Pub Date : 2016-09-01DOI: 10.1109/MECAP.2016.7790082
A. Haskou, A. Sharaiha, S. Collardey
In this paper, a new strategy for designing compact Circularly-Polarized (CP) arrays is proposed. This approach consists of using small parasitic superdirective arrays as unit elements. An array is designed for 866MHz RFID band and a parametric analysis on the inter-element distance is performed to highlight the trade-offs between the antenna-dimensions, -directivity and radiation efficiency. For total dimensions of 220 × 220 × 25.8mm3(0.58λ × 0.58λ × 0.075λ), the array has a CP directivity of 10.3dBic and a radiation efficiency of 38.5%.
{"title":"A compact circularly-polarized array based on superdirective elements","authors":"A. Haskou, A. Sharaiha, S. Collardey","doi":"10.1109/MECAP.2016.7790082","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790082","url":null,"abstract":"In this paper, a new strategy for designing compact Circularly-Polarized (CP) arrays is proposed. This approach consists of using small parasitic superdirective arrays as unit elements. An array is designed for 866MHz RFID band and a parametric analysis on the inter-element distance is performed to highlight the trade-offs between the antenna-dimensions, -directivity and radiation efficiency. For total dimensions of 220 × 220 × 25.8mm3(0.58λ × 0.58λ × 0.075λ), the array has a CP directivity of 10.3dBic and a radiation efficiency of 38.5%.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"466 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124606099","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790120
A. Harmouch, H. Haddad, Samara Gharbieh
This research is concerned with controlling the radiation pattern of a sectional cylindrical slotted waveguide antenna (SCSWA) in both horizontal and vertical planes to make the antenna more directive. In order to cover an area several SCSWAs are used, so the beam should be narrow in the horizontal plane to avoid interference. To control the beam in the vertical plane, the number, the width, and the position of slots could be varied. In this research, the focus is on controlling the radiation pattern in the horizontal plane by changing the concavity of the surface where the slots are placed. A series of simulations were performed on the proposed antenna at a desired frequency of 2.4 GHz, the results showed good control over the antenna's performance.
{"title":"Beamwidth control of sectional waveguide antennas using parabolic slotted surfaces","authors":"A. Harmouch, H. Haddad, Samara Gharbieh","doi":"10.1109/MECAP.2016.7790120","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790120","url":null,"abstract":"This research is concerned with controlling the radiation pattern of a sectional cylindrical slotted waveguide antenna (SCSWA) in both horizontal and vertical planes to make the antenna more directive. In order to cover an area several SCSWAs are used, so the beam should be narrow in the horizontal plane to avoid interference. To control the beam in the vertical plane, the number, the width, and the position of slots could be varied. In this research, the focus is on controlling the radiation pattern in the horizontal plane by changing the concavity of the surface where the slots are placed. A series of simulations were performed on the proposed antenna at a desired frequency of 2.4 GHz, the results showed good control over the antenna's performance.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126431285","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790117
H. Omidi, H. Oraizi
This paper introduces a novel dual band shorted square patch, with E-shaped slot and improved radiation properties at GSM and WLAN frequency bands (1.8GHz and 2.4 GHz). The shorted part is designed to operate with a ground plane which is a significant part of the antenna assembly. The proposed antenna has been fabricated on FR4 substrate and has been simulated beside SAM (Specific Anthropomorphic Mannequin) phantom in CST. The optimized SAR (specific absorption rate) for 1.8GHz is 0.425 Kg/W and for 2.4 GHz is 0.3935Kg/W.
{"title":"Enhanced properties of a novel dual band shorted square patch with E-shaped slot for GSM/WLAN bands","authors":"H. Omidi, H. Oraizi","doi":"10.1109/MECAP.2016.7790117","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790117","url":null,"abstract":"This paper introduces a novel dual band shorted square patch, with E-shaped slot and improved radiation properties at GSM and WLAN frequency bands (1.8GHz and 2.4 GHz). The shorted part is designed to operate with a ground plane which is a significant part of the antenna assembly. The proposed antenna has been fabricated on FR4 substrate and has been simulated beside SAM (Specific Anthropomorphic Mannequin) phantom in CST. The optimized SAR (specific absorption rate) for 1.8GHz is 0.425 Kg/W and for 2.4 GHz is 0.3935Kg/W.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"58 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114035964","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790095
A. F. Daw, M. Abdalla, H. Elhennawy
A compact dual ultra-wide band power dividers based on three cells of dual composite right/left handed microstrip structure presented in this article. This introduced topology proposes dual band for multiband orthogonal frequency division multiplexing from 1 GHz-4.8 GHz with insertion loss -5 dB for three way power divider. The second band designed for direct sequence ultra-wideband from 6.2 GHz-9.5 GHz with insertion loss -5.2 dB for the divider. The rejection band extended from 5 to 5.8 GHz is introduces to avoid the interference between WLAN and UWB applications. The article elaborates the equivalent circuit model, analytical study, 3D full wave simulation and fabrication measurement results. Furthermore, the design realizes compactness size 45.37 % over conventional T-junction power divider, and also, realizes compactness size 30.05 % over the most recently compact dividers.
{"title":"Compact dual wide band D-CRLH three way power divider","authors":"A. F. Daw, M. Abdalla, H. Elhennawy","doi":"10.1109/MECAP.2016.7790095","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790095","url":null,"abstract":"A compact dual ultra-wide band power dividers based on three cells of dual composite right/left handed microstrip structure presented in this article. This introduced topology proposes dual band for multiband orthogonal frequency division multiplexing from 1 GHz-4.8 GHz with insertion loss -5 dB for three way power divider. The second band designed for direct sequence ultra-wideband from 6.2 GHz-9.5 GHz with insertion loss -5.2 dB for the divider. The rejection band extended from 5 to 5.8 GHz is introduces to avoid the interference between WLAN and UWB applications. The article elaborates the equivalent circuit model, analytical study, 3D full wave simulation and fabrication measurement results. Furthermore, the design realizes compactness size 45.37 % over conventional T-junction power divider, and also, realizes compactness size 30.05 % over the most recently compact dividers.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125915374","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790103
K. Jomaa, F. Ndagijimana, J. Jomaah, H. Ayad
In this paper the design of a new 3D magnetic field (H-field) probe with a near-field scanning system is presented. The proposed system was developed in order to determine the magnetic near-field emitted by electronic devices. The designed isotropic H-field probe consists of three orthogonal and identical loops each of diameter of 6 mm having 3 turns. The antenna factor of the designed probe is presented for a frequency range from 1 MHz to 1 GHz. In order to verify the performance of the designed probe, magnetic near-field measurements were done for a standard circuit. The comparison between the measured results and the theoretical calculations was performed for validation.
{"title":"Near-field measurement system with 3D magnetic-field probe design for dosimetric applications","authors":"K. Jomaa, F. Ndagijimana, J. Jomaah, H. Ayad","doi":"10.1109/MECAP.2016.7790103","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790103","url":null,"abstract":"In this paper the design of a new 3D magnetic field (H-field) probe with a near-field scanning system is presented. The proposed system was developed in order to determine the magnetic near-field emitted by electronic devices. The designed isotropic H-field probe consists of three orthogonal and identical loops each of diameter of 6 mm having 3 turns. The antenna factor of the designed probe is presented for a frequency range from 1 MHz to 1 GHz. In order to verify the performance of the designed probe, magnetic near-field measurements were done for a standard circuit. The comparison between the measured results and the theoretical calculations was performed for validation.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131281935","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790094
M. Abdalla, Zhirun Hu
This paper is composed of two parts. First, we explain the basic concepts of general composite right / left handed transmission line designs using ferrite medium. We explain its different analysis unlike conventional dielectric case. Hence, the ferrite left handed transmission line properties are emphasized compared to dielectric one. Second, we present some novel microwave device applications based on ferrite left handed transmission lines. The theories of these devices are based on the concepts introduced in the first part. These applications comprise quarter wavelength transformers and zeroth order resonator. Such applications have the advantages of compact size in addition to the tunability properties. Moreover, the proposed devices require small DC magnetic bias.
{"title":"Novel composite right/left handed ferrite metamaterials components","authors":"M. Abdalla, Zhirun Hu","doi":"10.1109/MECAP.2016.7790094","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790094","url":null,"abstract":"This paper is composed of two parts. First, we explain the basic concepts of general composite right / left handed transmission line designs using ferrite medium. We explain its different analysis unlike conventional dielectric case. Hence, the ferrite left handed transmission line properties are emphasized compared to dielectric one. Second, we present some novel microwave device applications based on ferrite left handed transmission lines. The theories of these devices are based on the concepts introduced in the first part. These applications comprise quarter wavelength transformers and zeroth order resonator. Such applications have the advantages of compact size in addition to the tunability properties. Moreover, the proposed devices require small DC magnetic bias.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129521282","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790122
Nidal Zarifeh, A. Kabbani, M. El-Absi, T. Kreul, T. Kaiser
As recommended by 5th generation Public-Private Partnership (5G-PPP) and Next Generation Mobile Networks (NGMN), one of the most important 5G requirements is to minimize the delay within the network for delay-sensitive services. Main objective of this work is to exploit massive MIMO technology to reduce Hybrid Automatic Repeat Query (HARQ) retransmission delay. Massive MIMO indoor environment is created by a 3D ray-tracing tool to simulate the received power, phase, delay, and angle of arrival of each ray in the channel. Two sizes of rectangular antenna array are used to evaluate the performance of beamforming in enhancing the bit error rate. This reflects directly on the mean and maximum numbers of packet retransmission. The angle between user-equipments is considered to evaluate the effect of inter-user interference on HARQ. This work opens the door to develop smarter resource allocation algorithms in 5G for delay-sensitive services based on the location and the angle of arrival of the users.
{"title":"Massive MIMO exploitation to reduce HARQ delay in wireless communication system","authors":"Nidal Zarifeh, A. Kabbani, M. El-Absi, T. Kreul, T. Kaiser","doi":"10.1109/MECAP.2016.7790122","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790122","url":null,"abstract":"As recommended by 5th generation Public-Private Partnership (5G-PPP) and Next Generation Mobile Networks (NGMN), one of the most important 5G requirements is to minimize the delay within the network for delay-sensitive services. Main objective of this work is to exploit massive MIMO technology to reduce Hybrid Automatic Repeat Query (HARQ) retransmission delay. Massive MIMO indoor environment is created by a 3D ray-tracing tool to simulate the received power, phase, delay, and angle of arrival of each ray in the channel. Two sizes of rectangular antenna array are used to evaluate the performance of beamforming in enhancing the bit error rate. This reflects directly on the mean and maximum numbers of packet retransmission. The angle between user-equipments is considered to evaluate the effect of inter-user interference on HARQ. This work opens the door to develop smarter resource allocation algorithms in 5G for delay-sensitive services based on the location and the angle of arrival of the users.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133405682","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790093
H. Al-Lawati, S. Khamas
Two circularly polarized open loop antennas, backed by square patch AMC ground planes and operating at the GPS Li band are presented. The first one is fed by a co-planar waveguide (CPW) and the second one is fed by a vertical probe. The CPW antenna has provided measured S11 and AR bandwidths of ~11% and 6% respectively compared to ~21% and 5% for the vertical probe fed antenna. Both antennas have provided useful bore-sight gain at the desired frequency.
{"title":"Circularly polarized open loop antenna backed by square AMC with different feeding mechanisms","authors":"H. Al-Lawati, S. Khamas","doi":"10.1109/MECAP.2016.7790093","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790093","url":null,"abstract":"Two circularly polarized open loop antennas, backed by square patch AMC ground planes and operating at the GPS Li band are presented. The first one is fed by a co-planar waveguide (CPW) and the second one is fed by a vertical probe. The CPW antenna has provided measured S11 and AR bandwidths of ~11% and 6% respectively compared to ~21% and 5% for the vertical probe fed antenna. Both antennas have provided useful bore-sight gain at the desired frequency.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130197267","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790104
Ayman El-Bacha, R. Sarkis
This communication presents the design of down tilted 3D Taper Slot Antennas suitable for base stations of future generation mobile communication. We designed a novel Vivaldi antenna with wide frequency band performance covering a larger band than the 4th Generation with a vertical tilting to suit the bases station coverage requirements. A downscaled version of this metal only antenna is advantageous for higher frequency bands of the 5th Generation. The available space inside of the 3D structure is suitable to integrate low noise amplifier as near as possible to the feeding point minimizing the losses in the cable while maintaining good performance in terms of gain and efficiency. Circular antenna array of (4G) and (5G) antenna elements are simulated in terms of reflection coefficient and inter-element coupling. We developed and measured a prototype of a single (4G) antenna. Good agreement is obtained between simulation and measurements.
{"title":"Design of tilted taper slot antenna for 5G base station antenna circular array","authors":"Ayman El-Bacha, R. Sarkis","doi":"10.1109/MECAP.2016.7790104","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790104","url":null,"abstract":"This communication presents the design of down tilted 3D Taper Slot Antennas suitable for base stations of future generation mobile communication. We designed a novel Vivaldi antenna with wide frequency band performance covering a larger band than the 4th Generation with a vertical tilting to suit the bases station coverage requirements. A downscaled version of this metal only antenna is advantageous for higher frequency bands of the 5th Generation. The available space inside of the 3D structure is suitable to integrate low noise amplifier as near as possible to the feeding point minimizing the losses in the cable while maintaining good performance in terms of gain and efficiency. Circular antenna array of (4G) and (5G) antenna elements are simulated in terms of reflection coefficient and inter-element coupling. We developed and measured a prototype of a single (4G) antenna. Good agreement is obtained between simulation and measurements.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129771271","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790085
H. Oraizi, B. Bahreini
In this paper, an optimum design of a novel non-uniformly excited planar array is presented by the use of Invasive Weed Optimization algorithm. In the proposed planar array, elements are arranged in a bee-hived configuration and positioned in XY plane producing a symmetrical pattern in every φ cut. The optimization algorithm is utilized for determining the amplitudes and phases of array elements to cut down the side-lobe levels. The results show that the array with bee-hived configuration provides an almost omnidirectional pattern and also the peak side lobe level of the synthesized radiation pattern could be made quite low in comparison with circular and rectangular configurations.
{"title":"Design of concentric bee-hived antenna array using the Invasive Weed Optimization","authors":"H. Oraizi, B. Bahreini","doi":"10.1109/MECAP.2016.7790085","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790085","url":null,"abstract":"In this paper, an optimum design of a novel non-uniformly excited planar array is presented by the use of Invasive Weed Optimization algorithm. In the proposed planar array, elements are arranged in a bee-hived configuration and positioned in XY plane producing a symmetrical pattern in every φ cut. The optimization algorithm is utilized for determining the amplitudes and phases of array elements to cut down the side-lobe levels. The results show that the array with bee-hived configuration provides an almost omnidirectional pattern and also the peak side lobe level of the synthesized radiation pattern could be made quite low in comparison with circular and rectangular configurations.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127557319","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}