Pub Date : 2014-11-01DOI: 10.1109/CAMA.2014.7003322
Daniele Pinchera, M. Migliore
A simple and fast deterministic approach for sparse array synthesis is proposed. The algorithm employs a modified generalized alternate projection algorithm using 1-norm minimization in order to achieve the excitation and the position of the elements of a sparse array. Some preliminary results presented show the promising performances of the introduced method.
{"title":"Effective sparse array synthesis using a generalized alternate projection algorithm","authors":"Daniele Pinchera, M. Migliore","doi":"10.1109/CAMA.2014.7003322","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003322","url":null,"abstract":"A simple and fast deterministic approach for sparse array synthesis is proposed. The algorithm employs a modified generalized alternate projection algorithm using 1-norm minimization in order to achieve the excitation and the position of the elements of a sparse array. Some preliminary results presented show the promising performances of the introduced method.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121484597","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003341
Sangbong Jeon, J. Kwon, Dongho Kim
The transverse electromagnetic (TEM) cells are widely used for field probe calibrations. We propose the verification of TEM mode with statistical method using a four-port TEM cell. The verification results are compared with Normal, Rayleigh, Gamma distribution. As a result, the 75 % quantile of the Rayleigh distribution is excellent agreement with the true quantiles for a number of calibration points.
{"title":"Study of a four-port TEM cell with the statistical approach for the calibration of EM field probe","authors":"Sangbong Jeon, J. Kwon, Dongho Kim","doi":"10.1109/CAMA.2014.7003341","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003341","url":null,"abstract":"The transverse electromagnetic (TEM) cells are widely used for field probe calibrations. We propose the verification of TEM mode with statistical method using a four-port TEM cell. The verification results are compared with Normal, Rayleigh, Gamma distribution. As a result, the 75 % quantile of the Rayleigh distribution is excellent agreement with the true quantiles for a number of calibration points.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124307439","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003422
A. Cozza, F. Monsef
We study the feasibility of imaging the presence and position of apertures in a metallic shielding. The proposed procedure is inspired by inverse synthetic aperture radar imaging, applied to signals received at the interior of the system under test (SUT), within the shield to be imaged. The SUT is submitted to a series of plane waves impinging from different directions of arrival; the proposed procedure transforms directional and phase-shift information into spatial resolution, without requiring necessarily the use of spatially resolved waves to estimate the position of apertures. Numerical results are shown, and demonstrate the feasibility of localizing several apertures from a single internal receiver.
{"title":"Adapting ISAR imaging ideas to coupling-aperture identification in a metallic shielding","authors":"A. Cozza, F. Monsef","doi":"10.1109/CAMA.2014.7003422","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003422","url":null,"abstract":"We study the feasibility of imaging the presence and position of apertures in a metallic shielding. The proposed procedure is inspired by inverse synthetic aperture radar imaging, applied to signals received at the interior of the system under test (SUT), within the shield to be imaged. The SUT is submitted to a series of plane waves impinging from different directions of arrival; the proposed procedure transforms directional and phase-shift information into spatial resolution, without requiring necessarily the use of spatially resolved waves to estimate the position of apertures. Numerical results are shown, and demonstrate the feasibility of localizing several apertures from a single internal receiver.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132373095","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003439
M. Croizer, R. Vezinet, L. M. Mir, J. Andrieu, M. Jouvet
Since decades, some studies have been done to determinate electromagnetics impulses effects on biological tissues. Some results of these studies are used in medical therapies, like electrochemotherapy. This paper deals with the design of a new antenna applicator for in vivo experiments. The radiating waveforms are subnanoseconds pulses, which effects on biological tissues are not well known. The design of this new applicator is based on the PSIRA (Prolate Spheroidal impulse Radiating Antenna) designed by C. E Baum[1]-[2]. This applicator radiate in a dielectric medium like water, to minimize reflections between the excitation site and the biological tissue under radiation. Design issues, and measurements are discussed.
几十年来，已经进行了一些研究来确定电磁脉冲对生物组织的影响。这些研究的一些结果被用于医学治疗，如电疗。本文介绍了一种用于体内实验的新型天线应用器的设计。辐射波形为亚纳秒脉冲，对生物组织的影响尚不清楚。这种新型应用器的设计基于C. E . Baum[1]-[2]设计的PSIRA(长球面脉冲辐射天线)。这种涂敷器在像水一样的介电介质中辐射，以尽量减少辐射下激发部位和生物组织之间的反射。讨论了设计问题和测量方法。
{"title":"A new antenna applicator to study subnanoseconds impulses effects on biological tissues","authors":"M. Croizer, R. Vezinet, L. M. Mir, J. Andrieu, M. Jouvet","doi":"10.1109/CAMA.2014.7003439","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003439","url":null,"abstract":"Since decades, some studies have been done to determinate electromagnetics impulses effects on biological tissues. Some results of these studies are used in medical therapies, like electrochemotherapy. This paper deals with the design of a new antenna applicator for in vivo experiments. The radiating waveforms are subnanoseconds pulses, which effects on biological tissues are not well known. The design of this new applicator is based on the PSIRA (Prolate Spheroidal impulse Radiating Antenna) designed by C. E Baum[1]-[2]. This applicator radiate in a dielectric medium like water, to minimize reflections between the excitation site and the biological tissue under radiation. Design issues, and measurements are discussed.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130478460","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003398
S. Futatsumori, K. Morioka, A. Kohmura, M. Shioji, N. Yonemoto
The carbon fiber reinforced plastic (CFRP) materials for the millimeter-wave antenna application are experimentally evaluated. First, the polarization characteristics of the fundamental unidirectional CFRP laminates are measured at W-band. The measured transmission characteristics show that the significant difference depends on the polarization of the incident wave. Second, the CFRP parabolic reflectors with and without chrome plating are measured. The results show almost the same characteristics. From these results, the fundamental applicability of the CFRP laminates utilized in millimeter-wave antennas is confirmed.
{"title":"Fundamental applicability evaluation of carbon fiber reinforced plastic materials utilized in millimeter-wave antennas","authors":"S. Futatsumori, K. Morioka, A. Kohmura, M. Shioji, N. Yonemoto","doi":"10.1109/CAMA.2014.7003398","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003398","url":null,"abstract":"The carbon fiber reinforced plastic (CFRP) materials for the millimeter-wave antenna application are experimentally evaluated. First, the polarization characteristics of the fundamental unidirectional CFRP laminates are measured at W-band. The measured transmission characteristics show that the significant difference depends on the polarization of the incident wave. Second, the CFRP parabolic reflectors with and without chrome plating are measured. The results show almost the same characteristics. From these results, the fundamental applicability of the CFRP laminates utilized in millimeter-wave antennas is confirmed.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127634467","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003381
R. Négrier, J. Andrieu, V. Couderc, B. Shalaby, A. Labruyere, M. Lalande, V. Bertrand, L. Pécastaing, A. D. de Ferron
The originality of the radiation source presented here is localized in its ultrafast speed and its autonomy of scanning a large spatial area. That behavior is obtained by means of a trigger mode of radiation perfectly controlled by a single optical source. The transmitter consists of a powerful picoseconds laser, an optical power divider and n optoelectronic ultra-wideband radiation sources which produce several electric pulse trains with a repetition rate slightly different one with each other. Each train is then addressed toward a single antenna. When transmitted the electromagnetic waves interact to produce an ultrafast orientation of the array emission lobe allowing scanning of large spatial field in less than 1μs.
{"title":"UWB antenna array with autonomous scanning capability using integrated opto-electronic feeding device","authors":"R. Négrier, J. Andrieu, V. Couderc, B. Shalaby, A. Labruyere, M. Lalande, V. Bertrand, L. Pécastaing, A. D. de Ferron","doi":"10.1109/CAMA.2014.7003381","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003381","url":null,"abstract":"The originality of the radiation source presented here is localized in its ultrafast speed and its autonomy of scanning a large spatial area. That behavior is obtained by means of a trigger mode of radiation perfectly controlled by a single optical source. The transmitter consists of a powerful picoseconds laser, an optical power divider and n optoelectronic ultra-wideband radiation sources which produce several electric pulse trains with a repetition rate slightly different one with each other. Each train is then addressed toward a single antenna. When transmitted the electromagnetic waves interact to produce an ultrafast orientation of the array emission lobe allowing scanning of large spatial field in less than 1μs.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130941543","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003307
M. Donelli
This work presents a real time method for through the wall imaging based on a simple transmission line model and a continuous wave radar. In particular, after a preliminary data preprocessing the radar traces are decoupled, and modeled as a set of transmission line segments interconnected together. The echoes present in the radar traces, which represents targets belonging the inaccessible domain, are modeled as mismatches in the transmission lines. Then a simple inversion procedure is considered to identifies the mismatches and consequently the unknown walls or objects characteristics. The knowledge of the walls and objects characteristics permits to remove or mitigate the image defocusing and location displacement of the targets (namely persons belonging the inaccessible scenario). The proposed method has been numerically assessed considering realistic scenarios and the obtained results are quite promising.
{"title":"A real time through the wall imaging method based on a simple transmission line model","authors":"M. Donelli","doi":"10.1109/CAMA.2014.7003307","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003307","url":null,"abstract":"This work presents a real time method for through the wall imaging based on a simple transmission line model and a continuous wave radar. In particular, after a preliminary data preprocessing the radar traces are decoupled, and modeled as a set of transmission line segments interconnected together. The echoes present in the radar traces, which represents targets belonging the inaccessible domain, are modeled as mismatches in the transmission lines. Then a simple inversion procedure is considered to identifies the mismatches and consequently the unknown walls or objects characteristics. The knowledge of the walls and objects characteristics permits to remove or mitigate the image defocusing and location displacement of the targets (namely persons belonging the inaccessible scenario). The proposed method has been numerically assessed considering realistic scenarios and the obtained results are quite promising.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133827372","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003326
G. Oliveri, E. Bekele, M. Carlin, L. Tenuti, A. Massa, J. Turpin, D. Werner
The application of a recently proposed Multi-Stage Quasi-Conformal Transformation Optics (QCTO) approach is considered for the design of metamaterial lenses capable of enhancing radiation properties of conformal arrays. The capability to achieve significantly simplified structures by means of square tile discretization is demonstrated. Selected numerical examples are reported to illustrate the effectiveness of tile-discretized lenses versus ideal QCTO arrangements.
{"title":"Extended QCTO for innovative antenna system designs","authors":"G. Oliveri, E. Bekele, M. Carlin, L. Tenuti, A. Massa, J. Turpin, D. Werner","doi":"10.1109/CAMA.2014.7003326","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003326","url":null,"abstract":"The application of a recently proposed Multi-Stage Quasi-Conformal Transformation Optics (QCTO) approach is considered for the design of metamaterial lenses capable of enhancing radiation properties of conformal arrays. The capability to achieve significantly simplified structures by means of square tile discretization is demonstrated. Selected numerical examples are reported to illustrate the effectiveness of tile-discretized lenses versus ideal QCTO arrangements.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115596048","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003355
F. Sarrazin, A. Sharaiha, P. Pouliguen, J. Chauveau, P. Potier
This paper presents the application of the Singularity Expansion Method (SEM) to model the measured field backscattered by a high gain helical antenna. The SEM allows modeling its late time response using poles which are theoretically independent of the incident wave angle. These poles can thus be used for antenna identification. One of the major limitations of the SEM is its complexity to extract the physical poles of the antenna, i.e. those which are independent of the direction. In this paper, we show that it is possible to estimate one physical set of poles by considering only the boresight direction. This poles' set allows modeling the late time measured field backscattered the antenna with a very high accuracy in both time and frequency domains. Then, these poles are compared to those extracted from other directions and we observe a very good stability of the poles regarding the incident wave angle.
{"title":"Helical antenna characterization using the singularity expansion method","authors":"F. Sarrazin, A. Sharaiha, P. Pouliguen, J. Chauveau, P. Potier","doi":"10.1109/CAMA.2014.7003355","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003355","url":null,"abstract":"This paper presents the application of the Singularity Expansion Method (SEM) to model the measured field backscattered by a high gain helical antenna. The SEM allows modeling its late time response using poles which are theoretically independent of the incident wave angle. These poles can thus be used for antenna identification. One of the major limitations of the SEM is its complexity to extract the physical poles of the antenna, i.e. those which are independent of the direction. In this paper, we show that it is possible to estimate one physical set of poles by considering only the boresight direction. This poles' set allows modeling the late time measured field backscattered the antenna with a very high accuracy in both time and frequency domains. Then, these poles are compared to those extracted from other directions and we observe a very good stability of the poles regarding the incident wave angle.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114877981","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003428
P. Kildal, A. A. Glazunov, J. Carlsson, Amir Majidzadeh
Autonomous (self-driving) cars will in a few years become a reality, driven by safety aspects. This will be made possible by reliable and secure wireless connections to the car via the wireless network, and directly from other vehicles in the close vicinity. Thereby OTA-testing becomes a big issue, both in multipath and Line-Of-Sight (LOS). The present paper proposes two compact and cost-effective test chambers that take account of the two limiting environments known as Rich Isotropic Multipath (RIMP) and Random-LOS. The randomness of the latter is associated with the unknown and arbitrarily distributed angle of arrival of the LOS in the horizontal plane, sometimes also having an unknown polarization, which thereby also become random.
{"title":"Cost-effective measurement setups for testing wireless communication to vehicles in reverberation chambers and anechoic chambers","authors":"P. Kildal, A. A. Glazunov, J. Carlsson, Amir Majidzadeh","doi":"10.1109/CAMA.2014.7003428","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003428","url":null,"abstract":"Autonomous (self-driving) cars will in a few years become a reality, driven by safety aspects. This will be made possible by reliable and secure wireless connections to the car via the wireless network, and directly from other vehicles in the close vicinity. Thereby OTA-testing becomes a big issue, both in multipath and Line-Of-Sight (LOS). The present paper proposes two compact and cost-effective test chambers that take account of the two limiting environments known as Rich Isotropic Multipath (RIMP) and Random-LOS. The randomness of the latter is associated with the unknown and arbitrarily distributed angle of arrival of the LOS in the horizontal plane, sometimes also having an unknown polarization, which thereby also become random.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130703902","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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