IEEE Open Journal of Antennas and Propagation最新文献_第9页

Transparent Low-Profile and Wideband ITO-Glass Microwave Absorber 透明低轮廓和宽带ito玻璃微波吸收器

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-10-07 DOI: 10.1109/OJAP.2024.3474770

Ahmed Hosameldin Khadrawy;Ahmed Abdelmottaleb Omar

{"title":"Transparent Low-Profile and Wideband ITO-Glass Microwave Absorber","authors":"Ahmed Hosameldin Khadrawy;Ahmed Abdelmottaleb Omar","doi":"10.1109/OJAP.2024.3474770","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3474770","url":null,"abstract":"This paper proposes a transparent wideband microwave absorber by integrating Indium Tin Oxide (ITO) with glass in order to achieve both high microwave absorption and optical transparency. The design is constructed from three layers of glass substrate with etched ITO with different sheet resistance on each layer. The absorber features a combination of high dielectric constant material to accomplish the low-profile design and matching layer to achieve wide absorption bandwidth. The absorber demonstrates 115.64% fractional bandwidth from 3.48 GHz to 13.02 GHz with a structure thickness of 0.077 <inline-formula> <tex-math>$lambda_{min}$ </tex-math></inline-formula>, where <inline-formula> <tex-math>$lambda_{min}$ </tex-math></inline-formula> is the free-space wavelength at the lowest operating frequency. The proposed absorber design shows wide absorption bandwidth with a low profile, which outperforms the reported designs in the literature. The development process of the absorber is detailed, showcasing the evolution from a single-layer to a triple-layer design, addressing challenges in fabrication and enhancing performance. The absorber’s effectiveness is validated through simulations and measurements of a fabricated prototype, highlighting its potential in applications requiring both microwave absorption and optical transparency.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"6 1","pages":"127-132"},"PeriodicalIF":3.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10706111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107074","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

X-Band Waveguide Reflectionless Filtering Antenna Array With High Selectivity 高选择性x波段波导无反射滤波天线阵列

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-30 DOI: 10.1109/OJAP.2024.3470843

Jun Ma;Fuchang Chen;Kairan Xiang

{"title":"X-Band Waveguide Reflectionless Filtering Antenna Array With High Selectivity","authors":"Jun Ma;Fuchang Chen;Kairan Xiang","doi":"10.1109/OJAP.2024.3470843","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3470843","url":null,"abstract":"In this paper, a waveguide reflectionless filtering antenna array with high selectivity is proposed. Instead of reflecting the out-of-band signal back to the source, the proposed antenna array dissipates the energy through a lossy network, which can reduce the interference to the former stage. The prototype circuit of the reflectionless filtering antenna array based on the complementary duplex theory is established, consisting of a bandpass network and a bandstop network, whose responses are completely complementary. High selectivity is achieved by introducing non-resonating nodes (NRNs) and configuring the transmission zeros (TZs) of the bandpass network and the reflection zeros (RZs) of the bandstop network to be set at the same frequency. The synthesis of the prototype circuit is given and a fourth-order reflectionless filtering antenna array is designed and fabricated to verify the design method. Two TZs are generated at 9.62 GHz and 10.4 GHz, leading to an out-of-band suppression of more than 23 dB. The measured <inline-formula> <tex-math>$|S_{11}|$ </tex-math></inline-formula> is less than −10 dB from 8.3 GHz to 12 GHz, providing a wideband reflectionless filtering response with high selectivity and high gain.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"6 1","pages":"120-126"},"PeriodicalIF":3.5,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10700742","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107076","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

A Hybrid Frequency Selective Absorber With Dual-Polarized Wireless Communication and Ultra-Wideband Absorption 具有双极化无线通信和超宽带吸收的混合频率选择吸收器

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-30 DOI: 10.1109/OJAP.2024.3470209

Youquan Wen;Sai-Wai Wong;Chunlin Ji;Ruopeng Liu;Yejun He

引用次数: 0

Multibeam Antennas Based on 3-D Discrete Lenses With Magnified Field-of-View 基于三维离散透镜的放大视场多波束天线

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-27 DOI: 10.1109/OJAP.2024.3469271

Lisa Berretti;Renaud Loison;Esteban Menargues;Lucas Polo-López;Giovanni Toso;María García-Vigueras

{"title":"Multibeam Antennas Based on 3-D Discrete Lenses With Magnified Field-of-View","authors":"Lisa Berretti;Renaud Loison;Esteban Menargues;Lucas Polo-López;Giovanni Toso;María García-Vigueras","doi":"10.1109/OJAP.2024.3469271","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3469271","url":null,"abstract":"A new type of beamforming network (BFN) based on three-dimensional (3D) discrete lenses is introduced and numerically analyzed in this paper as an antenna system capable of generating multiple beams within a large Field-of-View (FoV). To enhance scanning capabilities, these lenses have their back part and associated feed array magnified relative to the front part. It is also shown that the radiating elements constituting the front part of the lens, due to the shape of their element factor, tend to limit the pointing direction of the overall antenna pattern, but their influence decreases as the lens dimension. Accordingly, a large front array is chosen to scan wide angles and mitigate this limitation. For the preliminary dimensioning and design of the entire BFN, a Geometrical Optics (GO) technique is employed. Subsequently, a rigorous methodology exploiting boundary conditions in the planes of symmetry is implemented to simulate the full-wave behavior of the front array of the lens, which is challenging due to limited computational resources for large arrays. This methodology, which also exploits the even/odd concept, is validated using a small array as a test case. By employing both the GO technique and rigorous full-wave analysis, it is numerically verified that this type of lens system can produce beams pointing up to 70° from the boresight direction while maintaining good levels of cross-polar discrimination in all azimuthal planes. Additionally, numerical evidence shows that these magnified lenses can increase their FoV compared to lenses with equal back and front sizes, reaching approximately 50° of scanning. The multibeam features of this lens are also numerically validated.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"6 1","pages":"98-109"},"PeriodicalIF":3.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10697111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107002","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

Performance Analysis of Iterative Methods in Microwave Imaging With Various Regularization Techniques 采用各种正则化技术的微波成像迭代法性能分析

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-26 DOI: 10.1109/OJAP.2024.3468334

Reihaneh Ahmadi Vanhari;Ahmad Bakhtafrouz;Sima Noghanian

{"title":"Performance Analysis of Iterative Methods in Microwave Imaging With Various Regularization Techniques","authors":"Reihaneh Ahmadi Vanhari;Ahmad Bakhtafrouz;Sima Noghanian","doi":"10.1109/OJAP.2024.3468334","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3468334","url":null,"abstract":"Quantitative microwave imaging (MWI) involves solving the inverse scattering problem (ISP), which is characterized by nonlinearity and ill-posedness. To address the challenges posed by ISP, iterative linearization techniques have been introduced alongside regularization procedures. Born Iterative Method (BIM) and Distorted Born Iterative Method (DBIM) are well-established approaches in the field of microwave imaging. The primary objective of our study was to conduct a comparative analysis to evaluate the performance of traditional regularization techniques such as Truncated Singular Value Decomposition (TSVD), Tikhonov regularization, and the truncated Landweber algorithm with choosing different regularization parameters, within the framework of these established methods. The lack of explicit mention of optimal parameter values and comparison of regularization methods highlights a gap in the existing literature. Investigating and comparing different regularization methods and their corresponding optimal parameter values for different structures and features within the framework of linearization methods can provide valuable insights into effectively solving inverse problems in MWI. Additionally, exploring how different regularization parameters impact the accuracy and stability of the solutions obtained through BIM and DBIM can help researchers and practitioners make informed decisions to choose a regularization method and its corresponding parameter value for a specific problem. Our research aimed to provide a comprehensive baseline that would be beneficial for future studies and practical applications in microwave imaging.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"5 6","pages":"1523-1538"},"PeriodicalIF":3.5,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10695748","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679244","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

Design and Analysis of a Carbonyl Iron Powder/Epoxy Composite-Based Ultra-Wideband Multi-Pyramidal Magnetic Absorber Using an Equivalent Circuit Model 基于等效电路模型的羰基铁粉/环氧复合材料超宽带多锥体吸收体设计与分析

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-25 DOI: 10.1109/OJAP.2024.3467342

Aparna Parameswaran;Nohgyeom Ha;Soo Hyun Kim;Sukjin Kwon;Byeongjin Park;Sangkil Kim

{"title":"Design and Analysis of a Carbonyl Iron Powder/Epoxy Composite-Based Ultra-Wideband Multi-Pyramidal Magnetic Absorber Using an Equivalent Circuit Model","authors":"Aparna Parameswaran;Nohgyeom Ha;Soo Hyun Kim;Sukjin Kwon;Byeongjin Park;Sangkil Kim","doi":"10.1109/OJAP.2024.3467342","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3467342","url":null,"abstract":"This paper presents a CIP/epoxy composite based ultra-wide band electromagnetic multipyramidal absorber. The constituent parameters of the CIP/epoxy composite is experimentally extracted using a waveguide measurement setup. This raw data is then quantified using a least-square fit polynomial based curve fitting technique to facilitate its use in the design and the analysis of the pyramidal absorber. Four asymmetrical truncated pyramids supported by a grounded base constitute the absorber unit cell. The absorption bandwidth of the design ranges from 3.21 GHz to 40 GHz (FBW of 170.3%, S - band to V - band) and stable absorption characteristics under oblique incidences is observed up to 35°. To enhance the understanding of its operational principles, an equivalent circuit model (ECM) based on planar multi-layer structure incorporating both synthetic capacitance and inductance models is proposed. Validation of the proposed absorber is done by measuring the performance of its prototype.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"6 1","pages":"88-97"},"PeriodicalIF":3.5,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10693442","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107070","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

Path Loss Modeling of Wireless Signals in Underground Tunnels 地下隧道中无线信号的路径损耗建模

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-24 DOI: 10.1109/OJAP.2024.3467058

Yaning Li;Baoguo Yu;Lu Huang

{"title":"Path Loss Modeling of Wireless Signals in Underground Tunnels","authors":"Yaning Li;Baoguo Yu;Lu Huang","doi":"10.1109/OJAP.2024.3467058","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3467058","url":null,"abstract":"The environmental characteristics of underground tunnels are very different from those of open spaces. Typical features of underground tunnels (sidewall roughness, metal conductors, tunnel inclinations, etc.) significantly affect signal propagation, making it difficult for a single modeling approach to accurately describe the field strength attenuation of a wireless channel in an underground tunnel. In this paper, a hybrid model describing the propagation attenuation of wireless signals in underground tunnels is proposed, which divides the propagation channel into three subdomains according to the length of the tunnel, namely, the region of the free space propagation model, the region of the multimode propagation described by the ray tracing method, and the region of the improved waveguide model by adding the influences of tunnel roughness, tunnel inclination, and metal pipes. The determination of the breakpoints separating each region depends on the variation of the angle between the arrival direction of the signal ray and the axial direction of the tunnel. The proposed channel model is validated by simulation and experimental measurements, and the results show that the proposed model agrees well with the measured data and outperforms the current most advanced channel propagation fading model, with a 16.2% reduction of model error for the empty straight tunnel, and a 32.0% reduction of model error for the tunnel with metal pipes.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"6 1","pages":"64-74"},"PeriodicalIF":3.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10690171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107073","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

Efficient Synthesis of Large Finite Patch Arrays for Scanning Wide-Angle Anomalous Reflectors 用于扫描广角异常反射镜的大型有限贴片阵列的高效合成

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-24 DOI: 10.1109/OJAP.2024.3466890

Sravan Kumar Reddy Vuyyuru;Risto Valkonen;Sergei A. Tretyakov;Do-Hoon Kwon

引用次数: 0

Advanced Metasurface-Based Antennas: A Review 基于超表面的新型天线研究进展

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-23 DOI: 10.1109/OJAP.2024.3465513

Wanchen Yang;Jinghao Li;Dongxu Chen;Yue Cao;Quan Xue;Wenquan Che

{"title":"Advanced Metasurface-Based Antennas: A Review","authors":"Wanchen Yang;Jinghao Li;Dongxu Chen;Yue Cao;Quan Xue;Wenquan Che","doi":"10.1109/OJAP.2024.3465513","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3465513","url":null,"abstract":"As one kind of two-dimensional metamaterials, metasurface structures are widely applied in antennas due to the special abilities of manipulating the amplitude, phase, polarization states and the propagation modes of electromagnetic wave. This article briefly presents a series of combinations of metasurface and antennas from the perspective of design methods and innovative features, which are divided into three sections: performance improvement, function manipulation and other applications. In the section of performance improvement, three typical applications of metasurface are presented, including using non-periodic metasurfaces to raise aperture efficiency, introducing multi-mode resonance metasurfaces to expand bandwidth, and introducing capacitive loading metasurfaces for miniaturization. As for function manipulation, due to the high design freedom of metasurface, multi-polarization reconfigurability can be achieved by changing the surface impedance distribution. Moreover, it can be used as radiators and excited by traveling wave to achieve beam steering or combined with phase change materials to realize frequency reconfiguration. The last part is about the further applications of metasurface, including multi-folding reflectarray/transmitarray, wide-angle scanning phased array antenna, and filtering antenna. In conclusion, the researches of metasurface have overcome the shortcomings of conventional antennas and proposed some good solutions to realize innovative antennas.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"6 1","pages":"6-24"},"PeriodicalIF":3.5,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10685482","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107123","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

IEEE ANTENNAS AND PROPAGATION SOCIETY IEEE 天线与传播学会

IF 3.5

IEEE Open Journal of Antennas and Propagation Pub Date : 2024-09-23 DOI: 10.1109/OJAP.2024.3459231

引用次数: 0