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Phase Factor Expression for Dual-Deflection Vortex Beams and Verification Through Rubik's Metamaterial 双偏转涡旋光束相位因子表达式及魔方超材料验证
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-12 DOI: 10.1002/mop.70744
Xiaokun Yang, Ju Huang
{"title":"Phase Factor Expression for Dual-Deflection Vortex Beams and Verification Through Rubik's Metamaterial","authors":"Xiaokun Yang,&nbsp;Ju Huang","doi":"10.1002/mop.70744","DOIUrl":"https://doi.org/10.1002/mop.70744","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper introduces quantum photonic factors (<i>e</i><sup>−</sup>ʲᵠ) and combines the generalized Snell's law with orbital angular momentum of vortex waves to derive comprehensive equations describing multi-path deflection of vortex waves. To validate the theoretical framework, the paper designs high-performance Rubik metamaterials operating in the Ku-band. Simulation results demonstrate that the proposed equations accurately characterize the relationships between incident beams, vortex generation, and beam deflection processes.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extremely High Isolation of MIMO Antenna-Based Parasitic Element and U-Slot DGS for 5G V2X Applications 5G V2X应用中基于MIMO天线的寄生元件和u槽DGS的极高隔离性
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-12 DOI: 10.1002/mop.70734
Syaiful Anas Suhaimi, Samir Salem Al-Bawri, Hasliza A. Rahim, Samia Larguech, Md Moniruzzaman, Mohammad Tariqul Islam
{"title":"Extremely High Isolation of MIMO Antenna-Based Parasitic Element and U-Slot DGS for 5G V2X Applications","authors":"Syaiful Anas Suhaimi,&nbsp;Samir Salem Al-Bawri,&nbsp;Hasliza A. Rahim,&nbsp;Samia Larguech,&nbsp;Md Moniruzzaman,&nbsp;Mohammad Tariqul Islam","doi":"10.1002/mop.70734","DOIUrl":"https://doi.org/10.1002/mop.70734","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents an extremely high isolation of a Multiple-Input Multiple-Output (MIMO) antenna incorporating a parasitic element on a U-slot Defected Ground Structure (DGS) for 5G Vehicle-to-Everything (V2X) communication. MIMO antenna was designed using a Rogers RT5880 substrate with a low-profile 1.49 λ ×1.49 λ × 0.031 λ. The antenna operates at 5.9 GHz and exhibits superior isolation characteristics, achieving a mutual coupling level of as low as −48 dB. The design also achieves a high gain of 8.5 dBi, a high bandwidth (5.8–6.08 GHz) of 4.74% and an exceptional radiation efficiency of 98%. The novelty of this work lies in the combined use of a parasitic strip line structure and a U-slot DGS arranged strategically to suppress mutual coupling without increasing the antenna footprint. Both simulated and measured results confirm the proposed antenna's suitability for next-generation 5G V2X systems.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 0.7 to 30 GHz Coplanar Vivaldi Antenna 一个0.7至30ghz共面维瓦尔第天线
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-12 DOI: 10.1002/mop.70739
Jessica Mundell, Johann Wilhelm Odendaal, Johan Joubert, Bennie Jacobs
{"title":"A 0.7 to 30 GHz Coplanar Vivaldi Antenna","authors":"Jessica Mundell,&nbsp;Johann Wilhelm Odendaal,&nbsp;Johan Joubert,&nbsp;Bennie Jacobs","doi":"10.1002/mop.70739","DOIUrl":"https://doi.org/10.1002/mop.70739","url":null,"abstract":"<p>In the literature there are multiple Vivaldi antenna designs that have a wide impedance bandwidth; however, the usable bandwidth is often limited by pattern degradation at the higher frequencies of the band. This paper presents the design and implementation of a coplanar Vivaldi antenna with a 42.9:1 usable bandwidth ratio (0.7–30 GHz). The antenna achieves a VSWR below 2:1 over the band and a maximum gain of 14.1 dBi. To achieve this improved bandwidth a thin low dielectric constant substrate was used, the dielectric was cut away in the flare region of the Vivaldi, and the feed transition and flare profile were optimized. The design was simulated in CST Studio Suite, and a prototype was measured in an anechoic chamber.</p>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mop.70739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753512","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
Active Conjugated Matching Circuit for Bandwidth Enhancement of Electrically-Small Microstrip Antenna 用于微带天线带宽增强的有源共轭匹配电路
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-12 DOI: 10.1002/mop.70738
Yuxuan Zhang, Changjiang Deng, Donghao Li, Xuguang Jin
{"title":"Active Conjugated Matching Circuit for Bandwidth Enhancement of Electrically-Small Microstrip Antenna","authors":"Yuxuan Zhang,&nbsp;Changjiang Deng,&nbsp;Donghao Li,&nbsp;Xuguang Jin","doi":"10.1002/mop.70738","DOIUrl":"https://doi.org/10.1002/mop.70738","url":null,"abstract":"<div>\u0000 \u0000 <p>In this letter, an electrically small microstrip antenna based on active matching is designed for ultra-wideband applications. The passive antenna is printed on a ceramic substrate with a dielectric constant of 10.2. A non-Foster circuit is added to produce negative inductance that can counteract the inductive reactance of the passive antenna. Balun is added to shift the real part of the input impedance to 50 Ω. A prototype of the active microstrip antenna is fabricated with a compact volume of <i>λ</i><sub>L</sub>/20 × <i>λ</i><sub>L</sub>/20 × <i>λ</i><sub>L</sub>/600 (<i>λ</i><sub>L</sub> is the wavelength at the lowest frequency point). The measured −10 dB bandwidth covers the 200–800 MHz range. Compared to the passive microstrip antenna, the proposed active antenna enhances the gain by about 20 dB. The combination of a non-Foster circuit and balun provides great flexibility to achieve wideband performance for electrically small antenna.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wideband Balanced Filtering Circuits With Compact Packaging Based on a Center-Shorted Coupled Three-Line Structure 基于中心短路耦合三线结构的紧凑封装宽带平衡滤波电路
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-12 DOI: 10.1002/mop.70740
Xuedao Wang, Han-Rui Qi, Zai-Cheng Guo, Lingling Wang, Yin-Xi Zhang, Ting-Ting Ning
{"title":"Wideband Balanced Filtering Circuits With Compact Packaging Based on a Center-Shorted Coupled Three-Line Structure","authors":"Xuedao Wang,&nbsp;Han-Rui Qi,&nbsp;Zai-Cheng Guo,&nbsp;Lingling Wang,&nbsp;Yin-Xi Zhang,&nbsp;Ting-Ting Ning","doi":"10.1002/mop.70740","DOIUrl":"https://doi.org/10.1002/mop.70740","url":null,"abstract":"<div>\u0000 \u0000 <p>Wideband balun and balanced bandpass filters (BPFs) are proposed with a differential coupled structure mainly made up of a center-shorted coupled three-line in this letter. By feeding two half-wavelength (<i>λ</i><sub>g</sub>/2) open-circuited lines from opposite terminals and symmetrically coupling their electric fields to a quarter-wavelength (<i>λ</i><sub>g</sub>/4) short-circuited output line, the balun achieves wideband differential-mode (DM) conversion and common-mode (CM) rejection. The conditions for realizing out-of-phase signals with equal amplitude are derived from the impedance matrix of a general six-port coupled three-line structure. A high-selectivity balun BPF is then designed and implemented by extending two differential feeding lines with short-circuited stubs on a two-layer back-to-back microstrip structure with a coupling slot etched in the common ground. Furthermore, a compact balanced BPF with wideband CM suppression is synthesized based on a symmetrical shot-circuited stepped impedance resonator fed by two pairs of differential structures and implemented using broadside coupled stripline. For demonstration, both designed BPFs are fabricated and tested. Results show that both proposed balun and balanced BPFs have compact sizes and nice balance performances.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a 2–6 GHz 100-W Ultra-Wideband Power Amplifier Using Hybrid Integrated Matching Network 基于混合集成匹配网络的2-6 GHz 100-W超宽带功率放大器设计
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-11 DOI: 10.1002/mop.70747
Lingxu Kong, Yuewei Guo, Xiao Lu, Yuan Chu, Peng Li
{"title":"Design of a 2–6 GHz 100-W Ultra-Wideband Power Amplifier Using Hybrid Integrated Matching Network","authors":"Lingxu Kong,&nbsp;Yuewei Guo,&nbsp;Xiao Lu,&nbsp;Yuan Chu,&nbsp;Peng Li","doi":"10.1002/mop.70747","DOIUrl":"https://doi.org/10.1002/mop.70747","url":null,"abstract":"<div>\u0000 \u0000 <p>This study focuses on the design of an ultra-wideband power amplifier targeting high performance, high output power, and low cost. In contrast to conventional 50 Ω internally-matched schemes relying on expensive custom metal-ceramic packages, this letter presents a 2–6 GHz 100 W ultra-wideband gallium nitride (GaN) power amplifier using a hybrid integration approach. Specifically, an in-package pre-matching network within a standard commercial package transforms the low output impedance of the bare die to an intermediate real impedance, while an external Klopfenstein taper on the printed circuit board is utilized to achieve impedance matching from this intermediate impedance to 50 Ω with a compact footprint over an ultra-wide bandwidth. Measurement results demonstrate that the realized power amplifier delivers 50–51 dBm output power, 42%–65% drain efficiency at saturation, and 7.5–11.9 dB gain at 50 dBm output power across the entire 2–6 GHz band under continuous-wave (CW) excitation.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Novel Differential Phase Shift Keying With Non-Differential Demodulation 一种新的非差分解调差分相移键控方法
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-11 DOI: 10.1002/mop.70755
Chenyi Wang, Yang Lu, Yongjian Chen, Yunxin Lv, Meihua Bi
{"title":"A Novel Differential Phase Shift Keying With Non-Differential Demodulation","authors":"Chenyi Wang,&nbsp;Yang Lu,&nbsp;Yongjian Chen,&nbsp;Yunxin Lv,&nbsp;Meihua Bi","doi":"10.1002/mop.70755","DOIUrl":"https://doi.org/10.1002/mop.70755","url":null,"abstract":"<div>\u0000 \u0000 <p>Differential phase shift keying (DPSK) is widely used in optical communication. The demodulation (phase-to- amplitude conversion) of traditional DPSK based on one-bit delay interference will produce a differential result of the origin data. An inverse differential operation is required to recover the origin data, which increases operation complexity, cost and delay. In this paper, a novel DPSK with non-differential demodulation (DPSK-NDD) is proposed. In DPSK-NDD, the signal for modulation is in return-to-zero (RZ) format and the demodulation is based on half-bit delay interference. The demodulated ASK signal is the modulated signal directly. Inverse differential operation is not required, so the operation complexity, cost and delay are all reduced. DPSK-NDD could apply multi-level phases to multiply the bit rate. A multi-level DPSK-NDD signal is demodulated to a multi-level amplitude signal. The feasibility of the proposed DPSK-NDD is verified by the simulated demonstration.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A λ0/3-Spaced Dual-Polarized Rectenna Array: Breaking Conventional Density Limits Through U-Shaped DGSs Integration λ0/3间距双极化整流天线阵列：通过u形dgs集成突破传统密度限制
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-11 DOI: 10.1002/mop.70733
Gang-Young Kim, Dong-Hwan Park, Min-Seong Kim, Wang-Sang Lee
{"title":"A λ0/3-Spaced Dual-Polarized Rectenna Array: Breaking Conventional Density Limits Through U-Shaped DGSs Integration","authors":"Gang-Young Kim,&nbsp;Dong-Hwan Park,&nbsp;Min-Seong Kim,&nbsp;Wang-Sang Lee","doi":"10.1002/mop.70733","DOIUrl":"https://doi.org/10.1002/mop.70733","url":null,"abstract":"<div>\u0000 \u0000 <p>This letter presents a compact dual-polarized rectenna array for 5.8 GHz wireless power transfer (WPT). By integrating U-shaped defected ground structures (DGSs), the inter-element spacing is reduced to λ<sub>0</sub>/3 without degrading radiation performance, breaking the conventional λ<sub>0</sub>/2 limit. The cross-polarized layout provides robust performance against polarization mismatch. Measurements demonstrate approximately 12% higher RF power density per unit area compared to conventional arrays, with stable reception across varying polarization angles. RF power combining reduces rectifier count by 75%. The proposed design is well-suited for space-constrained applications in IoT devices, UAVs, and wireless sensor networks.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a High-Efficiency Class E/F Power Amplifier With Wide Bandwidth 一种高效宽带宽E/F类功率放大器的设计
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-09 DOI: 10.1002/mop.70729
Qi Cai, Xinru Zhuang, Wenquan Che
{"title":"Design of a High-Efficiency Class E/F Power Amplifier With Wide Bandwidth","authors":"Qi Cai,&nbsp;Xinru Zhuang,&nbsp;Wenquan Che","doi":"10.1002/mop.70729","DOIUrl":"https://doi.org/10.1002/mop.70729","url":null,"abstract":"<div>\u0000 \u0000 <p>A novel Class E/F power amplifier (PA) with wide bandwidth is presented in this paper. The proposed approach is used to realize a high-efficiency PA. By introducing an additional shunt capacitance into the original circuit, a harmonic control network is obtained, which satisfies the load impedance requirements of Class E/F PA at odd and even harmonics, while simultaneously matching the fundamental impedances to a 50 Ω load. Experimental verification shows that the fabricated PA achieves a measured drain efficiency (DE) of 67.2%–79.2% in the range of 1.9–3.0 GHz, with an output power of 40.2–43.0 dBm.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase-Controlled Zoned Microwave Heating in a Dual-Port Solid-State-Driven Cavity System 双端口固态驱动腔体系统的相位控制微波加热
IF 1.1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2026-08-04 DOI: 10.1002/mop.70725
Qiang Yang, Baoqing Zeng, Rongjun Liu, Jingrui Duan, Jianlong Liu
{"title":"Phase-Controlled Zoned Microwave Heating in a Dual-Port Solid-State-Driven Cavity System","authors":"Qiang Yang,&nbsp;Baoqing Zeng,&nbsp;Rongjun Liu,&nbsp;Jingrui Duan,&nbsp;Jianlong Liu","doi":"10.1002/mop.70725","DOIUrl":"https://doi.org/10.1002/mop.70725","url":null,"abstract":"<div>\u0000 \u0000 <p>Traditional microwave heating systems generally suffer from limited spatial controllability, making selective heating of different regions inside a resonant cavity difficult. To address this limitation, a dual-port solid-state microwave heating system based on phase-controlled phased-array technology for zoned microwave heating is proposed. A pair of inverted-F antennas was employed to generate controllable electromagnetic field distributions by adjusting the phase difference between the two excitation ports. An electromagnetic simulation model was established to investigate the phase-dependent field distribution, followed by thermal simulations and experimental validation using water loads under different loading conditions. Both the simulation and experimental results demonstrated that varying the phase difference effectively redistributed the microwave energy within the cavity, enabling multiple zoned-heating modes and directional heating with good agreement between the simulation and measurements. The proposed architecture provides an effective and relatively low-complexity solution for controllable microwave zoned heating and offers a practical approach for future intelligent microwave heating systems.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"68 8","pages":""},"PeriodicalIF":1.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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