Pub Date : 2014-12-01DOI: 10.1109/MMS.2014.7088987
A. Zakriti, N. Touhami, M. Essaaidi
In this paper, a design and analysis of compact coplanar waveguide-fed ultra wideband antenna is presented. The antenna design exhibits a very wide operating bandwidth of 14.3GHz with a return loss better than 10dB in the frequency range from 3.7GHz to 18GHz. The gain of the proposed antenna is around 4.8dBi. This antenna configuration would be useful for UWB indoor application as it is easy to fabricate and integrate with RF circuitry. All simulations in this work were carried out by using the electromagnetic software.
{"title":"Design of a compact CPW ultra-wideband antenna","authors":"A. Zakriti, N. Touhami, M. Essaaidi","doi":"10.1109/MMS.2014.7088987","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088987","url":null,"abstract":"In this paper, a design and analysis of compact coplanar waveguide-fed ultra wideband antenna is presented. The antenna design exhibits a very wide operating bandwidth of 14.3GHz with a return loss better than 10dB in the frequency range from 3.7GHz to 18GHz. The gain of the proposed antenna is around 4.8dBi. This antenna configuration would be useful for UWB indoor application as it is easy to fabricate and integrate with RF circuitry. All simulations in this work were carried out by using the electromagnetic software.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"24 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":"124123758","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.2014.7088938
J. Naqui, G. Zamora, F. Paredes, J. Bonache, F. Martín
Metamaterial transmission lines are artificial lines implemented by loading a host (ordinary) line with reactive elements. Due to the presence of these additional elements, these lines exhibit further design flexibility, as compared to ordinary lines. Thus, it is possible the design of microwave components with high performance, with novel functionalities and/or with reduced size, on the basis of the controllability of the characteristic impedance and dispersion of the constitutive lines (impedance and dispersion engineering). In this work, it is shown that metamaterial transmission lines can be applied to many different scenarios within wireless communications, sensing, and radiofrequency identification (RFID), and some recent applications are pointed out. This includes multiband devices and antennas, novel sensors based on symmetry properties, and novel tag concepts for UHF-RFID and chipless RFID.
{"title":"Metamaterial transmission lines for wireless communications, sensing and RFID","authors":"J. Naqui, G. Zamora, F. Paredes, J. Bonache, F. Martín","doi":"10.1109/MMS.2014.7088938","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088938","url":null,"abstract":"Metamaterial transmission lines are artificial lines implemented by loading a host (ordinary) line with reactive elements. Due to the presence of these additional elements, these lines exhibit further design flexibility, as compared to ordinary lines. Thus, it is possible the design of microwave components with high performance, with novel functionalities and/or with reduced size, on the basis of the controllability of the characteristic impedance and dispersion of the constitutive lines (impedance and dispersion engineering). In this work, it is shown that metamaterial transmission lines can be applied to many different scenarios within wireless communications, sensing, and radiofrequency identification (RFID), and some recent applications are pointed out. This includes multiband devices and antennas, novel sensors based on symmetry properties, and novel tag concepts for UHF-RFID and chipless RFID.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"28 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":"126376445","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.2014.7088977
A. Naghar, O. Aghzout, M. Essaaidi, A. Alejos, M. Sánchez, F. Falcone
In this paper, a low-cost compact microstrip ultra wideband antenna for satellite and radar communication systems with filtering properties resulting multiband characteristics is presented. The ultra wideband antenna consists of a modified rectangular radiating element with deformed ground plane which provides a wide bandwidth from 5 to 16 GHz. The U-shaped slots are introduced in the radiating patch to obtain the tri-band frequency response covering C, X and Ku bands separately. The frequency bands achieving are 4.9-7 GHz, 7.92-11.08 GHz and 11.85-15.94 GHz. The proposed antennas are successfully simulated and performed using CST MWs and experimental validation are presented to demonstrate the performance of these antennas.
{"title":"Ultra wideband and tri-band antennas for satellite applications at C-, X-, and Ku bands","authors":"A. Naghar, O. Aghzout, M. Essaaidi, A. Alejos, M. Sánchez, F. Falcone","doi":"10.1109/MMS.2014.7088977","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088977","url":null,"abstract":"In this paper, a low-cost compact microstrip ultra wideband antenna for satellite and radar communication systems with filtering properties resulting multiband characteristics is presented. The ultra wideband antenna consists of a modified rectangular radiating element with deformed ground plane which provides a wide bandwidth from 5 to 16 GHz. The U-shaped slots are introduced in the radiating patch to obtain the tri-band frequency response covering C, X and Ku bands separately. The frequency bands achieving are 4.9-7 GHz, 7.92-11.08 GHz and 11.85-15.94 GHz. The proposed antennas are successfully simulated and performed using CST MWs and experimental validation are presented to demonstrate the performance of these antennas.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"05 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":"127194837","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.2014.7088999
M. Ababou, R. Elkouch, M. Bellafkih, Nabil Ababou
Delay Tolerant Network is a network that supports the intermittent connections between nodes. There is either no end to end connection between the source and the destination or the connections are infrequent and very short in terms of delay. The mechanism called store-carry-forward cames to solve this problem, since the nodes are dynamic and facilitate the meeting of the other mobil nodes so they can receive and/or deliver messages to their final destinations. Hence, traditional routing which is based on the principle of end to end is no longer practical for this kind of environment. Different routing protocols have been proposed for DTN environment, such as Epidemic, Spray and Wait and ProPHET. The common objective of these routing protocols is the increasing of the delivery ratio of messages with a minimal overhead. This paper proposes a routing strategy named AntProPHET, which combines probabilistic metric of ProPHET routing protocol and Ant colony optimization algorithm which is inspired by the foraging behavior of Ants and their ability to find the shortest path from a food source and their nest. We use the ONE simulator in order to verify the performance of AntProPHET compared to the ProPHET. Simulation results will show that the proposed AntProPHET approach improves significantly the delivery ratio of messages and reduce the overhead generated. So, our approach AntProPHET is a good applicantion to be used in DTN environments.
容延迟网络是一种支持节点间间歇连接的网络。在源和目标之间没有端到端连接，或者连接不频繁，并且在延迟方面非常短。由于节点是动态的，并且促进了其他移动节点的会议，因此它们可以接收和/或将消息传递到最终目的地，因此称为存储-forward的机制可以解决这个问题。因此，基于端到端原则的传统路由在这种环境下已经不再适用。针对DTN环境提出了不同的路由协议，如Epidemic、Spray and Wait和ProPHET。这些路由协议的共同目标是以最小的开销增加消息的传递率。本文根据蚂蚁的觅食行为以及蚂蚁从食物源到巢穴寻找最短路径的能力，提出了一种将ProPHET路由协议的概率度量与蚁群优化算法相结合的路由策略AntProPHET。我们使用ONE模拟器来验证AntProPHET与ProPHET的性能。仿真结果表明，提出的AntProPHET方法显著提高了消息的传递率，减少了产生的开销。因此，我们的方法AntProPHET是一个很好的应用程序，在DTN环境中使用。
{"title":"AntProPHET: A new routing protocol for delay tolerant networks","authors":"M. Ababou, R. Elkouch, M. Bellafkih, Nabil Ababou","doi":"10.1109/MMS.2014.7088999","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088999","url":null,"abstract":"Delay Tolerant Network is a network that supports the intermittent connections between nodes. There is either no end to end connection between the source and the destination or the connections are infrequent and very short in terms of delay. The mechanism called store-carry-forward cames to solve this problem, since the nodes are dynamic and facilitate the meeting of the other mobil nodes so they can receive and/or deliver messages to their final destinations. Hence, traditional routing which is based on the principle of end to end is no longer practical for this kind of environment. Different routing protocols have been proposed for DTN environment, such as Epidemic, Spray and Wait and ProPHET. The common objective of these routing protocols is the increasing of the delivery ratio of messages with a minimal overhead. This paper proposes a routing strategy named AntProPHET, which combines probabilistic metric of ProPHET routing protocol and Ant colony optimization algorithm which is inspired by the foraging behavior of Ants and their ability to find the shortest path from a food source and their nest. We use the ONE simulator in order to verify the performance of AntProPHET compared to the ProPHET. Simulation results will show that the proposed AntProPHET approach improves significantly the delivery ratio of messages and reduce the overhead generated. So, our approach AntProPHET is a good applicantion to be used in DTN environments.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"172 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":"124199828","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.2014.7088961
I. Halkhams, W. El Hamdani, S. Mazer, M. El Bekkali
This paper relates a comparative study of an active filter based on active inductor. The active filter was designed in two technologies; AMS_SiMOSFET and UMS_pHEMT. Main characteristics of the filters such as input impedance, power gain and quality factor are discussed and a synthesis is given on high frequency performance of the two technologies based on channel mobility, CutOff frequency and density of states of each. We show that the filters can be very selective and that every technology operates at a special frequency band.
{"title":"Comparative study between CMOS and pHEMT active filter","authors":"I. Halkhams, W. El Hamdani, S. Mazer, M. El Bekkali","doi":"10.1109/MMS.2014.7088961","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088961","url":null,"abstract":"This paper relates a comparative study of an active filter based on active inductor. The active filter was designed in two technologies; AMS_SiMOSFET and UMS_pHEMT. Main characteristics of the filters such as input impedance, power gain and quality factor are discussed and a synthesis is given on high frequency performance of the two technologies based on channel mobility, CutOff frequency and density of states of each. We show that the filters can be very selective and that every technology operates at a special frequency band.","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":"121224452","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.2014.7088967
R. K. Kwate, B. Elmagroud, C. Taybi, A. Ziyyat, D. Picard, M. Moutaouekkil
The personal radiofrequency dosimeters are increasingly used for the workers exposure estimation to the electromagnetic radiations in terms of reference level of the fields. The presence of the human body at the vicinity of dosimeter compromising its measurement accuracy. In this paper, the study of interaction between personal radiofrequency dosimeter and human body is presented. Firstly, we treat the error introduced by the presence of the body and an approach to reducing this impact by adding elements in the dosimeter structure. Indeed, by introducing a metal ground plane and optimizing the height of antenna-ground plane, we can estimate at 10% close the level of incidental field, that is to say a considerable reduction impact of the body on the dosimeter. We also study the stability of the intrinsic characteristics of dosimeter (isotropy and front to back ratio). Different simulations were performed in the GSM 900 band with the finite integration technique. In the context of the design of worn-body radiofrequency dosimeter it's very useful to master these interaction results.
{"title":"Interaction between human body and personal radiofrequency dosimeter: Effects of the metal plate presence","authors":"R. K. Kwate, B. Elmagroud, C. Taybi, A. Ziyyat, D. Picard, M. Moutaouekkil","doi":"10.1109/MMS.2014.7088967","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088967","url":null,"abstract":"The personal radiofrequency dosimeters are increasingly used for the workers exposure estimation to the electromagnetic radiations in terms of reference level of the fields. The presence of the human body at the vicinity of dosimeter compromising its measurement accuracy. In this paper, the study of interaction between personal radiofrequency dosimeter and human body is presented. Firstly, we treat the error introduced by the presence of the body and an approach to reducing this impact by adding elements in the dosimeter structure. Indeed, by introducing a metal ground plane and optimizing the height of antenna-ground plane, we can estimate at 10% close the level of incidental field, that is to say a considerable reduction impact of the body on the dosimeter. We also study the stability of the intrinsic characteristics of dosimeter (isotropy and front to back ratio). Different simulations were performed in the GSM 900 band with the finite integration technique. In the context of the design of worn-body radiofrequency dosimeter it's very useful to master these interaction results.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"40 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":"116513588","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.2014.7088927
Amrita Chakraborty, B. Gupta
RF MEMS based 180° phase shifter is proposed which employs a novel fractal geometry based structure. This paper displays in detail the design and fabrication steps conducted on the RF MEMS (Radio Frequency Micro Electro Mechanical Systems) based 180° phase shifter. The novelty of the present work lies in the fact that the entire phase shifter structure follows a unique space-filling curve known as the Peano Curve of the 2nd iteration. The proposed device leads to a generation of 180° phase shift at a frequency of 15GHz and occupies a space of 1mm×0.88mm only as compared to previously reported designs which occupy a space of 8.39mm×0.49mm, with acceptable performance along the entire range of frequencies of interest.
{"title":"A novel space-filling curve based 180° RF MEMS DMTL phase shifter","authors":"Amrita Chakraborty, B. Gupta","doi":"10.1109/MMS.2014.7088927","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088927","url":null,"abstract":"RF MEMS based 180° phase shifter is proposed which employs a novel fractal geometry based structure. This paper displays in detail the design and fabrication steps conducted on the RF MEMS (Radio Frequency Micro Electro Mechanical Systems) based 180° phase shifter. The novelty of the present work lies in the fact that the entire phase shifter structure follows a unique space-filling curve known as the Peano Curve of the 2nd iteration. The proposed device leads to a generation of 180° phase shift at a frequency of 15GHz and occupies a space of 1mm×0.88mm only as compared to previously reported designs which occupy a space of 8.39mm×0.49mm, with acceptable performance along the entire range of frequencies of interest.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"9 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":"116451494","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.2014.7088928
Ali Othman, R. Barrak, M. Mabrouk
The tunable RF filters are considered as a promising solution which can be implemented in the front-end RF of Software Defined Radio (SDR) receivers to make them suitable for multistandard wireless applications in a cost-effective and power-efficient way. In this paper, a tunable RF filter based on Dual-Behaviour Resonators (DBR) topology and excited by varactors as tuning components is presented. This filter is designed to operate in next generation transceivers using GSM, UMTS, Wi-Fi and LTE wireless standards. Special attention will be paid to the varactor model and its impact on the filter performance. S parameters simulations show a good agreement with the standards specifications in terms of center frequencies and bandwidths.
{"title":"A tunable RF filter for multistandard GSM/UMTS/WiFi/LTE receiver","authors":"Ali Othman, R. Barrak, M. Mabrouk","doi":"10.1109/MMS.2014.7088928","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088928","url":null,"abstract":"The tunable RF filters are considered as a promising solution which can be implemented in the front-end RF of Software Defined Radio (SDR) receivers to make them suitable for multistandard wireless applications in a cost-effective and power-efficient way. In this paper, a tunable RF filter based on Dual-Behaviour Resonators (DBR) topology and excited by varactors as tuning components is presented. This filter is designed to operate in next generation transceivers using GSM, UMTS, Wi-Fi and LTE wireless standards. Special attention will be paid to the varactor model and its impact on the filter performance. S parameters simulations show a good agreement with the standards specifications in terms of center frequencies and bandwidths.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"62 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":"123687303","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.2014.7088981
M. Yasir, P. Savi, M. H. Yahya, Mauro Giorcelli, A. Tagliaferro
In this work, the electrical characteristics of nanocomposites obtained by dispersing multi walled carbon nanotubes in epoxy resins are investigated. The morphological characterization, samples preparation and dispersion of MWCNTs inside the resin are discussed. The complex permittivity of nanocomposites (in the range 100 kHz-12MHz and 1-18 GHz) is measured and its value discussed in the light of filler percentage and MWCNTs characteristics. The shielding effectiveness (SE) is computed for different weight percentage of MWCNTs.
{"title":"Wide band characterization of MWCNTs Composites based on epoxy resin: Complex permittivity and shielding effectiveness","authors":"M. Yasir, P. Savi, M. H. Yahya, Mauro Giorcelli, A. Tagliaferro","doi":"10.1109/MMS.2014.7088981","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088981","url":null,"abstract":"In this work, the electrical characteristics of nanocomposites obtained by dispersing multi walled carbon nanotubes in epoxy resins are investigated. The morphological characterization, samples preparation and dispersion of MWCNTs inside the resin are discussed. The complex permittivity of nanocomposites (in the range 100 kHz-12MHz and 1-18 GHz) is measured and its value discussed in the light of filler percentage and MWCNTs characteristics. The shielding effectiveness (SE) is computed for different weight percentage of MWCNTs.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"241 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":"122528877","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.2014.7088942
B. Pichler, N. Leder, Thomas Faseth, H. Arthaber
This work outlines the design and construction of a continuous mode Class F amplifier using harmonic load pull measurements. To overcome the limits implied by the load pull setup a custom prematch was designed. With this design methodology an amplifier can be build without prior knowledge of the used device's behavior. To design the prematch and the matching networks the Simplified Real Frequency Technique (SRFT) has been applied. By using a commercially available GaN 10W HEMT transistor (Cree CGH40010F), an amplifier was designed and constructed to achieve 12.5% relative bandwidth at a center frequency of 2.5 GHz. Over this band the amplifier achieves an efficiency (PAE) greater than 65% with an average gain of 11.8 dB.
{"title":"Design of a PWM driven continuous mode class F amplifier using harmonic load pull measurements","authors":"B. Pichler, N. Leder, Thomas Faseth, H. Arthaber","doi":"10.1109/MMS.2014.7088942","DOIUrl":"https://doi.org/10.1109/MMS.2014.7088942","url":null,"abstract":"This work outlines the design and construction of a continuous mode Class F amplifier using harmonic load pull measurements. To overcome the limits implied by the load pull setup a custom prematch was designed. With this design methodology an amplifier can be build without prior knowledge of the used device's behavior. To design the prematch and the matching networks the Simplified Real Frequency Technique (SRFT) has been applied. By using a commercially available GaN 10W HEMT transistor (Cree CGH40010F), an amplifier was designed and constructed to achieve 12.5% relative bandwidth at a center frequency of 2.5 GHz. Over this band the amplifier achieves an efficiency (PAE) greater than 65% with an average gain of 11.8 dB.","PeriodicalId":166697,"journal":{"name":"Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)","volume":"156 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":"122765080","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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