Frequenz最新文献_第8页

Frontmatter 头版头条

4区工程技术

Frequenz Pub Date : 2023-05-01 DOI: 10.1515/freq-2023-frontmatter5-6

引用次数: 0

Effects of ground plane on a square graphene ribbon patch antenna designed on a high-permittivity substrate with PBG structures 接地平面对在高介电常数PBG结构衬底上设计的方形石墨烯带状贴片天线的影响

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-04-20 DOI: 10.1515/freq-2022-0149

A. Bendaoudi, M. Berka, Mohamed Debab, Z. Mahdjoub

引用次数: 0

Design of a compact metamaterial absorber with wide angular stability and polarisation insensitive for C, X and broad Ku band applications 一种适用于C、X和宽Ku波段应用的具有宽角度稳定性和偏振不敏感的紧凑超材料吸收器的设计

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-04-17 DOI: 10.1515/freq-2022-0158

Vishal Puri, H. Singh

{"title":"Design of a compact metamaterial absorber with wide angular stability and polarisation insensitive for C, X and broad Ku band applications","authors":"Vishal Puri, H. Singh","doi":"10.1515/freq-2022-0158","DOIUrl":"https://doi.org/10.1515/freq-2022-0158","url":null,"abstract":"Abstract The article presents the design and development of a metamaterial-based microwave absorber having polarisation insensitivity, broad angle of incidence, low profile, and compactness in the microwave frequency range. The unit cell focuses to achieve maximum absorption at C-, X- and broad Ku-bands. The structure is simulated and the results are analysed for different angles of polarisation and angle of incidence. The dimension of the proposed structure is ultrathin and compact having an overall dimension of 8 mm × 8 mm × 0.8 mm. The dimensions are optimized in such a fashion to achieve three different peaks at three different bands thereby making the triple-band behaviour of the metamaterial absorber possible. The structure is providing absorption of 99.14% absorption at 6.08 GHz (C-Band) while absorption of 98.29% is achieved at 9.49 GHz (X-band) and 265 MHz bandwidth with above 95% absorption from 16.57 GHz to 16.83 GHz (Ku-Band) in the microwave regime. The absorber patch is a composition of square ring patches and a central square ring annexed with triangles on four sides, the split ring providing a combinational effect witnessing the desired absorption at designated frequencies. The unit cell dimension at a lower cut-off frequency is 0.162 λlowest. The proposed structure is verified for polarisation sensitivity and has a wide angle of incidence. The structure is experimentally verified for results and is found to be in close agreement with simulated ones. The compactness of structure with the attainment of the highest form of absorption in different bands including the 265 MHz high absorption band provides the scope of applicability in various engineering applications at microwave regimes.","PeriodicalId":55143,"journal":{"name":"Frequenz","volume":"77 1","pages":"347 - 356"},"PeriodicalIF":1.1,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43665632","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

Compact dual-band narrowband bandpass filter with small frequency ratio 紧凑的双频窄带带通滤波器，频率比小

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-04-06 DOI: 10.1515/freq-2022-0272

Shangjing Xi, Jianying Guo, Yannan Jiang, K. Xu

引用次数: 1

Dual-layer microstrip monopolar patch antenna with characteristic mode analysis 带特征模分析的双层微带单极贴片天线

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-04-03 DOI: 10.1515/freq-2022-0230

Shu Jiang, Hengfei Xu, Jiangling Dou, Dongquan Sun

引用次数: 0

SIW-cavity based frequency reconfigurable antenna for IoT, WLAN, and 5G applications 用于物联网、WLAN和5G应用的基于SIW腔的频率可重构天线

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-03-23 DOI: 10.1515/freq-2022-0173

Babu Lal Sharma, Dhirendra Mathur, M. Sharma

{"title":"SIW-cavity based frequency reconfigurable antenna for IoT, WLAN, and 5G applications","authors":"Babu Lal Sharma, Dhirendra Mathur, M. Sharma","doi":"10.1515/freq-2022-0173","DOIUrl":"https://doi.org/10.1515/freq-2022-0173","url":null,"abstract":"Abstract In order to minimize antenna complexity and improve gain, a new compact size low profile SIW-cavity-based frequency reconfigurable antenna is presented for IoT, WLAN, and 5G applications. The proposed antenna miniaturization is achieved by incorporating SIW cavity using metallic vias. The reconfiguration mechanism is accomplished by etching a circular ring slot and a C-shaped slot at the top metallic layer of the substrate. The frequency switching mechanism from low to high state is provided by eight PIN diodes. The diodes are placed in a symmetrical order along circular ring slot. All the diodes are switched on simultaneously to achieve low-frequency state operation. However, the off state of the diodes shifts antenna operation from low to high-frequency state. The antenna is fabricated on a small size substrate with an overall electrical size of (0.4λ* 0.4λ).The proposed antenna resonates at frequencies 2.4, and 3.45 GHz with 220 MHz and 470 MHz bandwidth respectively in low-frequency state. In high-frequency state, the antenna resonates at 5.8 GHz with 200 MHz bandwidth. The proposed antenna achieves peak gain of 6.3, 6.7, and 5.9 dBi in the three bands, and stable radiation patterns are attained in the working frequency band of the antenna.","PeriodicalId":55143,"journal":{"name":"Frequenz","volume":"77 1","pages":"413 - 424"},"PeriodicalIF":1.1,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48281145","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: 1

Frontmatter 头版头条

4区工程技术

Frequenz Pub Date : 2023-03-06 DOI: 10.1515/freq-2023-frontmatter3-4

引用次数: 0

SMCG research on electromagnetic scattering in arid area 干旱区电磁散射的SMCG研究

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-03-06 DOI: 10.1515/freq-2022-0108

F. Jiang

{"title":"SMCG research on electromagnetic scattering in arid area","authors":"F. Jiang","doi":"10.1515/freq-2022-0108","DOIUrl":"https://doi.org/10.1515/freq-2022-0108","url":null,"abstract":"Abstract This article is devoted to the study of electromagnetic scattering characteristics in arid areas, and proposes environmental monitoring and improvement methods. A four-component soil dielectric model was established to study the relationship of soil dielectric constant with soil moisture and frequency. As the Monte Carlo Method combined with Gaussian spectral function was used to simulate the actual dry ground, the Sparse Matrix/Canonical Grid (SMCG) algorithm model based on the surface current equation was established to calculate the electromagnetic scattering coefficient of arid areas. To verify the correctness of the proposed algorithm, the results obtained by SMCG was compared with those calculated by Method of Moments (MOM), which showed great consistency. Many results were obtained by using the algorithm in this paper, based on the measured soil data in the southeastern area of Ejin Banner, Inner Mongolia. It was found that soil moisture content, area roughness and incident electromagnetic wave segment had influence on the scattering echo and showed regular change. The results of this paper are of guiding significance for soil moisture monitoring, desertification control and agricultural planting in arid areas.","PeriodicalId":55143,"journal":{"name":"Frequenz","volume":"77 1","pages":"337 - 345"},"PeriodicalIF":1.1,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46414701","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

Mutual coupling reduction with Peyton Turtle pattern nearfield surface for MIMO patch antenna MIMO贴片天线Peyton-Turtle模式近场表面的互耦抑制

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-02-21 DOI: 10.1515/freq-2022-0150

Alireza Omidvar, P. Rezaei, E. Atashpanjeh

引用次数: 0

A corrugated and lens based miniaturized antipodal Vivaldi antenna for 28 GHz and 38 GHz bands applications 一种用于28 GHz和38 GHz频带应用的波纹和透镜微型对足维瓦尔第天线

IF 1.1 4区工程技术

Frequenz Pub Date : 2023-02-20 DOI: 10.1515/freq-2022-0199

Amruta S. Dixit, Sumit Kumar, M. Abegaonkar

{"title":"A corrugated and lens based miniaturized antipodal Vivaldi antenna for 28 GHz and 38 GHz bands applications","authors":"Amruta S. Dixit, Sumit Kumar, M. Abegaonkar","doi":"10.1515/freq-2022-0199","DOIUrl":"https://doi.org/10.1515/freq-2022-0199","url":null,"abstract":"Abstract The paper presents a dualband and compact antipodal Vivaldi antenna (AVA) array by using a dielectric lens (DL) and corrugations for 5G applications. The proposed novel antenna provides very high efficiency and it alleviates beam titling very effectively. Its efficiency is in the range of 95.93%–97.52% whereas the H plane beam titling is ± 1 ° $pm 1{}^{circ}$ over most of the frequency range. The antenna frequency response is improved by incorporating corrugations which results in the antenna miniaturization. The designed AVA array size is 2.86 × 3.58 × 0.06 λ g 3 ${{lambda }_{g}}^{3}$ (for lower guided frequency). The proposed dualband antenna operates from 24.17 GHz to 29.37 GHz and 30.76 GHz to 40.58 GHz. These frequency bands cover 28 GHz and 38 GHz bands of 5G communications. Next, the front-to-back ratio is improved significantly which further results in the gain enhancement. Also, the grooves in the feeding network minimize reverse power reflections. The radiation pattern is stable and it shows that the designed antenna is a directional antenna. The antenna is designed, simulated, and tested by using a network analyzer and anechoic chamber. The testing and simulated results indicate that the proposed AVA array is the best candidate to integrate it in 5G devices.","PeriodicalId":55143,"journal":{"name":"Frequenz","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47372527","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