International Journal of RF and Microwave Computer-Aided Engineering最新文献

Design and Performance Analysis Comparison of a DWDM Optical Communication Network With and Without EDFA and LCFBG for High Data Rate Transmissions 用于高数据速率传输的DWDM光通信网络设计与性能分析比较

IF 1 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-08-03 DOI: 10.1155/mmce/4008918

S. Maria Seraphin Sujitha, Kannan Pauliah Nadar

{"title":"Design and Performance Analysis Comparison of a DWDM Optical Communication Network With and Without EDFA and LCFBG for High Data Rate Transmissions","authors":"S. Maria Seraphin Sujitha, Kannan Pauliah Nadar","doi":"10.1155/mmce/4008918","DOIUrl":"https://doi.org/10.1155/mmce/4008918","url":null,"abstract":"Wavelength division multiplexing (WDM) technology is widely used in high-capacity optical communication systems, enabling the simultaneous transmission of multiple signals over optical fiber. However, signal attenuation and dispersion pose significant challenges to long-distance optical transmission. To mitigate these effects, this study investigates the performance of a four-channel dense wavelength division multiplexing (DWDM) network with and without the use of an erbium-doped fiber amplifier (EDFA) and linear chirped fiber Bragg grating (LCFBG). In the absence of EDFA and LCFBG, the signal quality factor (QF) deteriorates as the bit rate increases, with a marked degradation at higher transmission speeds. Our results show that the introduction of EDFA significantly reduces the bit error rate (BER) and improves the QF. Moreover, combining EDFA with LCFBG provides superior performance, effectively compensating for dispersion and attenuation across various transmission distances (0.5, 1, 1.5, and 2 km) and data rates (2, 5, 8, 10, 15, and 20 Gbps). The combination of EDFA and LCFBG outperforms other configurations in terms of signal quality, with a notable improvement in the QF and overall system reliability. These findings suggest that the integrated use of EDFA and LCFBG is an effective solution for enhancing the performance of DWDM systems, especially for long-haul, high-capacity optical transmission.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/4008918","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Subgigawatt Level X-Band BWO Using Adiabatically Tapered SWS at Low Magnetic Field 低磁场下绝热锥形SWS的亚千兆瓦级x波段BWO

IF 1 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-07-31 DOI: 10.1155/mmce/9618627

Chitaranjan Jadab, Romesh Chandra, Sandeep Singh, Amitava Roy

{"title":"Subgigawatt Level X-Band BWO Using Adiabatically Tapered SWS at Low Magnetic Field","authors":"Chitaranjan Jadab, Romesh Chandra, Sandeep Singh, Amitava Roy","doi":"10.1155/mmce/9618627","DOIUrl":"https://doi.org/10.1155/mmce/9618627","url":null,"abstract":"Improving the efficiency of backward wave oscillators (BWOs) operating in a low magnetic field regime remains a significant research challenge. In this field regime, increased transverse motion of electrons leads to variable interaction impedance. Consequently, the beam wave synchronization with the desired mode is disrupted, resulting in reduced efficiency. To partially overcome this challenge, an adiabatically varying nonuniform slow wave structure (SWS) with a circular ridged wall profile is proposed. The SWS helps in maintaining the synchronization of the beam bunch with the desired normal mode throughout the interaction length. The circular SWS increases the field breakdown limit of the electrodynamic structure. This, in turn, results in an average output power of 810 MW at 9.8 GHz with a power increment of 50% compared to the uniform SWS, guided by a 0.6 T magnetic field. The low magnetic field operation helps in the implementation of a permanent magnet, which results in a repetitive microwave system. The novelty of this work lies in the use of an adiabatically tapered, nonuniform SWS geometry to ensure continuous synchronism at low magnetic fields, which is rarely addressed in conventional BWO designs. This method offers practical significance in reducing system size, weight, and cost by eliminating bulky electromagnets. Further efficiency enhancement is limited by overbunching, which induces Coulomb instability and leads to back-streaming of electrons, as observed in particle-in-cell simulation conducted using CST Microwave Studio.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/9618627","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144751436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective Manipulation of Microwaves by a Cascade of Independent Metasurfaces Based on Planar Spirals 基于平面螺旋的独立超表面级联对微波的选择性操纵

IF 1 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-07-30 DOI: 10.1155/mmce/2346639

Ivan Fanyaev, Andrei Samofalov, Alexander Kravchenko, Dazhi Ding, Mengmeng Li, Igor Semchenko, Sergei Khakhomov, Ihar Faniayeu

{"title":"Selective Manipulation of Microwaves by a Cascade of Independent Metasurfaces Based on Planar Spirals","authors":"Ivan Fanyaev, Andrei Samofalov, Alexander Kravchenko, Dazhi Ding, Mengmeng Li, Igor Semchenko, Sergei Khakhomov, Ihar Faniayeu","doi":"10.1155/mmce/2346639","DOIUrl":"https://doi.org/10.1155/mmce/2346639","url":null,"abstract":"We propose a multifunctional cascade metasurface designed for manipulating electromagnetic waves in the microwave frequency range with comprehensive theoretical analysis, design optimization, and experimental validation. A set of electrically thin metasurfaces based on planar spirals with free space impedance is used to manipulate electromagnetic waves. The metasurfaces simultaneously generate distinct, independent, and mutually compatible wave transformations at various frequencies. A multifunctional cascade metasurface integrates several functional devices, including a reflective cross-polarizer, a transmissive cross-polarizer, and a nonreflective absorber. Each designed metasurface has a free space impedance over a sufficiently wide frequency range that encompasses the operating frequencies of all metasurfaces. This attribute guarantees the autonomous and mutually noninterfering functioning of all metasurfaces in the cascade.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/2346639","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 Interdigital-Coupled Microstrip Line Bandpass Filters in the 28 and 38 GHz 28 GHz和38 GHz间数耦合微带线带通滤波器的设计

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-07-29 DOI: 10.1155/mmce/9859221

Ming-An Chung, Chia-Wei Lin, Bing-Ruei Chuang

引用次数: 0

A Quad-Fed Triband Circularly Polarized Patch Antenna Based on Three Resonant Modes 基于三种谐振模式的四馈三带圆极化贴片天线

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-07-28 DOI: 10.1155/mmce/7868805

Chang-Feng Liang, Fang Yuan, Bao-Guang Liu, Yun-Peng Lyu

{"title":"A Quad-Fed Triband Circularly Polarized Patch Antenna Based on Three Resonant Modes","authors":"Chang-Feng Liang, Fang Yuan, Bao-Guang Liu, Yun-Peng Lyu","doi":"10.1155/mmce/7868805","DOIUrl":"https://doi.org/10.1155/mmce/7868805","url":null,"abstract":"A quad-fed triband circularly polarized (CP) patch antenna based on three resonant modes is proposed in this paper. This antenna consists of a square patch loaded with an open cross slots, two pairs of arc slots, and four shorting pins. The acquisition of the three bands is attributed to the simultaneous excitation of TM11 mode of circular patch, TM10 mode of square patch, and the one-wavelength cross slot mode. The TM11 mode of circular patch is excited by the cooperation of the arc slots and the shorting pins, while the loading of the open cross slot moves the TM10 and TM21 modes of the square patch to a higher frequency. Furthermore, the introduction of the arc slots improves the impedance matching of the one-wavelength cross slot mode. The equivalent circuit of the proposed quad-fed patch antenna is established, and its validity is verified. For implementing CP radiation with the same sense in all three bands, a sequential phase feed network is designed and cooperated with the antenna. In order to verify the design concept, an antenna prototype is fabricated and measured. The measured results show that the VSWR is less than 2 in 2.54–5.5 GHz, which can cover the three frequency bands of the proposed antenna. The AR bandwidths in three bands are 33.1%, 27.6%, and 8.6%, respectively. The peak RHCP gains in the three bands are 5, 9.9, and 4.1 dBic, respectively. The profile is 0.032λ0 (λ0 is the wavelength in the free space at 3.2 GHz).","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/7868805","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 Triple-Band Slotted Planar Antenna for WLAN/WiMAX and 5G Applications 面向WLAN/WiMAX和5G应用的三频带开槽平面天线设计

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-07-24 DOI: 10.1155/mmce/9919578

Lalit Kumar, Anil Kumar Gautam

{"title":"Design of Triple-Band Slotted Planar Antenna for WLAN/WiMAX and 5G Applications","authors":"Lalit Kumar, Anil Kumar Gautam","doi":"10.1155/mmce/9919578","DOIUrl":"https://doi.org/10.1155/mmce/9919578","url":null,"abstract":"This paper presents a new small, low-profile planar triple-band microstrip antenna for WLAN/WiMAX and 5G applications. Nowadays, various wireless services are being integrated into a single device, so these devices require multiband resonant antennas to maintain their compact and portable size. Therefore, the aim of current research was to combine WLAN WiMAX and 5G communication standards together into a single wireless device by designing an antenna that can stimulate triple-band operation. The proposed antenna consists of circular-shaped rectangular slotted radiator encircled by a rectangular ring and a defected ground plane. The designed antenna has a compact size of 20 × 32 mm2 (0.16λ0 × 0.256λ0). The optimum dimensions were obtained using parametric studies of the key parameters of the antenna. The proposed antenna offers three different bands—I 2.3–2.70, II 3.2–3.92, and III 5.1–5.9 GHz, which clearly covers the entire WLAN (2.4/5.2/5.8 GHz), WiMAX (2.5/3.5/5.5), and 5G bands. Finally, a proposed antenna was built and studied experimentally to verify the design concept as well as validate the simulation results. The good agreement of the simulation results with the measured results proved that the antenna can simultaneously operate on WLAN (2.4/5.2/5.8 GHz), WiMAX (2.5/3.5/5.5 GHz), and 5G frequency bands. This antenna is a suitable candidate for a device that can be used for these three services simultaneously.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/9919578","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144688036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Manifold Frequency Division Multiplexer With Narrowband SIW–SSPP Hybrid Filters 窄带SIW-SSPP混合滤波器的流形频分多路复用器

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-07-01 DOI: 10.1155/mmce/3609689

Yasong Wang, Zeyuan Lv, Zhaolin Li, Xianzhong Tian, Yevhen Yashchyshyn, Yanpeng Shi, Qinglei Guo, Aimin Song, Yifei Zhang

{"title":"Manifold Frequency Division Multiplexer With Narrowband SIW–SSPP Hybrid Filters","authors":"Yasong Wang, Zeyuan Lv, Zhaolin Li, Xianzhong Tian, Yevhen Yashchyshyn, Yanpeng Shi, Qinglei Guo, Aimin Song, Yifei Zhang","doi":"10.1155/mmce/3609689","DOIUrl":"https://doi.org/10.1155/mmce/3609689","url":null,"abstract":"A manifold-coupled multiplexer comprising substrate integrated waveguide (SIW)–spoof surface plasmon polariton (SSPP) hybrid filters and a microstrip line network is proposed for Ka-band applications, achieving a compact profile and low insertion loss. The narrowband hybrid filter is designed by converging the cut-off frequencies of SIWs and SSPPs, which may avoid the high-order modes of the resonant filters, and two SSPP slots are chosen for filter miniaturization without significantly sacrificing the cut-off response. A short taper is designed to connect the hybrid filter and microstrip lines, and the microstrip line network is carefully optimized to match the manifold phase configuration with a compact size. A prototype is fabricated and characterized for demonstration. The experimental insertion loss is 2.10, 2.49, and 2.61 dB at 28.2, 29.7, and 31.2 GHz, respectively, and the corresponding 3 dB bandwidth is 4.1%, 4.7%, and 4.8%, respectively, showing a good match with the simulation. The reflection loss is larger than 10 dB from 27.8 to 31.4 GHz. Considering the promising out-of-band rejection of the hybrid filters, such a configuration should be suitable for multiplexers with large channel numbers and may find many applications in ultra-wideband and multifunctional communication systems.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/3609689","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144520092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Compact Millimeter-Wave Antenna Array With Low Sidelobe Level for Vital Sign Monitoring Application” “用于生命体征监测的低旁瓣电平紧凑型毫米波天线阵列”的勘误表

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-06-13 DOI: 10.1155/mmce/9891580

引用次数: 0

Power Efficiency Improvement for Dual–Dielectric Resonator Oscillators 双介质谐振振荡器的功率效率改进

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-05-18 DOI: 10.1155/mmce/6052612

Sam Moeini, Mahmoud Shahabadi, Arash Dana

{"title":"Power Efficiency Improvement for Dual–Dielectric Resonator Oscillators","authors":"Sam Moeini, Mahmoud Shahabadi, Arash Dana","doi":"10.1155/mmce/6052612","DOIUrl":"https://doi.org/10.1155/mmce/6052612","url":null,"abstract":"A dual–dielectric resonator oscillator (DDRO) was previously introduced as a promising configuration for wireless power transfer (WPT), achieving a wireless power level of 13.07 dBm with a DC-to-RF efficiency of 19.50%. This work presents the design, simulation, and implementation of a single-port WPT system employing a parallel-feedback DDRO for increasing the output power level. The design incorporates a 7.5-GHz oscillator network featuring a class AB common-source power amplifier transistor integrated with a dielectric resonator (DR)–based WPT. By utilizing a parallel-feedback oscillator circuit, which enables efficient impedance matching through load-pull analysis and eliminates the need for a lossy termination at the end of the feed line, and optimizing the coupling structure for the transmitter DR, the output power level and the DC-to-RF conversion efficiency have been significantly improved. The implemented circuit delivers a measured wireless power level of 14.83 dBm, showing an improvement of approximately 2 dB, with a DC-to-RF efficiency of 36.85% at 7.5 GHz, while maintaining a transmission bandwidth of 150 MHz. This capability facilitates simultaneous transmission of both power and data over a single channel. The paper also presents an accurate model for design purposes and demonstrates validity of the model using our measurement results.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2025 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/mmce/6052612","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144085312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compact Dual-Band Band-Pass Filter Using Single Multimode SIW Cavity With Independent Controllable Fractional Bandwidth 采用独立可控分数带宽的单模SIW腔的紧凑双带带通滤波器

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2025-04-26 DOI: 10.1155/mmce/9968988

Ch. Suresh Kumar, Runa Kumari, Harish V. Dixit

引用次数: 0