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2019 Conference on Microwave Techniques (COMITE)最新文献

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Design of a Triangular Slotted Parasitic Yagi-Uda Antenna for Underwater Linear Sensor Network 用于水下线性传感器网络的三角开槽寄生Yagi-Uda天线设计
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733431
A. Dala, T. Arslan, Imran M. Saied
{"title":"Design of a Triangular Slotted Parasitic Yagi-Uda Antenna for Underwater Linear Sensor Network","authors":"A. Dala, T. Arslan, Imran M. Saied","doi":"10.1109/COMITE.2019.8733431","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733431","url":null,"abstract":"The underwater channel is a highly random and unpredictable medium for signal transmission. Acoustic signals, even though are successful in travelling long distances in seawater, have limitation in terms of bandwidth and speed. Optical signals are limited by the muddiness of the seawater. For radio frequency (RF), high concentration of salt in seawater means it is highly dispersive. Nonetheless, the use of RF provides high bandwidth and low latency capabilities which are essential for a high data rate and real-time telemetry system. The antenna is an essential part of any RF system, thus its design is of utmost importance. In building an underwater linear sensor network, the antenna would have to be directional with high gain because of the losses associated with the seawater. In this work, we have proposed a novel Yagi-Uda antenna with slotted triangular parasitic element. Simulations were performed using CST. A fractional bandwidth of 30% was achieved with good reflection coefficient of -24 dB.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115281232","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 an Electronically Steered Antenna Array in the X band X波段电子制导天线阵列的设计
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733593
Ondřej Jaroš, L. Beran
{"title":"Design of an Electronically Steered Antenna Array in the X band","authors":"Ondřej Jaroš, L. Beran","doi":"10.1109/COMITE.2019.8733593","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733593","url":null,"abstract":"Nowadays, unmanaged aerial vehicles (UAVs) are rapidly expanding to commercial or public sector. These vehicles, called drones, should be very dangerous, in case of collision with planes. Typical primary surveillance radars are not able to detect because radar cross section (RCS) of UAVs is out of resolution of the radar. It is necessary to develop new type of radar to detect and localize these small UAVs. Our project is focused on development of the new type of radar able to detect these UAVs. The paper deals part of our project, analysis and design of the new type of transmitter electronically steered array for FMCW radar, using phased array antenna in the X band. Finally, the designed array and it´s simulations using ASA Radom are presented.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116714887","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
Possibilities of Using the Modified Equivalent Temperature Gradient for a Turbulent Atmosphere 紊流大气使用修正等效温度梯度的可能性
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733453
L. Hudcová, O. Wilfert
{"title":"Possibilities of Using the Modified Equivalent Temperature Gradient for a Turbulent Atmosphere","authors":"L. Hudcová, O. Wilfert","doi":"10.1109/COMITE.2019.8733453","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733453","url":null,"abstract":"This work is focused on the modified method of Equivalent Temperature Gradient which can determine instantaneous strength of the atmospheric turbulence. Origin of the method is presented and modified Equivalent Temperature Gradient for real situation is calculated. Received optical power of circular Gaussian beam for particular aperture radius to optical beam half widths ratios is calculated and relative variation of the received optical power of the beam passing through the turbulent atmosphere is determined. The dependence of the received optical power on the modified Equivalent Temperature Gradient is also presented in the paper. The work is closed by the definition of the next tasks which should be solved before the method of modified Equivalent Temperature Gradient will be applied for estimation of the turbulence strength in optical wireless communication with terabit transmission rates.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125945947","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
Inkjet Printed vs Screen Printed Microstrip Line on LTCC substrates 在LTCC基板上喷墨印刷与丝网印刷微带线
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733512
Krzysztof Szostak, Krzysztof Szostak, Milena Kiliszkiewicz, Laura Jasińska, P. Słobodzian, R. Korbutowicz, K. Malecha
{"title":"Inkjet Printed vs Screen Printed Microstrip Line on LTCC substrates","authors":"Krzysztof Szostak, Krzysztof Szostak, Milena Kiliszkiewicz, Laura Jasińska, P. Słobodzian, R. Korbutowicz, K. Malecha","doi":"10.1109/COMITE.2019.8733512","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733512","url":null,"abstract":"In this paper we compare the influence of two printing techniques on wideband performance of a microstrip line on LTCC substrate. The inkjet printing and screen printing techniques are compared. The quality of conductive layers is analyzed in terms of material type (paste and ink), their thickness, roughness and shape of pattern edges. Finally, microstrip line performance is characterized for frequencies up to 20 GHz. We show that microstrip lines made of two layers of nanosilver ink performs poorly. In this case the insertion loss can be several times higher (in dB) in comparison to insertion loss introduced by silver paste-made microstrip lines.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133127790","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: 4
ICAO Antenna for sidelobe suppression ICAO天线用于旁瓣抑制
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733500
V. Závodný, Marek Dvorsky, V. Schejbal
{"title":"ICAO Antenna for sidelobe suppression","authors":"V. Závodný, Marek Dvorsky, V. Schejbal","doi":"10.1109/COMITE.2019.8733500","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733500","url":null,"abstract":"The paper presents the Chu-Dunbar reflector antenna for primary surveillance radar 1.25-1.35 GHz and integrated monopulse system for secondary surveillance radar at frequency band 1.03 and 1.09 GHz. The main topic of this paper is the mechanical concept of a dipole antenna array that produces a monopulse antenna diagram at a horizontal (azimuthal) plane. The sidelobe suppression is cowered due to antenna array at the top of the reflector antenna.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"28 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123911713","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
Hexagonal-Cell Artifical Magnetic Conductor Waveguide 六角形人造磁导体波导
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733462
Martin Kokolia
{"title":"Hexagonal-Cell Artifical Magnetic Conductor Waveguide","authors":"Martin Kokolia","doi":"10.1109/COMITE.2019.8733462","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733462","url":null,"abstract":"This paper is proposing a substrate-integrated waveguide (SIW) that is based on an electromagnetic band gap (EBG) hexagonal structure. This technology is very promising because it does not utilize any metallic vias to form a waveguide, and therefore, the design is meant to be later utilized in textile substrates. The geometry can be easily scaled to high frequencies at which the conventional SIW could be hardly manufactured. The hexagonal shape of the EBG cell is improving the performance of non-straight sections and provides a reasonable band-width. The proposed SIW is simulated and measured at lower frequencies as a proof of concept. The frequency upscale is planned for further development.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122996757","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
Identification and Suppression of Slot Modes in a Coaxial Magnetron 同轴磁控管缝隙模式的辨识与抑制
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733425
M. Joshi, S. Vyas, T. Tiwari, J. Pidanic, Z. Nemec, R. Bhattacharjee
{"title":"Identification and Suppression of Slot Modes in a Coaxial Magnetron","authors":"M. Joshi, S. Vyas, T. Tiwari, J. Pidanic, Z. Nemec, R. Bhattacharjee","doi":"10.1109/COMITE.2019.8733425","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733425","url":null,"abstract":"This paper presents the details of identification and suppression technique of slot modes in X-band coaxial magnetron. Lower frequency slot mode is more susceptible to interfere with the desired mode of coaxial magnetron. An effective spurious mode suppression technique is proposed for such slot mode. A lossy dielectric ring is placed near the coupling slots inside anode shell. Analysis is carried out in eigenmode solver of CST. Quality factor of the unwanted slot mode is reduced by 98.56% by the proposed mode suppression technique while reducing quality factor of the desired mode by only 11%. Quality factor of the slot mode is obtained as 30 and for the desired mode as 10913 after the mode suppression. Mode suppressor also reduces the electric field strength of fringing field of the slot mode without affecting field strength of the desired mode.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117019234","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
Lightweight Microstrip Patch Array for Broadband UAV Applications over 5G networks 5G宽带无人机应用的轻型微带贴片阵列
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733547
M. J. Arpaio, F. Fuschini, E. Vitucci, V. Degli Esposti, M. Barbiroli, D. Masotti
{"title":"Lightweight Microstrip Patch Array for Broadband UAV Applications over 5G networks","authors":"M. J. Arpaio, F. Fuschini, E. Vitucci, V. Degli Esposti, M. Barbiroli, D. Masotti","doi":"10.1109/COMITE.2019.8733547","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733547","url":null,"abstract":"This paper describes the design of a coaxial fed compact patch antenna with a centre frequency of 3.6 GHz for broadband Unmanned Air Vehicle (UAV) applications over 5G networks. A single element is designed using CST Microwave Studio software. Compared to traditional narrowband microstrip antennas, the antenna has a wider band covering the 3.4 – 3.8 GHz range thanks to a parasitic patch on top. In order to achieve a lightweight structure, the antenna proposed in this paper is designed using first Rogers RO4350 laminate substrate and then RT Duroid 5880. The particularity of this lightweight antenna relies on the use of Rohacell 31HF between the radiating patch and the parasitic one. In order to increase the gain, a 2x2 rectangular array is investigated as well within this paper. The results are compared and discussed in terms of return loss, bandwidth, gain and radiation pattern. These results show an antenna with a low profile and a simple structure that is able both to suit future 5G applications and to be a perfect candidate for future applications on board of UAVs","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"521 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132283949","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
Waveguide Tuning Stub with Internal Choke 波导调谐Stub与内部扼流圈
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733584
V. Bilik
{"title":"Waveguide Tuning Stub with Internal Choke","authors":"V. Bilik","doi":"10.1109/COMITE.2019.8733584","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733584","url":null,"abstract":"We present working principles, circuit analyses, electromagnetic simulation, and experiments in 2.45-GHz band of a noncontacting waveguide tuning stub structure that incorporates a microwave choke inside the stub. The main advantages of such an internal choke compared to traditional external chokes built in the body surrounding the stub are a substantially lower radiation leakage, smaller overall radius, and the possibility of using air as the choke dielectric.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132831702","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: 1
Broadband Differentially-Fed Substrate-Integrated Directional Coupler 宽带差分馈电基片集成定向耦合器
2019 Conference on Microwave Techniques (COMITE) Pub Date : 2019-04-01 DOI: 10.1109/COMITE.2019.8733577
S. Gruszczynski, R. Smolarz, A. Rydosz, K. Wincza
{"title":"Broadband Differentially-Fed Substrate-Integrated Directional Coupler","authors":"S. Gruszczynski, R. Smolarz, A. Rydosz, K. Wincza","doi":"10.1109/COMITE.2019.8733577","DOIUrl":"https://doi.org/10.1109/COMITE.2019.8733577","url":null,"abstract":"The investigation results on the design of branch-line coupler have been presented. The coupler is designed as a differential circuit with the use of two-conductor substrate-integrated transmission-line technique. The four-branch topology has been employed in order to enhance the operational bandwidth, whereas the impedances of the transmission lines have been optimized to allow for their physical realization.","PeriodicalId":143358,"journal":{"name":"2019 Conference on Microwave Techniques (COMITE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114784699","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: 1
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