Aeu-International Journal of Electronics and Communications最新文献_第8页

Reconfigurable designs of equilateral triangular microstrip antennas for single and dual band circular polarized response in GSM and GPS applications GSM和GPS应用中单双波段圆极化响应的等边三角形微带天线的可重构设计

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-22 DOI: 10.1016/j.aeue.2025.155729

Amit A. Deshmukh, Aniruddh Viswanathan, Prasanna Nadkarni, Venkata A.P. Chavali, Heet Mistry

引用次数: 0

High-efficiency wideband inductor-less platinum-band CMOS rectifier 高效宽带无电感铂带CMOS整流器

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-22 DOI: 10.1016/j.aeue.2025.155737

Willy Jordan, Adel Barakat, Babita Gyawali, Ramesh K. Pokharel

引用次数: 0

Investigation of the effects of various parameters on wireless power transfer efficiency 研究各种参数对无线电力传输效率的影响

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-21 DOI: 10.1016/j.aeue.2025.155723

Mert Yilmaz , Erdal Cetkin , Hakan Akca

{"title":"Investigation of the effects of various parameters on wireless power transfer efficiency","authors":"Mert Yilmaz , Erdal Cetkin , Hakan Akca","doi":"10.1016/j.aeue.2025.155723","DOIUrl":"10.1016/j.aeue.2025.155723","url":null,"abstract":"<div><div>Electric vehicles have dominated the automotive market, especially in recent years. However, the charging problem that stresses drivers continues. Although conductive charging is an established technology, it still needs to meet user expectations fully. On the other hand, wireless charging technology attracts users’ attention with dynamic charging features. Although this technology improves daily, efficiency is not at the desired level. In this study, a wireless power transfer system was designed for electric vehicles, and the factors affecting the charging efficiency were investigated. This system consists of an inverter, a compensation system, and a load. The efficiency of the system according to cable type, air gap, cooling, and pulse-width modulation parameters was observed through 40 experiments, each lasting 20 min. In addition to efficiency, the frequency behavior was also investigated. Experimental results were compared with models designed in MATLAB and ANSYS software. The average errors between the experimental and simulation results are 1.75, 2.03, 1.85, 1.58, and 2.00% for air gaps of 19–20, 55–56, 91–92, 127–128, and 145–146 mm, respectively. Power was transferred wirelessly with a minimum efficiency of 59.25% at a 145 mm air gap and a maximum efficiency of 85.74% at a 56 mm air gap in 300 W tests.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155723"},"PeriodicalIF":3.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis and design of concurrent class-F2 power amplifier based on power-series technique 基于功率串联技术的并行f2类功率放大器的分析与设计

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-21 DOI: 10.1016/j.aeue.2025.155722

Jinting Liu , Weimin Shi , Yufeng Zang , Jun Hua , Gaoming Xu , Chunyu Hu , Ke Liu , Yu Li , Mingyu Li

{"title":"Analysis and design of concurrent class-F2 power amplifier based on power-series technique","authors":"Jinting Liu , Weimin Shi , Yufeng Zang , Jun Hua , Gaoming Xu , Chunyu Hu , Ke Liu , Yu Li , Mingyu Li","doi":"10.1016/j.aeue.2025.155722","DOIUrl":"10.1016/j.aeue.2025.155722","url":null,"abstract":"<div><div>Though the design procedures of dual-band power amplifiers (PAs) have been thoroughly studied in previous works, these studies have seldom delved into analyze the dual-band PA when it is driven by a concurrent dual-band signal. This paper presents the analysis and design of broadband class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA operating in concurrent mode. The class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA driven by a concurrent dual-band signal is analyzed using power series technique. It is illustrated that, compared to a concurrent class-B PA, the concurrent class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA exhibits an increased output power of 4.8 dB. Furthermore, when excited by a concurrent two-tone signal, the output power decrease of the class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA is merely 0.8 dB, as opposed to single-tone signal excitation. A broadband 1.8–2.2 GHz class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA supporting concurrent operation is designed and measured in this work. When excited by a single-tone signal, the broadband PA achieves a maximum output power of 41.1–42.4 dBm with a drain efficiency (DE) of 61.8%–67.3%. On the other hand, under the excitation of a concurrent two-tone signal centered at 2.0 GHz, the fabricated PA achieves an output power of 40.0–40.6 dBm with a DE of 60.0%–64.0% across a tone-spacing of 0–400 MHz.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155722"},"PeriodicalIF":3.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A ramp-based background calibration technique for timing mismatch in time-interleaved ADCs 基于斜坡的时间交错adc时序失配背景校正技术

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-20 DOI: 10.1016/j.aeue.2025.155717

Yahan Yu , Peng Miao , Fei Li, Di Wang, Haotian Zhang, Ankang Ding

{"title":"A ramp-based background calibration technique for timing mismatch in time-interleaved ADCs","authors":"Yahan Yu , Peng Miao , Fei Li, Di Wang, Haotian Zhang, Ankang Ding","doi":"10.1016/j.aeue.2025.155717","DOIUrl":"10.1016/j.aeue.2025.155717","url":null,"abstract":"<div><div>This paper presents a ramp-based background calibration technique for timing skew detection and correction in time-interleaved analog-to-digital converters (TI ADCs). The method achieves input independence through an internally generated ramp calibration signal. To enable the calibration to operate in the background without interrupting the ADC’s conversion process, a replica switch is integrated into each sub-ADC to sample the designated ramp signal. The comparator determines the sign of the timing skew by comparing the sampled values of the replica and reference switches. This technique is more efficient than traditional statistical-based algorithms and demonstrates more rapid convergence speed. Furthermore, contrary to algorithms utilizing FIR filters or reference ADCs, the simplified timing skew detection and correction circuit provides lower power consumption and hardware overhead. To validate the proposed technique, it was applied to a 12-bit, 2 GS/s, 4-channel TI ADC. Simulation results demonstrate the feasibility and accuracy of this calibration technique.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155717"},"PeriodicalIF":3.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sequences design using orthogonal polynomials to mitigate side-lobes for MIMO radar and SAR imaging application 利用正交多项式设计序列，以减少多输入多输出雷达和合成孔径雷达成像应用中的边叶现象

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-20 DOI: 10.1016/j.aeue.2025.155724

Ankur Thakur , Naman Garg , Anshu Thakur , Davinder Singh Saini

{"title":"Sequences design using orthogonal polynomials to mitigate side-lobes for MIMO radar and SAR imaging application","authors":"Ankur Thakur , Naman Garg , Anshu Thakur , Davinder Singh Saini","doi":"10.1016/j.aeue.2025.155724","DOIUrl":"10.1016/j.aeue.2025.155724","url":null,"abstract":"<div><div>Transmit radar sequences are designed for side-lobes mitigation in multiple-input multiple-output (MIMO) radar systems. This paper uses orthogonal polynomials to design sequences by varying the optimizing parameter <span><math><mi>γ</mi></math></span> to achieve significant bandwidth and minimal side-lobes simultaneously. Those polynomial orders are chosen which provide the wider bandwidth at optimal <span><math><mi>γ</mi></math></span> value. The value of <span><math><mi>γ</mi></math></span> has to be optimized for higher side-lobes reduction. In MIMO radar, the proposed Chebyshev orthogonal polynomial (COP) and Legendre orthogonal polynomial (LOP) sequences are analyzed with different numbers of transmitting antennas to mitigate peak side-lobe levels (PSL) and cross-correlation side-lobe levels (CCSL). Further, the least square estimate (LSE) and Capon estimate (CE) techniques are used to analyze the performance of the designed sequences for synthetic aperture radar (SAR) imaging applications. The proposed sequences effectiveness is compared to the counterpart methods for validation purposes.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155724"},"PeriodicalIF":3.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maximizing secure communication in SWIPT-NOMA with SIC and CSI errors 在具有SIC和CSI错误的swift - noma中最大化安全通信

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-20 DOI: 10.1016/j.aeue.2025.155740

V.Narasimha Nayak , Kiran Kumar Gurrala , Turimerla Pratap , K.Nageswara Rao

{"title":"Maximizing secure communication in SWIPT-NOMA with SIC and CSI errors","authors":"V.Narasimha Nayak , Kiran Kumar Gurrala , Turimerla Pratap , K.Nageswara Rao","doi":"10.1016/j.aeue.2025.155740","DOIUrl":"10.1016/j.aeue.2025.155740","url":null,"abstract":"<div><div>This article investigates the secrecy rate (SR) analysis of a new control-jamming (CJ) assisted SWIPT-NOMA network with decode-and-forward (DF) cooperative relaying subject to a total transmit power budget. Specifically, power-splitting (PS) protocol is employed at the relay for energy harvesting (EH). The harvested energy is utilized for transmitting information to users through a flat-Rayleigh-fading channel. Importantly, the network’s performance is investigated in terms of SR with successive interference cancellation (SIC) and channel-state-information (CSI) errors. To provide a comprehensive analysis, CJ is compared with various jamming conditions, which can secure the wireless transmissions against the eavesdropping. Further, the analytical expression for Ergodic SR is also obtained and confirmed through simulation. Moreover, A Particle swarm optimization (PSO) algorithm is utilized to determine the optimal power distribution among various nodes. The impact of critical parameters like transmit SNR and also the J-to-Eve and R-to-Eve distances on the level of secrecy are also analyzed. Finally, Monte-Carlo simulations validate that at a transmit SNR of 20 dB, the optimal power allocation (OPA) scheme under CJ achieves 12 % and 5 % improvement in SR at users U<sub>1</sub> and U<sub>2.</sub> Additionally, CJ also effectively boost the network’s secrecy over other jamming cases under all CSI and SIC conditions.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155740"},"PeriodicalIF":3.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quasi-reflectionless bandpass filters on self-absorptive resonators with flexible absorption 柔性吸收自吸收腔上的准无反射带通滤波器

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-18 DOI: 10.1016/j.aeue.2025.155741

Jiaqian Cui, Lei Zhu

{"title":"Quasi-reflectionless bandpass filters on self-absorptive resonators with flexible absorption","authors":"Jiaqian Cui, Lei Zhu","doi":"10.1016/j.aeue.2025.155741","DOIUrl":"10.1016/j.aeue.2025.155741","url":null,"abstract":"<div><div>Reflectionless filters have been extensively studied to reduce interference in communication systems. This article presents an integral design method for quasi-reflectionless bandpass filters (BPFs) that achieve flexible responses with controllable out-of-band absorption. First, the concept of the self-absorptive resonator is proposed to facilitate the integral design. It is utilized to replace conventional resonators to produce sufficient out-of-band absorption while keeping in-band transmission. The flexible absorption features are demonstrated in two different prototypes. The narrow-band filter, based on the lumped circuit equivalence, exhibits a wide absorption band near the passband. With the transmission-line (TL) characteristics considered, the absorption circuit is modified for a high-order design to extend absorption bands. Meanwhile, the wideband filter achieves an infinite quasi-reflectionless range by employing coupled lines with open ends in between. The wideband synthesis process is applied with its TL equivalent circuit. The implementations of two prototypes on microstrip lines further verify their compact sizes and wide quasi-reflectionless ranges, as well as the versatility and simplicity of this method.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155741"},"PeriodicalIF":3.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A four-beam switchable cascaded cavity antenna loaded with bifunctional slots 加载双功能槽的四波束可切换级联腔天线

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-18 DOI: 10.1016/j.aeue.2025.155721

Wenhao Wang, Liujia E., Jinwei Zhang, Zhonglei Mei

{"title":"A four-beam switchable cascaded cavity antenna loaded with bifunctional slots","authors":"Wenhao Wang, Liujia E., Jinwei Zhang, Zhonglei Mei","doi":"10.1016/j.aeue.2025.155721","DOIUrl":"10.1016/j.aeue.2025.155721","url":null,"abstract":"<div><div>A cavity-cascaded antenna loaded with bifunctional slots and featuring four reconfigurable beams is proposed in this work. First, a compact trapezoidal cavity-cascaded antenna is realized using metallic vias. Then, three U-shaped slots are ingeniously etched onto the patch, serving the dual purposes of notch filtering and phase alteration, enhancing the antenna’s operational flexibility. Finally, diodes are loaded at the slot openings to realize the reconfigurable bifunctional slotas, and by controlling their operational states, the field distribution is regulated, resulting in four distinct directional radiation modes. A prototype capable of covering the WiFi 5.8-GHz band (5.725–5.85 GHz) was fabricated and tested. The experimental results reveal that the proposed antenna achieves a peak gain exceeding 8.65 dBi and a radiation efficiency above 88% within the operating frequency band. It is worth noting that, this antenna design distinguishes itself from existing pattern-reconfigurable antennas by its simplified structure and gteat functionality, driven by the innovative use of reconfigurable bifunctional slots.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155721"},"PeriodicalIF":3.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A wideband beam steering transmitarray antenna for Ka-band applications 一种用于ka波段应用的宽带波束转向发射阵列天线

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-18 DOI: 10.1016/j.aeue.2025.155720

Peyman PourMohammadi , Hassan Naseri , Noureddine Melouki , Fahad Ahmed , Qi Zheng , Amjad Iqbal , Tayeb A. Denidni

{"title":"A wideband beam steering transmitarray antenna for Ka-band applications","authors":"Peyman PourMohammadi , Hassan Naseri , Noureddine Melouki , Fahad Ahmed , Qi Zheng , Amjad Iqbal , Tayeb A. Denidni","doi":"10.1016/j.aeue.2025.155720","DOIUrl":"10.1016/j.aeue.2025.155720","url":null,"abstract":"<div><div>In this paper, a broadband transmitarray antenna is designed to achieve beamsteering ability with high aperture efficiency for 5G communication systems. To this end, at first an innovative unit cell is designed based on constructive mutual coupling with 1-bit phase quantization (0°/180°), utilizing the current reverse technique. The proposed unit cell includes a modified patch array on top of the upper substrate (Tx) and two modified patch arrays on the bottom of the lower substrate (Rx). A metalized via-hole connects both layers. The results illustrate low insertion loss, consistently preserved across all phase configurations, alongside a broad 3-dB transmission bandwidth spanning from 25.82 GHz to 38.57 GHz (12.75 GHz). This is because the intensity of the current distribution varies across frequencies in the proposed unit cell. By combining these varying amplitudes across frequencies, the design achieves a wider bandwidth (BW). Next, a transmit array antenna is constructed using the proposed unit cell to confirm the beam-forming principle. The results indicate accurate beam steering to the intended angles with decent sidelobe levels, accompanied by an antenna gain increase of 12.22 dBi over its feed, reaching 25.52 dBi at 28 GHz. This significant gain results in an aperture efficiency of 41.6%. Besides, the −3 dB gain ranges from 26.8 to 36.1 GHz (9.3 GHz), corresponding to a bandwidth of 33.3% at the center frequency of 28 GHz. This enhancement stems from incorporating two unit cells in one unit cell, half-elliptical and rectangular-shaped patches, forming an array. To the best of the authors’ knowledge, the proposed transmitarray antenna outperforms existing designs in terms of −3 dB gain bandwidth and aperture efficiency, representing a substantial contribution to the field of 5G antenna technologies.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155720"},"PeriodicalIF":3.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0