Pub Date : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959659
L. Miccinesi, M. Pieraccini
A monostatic/bistatic interferometric radar for monitoring/testing slander structures (like telecommunications towers, wind turbine towers, bell-towers, minarets, obelisks …) is presented. It has been tested on the real case of a telecommunication towers in Florence, Italy mechanically excited by a slight wind. The radar has been able to detect the displacement vector of several points along its height and even the axis of symmetry of the structure. This is an important parameter for assessing the dynamic response of the structure.
{"title":"Monostatic/Bistatic Interferometric Radar for Monitoring Slander Structures","authors":"L. Miccinesi, M. Pieraccini","doi":"10.1109/CAMA47423.2019.8959659","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959659","url":null,"abstract":"A monostatic/bistatic interferometric radar for monitoring/testing slander structures (like telecommunications towers, wind turbine towers, bell-towers, minarets, obelisks …) is presented. It has been tested on the real case of a telecommunication towers in Florence, Italy mechanically excited by a slight wind. The radar has been able to detect the displacement vector of several points along its height and even the axis of symmetry of the structure. This is an important parameter for assessing the dynamic response of the structure.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124201839","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 : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959723
Y. Wahyu, Y. N. Wijayanto, A. Lestari
Preparation of land is always required to build infrastructure. One method to measure the land condition can be used with ground penetrating radar (GPR). An antenna using linear resistive loading was proposed as a sensor for transmitting and receiving microwave signals. The antenna is required with large bandwidth and operated with two pulses in time domains with 0.8 and 1.6 nm cycles. The proposed antenna is performed for GPR application. The experimental results are reported and discussed in this paper for identifying an object under the earth.
{"title":"Performance of Antenna Using Linear Resistive Loading for Ground Penetrating Radar","authors":"Y. Wahyu, Y. N. Wijayanto, A. Lestari","doi":"10.1109/CAMA47423.2019.8959723","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959723","url":null,"abstract":"Preparation of land is always required to build infrastructure. One method to measure the land condition can be used with ground penetrating radar (GPR). An antenna using linear resistive loading was proposed as a sensor for transmitting and receiving microwave signals. The antenna is required with large bandwidth and operated with two pulses in time domains with 0.8 and 1.6 nm cycles. The proposed antenna is performed for GPR application. The experimental results are reported and discussed in this paper for identifying an object under the earth.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"796 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131497810","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 : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959783
A. Konforta, C. Liontas, T. Bertuch, T. Eibert
Antenna array performance is often significantly influenced by the mutual coupling between the antenna elements. This influence is commonly completely neglected, if only the array factor is taken into account during antenna design and optimization, which can lead to serious errors in the prediction of the array performance. A precise calculation of the mutual coupling requires full-wave simulations whose costs are often prohibitive during design. In this work we present a low-computational-cost alternative for approximating the mutual coupling based on the reaction integral and the Huygens principle. For an exemplary 5 ×5 planar array, it is shown that our method provides a good first-order approximation of the active reflection with reasonable computational overhead.
{"title":"Approximation of the Active Reflection Coefficient in Phased Arrays via the Concept of Reaction","authors":"A. Konforta, C. Liontas, T. Bertuch, T. Eibert","doi":"10.1109/CAMA47423.2019.8959783","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959783","url":null,"abstract":"Antenna array performance is often significantly influenced by the mutual coupling between the antenna elements. This influence is commonly completely neglected, if only the array factor is taken into account during antenna design and optimization, which can lead to serious errors in the prediction of the array performance. A precise calculation of the mutual coupling requires full-wave simulations whose costs are often prohibitive during design. In this work we present a low-computational-cost alternative for approximating the mutual coupling based on the reaction integral and the Huygens principle. For an exemplary 5 ×5 planar array, it is shown that our method provides a good first-order approximation of the active reflection with reasonable computational overhead.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127146513","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 : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959608
M. Pieraccini, L. Miccinesi, A. Nejad, Azadeh Naderi Nejad Fard
The Veresk bridge is a railway masonry arch bridge in Iran. It came into operation in 1936. Since 1977 is part of National Heritage and it is still an essential transport infrastructure. As this bridge has been monitored in 2016 installing a network of standard sensors (DCDT, LVDT, strain gauges and extensometers) it has been a good case study for assessing the relatively new monitoring technology of ground-based radar interferometry. The experimental data gathered by the radar interferometer are in substantial agreement with previous studies on the same bridge.
{"title":"Monitoring of Veresk Rail Bridge Using a Radar Interferometer","authors":"M. Pieraccini, L. Miccinesi, A. Nejad, Azadeh Naderi Nejad Fard","doi":"10.1109/CAMA47423.2019.8959608","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959608","url":null,"abstract":"The Veresk bridge is a railway masonry arch bridge in Iran. It came into operation in 1936. Since 1977 is part of National Heritage and it is still an essential transport infrastructure. As this bridge has been monitored in 2016 installing a network of standard sensors (DCDT, LVDT, strain gauges and extensometers) it has been a good case study for assessing the relatively new monitoring technology of ground-based radar interferometry. The experimental data gathered by the radar interferometer are in substantial agreement with previous studies on the same bridge.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127036698","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 : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959764
M. Sumi
In this paper, a circularly polarized metasurface antenna comprising printed rectangular loops with gaps for Global Navigation Satellite Systems (GNSSs) receivers in the Ll band (1575.42 MHz) is proposed. Two gaps on rectangular loops are located symmetrically with respect to the feed point to produce Right Handed Circular Polarization (RHCP). A loop-type Frequency Selective Surface (FSS) is adopted to lower antenna height and enhance antenna gain. The Voltage Standing Wave Ratio (VSWR) bandwidth (≤2) for the proposed antenna is 19.0%. The Axial Ratio (AR) bandwidth (≤3 dB) for the proposed antenna is 24.0%. The proposed antenna achieves broadband VSWR and AR frequency characteristics with a single feed and an antenna height of 0.121 wavelengths. The proposed antenna is suitable for GNSS receivers due to its low profile structure.
{"title":"A Circularly Polarized Metasurface Antenna Comprising Printed Rectangular Loops with Gaps for GNSS Receivers","authors":"M. Sumi","doi":"10.1109/CAMA47423.2019.8959764","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959764","url":null,"abstract":"In this paper, a circularly polarized metasurface antenna comprising printed rectangular loops with gaps for Global Navigation Satellite Systems (GNSSs) receivers in the Ll band (1575.42 MHz) is proposed. Two gaps on rectangular loops are located symmetrically with respect to the feed point to produce Right Handed Circular Polarization (RHCP). A loop-type Frequency Selective Surface (FSS) is adopted to lower antenna height and enhance antenna gain. The Voltage Standing Wave Ratio (VSWR) bandwidth (≤2) for the proposed antenna is 19.0%. The Axial Ratio (AR) bandwidth (≤3 dB) for the proposed antenna is 24.0%. The proposed antenna achieves broadband VSWR and AR frequency characteristics with a single feed and an antenna height of 0.121 wavelengths. The proposed antenna is suitable for GNSS receivers due to its low profile structure.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129417809","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 : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959752
Ali El Hajj Hassan, N. Fadlallah, M. Rammal, G. E. El Nashef, E. Rachid
This paper presents a novel technique to achieve a broad impedance bandwidth required to pursue the development in the field of wireless communication by proposing a design of a reconfigurable broadband stacked patch antenna, based on liquid crystal and aperture coupled feeding with two square patch elements. The MDA-00-3506 liquid crystal (LC) is used as a dielectric. The antenna operates at millimeter wave from 24.4 GHz to 32.8 GHz with a bandwidth of 7.8 GHz. The maximum achievable antenna gain is 7 dB.
{"title":"Reconfigurable Stacked Patch Antenna Using Liquid Crystal for Millimeter Wave","authors":"Ali El Hajj Hassan, N. Fadlallah, M. Rammal, G. E. El Nashef, E. Rachid","doi":"10.1109/CAMA47423.2019.8959752","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959752","url":null,"abstract":"This paper presents a novel technique to achieve a broad impedance bandwidth required to pursue the development in the field of wireless communication by proposing a design of a reconfigurable broadband stacked patch antenna, based on liquid crystal and aperture coupled feeding with two square patch elements. The MDA-00-3506 liquid crystal (LC) is used as a dielectric. The antenna operates at millimeter wave from 24.4 GHz to 32.8 GHz with a bandwidth of 7.8 GHz. The maximum achievable antenna gain is 7 dB.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121547465","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 : 2019-10-01DOI: 10.1109/CAMA47423.2019.8959697
Warunee Kudpun, Nattapong Duangrit, N. Chudpooti, P. Lorwongtragool, S. Seewattanapon, P. Akkaraekthalin
In this paper, a microwave gas sensor using interdigital resonator with coating of poly (3,4-ethylenedioxythiophene) polystyrene sulfonate or PDOT:PSS is presented. The proposed sensor uses the change of conductivity properties of PDOT:PSS when the ammonia gas is adsorbed on PDOT:PSS layer. The interdigital resonator was designed at the center of ungrounded coplanar waveguide transmission-line by creating the rejection characteristic at 4.08 GHz. The proposed sensor was fabricated on DiClad 880 substrate with the dielectric constant of 2.2 and loss factor of 0.008. To improve the sensitivity of the sensor, the PDOT:PSS was coated on top of the interdigital resonator, resulting in the operating frequency was shifted to 3.584 GHz. The measured results for six samples of ammonia hydroxide concentration (50, 100,200,500, 1000, and 2000 ppm) under a static system in the closed chamber at room temperature were recorded for five minutes after injecting the ammonia sample. When the ammonia gas concentration increases, the resonant frequency is changed 38 MHz from 3.584 GHz to higher frequency of 3.622 GHz by injecting ammonia concentration from 50 ppm to 2000 ppm. The proposed microwave gas sensor using interdigital resonator coated with PDOT:PSS has the potential to clearly observe gas concentration in various agricultural applications.
{"title":"A Microwave Gas Sensor Using Interdigital Resonator Coated with Conducting Polymer for Agricultural Applications","authors":"Warunee Kudpun, Nattapong Duangrit, N. Chudpooti, P. Lorwongtragool, S. Seewattanapon, P. Akkaraekthalin","doi":"10.1109/CAMA47423.2019.8959697","DOIUrl":"https://doi.org/10.1109/CAMA47423.2019.8959697","url":null,"abstract":"In this paper, a microwave gas sensor using interdigital resonator with coating of poly (3,4-ethylenedioxythiophene) polystyrene sulfonate or PDOT:PSS is presented. The proposed sensor uses the change of conductivity properties of PDOT:PSS when the ammonia gas is adsorbed on PDOT:PSS layer. The interdigital resonator was designed at the center of ungrounded coplanar waveguide transmission-line by creating the rejection characteristic at 4.08 GHz. The proposed sensor was fabricated on DiClad 880 substrate with the dielectric constant of 2.2 and loss factor of 0.008. To improve the sensitivity of the sensor, the PDOT:PSS was coated on top of the interdigital resonator, resulting in the operating frequency was shifted to 3.584 GHz. The measured results for six samples of ammonia hydroxide concentration (50, 100,200,500, 1000, and 2000 ppm) under a static system in the closed chamber at room temperature were recorded for five minutes after injecting the ammonia sample. When the ammonia gas concentration increases, the resonant frequency is changed 38 MHz from 3.584 GHz to higher frequency of 3.622 GHz by injecting ammonia concentration from 50 ppm to 2000 ppm. The proposed microwave gas sensor using interdigital resonator coated with PDOT:PSS has the potential to clearly observe gas concentration in various agricultural applications.","PeriodicalId":170627,"journal":{"name":"2019 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115027399","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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