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2017 Conference on Microwave Techniques (COMITE)最新文献

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Design of broadband antenna system for automatic dependent surveillance - broadcast 自动相关监视广播宽带天线系统的设计
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932365
Tomas Hnilicka, T. Zálabský, V. Krcmar
{"title":"Design of broadband antenna system for automatic dependent surveillance - broadcast","authors":"Tomas Hnilicka, T. Zálabský, V. Krcmar","doi":"10.1109/COMITE.2017.7932365","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932365","url":null,"abstract":"This paper deals with a design of a broadband patch antenna element for an ADS-B (Automatic Dependent Surveillance - Broadcast) system. An ADS-B system works on the frequencies of 1030 MHz and 1090 MHz. In this paper two types of patch antenna radiating elements have been described. An antenna synthesis of four radiating elements to obtain a higher system gain and better space coverage was performed. The paper contains a comparison between a numerical model in Matlab software, a computer model simulation in a CST Microwave Studio and a fabricated component.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116247430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Low-cost planar coupled-line sensor for permittivity measurement of low-loss dielectric materials in a wide frequency range 用于宽频率范围内低损耗介质材料介电常数测量的低成本平面耦合线传感器
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932363
I. Piekarz, K. Janisz, J. Sorocki, K. Wincza, S. Gruszczynski
{"title":"Low-cost planar coupled-line sensor for permittivity measurement of low-loss dielectric materials in a wide frequency range","authors":"I. Piekarz, K. Janisz, J. Sorocki, K. Wincza, S. Gruszczynski","doi":"10.1109/COMITE.2017.7932363","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932363","url":null,"abstract":"This paper presents novel non-destructive method for dielectric sample characterization in a wide frequency range. Recently proposed sensors based on differentially excited shortended coupled-line section has been used to determine the permittivity of an unknown dielectric sample. A simplified calibration and calculation procedure is proposed in the presented approach while maintaining a good measurement accuracy. Since the sample permittivity is obtained based on the measurement of the odd-mode effective permittivity, which is mainly related to the mutual capacitance between coupled strips, high sensitivity on the covering sample is achieved. The proposed measurement technique has been theoretically investigated and experimentally verified. A good agreement between predicted and obtained from measurement results has been obtained in a wide frequency range up to 7 GHz with percent error not greater than ± 5%.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128822839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two-port measurement system with coupled-line sensor for detection of material permittivity change 双端口耦合线传感器测量系统，用于检测材料介电常数变化
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932362
I. Piekarz, J. Sorocki, K. Wincza, S. Gruszczynski
{"title":"Two-port measurement system with coupled-line sensor for detection of material permittivity change","authors":"I. Piekarz, J. Sorocki, K. Wincza, S. Gruszczynski","doi":"10.1109/COMITE.2017.7932362","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932362","url":null,"abstract":"A novel method of dielectric sample detection utilizing two-port microwave system with coupled-line sensor has been presented. The proposed measurement setup is composed of two identical baluns and differentially-excited coupled-line sensor in-between which can be covered with an unknown material. The setup has been theoretically analyzed and formulas allowing for calculation of sensor-sample effective permittivity have been derived along with simplified calibration procedure. The method allows for detection of significantly small dielectric sample having minimal size comparable with separation between sensor’s coupled strips. The presented approach has been theoretically and experimentally investigated. The obtained results prove the usefulness of the proposed technique.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132114641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atmospheric attenuation analysis using aldo- Alphasat beacon signal in Prague 布拉格使用aldo- Alphasat信标信号进行大气衰减分析
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932356
V. Pek, O. Fiser
{"title":"Atmospheric attenuation analysis using aldo- Alphasat beacon signal in Prague","authors":"V. Pek, O. Fiser","doi":"10.1109/COMITE.2017.7932356","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932356","url":null,"abstract":"In this contribution we describe selected attenuation events recorded by the \"Alphasat\" satellite receiver at the Institute of Atmospheric Physics (IAP) in Prague. First of all we compare the attenuation course and the rain rate course - good correlation was acknowledged. Also the cumulative distribution of attenuation for September 2015 and more months together (September - June, 2016) is demonstrated. Some selected rain attenuation prediction methods were used to compare measured and computed attenuation which is, in fact, caused by rain mainly. We added frequency scaling description and test of the ITU-R scaling method of quite good result related to peak attenuation values.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133993084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
3D-textile integrated corrugated horn antenna 3d纺织品集成波纹喇叭天线
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932312
J. Vélim, Ondřej Jaroš, M. Mrnka
{"title":"3D-textile integrated corrugated horn antenna","authors":"J. Vélim, Ondřej Jaroš, M. Mrnka","doi":"10.1109/COMITE.2017.7932312","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932312","url":null,"abstract":"The paper describes a corrugated substrate integrated horn antenna designed for surface wave excitation in the UWB band groups 3, 4, 5 and 6 (6-10 GHz). The antenna is optimized for integration into 3.4 mm thick textile of relative permittivity of 1.2. The corrugated substrate integrated waveguide is fed by a microstrip line and for connectivity a transition from microstrip line to coaxial line is designed. In order to enhance the impedance matching, we utilize thin strip lines placed in front of the aperture. The directivity of the antenna is 12.5 dBi at the 8 GHz and the antenna efficiency is about 70 %.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131685128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Dual slot-superstrate terahertz antenna without Si-lens 无硅透镜的双槽层太赫兹天线
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932357
J. Frydrych, J. Petrzela, K. Pítra
{"title":"Dual slot-superstrate terahertz antenna without Si-lens","authors":"J. Frydrych, J. Petrzela, K. Pítra","doi":"10.1109/COMITE.2017.7932357","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932357","url":null,"abstract":"Design study is presented concerning the structure of dual slot - superstrate antennas operating at 1 THz for signal sources LT-GaAs photomixer. The antenna directivity is strong enough to remove Si lens from the conventional THz emitter. The input impedance of the antenna was matched to the impedance of the photomixer to achieve high output power. The designed structure was verified by simulations in CST Microwave Studio.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134014488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Transition adapters for 3D textile substrates 用于3D纺织基板的转换适配器
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932358
M. Cupal, Z. Raida, J. Vélim
{"title":"Transition adapters for 3D textile substrates","authors":"M. Cupal, Z. Raida, J. Vélim","doi":"10.1109/COMITE.2017.7932358","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932358","url":null,"abstract":"The paper presents transition adapters to be used between conventional RF connectors (SMA, 2.92 mm, etc.) and 3D textile transmission lines (microstrips at 5.8 GHz and textile integrated waveguides at 8 GHz). Proposed transitions could be used for other multilayer structures. The insertion losses of designed transition adapters are lower than 0.6 dB. The transition adapters are suitable for the excitation of antennas integrated into 3D textile substrates or similar textile materials.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Design of coaxial cavity for high power magnetron 大功率磁控管同轴腔的设计
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932354
M. Joshi, S. Vyas, T. Tiwari, R. Bhattacharjee
{"title":"Design of coaxial cavity for high power magnetron","authors":"M. Joshi, S. Vyas, T. Tiwari, R. Bhattacharjee","doi":"10.1109/COMITE.2017.7932354","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932354","url":null,"abstract":"This paper presents electromagnetic design of coaxial cavity for high power X-band coaxial magnetron. The initial dimensions of the cavity have been calculated by solving transcendental equation using graphical method. The eigenmode simulation has been carried out by using CST MW Studio. It is found that TE011 mode occurs at 9.3 GHz. Output coupler of cavity is designed to launch RF power into WR112. Proposed design is analyzed in terms of performance parameters i.e., unloaded, loaded, and external quality factors. Circuit efficiency and coupling coefficient are analyzed by varying critical geometrical parameters. Unloaded Q factor of 13108 is achieved for circuit efficiency of 93%.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121585235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Frequency selective surface with wide range of tunability 频率选择面，可调范围广
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932301
B. Doken, M. Kartal
{"title":"Frequency selective surface with wide range of tunability","authors":"B. Doken, M. Kartal","doi":"10.1109/COMITE.2017.7932301","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932301","url":null,"abstract":"Recent communication systems demand multifunctional frequency selective surfaces (FSSs) which have more than one frequency response. As a solution proposal, a novel band stop periodic element geometry which can be tuned between 1.8 GHz-5.8 GHz frequency bands is presented in this work. Trapezoid loop geometry is used as an FSS geometry in order to achieve wide tuning range. Tuning feature is achieved by inclusion of varactor diodes between trapezoid loop geometries. Proposed structure allows independent tuning for vertical and horizontal polarizations. Analyzes of the proposed surfaces are executed with Ansoft HFSS v.15 software.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122830078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Planar composite right/left-handed leaky-wave antenna featuring dual beam 双波束平面复合左/右漏波天线
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932313
I. Slomian, K. Wincza, S. Gruszczynski
{"title":"Planar composite right/left-handed leaky-wave antenna featuring dual beam","authors":"I. Slomian, K. Wincza, S. Gruszczynski","doi":"10.1109/COMITE.2017.7932313","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932313","url":null,"abstract":"A novel single-layer leaky-wave antenna utilizing composite right/left-handed transmission-line sections has been proposed. The proposed antenna is a 1-D periodic structure composed of identical unit cells. Each unit cell is constituted by a quasi-distributed series capacitance and two open stubs at opposite sides of a unit cell. The unique feature of this antenna is that main beam is scanned in one of the principal cut-planes from back-fire through broadside to end-fire, whereas in the other principal cut-plane the main beam is scanned as well, having different scanning angles in left-handed and right-handed regions. The design, simulation and measurement results of a proposed antenna operating at approximately 5-5.6 GHz are presented showing interesting features of the antenna.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"215 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122035848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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