Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120224
K. Sakharov, V. Turkin, O. Mikheev, A. Sukhov, A. I. Aleshko
A measuring system for characterization of radar-absorbing materials (RAM) with sounding ultra-short electromagnetic pulses (EMP) is proposed. Pulse generation and measurement are considered. Measuring signal processing is discussed. A proposed measuring system allows measurement RAM's characteristics over the frequency range from 0.1 up to 40 GHz.
{"title":"A measuring system for characterization of radar-absorbing materials with sounding ultra-short electromagnetic pulses over the range 0.1–40 GHz","authors":"K. Sakharov, V. Turkin, O. Mikheev, A. Sukhov, A. I. Aleshko","doi":"10.1109/COMITE.2015.7120224","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120224","url":null,"abstract":"A measuring system for characterization of radar-absorbing materials (RAM) with sounding ultra-short electromagnetic pulses (EMP) is proposed. Pulse generation and measurement are considered. Measuring signal processing is discussed. A proposed measuring system allows measurement RAM's characteristics over the frequency range from 0.1 up to 40 GHz.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122645185","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120231
M. Taouzari, A. Mouhsen, J. El aoufi, H. Nasraoui, O. El Mrabat
The growing interest in the Radio Frequency Identification (RFID) technology is giving rise to new applications. This interest has initiated the development of new designs for RFID tag antenna. This paper presents an UHF miniaturized tag antenna, it's designed and simulated by using FR4 substrate at 915 MHz, meander line is used to design this tag, it's simulated by using CST microwave software it's found a good results of matching, radiation pattern and gain at 915 MHz.
{"title":"Miniaturized design of passive ultra-high frequency Radio Frequency Identification tag","authors":"M. Taouzari, A. Mouhsen, J. El aoufi, H. Nasraoui, O. El Mrabat","doi":"10.1109/COMITE.2015.7120231","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120231","url":null,"abstract":"The growing interest in the Radio Frequency Identification (RFID) technology is giving rise to new applications. This interest has initiated the development of new designs for RFID tag antenna. This paper presents an UHF miniaturized tag antenna, it's designed and simulated by using FR4 substrate at 915 MHz, meander line is used to design this tag, it's simulated by using CST microwave software it's found a good results of matching, radiation pattern and gain at 915 MHz.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126311997","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120326
Hongyeal Lee, M. Uhm, I. Yom
In this paper, a K-band broadband in-line transition from a substrate integrated waveguide (SIW) to a rectangular waveguide (RWG) is proposed. The transition is realized by using a substrate taper inserted into a height-stepped impedance transformer in the RWG region. The transition is designed to cover the 18-26 GHz frequency band, showing a return loss of 20 dB. A back-to-back transition has been fabricated to verify the proposed transition. The measured results show good agreement with the simulation. The results show an insertion loss less than 0.65 dB and a return loss better than 16 dB in the designed frequency band.
{"title":"K-band substrate integrated waveguide to rectangular waveguide transition","authors":"Hongyeal Lee, M. Uhm, I. Yom","doi":"10.1109/COMITE.2015.7120326","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120326","url":null,"abstract":"In this paper, a K-band broadband in-line transition from a substrate integrated waveguide (SIW) to a rectangular waveguide (RWG) is proposed. The transition is realized by using a substrate taper inserted into a height-stepped impedance transformer in the RWG region. The transition is designed to cover the 18-26 GHz frequency band, showing a return loss of 20 dB. A back-to-back transition has been fabricated to verify the proposed transition. The measured results show good agreement with the simulation. The results show an insertion loss less than 0.65 dB and a return loss better than 16 dB in the designed frequency band.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114608550","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120313
M. Mrnka, Z. Raida, J. Grosinger
Energy harvesting seems to be a suitable solution for remote device powering in systems like wireless sensor networks, which are becoming ubiquitous. In presented paper, a wide-band Dielectric Resonator Antenna (DRA) for RF energy harvesting is studied. The frequency band of interest lies between 1.84 GHz and 2.445 GHz, covering three main wireless communication systems, namely Global System for Mobile Communications (GSM) operating on 1800 MHz, Universal Mobile Telecommunications System (UMTS) at 2100 MHz and wireless local area network (WLAN) based on 802.11 IEEE standard [9] at 2400 MHz. Two antennas based on identical bow-tie dielectric resonators with different feeding schemes are proposed. The aperture coupled DRA shows superior performance in terms of impedance matching and stability of the radiation pattern when compared to the probe coupled antenna. The simulation results of these two antennas are compared and experimentally verified by measurements.
{"title":"Wide-band dielectric resonator antennas for RF energy harvesting","authors":"M. Mrnka, Z. Raida, J. Grosinger","doi":"10.1109/COMITE.2015.7120313","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120313","url":null,"abstract":"Energy harvesting seems to be a suitable solution for remote device powering in systems like wireless sensor networks, which are becoming ubiquitous. In presented paper, a wide-band Dielectric Resonator Antenna (DRA) for RF energy harvesting is studied. The frequency band of interest lies between 1.84 GHz and 2.445 GHz, covering three main wireless communication systems, namely Global System for Mobile Communications (GSM) operating on 1800 MHz, Universal Mobile Telecommunications System (UMTS) at 2100 MHz and wireless local area network (WLAN) based on 802.11 IEEE standard [9] at 2400 MHz. Two antennas based on identical bow-tie dielectric resonators with different feeding schemes are proposed. The aperture coupled DRA shows superior performance in terms of impedance matching and stability of the radiation pattern when compared to the probe coupled antenna. The simulation results of these two antennas are compared and experimentally verified by measurements.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128934105","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120330
P. Petkov, Miladin R. Kolev, B. Bonev
A Yagi antenna with three fractal Koch curve shaped elements is proposed in this paper. The antenna performances (radiation pattern, return loss and gain) are simulated and compared with these of classical Yagi antenna for the same frequency band. Fractal Yagi antenna features relatively small size and high gain. The return loss is experimentally measured.
{"title":"Fractal Yagi antenna","authors":"P. Petkov, Miladin R. Kolev, B. Bonev","doi":"10.1109/COMITE.2015.7120330","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120330","url":null,"abstract":"A Yagi antenna with three fractal Koch curve shaped elements is proposed in this paper. The antenna performances (radiation pattern, return loss and gain) are simulated and compared with these of classical Yagi antenna for the same frequency band. Fractal Yagi antenna features relatively small size and high gain. The return loss is experimentally measured.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"157 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132090413","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120319
Tsvetan Mitsev, E. Ferdinandov
A methodology to compensate for the influence of external noises on the set value of BER, respectively the SNR, at the output of the optical receiver of the FSO systems has been developed. This compensation is achieved by increasing the power in the input of the receiver's photodetector together with a corresponding expansion of the optical beam of the transmitter. An important point in the methodology is finding the optimal angle of divergence of the laser beam. At this angle, the required transmitter's power obtains a minimum value.
{"title":"Methodology for realization of given BER in FSO systems under effect of internal and external noises","authors":"Tsvetan Mitsev, E. Ferdinandov","doi":"10.1109/COMITE.2015.7120319","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120319","url":null,"abstract":"A methodology to compensate for the influence of external noises on the set value of BER, respectively the SNR, at the output of the optical receiver of the FSO systems has been developed. This compensation is achieved by increasing the power in the input of the receiver's photodetector together with a corresponding expansion of the optical beam of the transmitter. An important point in the methodology is finding the optimal angle of divergence of the laser beam. At this angle, the required transmitter's power obtains a minimum value.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123519003","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120341
A. Gołaszewski, M. Zukocinski, A. Abramowicz
The tunable bandpass filter is presented. The filter is realized in microstrip technology employing two stepped-impedance resonators tuned with varactor diodes. The filter has constant absolute bandwidth of 30 MHz in the frequency range from 380 MHz to 920 MHz. The insertion loss is lower than 5 dB and return loss higher than 17 dB in the full tuning range. The out of band attenuation is higher than 40 dB at frequencies below the passband and is higher than 50 dB at frequencies above the passband. The first spurious modes are observed at 3 GHz. Absolute bandwidth and the time delay in the full tuning range change by 33% only while center frequency changes 242%.
{"title":"Design of varactor tuned bandpass filter","authors":"A. Gołaszewski, M. Zukocinski, A. Abramowicz","doi":"10.1109/COMITE.2015.7120341","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120341","url":null,"abstract":"The tunable bandpass filter is presented. The filter is realized in microstrip technology employing two stepped-impedance resonators tuned with varactor diodes. The filter has constant absolute bandwidth of 30 MHz in the frequency range from 380 MHz to 920 MHz. The insertion loss is lower than 5 dB and return loss higher than 17 dB in the full tuning range. The out of band attenuation is higher than 40 dB at frequencies below the passband and is higher than 50 dB at frequencies above the passband. The first spurious modes are observed at 3 GHz. Absolute bandwidth and the time delay in the full tuning range change by 33% only while center frequency changes 242%.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129139925","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120229
A. L’vov, R. V. Geranin, N. Semezhev, P. A. L'vov
A new universal technique for microwave load complex reflection coefficient estimation with an arbitrary multiport reflectometer based on the solution of its quadric equations by the maximum likelihood method is proposed. The expressions for error matrix of estimating parameters are obtained in linear approximation that allows one to investigate analytically the measuring uncertainties. An optimization method of multiport parameters for measurement in narrow and wide frequency ranges is described. The results of computer simulation confirming the theoretical conclusions are given.
{"title":"Statistical approach to measurements with microwave multi-port reflectometer and optimization of its construction","authors":"A. L’vov, R. V. Geranin, N. Semezhev, P. A. L'vov","doi":"10.1109/COMITE.2015.7120229","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120229","url":null,"abstract":"A new universal technique for microwave load complex reflection coefficient estimation with an arbitrary multiport reflectometer based on the solution of its quadric equations by the maximum likelihood method is proposed. The expressions for error matrix of estimating parameters are obtained in linear approximation that allows one to investigate analytically the measuring uncertainties. An optimization method of multiport parameters for measurement in narrow and wide frequency ranges is described. The results of computer simulation confirming the theoretical conclusions are given.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116286838","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120329
O. Fiser, V. Brazda, V. Schejbal
Institute of Atmospheric Physics has measured in cooperation with University of Pardubice atmospheric attenuation on experimental FSO link on 830 and 1550 nm for 4 years. Experimental site is located at meteorological observatory on the isolated mountain with frequent fog, low clouds and strong wind occurrence. Measured attenuation is correlated with the mean horizontal wind speed, mean 3D wind speed, turbulence intensity, turbulent energy, standard deviation of the wind speed and the highest wind gust. Simple empirical models estimating attenuation of FSO link from wind parameters are formulated and verified through our experimental activity.
{"title":"Tests of wind parameters as predictors of free space optic link attenuation","authors":"O. Fiser, V. Brazda, V. Schejbal","doi":"10.1109/COMITE.2015.7120329","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120329","url":null,"abstract":"Institute of Atmospheric Physics has measured in cooperation with University of Pardubice atmospheric attenuation on experimental FSO link on 830 and 1550 nm for 4 years. Experimental site is located at meteorological observatory on the isolated mountain with frequent fog, low clouds and strong wind occurrence. Measured attenuation is correlated with the mean horizontal wind speed, mean 3D wind speed, turbulence intensity, turbulent energy, standard deviation of the wind speed and the highest wind gust. Simple empirical models estimating attenuation of FSO link from wind parameters are formulated and verified through our experimental activity.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114838132","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}
Pub Date : 2015-04-22DOI: 10.1109/COMITE.2015.7120336
P. Bieńkowski, Jaroslaw Emilianowicz, B. Zubrzak
Paper presents a concept of pulse electromagnetic field (PEMF) standard setup with envelope shaping. Analysis of EMF sources with particular pulse envelopes is performed. Authors presented novel approach to build standard setup, that allow to shape envelope of generated PEMF. A prototype and principal of operation was described, two methods of envelope data handling presented and also a preliminary results of prototype testing.
{"title":"A prototype of pulse electromagnetic field standard setup with envelope shaping","authors":"P. Bieńkowski, Jaroslaw Emilianowicz, B. Zubrzak","doi":"10.1109/COMITE.2015.7120336","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120336","url":null,"abstract":"Paper presents a concept of pulse electromagnetic field (PEMF) standard setup with envelope shaping. Analysis of EMF sources with particular pulse envelopes is performed. Authors presented novel approach to build standard setup, that allow to shape envelope of generated PEMF. A prototype and principal of operation was described, two methods of envelope data handling presented and also a preliminary results of prototype testing.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121546029","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：