism. To this end, we first conduct a wideband multipath channel measurement at 95 GHz center frequency with 4 GHz bandwidth in a simple conference room scenario as an exemplary environment of wideband short-range communication. Statistical characteristics of a complete set of large-scale parameters (LSPs) for running the 3GPP-compatible SCM are derived where LSP trends specific to D2D short-range communication scenarios in a small conference room and extendable from the recent 60 GHz measurements are observed. Moreover, we propose an unequal intra-cluster subpath generation procedure, serving as an additional adjustment for accurate channel generation for bandwidths greater than 2 GHz. Numerical evaluation reveals the feasibility of generating channel impulse responses capturing more accurate characteristics at both the large-scale level and intra-cluster level. Specifically, owing to the proposed adjustment, the statistical characteristics in the intra-cluster subpath well fit the results from our presented measurements.","PeriodicalId":93296,"journal":{"name":"IEEE journal of microwaves","volume":"5 3","pages":"583-599"},"PeriodicalIF":6.9,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10994203","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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IEEE Journal of Microwaves Information for Authors IEEE微波信息作者杂志

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3561531

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IEEE Microwave Theory and Technology Society Publication Information IEEE微波理论与技术学会出版物信息

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3561527

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Introduction to the May 2025 Issue 2025年5月版简介

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3563079

Peter H. Siegel

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IEEE Journal of Microwaves Table of Contents IEEE微波杂志目录

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3561533

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GPU-Based Implementation of Pruned Artificial Neural Networks for Digital Predistortion Linearization of Wideband Power Amplifiers 基于gpu的宽带功率放大器数字预失真线性化修剪人工神经网络实现

IF 6.9

IEEE journal of microwaves Pub Date : 2025-03-08 DOI: 10.1109/JMW.2025.3560420

Wantao Li;Raúl Criado;William Thompson;Gabriel Montoro;Kevin Chuang;Pere L. Gilabert

{"title":"GPU-Based Implementation of Pruned Artificial Neural Networks for Digital Predistortion Linearization of Wideband Power Amplifiers","authors":"Wantao Li;Raúl Criado;William Thompson;Gabriel Montoro;Kevin Chuang;Pere L. Gilabert","doi":"10.1109/JMW.2025.3560420","DOIUrl":"https://doi.org/10.1109/JMW.2025.3560420","url":null,"abstract":"This paper presents a feature selection technique based on <inline-formula><tex-math>$ell _{1}$</tex-math></inline-formula> regularization to select the most relevant weights of artificial neural networks (ANNs) for digital predistortion (DPD) linearization of wideband radio-frequency (RF) power amplifiers (PAs). The proposed pruning method is applied to the first hidden layer of a feed-forward real-valued time-delay neural network, commonly used for DPD purposes. In addition, this paper presents the ANN-based DPD implementation using a graphic processing unit (GPU) with compute unified device architecture (CUDA) units. Thanks to the proposed pruning strategy, it is possible to reduce the ANN complexity significantly, thereby achieving a higher data throughput with the GPU-based implementation. The trade-off among RF performance metrics, number of model parameters and throughput of the GPU implementation is evaluated considering the linearization of a high-efficiency pseudo-Doherty load modulated balanced amplifier (LMBA). The linearized PA operating at an RF frequency of 2 GHz delivers a mean output power of 40 dBm with approximately 50% power efficiency when excited with 5G new radio (NR) signals with up to 200 MHz bandwidth and an 8 dB peak-to-average power ratio (PAPR). The real-time GPU implementation of the ANN-based DPD can meet the linearity specifications with a throughput circa 1 GSa/s.","PeriodicalId":93296,"journal":{"name":"IEEE journal of microwaves","volume":"5 3","pages":"726-738"},"PeriodicalIF":6.9,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10994208","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0