Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550109
Kerim A. Akel
Macroscopic parameters are the main part of Maxwell's equations and any electromagnetic (EM) endeavor. Over the years, numerous techniques were developed to arrive at these parameters. The proposed novel technique uses Maxwell's equations and Snell's law to arrive at an accurate method to measure these parameters.
{"title":"Novel technique for measuring the complex dielectric constant and permeability","authors":"Kerim A. Akel","doi":"10.1109/ANTEM.2016.7550109","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550109","url":null,"abstract":"Macroscopic parameters are the main part of Maxwell's equations and any electromagnetic (EM) endeavor. Over the years, numerous techniques were developed to arrive at these parameters. The proposed novel technique uses Maxwell's equations and Snell's law to arrive at an accurate method to measure these parameters.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127353623","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550110
Meng Zou, Jin Pan, Z. Shen
A frequency-reconfigurable water dielectric resonator antenna (DRA) with a wide tuning frequency range is presented in this paper. The design concept of the proposed antenna is based on combining a wideband feeding structure with a frequency-reconfigurable radiating structure. A water resonator contained by an acrylic box is used as the frequency-reconfigurable radiating structure. Meanwhile, a fixed conical probe is used as the wideband feeding structure to excite TE211y and TE121x modes of the rectangular water resonator. The operating frequency of the antenna can be easily tuned by changing the height of the water resonator. A prototype antenna is fabricated and measured results verify the proposed design concept. It is shown that the proposed antenna has a continuous tuning frequency range from 165 MHz to 700 MHz.
{"title":"Frequency-reconfigurable water dielectric resonator antenna","authors":"Meng Zou, Jin Pan, Z. Shen","doi":"10.1109/ANTEM.2016.7550110","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550110","url":null,"abstract":"A frequency-reconfigurable water dielectric resonator antenna (DRA) with a wide tuning frequency range is presented in this paper. The design concept of the proposed antenna is based on combining a wideband feeding structure with a frequency-reconfigurable radiating structure. A water resonator contained by an acrylic box is used as the frequency-reconfigurable radiating structure. Meanwhile, a fixed conical probe is used as the wideband feeding structure to excite TE211y and TE121x modes of the rectangular water resonator. The operating frequency of the antenna can be easily tuned by changing the height of the water resonator. A prototype antenna is fabricated and measured results verify the proposed design concept. It is shown that the proposed antenna has a continuous tuning frequency range from 165 MHz to 700 MHz.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115114998","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550225
Amna Ikram, J. Laurin
This paper presents the use of a high permittivity and high permeability magneto-dielectric material to reduce the height of a monopole antenna without sacrificing the desired bandwidth. A magneto-dielectric material of high permittivity and high permeability has been used as a loading element on a standard quarter wavelength monopole antenna. In our design, the magneto-dielectric material is placed on the top and the bottom of the antenna to achieve reduction in the resonant frequency. It is shown that a monopole designed at a frequency of 1.12GHz can have its resonance frequency shifted to 0.89GHz. Most of the known magneto-dielectric materials tend to be lossy. The radiation efficiency of loaded antenna is better than 60% over the matched impedance bandwidth.
{"title":"Reducing the height of a monopole antenna by using magneto dielectric material","authors":"Amna Ikram, J. Laurin","doi":"10.1109/ANTEM.2016.7550225","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550225","url":null,"abstract":"This paper presents the use of a high permittivity and high permeability magneto-dielectric material to reduce the height of a monopole antenna without sacrificing the desired bandwidth. A magneto-dielectric material of high permittivity and high permeability has been used as a loading element on a standard quarter wavelength monopole antenna. In our design, the magneto-dielectric material is placed on the top and the bottom of the antenna to achieve reduction in the resonant frequency. It is shown that a monopole designed at a frequency of 1.12GHz can have its resonance frequency shifted to 0.89GHz. Most of the known magneto-dielectric materials tend to be lossy. The radiation efficiency of loaded antenna is better than 60% over the matched impedance bandwidth.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125887010","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550236
M. Bevacqua, L. Crocco, L. Di Donato, R. Palmeri, T. Isernia
We briefly review the rationale of our `virtual experiments' approach to inverse scattering problems. The different resulting solution procedures, including very recent developments, are also introduced and summarized.
{"title":"A ‘virtual experiments’ setting for inverse scattering problems","authors":"M. Bevacqua, L. Crocco, L. Di Donato, R. Palmeri, T. Isernia","doi":"10.1109/ANTEM.2016.7550236","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550236","url":null,"abstract":"We briefly review the rationale of our `virtual experiments' approach to inverse scattering problems. The different resulting solution procedures, including very recent developments, are also introduced and summarized.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125115703","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550176
M. Zandvakili, H. Moghadas, D. Sameoto, P. Mousavi
This paper presents a mechanically tunable partially reflective surface (PRS) antenna for radiation pattern reconfiguration. This is a low-cost alternative to the traditional electronic tuning which utilizes switches/varactors. A dipole array PRS is implemented on a stretchable polymer-based layer. Stretching the layer can double the inter-element spacing of the unit cells, tune the reflection of the surface, and consequently reconfigure the antenna radiation pattern.
{"title":"Mechanically tunable periodic electromagnetic surface using stretchable polymer","authors":"M. Zandvakili, H. Moghadas, D. Sameoto, P. Mousavi","doi":"10.1109/ANTEM.2016.7550176","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550176","url":null,"abstract":"This paper presents a mechanically tunable partially reflective surface (PRS) antenna for radiation pattern reconfiguration. This is a low-cost alternative to the traditional electronic tuning which utilizes switches/varactors. A dipole array PRS is implemented on a stretchable polymer-based layer. Stretching the layer can double the inter-element spacing of the unit cells, tune the reflection of the surface, and consequently reconfigure the antenna radiation pattern.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124417762","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550168
Maryam Razmhosseini, R. Vaughan
This paper provides a comparison between different near-field measurement techniques for antenna gain and directivity estimations. Several gain measurement techniques exist including comparison gain and direct gain, which have their own advantages and disadvantages in terms of accuracy, cost and measurement time. In this study, the comparison gain technique is used. In addition, three different near-field measurement methods including planar, cylindrical and spherical have been compared for antenna gain and directivity estimation.
{"title":"Peak gain and directivity estimation accuracy from pattern measurement","authors":"Maryam Razmhosseini, R. Vaughan","doi":"10.1109/ANTEM.2016.7550168","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550168","url":null,"abstract":"This paper provides a comparison between different near-field measurement techniques for antenna gain and directivity estimations. Several gain measurement techniques exist including comparison gain and direct gain, which have their own advantages and disadvantages in terms of accuracy, cost and measurement time. In this study, the comparison gain technique is used. In addition, three different near-field measurement methods including planar, cylindrical and spherical have been compared for antenna gain and directivity estimation.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123288761","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550171
N. Nguyen-Trong, L. Hall, C. Fumeaux
Recently, a method of pattern synthesis for leaky-wave antennas (LWAs) using global optimization has been proposed by the authors. This technique utilizes a lossy transmissionline model for nonuniform continuous-source LWAs, and it was shown that taking into account reflections along the line provides a significant accuracy improvement compared to the traditional formula. In this paper, further application on arbitrary pattern synthesis will be investigated with an example of optimization under a specific pattern mask for a Half-Mode Substrate-Integrated Waveguide LWA. The cost function and optimization setup are adapted accordingly. The obtained results further demonstrate the applicability and flexibility of the method in the optimization of this type of antennas.
{"title":"Pattern synthesis with angular mask for leaky-wave antennas","authors":"N. Nguyen-Trong, L. Hall, C. Fumeaux","doi":"10.1109/ANTEM.2016.7550171","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550171","url":null,"abstract":"Recently, a method of pattern synthesis for leaky-wave antennas (LWAs) using global optimization has been proposed by the authors. This technique utilizes a lossy transmissionline model for nonuniform continuous-source LWAs, and it was shown that taking into account reflections along the line provides a significant accuracy improvement compared to the traditional formula. In this paper, further application on arbitrary pattern synthesis will be investigated with an example of optimization under a specific pattern mask for a Half-Mode Substrate-Integrated Waveguide LWA. The cost function and optimization setup are adapted accordingly. The obtained results further demonstrate the applicability and flexibility of the method in the optimization of this type of antennas.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131393160","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550152
M. A. Moharram, A. Kishk
The Random Auxiliary Sources (RAS) method is used to solve the electromagnetic scattering problem from structures with impedance boundary conditions. Basically, the RAS method exploits a uniformly distributed random infinitesimal electric/magnetic dipoles as the expansion function, where their unknown amplitudes are used to directly satisfy the boundary conditions. Typically, the flexibility of the formulation and implementation of the developed RAS method enables an easy adaptation for arbitrary boundary conditions. The results of the proposed implementation are compared to analytical expressions for canonical geometries as well as the full-wave analysis of HFSS of several cases.
{"title":"The impedance boundary condition implementation for the 3D random auxiliary sources method","authors":"M. A. Moharram, A. Kishk","doi":"10.1109/ANTEM.2016.7550152","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550152","url":null,"abstract":"The Random Auxiliary Sources (RAS) method is used to solve the electromagnetic scattering problem from structures with impedance boundary conditions. Basically, the RAS method exploits a uniformly distributed random infinitesimal electric/magnetic dipoles as the expansion function, where their unknown amplitudes are used to directly satisfy the boundary conditions. Typically, the flexibility of the formulation and implementation of the developed RAS method enables an easy adaptation for arbitrary boundary conditions. The results of the proposed implementation are compared to analytical expressions for canonical geometries as well as the full-wave analysis of HFSS of several cases.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130547432","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550201
A. Rashidian, L. Shafai, C. Shafai, M. Sobocinski, J. Perantie, J. Juuti, H. Jantunen
In this paper we propose an approach for designing compact all-dielectric passive microwave/mm-wave components. Our design is based on an extremely thin layer of high-permittivity dielectric which creates a large permittivity contrast with its adjacent dielectric/substrate and can be built using two-dimensional printing fabrications. Couplers, transmission lines, and various antennas such as multimode, multisegment, and wideband antennas are investigated, fabricated, and discussed.
{"title":"Development of planar dielectric passive microwave circuits and antennas","authors":"A. Rashidian, L. Shafai, C. Shafai, M. Sobocinski, J. Perantie, J. Juuti, H. Jantunen","doi":"10.1109/ANTEM.2016.7550201","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550201","url":null,"abstract":"In this paper we propose an approach for designing compact all-dielectric passive microwave/mm-wave components. Our design is based on an extremely thin layer of high-permittivity dielectric which creates a large permittivity contrast with its adjacent dielectric/substrate and can be built using two-dimensional printing fabrications. Couplers, transmission lines, and various antennas such as multimode, multisegment, and wideband antennas are investigated, fabricated, and discussed.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121108396","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550198
P. Juyal, L. Shafai
A novel low profile, high gain circular microstrip antenna configuration is presented. The fundamental working principle is the superposition of the radiated fields by TM12 and TM14 mode of thin circular microstrip. The proposed antenna is a single layer, inexpensive and easy to design. Owing to the high input impedance, a capacitive feed technique has been used to match the antenna. The antenna has a maximum broadside gain close to 16dBi with SLL of ×16dB.
{"title":"High gain dual mode microstrip disc antenna configuration","authors":"P. Juyal, L. Shafai","doi":"10.1109/ANTEM.2016.7550198","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550198","url":null,"abstract":"A novel low profile, high gain circular microstrip antenna configuration is presented. The fundamental working principle is the superposition of the radiated fields by TM12 and TM14 mode of thin circular microstrip. The proposed antenna is a single layer, inexpensive and easy to design. Owing to the high input impedance, a capacitive feed technique has been used to match the antenna. The antenna has a maximum broadside gain close to 16dBi with SLL of ×16dB.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"42 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120865369","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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