Pub Date : 2014-12-01DOI: 10.1109/MMS.2014.7088994
H. Errifi, A. Baghdad, A. Badri, A. Sahel
Electromagnetic Band-Gap (EBG) structures are popular and efficient techniques for microwave applications; they are periodic metallic or dielectric materials. EBG may be combined with microstrip patch antenna to increase the directivity, the radiation efficiency and/or to suppress surface waves, to reduce the side lobes of the radiation pattern and to increase the bandwidth. In this paper, we study the influence of Unidimensionnel Electromagnetic Band Gap structure (1D-EBG) on the performances of an aperture coupled rectangular patch antenna. This 1D-EBG is chosen as two similar dielectric layers disposed above the patch. The return loss, radiation pattern, and directivity are studied using HFSS software. The simulation results show that the gain, directivity and S11 parameter of the antenna with dielectric superstrate layers are increased at X band (8-12GHz). Compared with the patch feed with the same aperture size but without dielectric layers, the performance of the proposed antenna is improved obviously.
{"title":"Directivity enhancement of aperture coupled microstrip patch antenna using two layers dielectric superstrate","authors":"H. Errifi, A. Baghdad, A. Badri, A. Sahel","doi":"10.1109/MMS.2014.7088994","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088994","url":null,"abstract":"Electromagnetic Band-Gap (EBG) structures are popular and efficient techniques for microwave applications; they are periodic metallic or dielectric materials. EBG may be combined with microstrip patch antenna to increase the directivity, the radiation efficiency and/or to suppress surface waves, to reduce the side lobes of the radiation pattern and to increase the bandwidth. In this paper, we study the influence of Unidimensionnel Electromagnetic Band Gap structure (1D-EBG) on the performances of an aperture coupled rectangular patch antenna. This 1D-EBG is chosen as two similar dielectric layers disposed above the patch. The return loss, radiation pattern, and directivity are studied using HFSS software. The simulation results show that the gain, directivity and S11 parameter of the antenna with dielectric superstrate layers are increased at X band (8-12GHz). Compared with the patch feed with the same aperture size but without dielectric layers, the performance of the proposed antenna is improved obviously.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124937229","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088996
V. Radonić, V. Crnojević-Bengin, A. Baskakova, I. Vendik
In this paper, novel multilayer microstrip diplexer is presented for ISM band at 2.45 GHz and WiFi at 3.6 GHz. The receiver and transmitter filters of the diplexer are implemented using square loop dual-mode resonators. First, we propose the planar diplexer realized in one single PCB layer. In that way, the characteristic in both bands can be independently controlled by changing the resonator dimensions. Moreover, several transmission zeros are located at the passband edges resulting in improved passband selectivity. The multilayer modification is proposed as transition from coplanar to microstrip architecture in order to obtain high isolation between filters in different layers. By using the multilayer design the size reduction and wide passbands are achieved with isolation better than 20 dB.
{"title":"Multilayer microwave diplexers based on dual-mode resonators for ISM/WiFi bands","authors":"V. Radonić, V. Crnojević-Bengin, A. Baskakova, I. Vendik","doi":"10.1109/MMS.2014.7088996","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088996","url":null,"abstract":"In this paper, novel multilayer microstrip diplexer is presented for ISM band at 2.45 GHz and WiFi at 3.6 GHz. The receiver and transmitter filters of the diplexer are implemented using square loop dual-mode resonators. First, we propose the planar diplexer realized in one single PCB layer. In that way, the characteristic in both bands can be independently controlled by changing the resonator dimensions. Moreover, several transmission zeros are located at the passband edges resulting in improved passband selectivity. The multilayer modification is proposed as transition from coplanar to microstrip architecture in order to obtain high isolation between filters in different layers. By using the multilayer design the size reduction and wide passbands are achieved with isolation better than 20 dB.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125069405","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088934
N. Leder, Thomas Faseth, Henri Ruotsalainen, H. Arthaber
In this paper a methodology for identifying broadband nonlinear models for digital switched mode RF power amplifiers is presented. This can be accomplished by training a black box model by observing an amplifier's output waveform in time domain. It is demonstrated that the presented method is feasible for using a simple and relatively short excitation sequence. The required model-complexity for a given amplifier is unknown in general, therefore, a testing method is presented in order to select a model of sufficient complexity. This is necessary since selecting a model solely on how well it reproduces the training sequence has been proven not to be sufficient. A digital power amplifier lab-setup serves as test platform in order to verify the validity of the so derived model.
{"title":"Nonlinear modeling and model-validation for digital switched mode RF power amplifiers","authors":"N. Leder, Thomas Faseth, Henri Ruotsalainen, H. Arthaber","doi":"10.1109/MMS.2014.7088934","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088934","url":null,"abstract":"In this paper a methodology for identifying broadband nonlinear models for digital switched mode RF power amplifiers is presented. This can be accomplished by training a black box model by observing an amplifier's output waveform in time domain. It is demonstrated that the presented method is feasible for using a simple and relatively short excitation sequence. The required model-complexity for a given amplifier is unknown in general, therefore, a testing method is presented in order to select a model of sufficient complexity. This is necessary since selecting a model solely on how well it reproduces the training sequence has been proven not to be sufficient. A digital power amplifier lab-setup serves as test platform in order to verify the validity of the so derived model.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116895360","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088985
Layla Aziz, S. Raghay, A. Jamali
Wireless Sensor Networks (WSNs) have attracted many researches. Wireless Sensor Networks (WSNs) are an emerging technology used for various applications such as military surveillance, emergency situations, habitat monitoring, automation, agriculture, and health care. Energy efficiency is the major challenging issue In wireless sensor networks as it affects the network lifetime and stability. In this paper, we propose a new improved algorithm of LEACH protocol for WSN based on distance and the total energy of clusters to minimize the energy consumption of nodes and extend the life of the network.
{"title":"A new improved algorithm of leach protocol for wireless sensor networks","authors":"Layla Aziz, S. Raghay, A. Jamali","doi":"10.1109/MMS.2014.7088985","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088985","url":null,"abstract":"Wireless Sensor Networks (WSNs) have attracted many researches. Wireless Sensor Networks (WSNs) are an emerging technology used for various applications such as military surveillance, emergency situations, habitat monitoring, automation, agriculture, and health care. Energy efficiency is the major challenging issue In wireless sensor networks as it affects the network lifetime and stability. In this paper, we propose a new improved algorithm of LEACH protocol for WSN based on distance and the total energy of clusters to minimize the energy consumption of nodes and extend the life of the network.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129051190","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088982
Seif Naoui, A. Gharsallah
The article in hand deals with a new approach regarding the technique of miniaturization and the improvement of antennas done by the incorporation of metamaterials. We propose a new approach is on improving the frequency characteristics and reduce size of the antenna. This technique is based on the association with this element resonant two split rings resonator. The parameters considered in this work are the resonant frequency, return loss, bandwidth, radiation pattern, gain and the electromagnetic field and the current delivered by the proposed antenna. All simulation results are done by CST software.
{"title":"Improved microstrip dipole antenna by using metamaterials for RFID technology","authors":"Seif Naoui, A. Gharsallah","doi":"10.1109/MMS.2014.7088982","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088982","url":null,"abstract":"The article in hand deals with a new approach regarding the technique of miniaturization and the improvement of antennas done by the incorporation of metamaterials. We propose a new approach is on improving the frequency characteristics and reduce size of the antenna. This technique is based on the association with this element resonant two split rings resonator. The parameters considered in this work are the resonant frequency, return loss, bandwidth, radiation pattern, gain and the electromagnetic field and the current delivered by the proposed antenna. All simulation results are done by CST software.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128927119","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088973
Noha Al Majid, S. Mazer, M. El Bekkali, C. Algani
This paper presents a V-band Low Noise Amplifier (LNA) that uses a cascode configuration. This LNA will be used as a part of a WPAN (Wirless Personal Area Network) receiver in the millimeter-wave band at 60 GHz. This low noise amplifier is designed according to the MMIC technology (Monolithic Microwave Integrated Circuit) in PH15 process from UMS foundry and uses a 0.15 μm GaAs PHEMT (Pseudomorphic High Electron Mobility Transistor). The particularity of this LNA compared to other LNAs in literature is its very low noise figure which is equal to 1dB and its high gain which is about 23 dB. An input return loss of -6.61 dB and an output return loss of -11.26 dB are also achieved by this LNA.
{"title":"Design of a V-band MMIC LNA for WPAN applications around 60 GHz","authors":"Noha Al Majid, S. Mazer, M. El Bekkali, C. Algani","doi":"10.1109/MMS.2014.7088973","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088973","url":null,"abstract":"This paper presents a V-band Low Noise Amplifier (LNA) that uses a cascode configuration. This LNA will be used as a part of a WPAN (Wirless Personal Area Network) receiver in the millimeter-wave band at 60 GHz. This low noise amplifier is designed according to the MMIC technology (Monolithic Microwave Integrated Circuit) in PH15 process from UMS foundry and uses a 0.15 μm GaAs PHEMT (Pseudomorphic High Electron Mobility Transistor). The particularity of this LNA compared to other LNAs in literature is its very low noise figure which is equal to 1dB and its high gain which is about 23 dB. An input return loss of -6.61 dB and an output return loss of -11.26 dB are also achieved by this LNA.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127910022","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088958
F. Z. Hanin, L. Setti
The development of wireless technology in the telecommunications field requires the miniaturization of patch antennas. Several methods are used to achieve this objective. In this work, our process is to introduce anisotropic materials such as ferrites in the design of such antennas. The high refractive index of ferrite at microwave frequencies allows reducing of the dimensions of the printed antenna. Therefore, we find that ferrite films are used more widely in the propagation of electromagnetic waves for various kinds of microwave devices. To investigate the importance of the inclusion of ferrite films on the patch antenna at the resonant frequency of the antenna, and their effect on the performance of the patch antenna, we made a comparison between a patch antenna with a dielectric substrate, and a patch antenna loaded with thin layers of demagnetized ferrite (high permeability scalar).
{"title":"Performance of patch antenna loaded of ferrites films","authors":"F. Z. Hanin, L. Setti","doi":"10.1109/MMS.2014.7088958","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088958","url":null,"abstract":"The development of wireless technology in the telecommunications field requires the miniaturization of patch antennas. Several methods are used to achieve this objective. In this work, our process is to introduce anisotropic materials such as ferrites in the design of such antennas. The high refractive index of ferrite at microwave frequencies allows reducing of the dimensions of the printed antenna. Therefore, we find that ferrite films are used more widely in the propagation of electromagnetic waves for various kinds of microwave devices. To investigate the importance of the inclusion of ferrite films on the patch antenna at the resonant frequency of the antenna, and their effect on the performance of the patch antenna, we made a comparison between a patch antenna with a dielectric substrate, and a patch antenna loaded with thin layers of demagnetized ferrite (high permeability scalar).","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130145448","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088955
H. Oraizi, S. Hedayati
The objective of this paper is to design a microstrip fractal dipole antenna for multi-band applications in the UWB systems incorporating three notch bands. The Sierpinski, Hilbert and Giuseppe Peano fractals are used in different parts of the antenna structure to obtain the desire characteristics. The computer simulations of the designed antenna and the measurements of the fabricated prototype antenna for its input return loss, radiation patterns and gain indicate that the designed antenna has achieved its specifications for miniaturization, compactness and multiband applications in a simple structure. It has also achieved good impedance matching at its input, which is verified by its input return loss. The proposed antenna is thus suitable for UWB applications, such as wireless and mobile systems.
{"title":"Microstrip multiband fractal dipole antennas using the combination of Sierpinski, Hilbert and Giuseppe Peano fractals","authors":"H. Oraizi, S. Hedayati","doi":"10.1109/MMS.2014.7088955","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088955","url":null,"abstract":"The objective of this paper is to design a microstrip fractal dipole antenna for multi-band applications in the UWB systems incorporating three notch bands. The Sierpinski, Hilbert and Giuseppe Peano fractals are used in different parts of the antenna structure to obtain the desire characteristics. The computer simulations of the designed antenna and the measurements of the fabricated prototype antenna for its input return loss, radiation patterns and gain indicate that the designed antenna has achieved its specifications for miniaturization, compactness and multiband applications in a simple structure. It has also achieved good impedance matching at its input, which is verified by its input return loss. The proposed antenna is thus suitable for UWB applications, such as wireless and mobile systems.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"499 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133273703","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 : 2014-12-01DOI: 10.1109/MMS.2014.7089000
Hafssaa Latioui, O. Aghzout, A. Naghar, A. Vázquez Alejos, M. García Sánchez, M. Essaaidi
On the one hand this paper presents a theoretical method to predict the responses for the parallel coupled microstrip bandpass filters, and on the other hand proposes a new MATLAB simulation interface including all parameters design procedure to predict the filter responses. The main advantage of this developed interface calculator is to enable researchers and engineers to design and determine easily all parameters of the PCMBPF responses with high accuracy and very small CPU time. To validate the numerical method and the corresponding new interface calculator, two PCMBP filters for wireless communications are designed and compared with the commercial electromagnetic CST simulator and the fabricated prototype respectively. Measured results show good agreement with those obtained by numerical method and simulations.
{"title":"A simple graphical calculator based on a new synthesis formulas to design a bandpass filters for wireless applications","authors":"Hafssaa Latioui, O. Aghzout, A. Naghar, A. Vázquez Alejos, M. García Sánchez, M. Essaaidi","doi":"10.1109/MMS.2014.7089000","DOIUrl":"https://doi.org/10.1109/MMS.2014.7089000","url":null,"abstract":"On the one hand this paper presents a theoretical method to predict the responses for the parallel coupled microstrip bandpass filters, and on the other hand proposes a new MATLAB simulation interface including all parameters design procedure to predict the filter responses. The main advantage of this developed interface calculator is to enable researchers and engineers to design and determine easily all parameters of the PCMBPF responses with high accuracy and very small CPU time. To validate the numerical method and the corresponding new interface calculator, two PCMBP filters for wireless communications are designed and compared with the commercial electromagnetic CST simulator and the fabricated prototype respectively. Measured results show good agreement with those obtained by numerical method and simulations.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132080069","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 : 2014-12-01DOI: 10.1109/MMS.2014.7088785
F. Z. Siabah, F. Grine, M. T. Benhabiles, M. L. Riabi
A class of pulses with strongly decaying spectrum was recently introduced as piecewise basis functions for the SDA applied to the microstrip line. Further new features are investigated in this paper regarding the Maxwell Equations compliance and the spurious mode avoidance.
{"title":"The Spectral Domain Approach — Maxwell equations compliant basis functions with strongly decaying spectrum","authors":"F. Z. Siabah, F. Grine, M. T. Benhabiles, M. L. Riabi","doi":"10.1109/MMS.2014.7088785","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088785","url":null,"abstract":"A class of pulses with strongly decaying spectrum was recently introduced as piecewise basis functions for the SDA applied to the microstrip line. Further new features are investigated in this paper regarding the Maxwell Equations compliance and the spurious mode avoidance.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"38 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113978728","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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