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.2015.7120335
D. Krutilek, Z. Raida
This paper describes necessary adjustments of the original CAD data which are needed to obtain a geometry suitable for meshing. These are general procedures that are based on the experience and knowledge of creator of such models. Furthermore, the paper presents results of models that are meshed with correct and incorrect surface mesh.
{"title":"Optimal meshing for high-frequency analysis of realistic structure","authors":"D. Krutilek, Z. Raida","doi":"10.1109/COMITE.2015.7120335","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120335","url":null,"abstract":"This paper describes necessary adjustments of the original CAD data which are needed to obtain a geometry suitable for meshing. These are general procedures that are based on the experience and knowledge of creator of such models. Furthermore, the paper presents results of models that are meshed with correct and incorrect surface mesh.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"2 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":"122569883","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.2015.7120222
P. Vasina, J. Lacik
In this paper, a novel low profile 2 × 2 SIW rectangular ring slot antenna array for 60 GHz band is proposed. It radiates linearly polarized wave with maximum radiation in the perpendicular direction to the antenna plane. Experimental results prove that the proposed antenna achieves the impedance bandwidth of 5.7 % for the reflection coefficient less than -10 dB and the gain of 13 dBi.
{"title":"2 × 2 SIW rectangular ring slot antenna array for 60 GHz band","authors":"P. Vasina, J. Lacik","doi":"10.1109/COMITE.2015.7120222","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120222","url":null,"abstract":"In this paper, a novel low profile 2 × 2 SIW rectangular ring slot antenna array for 60 GHz band is proposed. It radiates linearly polarized wave with maximum radiation in the perpendicular direction to the antenna plane. Experimental results prove that the proposed antenna achieves the impedance bandwidth of 5.7 % for the reflection coefficient less than -10 dB and the gain of 13 dBi.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"90 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":"125237245","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.2015.7120321
Seif Naoui, L. Latrach, A. Gharsallah
This paper focuses in the first part to demonstrate the correlation between the physical quantities of nested split ring resonators and its frequency characteristics. The investigation is conducted in a parametric study based on the simulation results and the theoretical proofs. The second part is reserved for our proposed approach to develop the method of improvement and miniaturization of RFID antennas by the inclusion of metamaterials. All simulation results were made by the CST Microwave Studio.
{"title":"Improvement RFID antenna by using nested split ring resonators","authors":"Seif Naoui, L. Latrach, A. Gharsallah","doi":"10.1109/COMITE.2015.7120321","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120321","url":null,"abstract":"This paper focuses in the first part to demonstrate the correlation between the physical quantities of nested split ring resonators and its frequency characteristics. The investigation is conducted in a parametric study based on the simulation results and the theoretical proofs. The second part is reserved for our proposed approach to develop the method of improvement and miniaturization of RFID antennas by the inclusion of metamaterials. All simulation results were made by the CST Microwave Studio.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"19 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":"130175744","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.2015.7120325
J. Thornton, David Smith, S. Foti, Y. Jiang
The hemispherical (or half-Luneburg) lens antenna is a candidate type for satellite communications-on-the-move, either singly or as an element in a small array. It offers good aperture efficiency in a reduced height and excellent scanning performance. This work describes the development of half Luneburg lens antennas together with feeding arrangements to provide highly directive antennas with good scanning properties. The effects of the primary feed pattern and other loss mechanisms are investigated and reported. Measured gain for a 432mm diameter polymer lens at 30 GHz is 38.7 dBi.
{"title":"Reduced height Luneburg lens antennas for satellite communications-on-the-move","authors":"J. Thornton, David Smith, S. Foti, Y. Jiang","doi":"10.1109/COMITE.2015.7120325","DOIUrl":"https://doi.org/10.1109/COMITE.2015.7120325","url":null,"abstract":"The hemispherical (or half-Luneburg) lens antenna is a candidate type for satellite communications-on-the-move, either singly or as an element in a small array. It offers good aperture efficiency in a reduced height and excellent scanning performance. This work describes the development of half Luneburg lens antennas together with feeding arrangements to provide highly directive antennas with good scanning properties. The effects of the primary feed pattern and other loss mechanisms are investigated and reported. Measured gain for a 432mm diameter polymer lens at 30 GHz is 38.7 dBi.","PeriodicalId":250220,"journal":{"name":"2015 Conference on Microwave Techniques (COMITE)","volume":"40 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":"116123713","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}
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