Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157297
Messaoud Eljamai, Yacoub Ahmed, M. Ammar, A. Bouallègue
Massive multiple inputs multiple outputs (MIMO) will be the main physical layer technology of 5G systems. Its idea is to use, for each cell, a large number of antennas to increase the network's performances. In order to improve the throughput, 5G system will be aims to use massive MIMO technique in a dense network. In this article, we focus on the study of the uplink massive MIMO system with small cells. The system performances are modeled and optimized. Simulation results show that using massive MIMO with small cells greatly improves the throughput and number of active users in the cellular networks.
{"title":"Performances Evaluation and Optimization of Uplink Massive MIMO System","authors":"Messaoud Eljamai, Yacoub Ahmed, M. Ammar, A. Bouallègue","doi":"10.1109/mms48040.2019.9157297","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157297","url":null,"abstract":"Massive multiple inputs multiple outputs (MIMO) will be the main physical layer technology of 5G systems. Its idea is to use, for each cell, a large number of antennas to increase the network's performances. In order to improve the throughput, 5G system will be aims to use massive MIMO technique in a dense network. In this article, we focus on the study of the uplink massive MIMO system with small cells. The system performances are modeled and optimized. Simulation results show that using massive MIMO with small cells greatly improves the throughput and number of active users in the cellular networks.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132082389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157325
Samir Mendil, T. Aguili
In this article, we present a new hybrid method combining numerical method, Moment Method (MOM) with asymptotic one, Physical optics (PO) method and the geometric theory of Diffraction (GTD), this hybrid method evaluates the surface currents on the patch antenna placed in the rectangular (EMEM) waveguides. The new hybrid current function based on Physical optics (PO) and geometric theory of Diffraction (GTD), which consist in approximating the total current on a homogeneous metallic pattern on two parts; Inside the metal is governed by the PO method, and the edge effects are defined by the GTD method. By subtraction the set of test functions (sinusoidal or triangular) by one and unique test function, we obtain a rapid convergence and less computation time. The new proposed method is used to calculate the scattering on the different geometric shape for validation purposes. The result of this new method: the electromagnetic variables like input impedance, current distribution, and electrical field are in agreement with those given by MoM method.
{"title":"Analysis of Electromagnetic Scattering in Waveguides by Hybrid MOM-PO-GTD Method","authors":"Samir Mendil, T. Aguili","doi":"10.1109/mms48040.2019.9157325","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157325","url":null,"abstract":"In this article, we present a new hybrid method combining numerical method, Moment Method (MOM) with asymptotic one, Physical optics (PO) method and the geometric theory of Diffraction (GTD), this hybrid method evaluates the surface currents on the patch antenna placed in the rectangular (EMEM) waveguides. The new hybrid current function based on Physical optics (PO) and geometric theory of Diffraction (GTD), which consist in approximating the total current on a homogeneous metallic pattern on two parts; Inside the metal is governed by the PO method, and the edge effects are defined by the GTD method. By subtraction the set of test functions (sinusoidal or triangular) by one and unique test function, we obtain a rapid convergence and less computation time. The new proposed method is used to calculate the scattering on the different geometric shape for validation purposes. The result of this new method: the electromagnetic variables like input impedance, current distribution, and electrical field are in agreement with those given by MoM method.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123029902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157256
Nadia Chagtmi, Manel Manai, N. Boulejfen, F. Ghannouchi
In this paper, two concurrent dual band architectures for six-port based receiver (SPR) are compared in terms of complexity, performance and hardware implementations. Experimental set-up of each architecture and the recovering of the two envelop signals using augmented Hammerstein model based calibration approach have been performed to illustrate the difference between the two topologies. In order to evaluate the performance of each architecture a comparative study in term of Error Vector Magnitude (EVM), spectrums and constellations has been performed.
{"title":"Concurrent Dual Band Six-port based Receivers: Topologies and Calibration Technique","authors":"Nadia Chagtmi, Manel Manai, N. Boulejfen, F. Ghannouchi","doi":"10.1109/mms48040.2019.9157256","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157256","url":null,"abstract":"In this paper, two concurrent dual band architectures for six-port based receiver (SPR) are compared in terms of complexity, performance and hardware implementations. Experimental set-up of each architecture and the recovering of the two envelop signals using augmented Hammerstein model based calibration approach have been performed to illustrate the difference between the two topologies. In order to evaluate the performance of each architecture a comparative study in term of Error Vector Magnitude (EVM), spectrums and constellations has been performed.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115700715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/MMS48040.2019.9157312
S. Rafati, Sayyed-Hossein Javid-Hosseini, Vahid Nayyri, M. Soleimani
In this paper, design, fabrication and measurement results of a Doherty power amplifier (DPA) with a fractional bandwidth of wider than 90% is reported. An inverter-less architecture was used to overcome intrinsic bandwidth limitation of conventional DPAs. Instead of using a conventional narrowband quarter wavelength transmission line, by applying a post impedance matching network, the load impedance was converted to a lower impedance and then using a low order matching network, it was matched to the optimum load impedances of the transistor. Output matching networks of both the main and auxiliary amplifiers were designed with maximum efficiency in mind. In a frequency band of 650 MHz to 1750 MHz, measurement results of the fabricated DPA show an average saturated output power of around 100 Watts and a drain efficiency between 56%-78% and 49%-60% at saturation and 6dB back-off, respectively.
{"title":"A Wideband 100W Doherty Power Amplifier","authors":"S. Rafati, Sayyed-Hossein Javid-Hosseini, Vahid Nayyri, M. Soleimani","doi":"10.1109/MMS48040.2019.9157312","DOIUrl":"https://doi.org/10.1109/MMS48040.2019.9157312","url":null,"abstract":"In this paper, design, fabrication and measurement results of a Doherty power amplifier (DPA) with a fractional bandwidth of wider than 90% is reported. An inverter-less architecture was used to overcome intrinsic bandwidth limitation of conventional DPAs. Instead of using a conventional narrowband quarter wavelength transmission line, by applying a post impedance matching network, the load impedance was converted to a lower impedance and then using a low order matching network, it was matched to the optimum load impedances of the transistor. Output matching networks of both the main and auxiliary amplifiers were designed with maximum efficiency in mind. In a frequency band of 650 MHz to 1750 MHz, measurement results of the fabricated DPA show an average saturated output power of around 100 Watts and a drain efficiency between 56%-78% and 49%-60% at saturation and 6dB back-off, respectively.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125722558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157328
S. Chatterjee, T. K. Das
The present paper highlights the design of a third-order double-folded hairpin line Chebyshev bandpass filter centered at 2.5 GHz with improved second harmonic suppression performance applicable for Wireless Local Area Network (WLAN). The conventional hairpin-line filter has been folded twice at the open end arms and accordingly, a size reduction of 19% has been obtained. The skirt characteristics have been improved and the second harmonic has been shifted to higher frequency due to the folding mechanism. However, the harmonic attenuation level remains almost unaffected. Subsequently, square grooves with optimum dimensions and periodicity have been employed at the outer edges of the coupled resonators to achieve phase velocity compensation between even- and odd-modes. As a result, more than 40 dB of harmonic suppression along with size reduction of 25% has been achieved with three periodic square grooves.
{"title":"Compact Hairpin-Line Bandpass Filter with Harmonic Suppression by Periodic Grooves","authors":"S. Chatterjee, T. K. Das","doi":"10.1109/mms48040.2019.9157328","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157328","url":null,"abstract":"The present paper highlights the design of a third-order double-folded hairpin line Chebyshev bandpass filter centered at 2.5 GHz with improved second harmonic suppression performance applicable for Wireless Local Area Network (WLAN). The conventional hairpin-line filter has been folded twice at the open end arms and accordingly, a size reduction of 19% has been obtained. The skirt characteristics have been improved and the second harmonic has been shifted to higher frequency due to the folding mechanism. However, the harmonic attenuation level remains almost unaffected. Subsequently, square grooves with optimum dimensions and periodicity have been employed at the outer edges of the coupled resonators to achieve phase velocity compensation between even- and odd-modes. As a result, more than 40 dB of harmonic suppression along with size reduction of 25% has been achieved with three periodic square grooves.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"49 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132060674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157280
S. Hashemi
Notched band filters are proposed based on multilayer ring resonator (MRR) structures. Three methods are introduced to obtain notch response for both forward-coupling and reverse-coupling configurations. In the first technique, an extra loop is employed on the top or bottom layer of MRR filters and a stop band is generated. This is applied to both forward coupling and reverse coupling. In the second method, a complementary ring resonator which is connected to the ground plane is used to reject undesired frequency and generate bandstop region. The third method, which is used for forward-coupling, the complementary ring is not connected to the ground plane and a dual-notch response is achieved within the passband. Second order and fourth order MRR bandpass filters are used to develop notched band. The simulated scattering parameters are obtained and the results are demonstrated.
{"title":"Notch Filters based on Multilayer Ring Resonators (MRR)","authors":"S. Hashemi","doi":"10.1109/mms48040.2019.9157280","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157280","url":null,"abstract":"Notched band filters are proposed based on multilayer ring resonator (MRR) structures. Three methods are introduced to obtain notch response for both forward-coupling and reverse-coupling configurations. In the first technique, an extra loop is employed on the top or bottom layer of MRR filters and a stop band is generated. This is applied to both forward coupling and reverse coupling. In the second method, a complementary ring resonator which is connected to the ground plane is used to reject undesired frequency and generate bandstop region. The third method, which is used for forward-coupling, the complementary ring is not connected to the ground plane and a dual-notch response is achieved within the passband. Second order and fourth order MRR bandpass filters are used to develop notched band. The simulated scattering parameters are obtained and the results are demonstrated.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129517715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/MMS48040.2019.9157274
Maroua Said, Mohamed Azzouz Ben Taieb, N. Boulejfen
In this paper, we propose a miniaturized six-port junction composed of three hybrid couplers and a Wilkinson power divider based on slow-wave structures. High performances have been achieved in the frequency range from 300 to 500 MHz. The results of both electrical and electromagnetic simulations revealed a very good agreement between the conventional structure and the proposed compacted one that presents a reduction rate up to 66 %.
{"title":"Slow-wave structure for miniaturized six-port junction","authors":"Maroua Said, Mohamed Azzouz Ben Taieb, N. Boulejfen","doi":"10.1109/MMS48040.2019.9157274","DOIUrl":"https://doi.org/10.1109/MMS48040.2019.9157274","url":null,"abstract":"In this paper, we propose a miniaturized six-port junction composed of three hybrid couplers and a Wilkinson power divider based on slow-wave structures. High performances have been achieved in the frequency range from 300 to 500 MHz. The results of both electrical and electromagnetic simulations revealed a very good agreement between the conventional structure and the proposed compacted one that presents a reduction rate up to 66 %.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122345128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157282
M. Labidi, F. Choubani
Résumé-The goal of this work is to present a new structure of metamaterial antenna based on split ring resonator which is optimized to operate at 5G band. The proposed antenna is characterized by a compact size of $0.5lambda_{0}times 0.39lambda_{0}$, with a −10 dB wide bandwidth of 4.36 GHz (15.57%) from 27 GHz to 31.36 GHz. The proposed configuration achieves a gain and a directivity enhancement to be 3.69 dB and 5.7 dB respectively. Moreover, a new technique is detailed to make our antenna reconfigurable and a frequency shift can be controlled by changing the slot position.
{"title":"New Design of Metamaterial Antenna for 5G Applications","authors":"M. Labidi, F. Choubani","doi":"10.1109/mms48040.2019.9157282","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157282","url":null,"abstract":"Résumé-The goal of this work is to present a new structure of metamaterial antenna based on split ring resonator which is optimized to operate at 5G band. The proposed antenna is characterized by a compact size of $0.5lambda_{0}times 0.39lambda_{0}$, with a −10 dB wide bandwidth of 4.36 GHz (15.57%) from 27 GHz to 31.36 GHz. The proposed configuration achieves a gain and a directivity enhancement to be 3.69 dB and 5.7 dB respectively. Moreover, a new technique is detailed to make our antenna reconfigurable and a frequency shift can be controlled by changing the slot position.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"59 34","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120808514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157305
J. Floc'h
This paper describes the antenna design for application in tracking. We propose two structures with simulation, optimization and realization. These antennas are designed at two frequencies GPS (1575 MHz) and IRIDIUM (1616 MHz) with only one feeding. We opt for only one feeding in order to simplify the design of electronic parts and to reduce the cost of the beacon. We compare the design of two technologies in order to optimize the performances and the final cost of the beacon. The first design is a standard technology with printed antenna with soft substrate. The second used the thick film technology. These two technologies permit a local development by local companies.
{"title":"GPS and IRIDIUM Antenna for Tracking","authors":"J. Floc'h","doi":"10.1109/mms48040.2019.9157305","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157305","url":null,"abstract":"This paper describes the antenna design for application in tracking. We propose two structures with simulation, optimization and realization. These antennas are designed at two frequencies GPS (1575 MHz) and IRIDIUM (1616 MHz) with only one feeding. We opt for only one feeding in order to simplify the design of electronic parts and to reduce the cost of the beacon. We compare the design of two technologies in order to optimize the performances and the final cost of the beacon. The first design is a standard technology with printed antenna with soft substrate. The second used the thick film technology. These two technologies permit a local development by local companies.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"438 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122879932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1109/mms48040.2019.9157276
F. Dhaouadi, J. Ribero, S. Beldi, R. Bedira, A. Gharsallah
In this work, we present a textile, flexible and compact antenna intended for body centric wireless communication (BCWC). The design is based on a High Impedance Surface (HIS) as substrates for dipoles operating in the Initial, Scientific and Medical (ISM) 2.5 GHz band. We demonstrate that the HIS can be used without any dipole on top with a single feed point as low-profile antennas. We analyze two possible feeding mechanisms of an HIS of dogbone-shaped conductors. As a result, the proposed antenna does not change significantly when in close proximity of the body: the HIS is utilized to isolate the user's body from undesired electromagnetic radiation. We show that broadside gain and SAR values of the proposed design compared to conventional dipole antenna. Furthermore, it offers a compact and low profile solution which makes it a good candidate for the wearable WBAN application.
{"title":"Synthesis of a Compact High Impedance Surface Antenna Without Dipole on Top for BCWC","authors":"F. Dhaouadi, J. Ribero, S. Beldi, R. Bedira, A. Gharsallah","doi":"10.1109/mms48040.2019.9157276","DOIUrl":"https://doi.org/10.1109/mms48040.2019.9157276","url":null,"abstract":"In this work, we present a textile, flexible and compact antenna intended for body centric wireless communication (BCWC). The design is based on a High Impedance Surface (HIS) as substrates for dipoles operating in the Initial, Scientific and Medical (ISM) 2.5 GHz band. We demonstrate that the HIS can be used without any dipole on top with a single feed point as low-profile antennas. We analyze two possible feeding mechanisms of an HIS of dogbone-shaped conductors. As a result, the proposed antenna does not change significantly when in close proximity of the body: the HIS is utilized to isolate the user's body from undesired electromagnetic radiation. We show that broadside gain and SAR values of the proposed design compared to conventional dipole antenna. Furthermore, it offers a compact and low profile solution which makes it a good candidate for the wearable WBAN application.","PeriodicalId":373813,"journal":{"name":"2019 IEEE 19th Mediterranean Microwave Symposium (MMS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116998624","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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