Aeu-International Journal of Electronics and Communications最新文献_第5页

Maximizing secure communication in SWIPT-NOMA with SIC and CSI errors

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

A four-beam switchable cascaded cavity antenna loaded with bifunctional slots

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

Quasi-reflectionless bandpass filters on self-absorptive resonators with flexible absorption

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 wideband beam steering transmitarray antenna for Ka-band applications

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

Design of High Order Wideband Bandpass Filter with Wide Stopband Based on Hairpin Ring Resonator

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-15 DOI: 10.1016/j.aeue.2025.155728

Yiwei Jiao , Haiwen Liu , Hongliang Tian , Ruolin Wang , Fei Yang

{"title":"Design of High Order Wideband Bandpass Filter with Wide Stopband Based on Hairpin Ring Resonator","authors":"Yiwei Jiao , Haiwen Liu , Hongliang Tian , Ruolin Wang , Fei Yang","doi":"10.1016/j.aeue.2025.155728","DOIUrl":"10.1016/j.aeue.2025.155728","url":null,"abstract":"<div><div>In this paper, a compact high order wideband bandpass filter (BPF) with wide stopband is proposed, which is aiming at C-band satellite communications. Firstly, the hairpin ring resonator (HRR) with two independently tunable resonant modes is analyzed. Then mechanism of how feed lines are transformed as resonators to generate extra transmission poles in wideband filter design is investigated. After that, by cascading HRRs and utilizing its dual mode, a series of wideband BPF with two, three and four HRRs are designed to illustrate the wideband BPF design procedures of using multi-mode resonators and feed lines, which the selectivity of the passband is improved because of cascading more HRRs. Finally, T-shaped stubs and ladder-like stubs are introduced to generate additional transmission zeros, which expand the range of upper stopband. A 10-order wideband BPF is fabricated based on the proposed design method, which the passband is from 3.28 GHz to 5.8 GHz and fraction bandwidth is about 55.5 %. The upper stopband is from 6.22 GHz to 19.3 GHz (4.2 <em>f</em><sub>0</sub>) and rejection is below −28.9 dB. There is a good agreement between the simulation and measurement.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155728"},"PeriodicalIF":3.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454426","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

Design and validation of a multi-band metamaterial absorber for microwave applications

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-13 DOI: 10.1016/j.aeue.2025.155718

Muhammad Amir Khalil , Mohammad Tariqul Islam , Wong Hin Yong , Md. Shabiul Islam , Hui Hwang Goh , Tonni Agustiono Kurniawan , Naveed Ur Rehman Junejo , Mohamed S. Soliman , Abdul Waheed Khawaja

{"title":"Design and validation of a multi-band metamaterial absorber for microwave applications","authors":"Muhammad Amir Khalil , Mohammad Tariqul Islam , Wong Hin Yong , Md. Shabiul Islam , Hui Hwang Goh , Tonni Agustiono Kurniawan , Naveed Ur Rehman Junejo , Mohamed S. Soliman , Abdul Waheed Khawaja","doi":"10.1016/j.aeue.2025.155718","DOIUrl":"10.1016/j.aeue.2025.155718","url":null,"abstract":"<div><div>An innovative metamaterial (MTM)-based microwave absorber is proposed to feature a unique combination of rectangular and hexagonal resonators, tailored for multi-band absorption across the S, C, and X frequency bands. Built on a Rogers RT 3010 substrate, the proposed Metamaterial Absorber (MMA) demonstrates enhanced absorption efficiency, polarization independence, and angular stability. The absorber achieves multiple resonances at 3.36 GHz, 3.64 GHz, 5.06 GHz, and 6.36 GHz, with absorption values 90 %, 99.5 %, 99.7 % and 99.8 % validated through simulation analysis. The design evolution, progressing through resonator stages A, B, C, and D, highlights the impact of structural complexity on performance improvements. Experimental results align closely with simulations, showcasing minimal deviations due to fabrication imperfections. With its compact dimensions and high effective medium ratio (EMR), this MMA surpasses existing designs in multi-band functionality and efficiency, making it suitable for applications such as electromagnetic interference (EMI) shielding, radar systems, and wireless communication.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155718"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419245","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

Single/multi-band waveguide protector based on adaptive switching transmission poles and zeros

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-12 DOI: 10.1016/j.aeue.2025.155716

Xian Wang , Dongfang Zhou , Yue Wang , Dewei Zhang , Jinjin Wei , Pin Lu , Weida Bai

引用次数: 0

Wide-band metamaterial absorber for sub-6 GHz 5G applications: Reducing specific absorption rate

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-12 DOI: 10.1016/j.aeue.2025.155709

Punyatoya Routray, Debalina Ghosh

引用次数: 0

Employing a novel partitioning approach for the power transfer efficiency enhancement of near-field planar WPT system

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-12 DOI: 10.1016/j.aeue.2025.155714

Yerassyl Sabyrov, Zhanel Kudaibergenova, Mohammad Hashmi

{"title":"Employing a novel partitioning approach for the power transfer efficiency enhancement of near-field planar WPT system","authors":"Yerassyl Sabyrov, Zhanel Kudaibergenova, Mohammad Hashmi","doi":"10.1016/j.aeue.2025.155714","DOIUrl":"10.1016/j.aeue.2025.155714","url":null,"abstract":"<div><div>This paper presents the development of a near-field planar wireless power transfer (WPT) system utilizing a novel partitioning approach to enhance power transfer efficiency (PTE). The design process begins with the evaluation of various coil shapes based on their inductance, leading to the selection of a square coil structure. Then, the near-field WPT system was designed by coupling two identical planar coil-based resonators separated by a <span><math><mrow><mn>25</mn><mspace></mspace><mi>mm</mi></mrow></math></span> range. In particular, three different WPT systems, namely, the conventional one-coil and the partitioned two- and four-coil systems, were realized, each with the same area of <span><math><mrow><mn>50</mn><mo>×</mo><mn>50</mn><mspace></mspace><msup><mrow><mi>mm</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>. Notably, the effects of key design parameters are extensively analyzed to achieve the operating frequency at practical 433 MHz for all designed WPT systems. It was demonstrated that the proposed partitioning approach resulted in a PTE increase of 3% and 6% for the two- and four-coil WPT systems, respectively. Specifically, partitioned four-coil WPT achieved a superior PTE of 79%, exhibiting the effectiveness of the proposed technique. Furthermore, the proposed partitioned four-coil WPT system design was validated through experimental measurements. Finally, its performance was evaluated under various potential misalignments that may occur in practical scenarios.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"192 ","pages":"Article 155714"},"PeriodicalIF":3.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395727","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

Outage performance of UAV-assisted relaying MIMO-NOMA networks with SWIPT in Rician fading channels

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-11 DOI: 10.1016/j.aeue.2025.155713

Harun Çağiran, Oğuz Kucur, Saliha Büyükçorak

{"title":"Outage performance of UAV-assisted relaying MIMO-NOMA networks with SWIPT in Rician fading channels","authors":"Harun Çağiran, Oğuz Kucur, Saliha Büyükçorak","doi":"10.1016/j.aeue.2025.155713","DOIUrl":"10.1016/j.aeue.2025.155713","url":null,"abstract":"<div><div>In this work, we consider unmanned aerial vehicle (UAV)-assisted simultaneous wireless information and power transfer (SWIPT)-based non-orthogonal multiple access (NOMA) system with imperfect successive interference cancellation (ipSIC) over Rician fading channels. The base station (BS) and ground users (GU) have multiple antennas applying maximal ratio transmission and maximal ratio combining diversity techniques, respectively, and communicate via a single-antenna UAV that performs amplify-and-forward relaying and power splitting (PS). Closed-form outage probability expressions are derived and validated through Monte Carlo simulations in a probabilistic path loss model. Additionally, system performance is analyzed asymptotically. Numerical results show that the optimum altitude and horizontal position of the UAV vary by urban density, and the optimum PS ratios are distinct between NOMA users. The optimum altitude for a certain urban density does not change by antenna configurations and ipSIC conditions. Adding antennas to the BS results in more performance gain than increasing antennas on the GUs. When the numbers of antennas on the BS and GUs are equal, the optimal horizontal position of the UAV is quite close to the BS; however, as the number of BS antennas increases, this position shifts closer to the GUs, a notably pronounced shift for the far user.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155713"},"PeriodicalIF":3.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419246","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