Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550166
J. Hautcoeur, G. Panther, R. Johnston
This paper presents two solutions to improve the front to back ratio (FBR) of the VeraPhase® (VP6000) antenna. A compact and light disk structure and a ground plane with absorber layer located under the antenna were designed and optimized in the 3D RF simulator WIPL-D in order to reduce the FBR without impacting the other performances of the antenna. The optimized results show great improvement of the FBR at all frequencies from 2.5 dB up to 7.3 dB without reducing the gain in the upper hemisphere of the antenna. The proposed solution are both efficient and low cost solutions to optimize the FBR of the VP6000.
本文提出了提高VeraPhase®(VP6000)天线前后比(FBR)的两种方案。为了在不影响天线其他性能的前提下降低频响比，在三维射频模拟器WIPL-D中设计并优化了紧凑轻便的圆盘结构和天线下方带吸收层的地平面。优化结果表明，在不降低天线上半球增益的情况下，天线在2.5 dB ~ 7.3 dB范围内的频宽有了很大的提高。所提出的方案是优化VP6000快流比的高效低成本方案。
{"title":"Front to back ratio improvement of the Veraphase® GNSS antenna","authors":"J. Hautcoeur, G. Panther, R. Johnston","doi":"10.1109/ANTEM.2016.7550166","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550166","url":null,"abstract":"This paper presents two solutions to improve the front to back ratio (FBR) of the VeraPhase® (VP6000) antenna. A compact and light disk structure and a ground plane with absorber layer located under the antenna were designed and optimized in the 3D RF simulator WIPL-D in order to reduce the FBR without impacting the other performances of the antenna. The optimized results show great improvement of the FBR at all frequencies from 2.5 dB up to 7.3 dB without reducing the gain in the upper hemisphere of the antenna. The proposed solution are both efficient and low cost solutions to optimize the FBR of the VP6000.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121189243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550154
J. Pourahmadazar, R. Karimian, M. Farahani, T. Denidni
A novel beam-forming phased array system using a substrate integrated waveguide (SIW) fed Yagi-Uda array antenna is presented. This phase array antenna employs an integrated waveguide structure lens as a beam forming network (BFN). A prototype phased array system is designed with 7 beam ports, 9 array ports, and 8 dummy ports. A 10 GHz SIW-fed Bow-tie linear array antenna is proposed with a nonplanar structure to scan over (-24°, +24°) with SIW lens.
{"title":"Planar microwave lens based beam-forming phased antenna array system using non-coplanar SIW fed bowtie antenna","authors":"J. Pourahmadazar, R. Karimian, M. Farahani, T. Denidni","doi":"10.1109/ANTEM.2016.7550154","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550154","url":null,"abstract":"A novel beam-forming phased array system using a substrate integrated waveguide (SIW) fed Yagi-Uda array antenna is presented. This phase array antenna employs an integrated waveguide structure lens as a beam forming network (BFN). A prototype phased array system is designed with 7 beam ports, 9 array ports, and 8 dummy ports. A 10 GHz SIW-fed Bow-tie linear array antenna is proposed with a nonplanar structure to scan over (-24°, +24°) with SIW lens.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121350167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550131
Guibai Xie, W. Cui, Jing Yang
Secondary electron yield suppression is of great importance for high power microwave components in satellite. Great efforts have been made to find an easy and effective way to suppress the secondary electron emission process. However, it's still a challenge. In this paper we report a new approach for secondary electron emission suppression which can realize reducing the secondary electron yield from 2.12 to 1.09. Compared with the traditional techniques, this approach makes use of graphene which is deposited by remote plasma enhanced chemical vapor deposition on the surface of the components to realize the suppression of the secondary emission. Raman spectroscopy was used to character the quality of graphene. The nano-membrane of grapheme further enhances the suppression effect and contributes little to the insertion loss of the surface. Our technique shows great potential in space applications.
{"title":"A general route towards secondary electron yield suppression based on graphene","authors":"Guibai Xie, W. Cui, Jing Yang","doi":"10.1109/ANTEM.2016.7550131","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550131","url":null,"abstract":"Secondary electron yield suppression is of great importance for high power microwave components in satellite. Great efforts have been made to find an easy and effective way to suppress the secondary electron emission process. However, it's still a challenge. In this paper we report a new approach for secondary electron emission suppression which can realize reducing the secondary electron yield from 2.12 to 1.09. Compared with the traditional techniques, this approach makes use of graphene which is deposited by remote plasma enhanced chemical vapor deposition on the surface of the components to realize the suppression of the secondary emission. Raman spectroscopy was used to character the quality of graphene. The nano-membrane of grapheme further enhances the suppression effect and contributes little to the insertion loss of the surface. Our technique shows great potential in space applications.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121649078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550115
Shraman Gupta, M. Akbari, A. Sebak
A 32.5 GHz antipodal fermi-linear tapered slot antenna (AFLTSA) 1×8 array for millimeter wave applications is presented in this paper. The substrate integrated waveguide (SIW) feeding structure is used to excite this proposed antenna. The proposed antenna has a sine corrugation to improve the radiation characteristics of the antenna. The simulated results of the single element yields a wide bandwidth between 30-40 GHz with a high gain of 12.15 dB and a side lobe level better than 17.85 dB in E-plane. This antenna is further simulated for 1×8 antenna array which yields a high gain of 20.1 dB with a side lobe level better than 22.5 dB in E-plane. The objective of this work is to have a high gain and lowside lobe level for this proposed array structure. The work is simulated using AnsoftHFSS and CST Microwave Studio software.
{"title":"High gain antipodal fermi-linear tapered slot antenna (AFLTSA) array fed by SIW for MMW applications","authors":"Shraman Gupta, M. Akbari, A. Sebak","doi":"10.1109/ANTEM.2016.7550115","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550115","url":null,"abstract":"A 32.5 GHz antipodal fermi-linear tapered slot antenna (AFLTSA) 1×8 array for millimeter wave applications is presented in this paper. The substrate integrated waveguide (SIW) feeding structure is used to excite this proposed antenna. The proposed antenna has a sine corrugation to improve the radiation characteristics of the antenna. The simulated results of the single element yields a wide bandwidth between 30-40 GHz with a high gain of 12.15 dB and a side lobe level better than 17.85 dB in E-plane. This antenna is further simulated for 1×8 antenna array which yields a high gain of 20.1 dB with a side lobe level better than 22.5 dB in E-plane. The objective of this work is to have a high gain and lowside lobe level for this proposed array structure. The work is simulated using AnsoftHFSS and CST Microwave Studio software.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122995726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550178
Djelloul Aissaoui, L. Abdelghani, Noureddine Boukli-Hacen, T. Denidni
In the present paper, a novel coplanar wiveguide (CPW)-fed printed fractal-shaped slot antenna for bandwidth enhancement is presented. The proposed antenna is composed of a wide fractal-shaped slot and an hexagonal parasitic patch fed by a CPW Feed. The combination of the fractal concept and CPW-fed technique allows to improve the characteristics of the proposed antenna significantly. The simulation results show that the impedance bandwidth, defined by -10 dB reflection coefficient, of the proposed antenna can reach a value of 138.35% from 2.27 GHz to 12.46 GHz with simulated peak gain variation form 2.1 to 7.3 dBi and a good radiation pattern. Compactness and stable radiation pattern make the antenna suitable for UWB applications.
{"title":"CPW-fed printed fractal slot antenna for UWB applications","authors":"Djelloul Aissaoui, L. Abdelghani, Noureddine Boukli-Hacen, T. Denidni","doi":"10.1109/ANTEM.2016.7550178","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550178","url":null,"abstract":"In the present paper, a novel coplanar wiveguide (CPW)-fed printed fractal-shaped slot antenna for bandwidth enhancement is presented. The proposed antenna is composed of a wide fractal-shaped slot and an hexagonal parasitic patch fed by a CPW Feed. The combination of the fractal concept and CPW-fed technique allows to improve the characteristics of the proposed antenna significantly. The simulation results show that the impedance bandwidth, defined by -10 dB reflection coefficient, of the proposed antenna can reach a value of 138.35% from 2.27 GHz to 12.46 GHz with simulated peak gain variation form 2.1 to 7.3 dBi and a good radiation pattern. Compactness and stable radiation pattern make the antenna suitable for UWB applications.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128419845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550190
S. Latif, D. Nelson, Vinhson La
On-body printed antenna is a rapidly growing research area targeted for healthcare, biomedical, public safety and military applications. Printed antennas in both microwave (MW) and millimeter wave (mmWave) frequency bands have been found useful for Wireless Body Area Networks (WBAN) and medical devices. While miniaturization, conformability and good near-field patterns have prime importance in the antenna design, the interaction of RF signals with human body and the effective signal penetration need to be assessed carefully during the design phase. An on-body 2×2 printed antenna array is under development at mmWave frequencies on a flexible material. The single patch antenna design and results are presented in this paper. The return loss data due to the close proximity of skin is also discussed. The results from the array showing specific absorption rate (SAR) and power density (PD) profile on an experimental phantom using a high-resolution infrared camera will be presented at the symposium.
{"title":"An on-body conformai printed array antenna at mmWave frequencies for healthcare applications","authors":"S. Latif, D. Nelson, Vinhson La","doi":"10.1109/ANTEM.2016.7550190","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550190","url":null,"abstract":"On-body printed antenna is a rapidly growing research area targeted for healthcare, biomedical, public safety and military applications. Printed antennas in both microwave (MW) and millimeter wave (mmWave) frequency bands have been found useful for Wireless Body Area Networks (WBAN) and medical devices. While miniaturization, conformability and good near-field patterns have prime importance in the antenna design, the interaction of RF signals with human body and the effective signal penetration need to be assessed carefully during the design phase. An on-body 2×2 printed antenna array is under development at mmWave frequencies on a flexible material. The single patch antenna design and results are presented in this paper. The return loss data due to the close proximity of skin is also discussed. The results from the array showing specific absorption rate (SAR) and power density (PD) profile on an experimental phantom using a high-resolution infrared camera will be presented at the symposium.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114634466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550189
K. Brown, Nicholas Geddert, I. Jeffrey
The time-harmonic Discontinuous Galerkin Method (DGM) is a flexible forward solver for inverse scattering problems in electromagnetics. Standard DGM discretizations of Maxwell's curl equations, simultaneously solving for both electric and magnetic fields, are generally more accurate but less efficient than the DGM applied to the electric vector wave equation. A natural extension is to mix DGM formulations such that either the curl equation formulation or the wave equation formulation is locally adopted to preserve accuracy. Herein we present such a mixed DGM formulation for time-harmonic scattering problems, where the formulation choice is locally based on the presence of electric or magnetic constitutive parameters that differ from the background medium.
{"title":"A mixed Discontinuous Galerkin formulation for time-harmonic scattering problems","authors":"K. Brown, Nicholas Geddert, I. Jeffrey","doi":"10.1109/ANTEM.2016.7550189","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550189","url":null,"abstract":"The time-harmonic Discontinuous Galerkin Method (DGM) is a flexible forward solver for inverse scattering problems in electromagnetics. Standard DGM discretizations of Maxwell's curl equations, simultaneously solving for both electric and magnetic fields, are generally more accurate but less efficient than the DGM applied to the electric vector wave equation. A natural extension is to mix DGM formulations such that either the curl equation formulation or the wave equation formulation is locally adopted to preserve accuracy. Herein we present such a mixed DGM formulation for time-harmonic scattering problems, where the formulation choice is locally based on the presence of electric or magnetic constitutive parameters that differ from the background medium.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123065071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550120
M. R. Chaharmir, J. Ethier
A novel dual-band Frequency Selective Surface (FSS) using double meandered loops is designed to block the transmission of signals at 13 and 24 GHz, while allowing other portions of the RF spectrum to pass. The structure was fabricated using Printed Electronics (PE) technology and both simulated and measured results are reported.
{"title":"Design of a dual-band 13/24 GHz frequency selective surface using meandered loop elements","authors":"M. R. Chaharmir, J. Ethier","doi":"10.1109/ANTEM.2016.7550120","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550120","url":null,"abstract":"A novel dual-band Frequency Selective Surface (FSS) using double meandered loops is designed to block the transmission of signals at 13 and 24 GHz, while allowing other portions of the RF spectrum to pass. The structure was fabricated using Printed Electronics (PE) technology and both simulated and measured results are reported.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123299321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550112
H. Arab, S. Tatu, C. Akyel
In this paper, two different six-port correlators by using 90° hybrid couplers, with or without a Wilkinson power divider, were designed and simulated at the center frequency of 77 GHz. The performance of the designed correlators are assessed via full-wave commercial electromagnetic package, Advanced Design System (ADS) of Keysight Technologies. The simulation results show that the six-port correlator structure with four 90° hybrid couplers and without Wilkinson power divider gets wider bandwidth and smaller phase error in comparison to the another six-port correlator. Besides the structure with Wilkinson has low error at the output voltage signals with phase difference of 0°, 180°, 90° and 270°. Both structure individually have relative importance in the design of the wireless terminals as a modulator and demodulator in receiver and transmitter instead of using mixer.
{"title":"Performance analysis for two different structures of 77 GHz six-port correlator","authors":"H. Arab, S. Tatu, C. Akyel","doi":"10.1109/ANTEM.2016.7550112","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550112","url":null,"abstract":"In this paper, two different six-port correlators by using 90° hybrid couplers, with or without a Wilkinson power divider, were designed and simulated at the center frequency of 77 GHz. The performance of the designed correlators are assessed via full-wave commercial electromagnetic package, Advanced Design System (ADS) of Keysight Technologies. The simulation results show that the six-port correlator structure with four 90° hybrid couplers and without Wilkinson power divider gets wider bandwidth and smaller phase error in comparison to the another six-port correlator. Besides the structure with Wilkinson has low error at the output voltage signals with phase difference of 0°, 180°, 90° and 270°. Both structure individually have relative importance in the design of the wireless terminals as a modulator and demodulator in receiver and transmitter instead of using mixer.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"25 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123732717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550195
Slobodan Jović, M. Clénet, Y. Antar
A concept for further size reduction of a previously reported compact aperture coupled and cavity-backed hybrid Dielectric Resonator Antenna (hDRA) is presented. The concept proposes use of a back plane made of a high impedance artificial surface to replace the antenna back cavity, which adds about 24 mm to the antenna height. The artificial surface back plane is made of entwining planar quadrifilar spirals that form a compact electromagnetic bandgap structure (EBG) providing a bandgap of about 35%. The back plane is formed of two single sided printed circuit board (PCB) layers. Such back plane reduces the overall antenna height by approximately 21 mm.
{"title":"Aperture coupled hybrid dielectric resonator antenna with an EBG back plane","authors":"Slobodan Jović, M. Clénet, Y. Antar","doi":"10.1109/ANTEM.2016.7550195","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550195","url":null,"abstract":"A concept for further size reduction of a previously reported compact aperture coupled and cavity-backed hybrid Dielectric Resonator Antenna (hDRA) is presented. The concept proposes use of a back plane made of a high impedance artificial surface to replace the antenna back cavity, which adds about 24 mm to the antenna height. The artificial surface back plane is made of entwining planar quadrifilar spirals that form a compact electromagnetic bandgap structure (EBG) providing a bandgap of about 35%. The back plane is formed of two single sided printed circuit board (PCB) layers. Such back plane reduces the overall antenna height by approximately 21 mm.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122929343","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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