Pub Date : 2018-10-01DOI: 10.23919/RADIO.2018.8572452
P. Paul, K. Kandasamy, M. Sharawi
In this paper, a compact tri-band split ring resonator (SRR) loaded slot antenna is proposed which offers independent frequency tunability for operation at WLAN and WiMAX bands. The microstrip fed slot antenna is loaded with a modified SRR to obtain the triband resonance. The compactness is achieved by using an open slot antenna. The slot is designed to resonate at 2.4 GHz, which combines with the resonance obtained due to a fictitious short circuit produced at a certain point along the slot. This leads to the wideband property at the first band. The second and third resonances are obtained at 7.5 GHz and 9.3 GHz. The resonances can be independently controlled by changing the slot and SRR dimensions.
{"title":"A Tri-Band SRR Loaded Half Slot Antenna with Wideband Properties","authors":"P. Paul, K. Kandasamy, M. Sharawi","doi":"10.23919/RADIO.2018.8572452","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572452","url":null,"abstract":"In this paper, a compact tri-band split ring resonator (SRR) loaded slot antenna is proposed which offers independent frequency tunability for operation at WLAN and WiMAX bands. The microstrip fed slot antenna is loaded with a modified SRR to obtain the triband resonance. The compactness is achieved by using an open slot antenna. The slot is designed to resonate at 2.4 GHz, which combines with the resonance obtained due to a fictitious short circuit produced at a certain point along the slot. This leads to the wideband property at the first band. The second and third resonances are obtained at 7.5 GHz and 9.3 GHz. The resonances can be independently controlled by changing the slot and SRR dimensions.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121188236","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572447
Mohammed Kalaagi, D. Seetharamdoo
In this paper, we introduce a reciprocal multiple angle retro-reflective metasurface following the general principles of the surface impedance concept and numerical optimization of the super-cell design. The aim is to obtain retroreflection simultaneously at the desired direction and open channels of the designed metasurface. With an increase of periodicity of the super-cell design, the number of open channels increases according to Floquet-BLoch analysis. With an increase up to $mathbf{2}lambda$ and higher the system is said to become very lossy and loses its reciprocity in the symmetrical directions. In this particular case, a new design super-cell approach for a reciprocal retrodirective metasurface is studied for a periodicity of $mathbf{2.9}lambda$ at a 10° incident angle. For the validation of the analysis and performance of the designed metasurface, the monostatic RCS is given to determine the performance of the metasurface for retro-reflection. The results show significant levels at the desired angle (10°) and open channels (−32° and −44°), as well as a recovery of the loss in the symmetrical directions (−10°, 32° and 44°) using the reciprocal metasurface design approach.
{"title":"Reciprocal Optimized Surface Impedance Multiple Angle Retro-Reflective Metasurfaces","authors":"Mohammed Kalaagi, D. Seetharamdoo","doi":"10.23919/RADIO.2018.8572447","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572447","url":null,"abstract":"In this paper, we introduce a reciprocal multiple angle retro-reflective metasurface following the general principles of the surface impedance concept and numerical optimization of the super-cell design. The aim is to obtain retroreflection simultaneously at the desired direction and open channels of the designed metasurface. With an increase of periodicity of the super-cell design, the number of open channels increases according to Floquet-BLoch analysis. With an increase up to $mathbf{2}lambda$ and higher the system is said to become very lossy and loses its reciprocity in the symmetrical directions. In this particular case, a new design super-cell approach for a reciprocal retrodirective metasurface is studied for a periodicity of $mathbf{2.9}lambda$ at a 10° incident angle. For the validation of the analysis and performance of the designed metasurface, the monostatic RCS is given to determine the performance of the metasurface for retro-reflection. The results show significant levels at the desired angle (10°) and open channels (−32° and −44°), as well as a recovery of the loss in the symmetrical directions (−10°, 32° and 44°) using the reciprocal metasurface design approach.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116424681","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572338
E. Novakov
This paper presents the architecture, the realization and the measurement results of a high sensitivity, long range and low data rates radio frequency (RF) transceiver. The transceiver can be used for Wireless Sensor Networks or Internet of Things (IoT) applications as well as for any long range digital point to point RF links. The system is designed for the 869 MHz Industrial, Scientific and Medical (ISM) frequency band. For Minimum Shift Key (MSK) modulation and data rate of 500 bit/s the measured receiver sensitivity is −134 dBm. A sensitivity improvement can be achieved by using the Time Synchronous Averaging (TSA) method. In this approach the block to be sent is retransmitted multiple times. Received blocks are synchronously averaged thus increasing the signal-to-noise ratio. By retransmitting the data block 3 times the sensitivity is increased by 3 dB. For a transmitted power of 19 dBm a radio link can be achieved over a distance of more than 11 km with a standard whip antenna.
{"title":"High Sensitivity RF Transceiver for Long Range IoT Communications","authors":"E. Novakov","doi":"10.23919/RADIO.2018.8572338","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572338","url":null,"abstract":"This paper presents the architecture, the realization and the measurement results of a high sensitivity, long range and low data rates radio frequency (RF) transceiver. The transceiver can be used for Wireless Sensor Networks or Internet of Things (IoT) applications as well as for any long range digital point to point RF links. The system is designed for the 869 MHz Industrial, Scientific and Medical (ISM) frequency band. For Minimum Shift Key (MSK) modulation and data rate of 500 bit/s the measured receiver sensitivity is −134 dBm. A sensitivity improvement can be achieved by using the Time Synchronous Averaging (TSA) method. In this approach the block to be sent is retransmitted multiple times. Received blocks are synchronously averaged thus increasing the signal-to-noise ratio. By retransmitting the data block 3 times the sensitivity is increased by 3 dB. For a transmitted power of 19 dBm a radio link can be achieved over a distance of more than 11 km with a standard whip antenna.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126633820","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572400
J. Vavra, J. Bajer, D. Biolek
In this paper, the RF single-pole double-throw switch based on memistor is presented. This idea combines features of FET-based RF switches and already published memristor-based switches. The circuit function does not require the continuous DC bias signal and therefore either auxiliary capacitors or inductors. The SPICE simulations are based on the model obtained from physical measurements reported in the literature.
{"title":"RF Single-Pole Double-Throw Switch Based on Memistor","authors":"J. Vavra, J. Bajer, D. Biolek","doi":"10.23919/RADIO.2018.8572400","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572400","url":null,"abstract":"In this paper, the RF single-pole double-throw switch based on memistor is presented. This idea combines features of FET-based RF switches and already published memristor-based switches. The circuit function does not require the continuous DC bias signal and therefore either auxiliary capacitors or inductors. The SPICE simulations are based on the model obtained from physical measurements reported in the literature.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117311985","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572471
C. Fumeaux, N. Nguyen-Trong
Low-profile monopoles operating over a wide bandwidth are highly desirable for integration into various metallic/conductive platforms, e.g. on vehicle roofs. A simple realization of omnidirectional radiation patterns is offered by center-fed shorted patch antennas, which have been first proposed in the 1950's [1]. This type of antenna has been revisited many times since then and recent designs achieve high performance combining wide bandwidth of operation and ultra-low profile. The general principle of operation of low-profile monopoles can be generally interpreted as physical realization of a magnetic current loop [2].
{"title":"Low-Profile Substrate-Integrated Wideband Monopole Antennas","authors":"C. Fumeaux, N. Nguyen-Trong","doi":"10.23919/RADIO.2018.8572471","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572471","url":null,"abstract":"Low-profile monopoles operating over a wide bandwidth are highly desirable for integration into various metallic/conductive platforms, e.g. on vehicle roofs. A simple realization of omnidirectional radiation patterns is offered by center-fed shorted patch antennas, which have been first proposed in the 1950's [1]. This type of antenna has been revisited many times since then and recent designs achieve high performance combining wide bandwidth of operation and ultra-low profile. The general principle of operation of low-profile monopoles can be generally interpreted as physical realization of a magnetic current loop [2].","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125507926","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572313
C. Stevens, A. Vallecchi, S. Chu, Jiaruo Yan, E. Shamonina
We report the development of a new method to both describe and design metamaterials, meta-surfaces and meta-structures in which discrete passive structures are combined into ensembles. We call these structures, meta-atoms and the structures that result are meta-molecules. By using this concept new structures can be designed with a wide range of desirable properties.
{"title":"Meta-Molecular Devices","authors":"C. Stevens, A. Vallecchi, S. Chu, Jiaruo Yan, E. Shamonina","doi":"10.23919/RADIO.2018.8572313","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572313","url":null,"abstract":"We report the development of a new method to both describe and design metamaterials, meta-surfaces and meta-structures in which discrete passive structures are combined into ensembles. We call these structures, meta-atoms and the structures that result are meta-molecules. By using this concept new structures can be designed with a wide range of desirable properties.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132912657","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572341
Z. Hamzavi-Zarghani, A. Yahaghi, L. Matekovits, I. Peter
In this paper, a tunable polarization converter, in the THz band, based on graphene metasurface is presented. The unit cell of the proposed metasurfac consists of a dielectric substrate and a graphene cut wire backed on a metal ground. The designed metasurface has been optimized to operate as a polarization converter in reflection mode. Moreover, by changing the chemical potential of graphene, the operation frequency can be tuned.
{"title":"Tunable Polarization Converter Based on Graphene Metasurfaces","authors":"Z. Hamzavi-Zarghani, A. Yahaghi, L. Matekovits, I. Peter","doi":"10.23919/RADIO.2018.8572341","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572341","url":null,"abstract":"In this paper, a tunable polarization converter, in the THz band, based on graphene metasurface is presented. The unit cell of the proposed metasurfac consists of a dielectric substrate and a graphene cut wire backed on a metal ground. The designed metasurface has been optimized to operate as a polarization converter in reflection mode. Moreover, by changing the chemical potential of graphene, the operation frequency can be tuned.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125845219","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572320
M. V. Thayyil, P. V. Testa, C. Carta, F. Ellinger
This paper presents the design and characterization of an integrated rectangular patch antenna implemented in the back end of line (BEOL) of a 130 nm silicon germanium (SiGe) technology. The inset-fed antenna has a patch area of 0.19 mm2. To the knowledge of the authors, this is one of the smallest radiating element areas reported in literature for on-chip antennas at comparable frequencies. Electromagnetic simulations show a maximum antenna gain of 2.6 dBi and a directivity of 9.3 dBi. The measured resonance frequency of 192.3 GHz is in agreement with post-layout simulation results. Design challenges including impact of density fillers in integrated technologies are also discussed.
{"title":"A 190 GHz Inset-Fed Patch Antenna in SiGe BEOL for On-Chip Integration","authors":"M. V. Thayyil, P. V. Testa, C. Carta, F. Ellinger","doi":"10.23919/RADIO.2018.8572320","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572320","url":null,"abstract":"This paper presents the design and characterization of an integrated rectangular patch antenna implemented in the back end of line (BEOL) of a 130 nm silicon germanium (SiGe) technology. The inset-fed antenna has a patch area of 0.19 mm2. To the knowledge of the authors, this is one of the smallest radiating element areas reported in literature for on-chip antennas at comparable frequencies. Electromagnetic simulations show a maximum antenna gain of 2.6 dBi and a directivity of 9.3 dBi. The measured resonance frequency of 192.3 GHz is in agreement with post-layout simulation results. Design challenges including impact of density fillers in integrated technologies are also discussed.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124736001","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572420
N. Gorbatenko Nikolay, V. Semenikhina Diana, T. Privalova, I. Semenikhin Andrey
In this paper, an analysis of a perfectly conducting cylinder, covered with a layer of metamaterial, with a nonlinear loads, is carried out. The problem is solved by the method of integral equations using nonlinear boundary conditions on the surface of nonlinear load. Using a simulating of the problem in HFSS, metamaterial parameters, provided which excitation of surface waves occurs, were calculated. The radiation patterns of the structure with one nonlinear load on the fundamental frequency and on the second harmonic are shown.
{"title":"Excitation of Surface Waves on the Perfectly Conducting Cylinder, Covered with Metamaterial, with the Nonlinear Load","authors":"N. Gorbatenko Nikolay, V. Semenikhina Diana, T. Privalova, I. Semenikhin Andrey","doi":"10.23919/RADIO.2018.8572420","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572420","url":null,"abstract":"In this paper, an analysis of a perfectly conducting cylinder, covered with a layer of metamaterial, with a nonlinear loads, is carried out. The problem is solved by the method of integral equations using nonlinear boundary conditions on the surface of nonlinear load. Using a simulating of the problem in HFSS, metamaterial parameters, provided which excitation of surface waves occurs, were calculated. The radiation patterns of the structure with one nonlinear load on the fundamental frequency and on the second harmonic are shown.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126186663","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572309
J. Kasper, R. Vick
In this paper, the stochastic electromagnetic field coupling to bent transmission lines above a conductive ground plane is investigated experimentally. A special focus lies on the radiation losses due to the bend. The measurements were performed in a reverberation chamber. Different bend angles of the transmission line were measured and the radiation losses were analyzed.
{"title":"Experiment Investigation of Radiation Losses of Bent Transmission Lines in Reverberation Chambers","authors":"J. Kasper, R. Vick","doi":"10.23919/RADIO.2018.8572309","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572309","url":null,"abstract":"In this paper, the stochastic electromagnetic field coupling to bent transmission lines above a conductive ground plane is investigated experimentally. A special focus lies on the radiation losses due to the bend. The measurements were performed in a reverberation chamber. Different bend angles of the transmission line were measured and the radiation losses were analyzed.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127737383","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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