Pub Date : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350720
Athul O. Asok, Sukomal Dey
This work furnishes an Ultra-Wideband (UWB) Antipodal Vivaldi Antenna (AVA) utilizing a systematic approach. Initially, conventional AVA is designed for reference, and then periodic slit edges or corrugations are done at the edges of the AVA to get the desired frequency range of operation with increased gain. Moreover, periodic slots are done on the modified flares of the AVA to obtain the desired frequency range over a wider bandwidth (1.9 - 14 GHz). Finally, a tooth shaped dielectric director, with a higher dielectric constant is attached to the substrate to further improve the gain and directivity of the modified AVA. The proposed structure demonstrates a simulated gain of of 11.2 dBi, which is an improvement of 2.2 dBi over its non-dielectric counterpart.
{"title":"High Gain Elliptically Tapered Antipodal Vivaldi Antenna With Tooth Shaped Dielectric Lens","authors":"Athul O. Asok, Sukomal Dey","doi":"10.1109/APSYM50265.2020.9350720","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350720","url":null,"abstract":"This work furnishes an Ultra-Wideband (UWB) Antipodal Vivaldi Antenna (AVA) utilizing a systematic approach. Initially, conventional AVA is designed for reference, and then periodic slit edges or corrugations are done at the edges of the AVA to get the desired frequency range of operation with increased gain. Moreover, periodic slots are done on the modified flares of the AVA to obtain the desired frequency range over a wider bandwidth (1.9 - 14 GHz). Finally, a tooth shaped dielectric director, with a higher dielectric constant is attached to the substrate to further improve the gain and directivity of the modified AVA. The proposed structure demonstrates a simulated gain of of 11.2 dBi, which is an improvement of 2.2 dBi over its non-dielectric counterpart.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"73 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126106763","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350730
Shankhadip Mandal, B. Ghosh
This paper presents the design and analysis of a highly efficient energy harvesting circuit using a modified Greinacher rectifier and Luneburg lens at 2.4 GHz. The circuit is optimized for low power levels ranging from -30 dBm to -5 dBm. For 10 kΩ load, the rectifier provides an output voltage of 310 mV with a Power Conversion Efficiency (PCE) of 30.36 % for -15 dBm input power. RF power combining topology is used to combine power from multiple antennas. The use of Luneburg lens leads to an increase in received power because of its directional characteristics.
{"title":"A Highly Efficient Energy Harvesting Circuit Using Luneburg Lens","authors":"Shankhadip Mandal, B. Ghosh","doi":"10.1109/APSYM50265.2020.9350730","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350730","url":null,"abstract":"This paper presents the design and analysis of a highly efficient energy harvesting circuit using a modified Greinacher rectifier and Luneburg lens at 2.4 GHz. The circuit is optimized for low power levels ranging from -30 dBm to -5 dBm. For 10 kΩ load, the rectifier provides an output voltage of 310 mV with a Power Conversion Efficiency (PCE) of 30.36 % for -15 dBm input power. RF power combining topology is used to combine power from multiple antennas. The use of Luneburg lens leads to an increase in received power because of its directional characteristics.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121489588","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350727
Priyanka Das, K. Mandal
Two Multiband Circular Polarization Conversion (CPC) structures using FSS have been introduced for practical applications in this article. An elliptical patch wideband antenna operating from 5-13.8 GHz is integrated with a novel single layer metal backed modifed I shaped FSS based reflection mode circular polarizer (CP).This polarizer operates at multiple frequencies 7.2, 8, 8.2, 8.3 and 10.4 GHz respectively . Further, a single layer transmission mode FSS based polarization converter comprising double P shaped unit cells is realized which accomplishes CP generation at 10.2, 10.4, 10.6, 10.8, 11 and 11.2 GHz . An axial ratio of less than 3 dB and phase difference of 90° (or an odd multiple of 90°) is obtained between the TE and TM transmissions which ratifies the generation of CP at multiple frequencies . The radiation performance of the microstrip patch antenna is undegraded when used in conjunction with either of the LP-CP polarization converters at the operating frequencies as validated through full wave simulations in HFSS. The formation of CP is illustrated through E field distribution and polarization ellipses.
{"title":"Multiband Reflection and Transmission mode Linear to Circular Polarizer integrated Microstrip Patch Antenna","authors":"Priyanka Das, K. Mandal","doi":"10.1109/APSYM50265.2020.9350727","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350727","url":null,"abstract":"Two Multiband Circular Polarization Conversion (CPC) structures using FSS have been introduced for practical applications in this article. An elliptical patch wideband antenna operating from 5-13.8 GHz is integrated with a novel single layer metal backed modifed I shaped FSS based reflection mode circular polarizer (CP).This polarizer operates at multiple frequencies 7.2, 8, 8.2, 8.3 and 10.4 GHz respectively . Further, a single layer transmission mode FSS based polarization converter comprising double P shaped unit cells is realized which accomplishes CP generation at 10.2, 10.4, 10.6, 10.8, 11 and 11.2 GHz . An axial ratio of less than 3 dB and phase difference of 90° (or an odd multiple of 90°) is obtained between the TE and TM transmissions which ratifies the generation of CP at multiple frequencies . The radiation performance of the microstrip patch antenna is undegraded when used in conjunction with either of the LP-CP polarization converters at the operating frequencies as validated through full wave simulations in HFSS. The formation of CP is illustrated through E field distribution and polarization ellipses.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122203373","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350734
Priyanka Das, K. Mandal
A reconfigurable all dielectric FSS based filter has been proposed which exhibits band-pass and band-stop filtering actions in the same band by tailoring the constructional parameters mechanically without changing the dimensions of the unit cell .Band-stop operation is conceived from 3.3-6.8 GHz by conglomerating four hexagonal prisms made of AD410 with a cuboidal structure made of AD1000L.The removal of the hexagonal prisms makes the cuboidal structure function as a band-pass filter from 3.8-7.4 GHz. Switching between bandpass and bandstop filtering action is thus realized in the frequency range 3.8-6.8 GHz.
{"title":"Reconfigurable All Dielectric 3D FSS Filter","authors":"Priyanka Das, K. Mandal","doi":"10.1109/APSYM50265.2020.9350734","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350734","url":null,"abstract":"A reconfigurable all dielectric FSS based filter has been proposed which exhibits band-pass and band-stop filtering actions in the same band by tailoring the constructional parameters mechanically without changing the dimensions of the unit cell .Band-stop operation is conceived from 3.3-6.8 GHz by conglomerating four hexagonal prisms made of AD410 with a cuboidal structure made of AD1000L.The removal of the hexagonal prisms makes the cuboidal structure function as a band-pass filter from 3.8-7.4 GHz. Switching between bandpass and bandstop filtering action is thus realized in the frequency range 3.8-6.8 GHz.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126652259","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350672
A. Ghosh, D. Chakravarty
A stepped impedance stub loaded phase shifter is reported in this work. The design steps are discussed, and the design prototype is fabricated. The equation for phase shifter is also derived using ABCD parameter. The bandwidth of the phase shifter circuit is 60% for 900 relative phase shift between 3.8 GHz to 7 GHz. The ripple factor of this proposed phase shifter is also in between ±5% for operating bandwidth. The measurement results for the phase shifter cuircuit is presented, which depicted that the insertion loss is 0.5dB within 3.8 GHz to 7 GHz.
{"title":"Design of Stepped Impedance Stub Loaded Wide-Band 90-Degree Phase Shifter","authors":"A. Ghosh, D. Chakravarty","doi":"10.1109/APSYM50265.2020.9350672","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350672","url":null,"abstract":"A stepped impedance stub loaded phase shifter is reported in this work. The design steps are discussed, and the design prototype is fabricated. The equation for phase shifter is also derived using ABCD parameter. The bandwidth of the phase shifter circuit is 60% for 900 relative phase shift between 3.8 GHz to 7 GHz. The ripple factor of this proposed phase shifter is also in between ±5% for operating bandwidth. The measurement results for the phase shifter cuircuit is presented, which depicted that the insertion loss is 0.5dB within 3.8 GHz to 7 GHz.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130941523","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350675
V. P, B. Ghosh
This paper presents a metasurface (MTS) to generate a flat-top pattern using phase compensation method. The proposed flat top pattern is realized by diving the entire MTS into four sub regions which directs the beam in different directions. The metasurface is designed with an array of 15x15 unitcells where each unitcell comprises of an four-layered elliptical patch surrounded by a square ring. The beam pointing angle for each sub region is optimized to achieve nearly constant gain throughout the desired angular section. The simulation results show a flat-top pattern with a ripple factor less than 1 dB in the interval [−15° to15°] at the designed frequency of 10 GHz and 12 GHz.
{"title":"Dual-Band Flat-Top Pattern Synthesis Using Phase Gradient Metasurface","authors":"V. P, B. Ghosh","doi":"10.1109/APSYM50265.2020.9350675","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350675","url":null,"abstract":"This paper presents a metasurface (MTS) to generate a flat-top pattern using phase compensation method. The proposed flat top pattern is realized by diving the entire MTS into four sub regions which directs the beam in different directions. The metasurface is designed with an array of 15x15 unitcells where each unitcell comprises of an four-layered elliptical patch surrounded by a square ring. The beam pointing angle for each sub region is optimized to achieve nearly constant gain throughout the desired angular section. The simulation results show a flat-top pattern with a ripple factor less than 1 dB in the interval [−15° to15°] at the designed frequency of 10 GHz and 12 GHz.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121602464","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350709
M. Joseph, S. Femina Beegum, K. Mukundan
High gain and omnidirectional coverage are the challenging requirement for launch vehicle antenna design. Generally cylindrical array configuration is considered for omnidirectional coverage. This can give 3600 coverage in the azimuth direction. The Number of elements and their position has to be optimized based on cylinder radius for ripple free radiation pattern in the azimuth plane. This paper presents the optimization of cylindrical array using Particle Swarm Optimization (PSO) technique. Analysis of patch array resonating at 2.26GHz mounted on cylinders of 300mm and 2m diameter for omnidirectional radiation pattern is carried out using in-house developed matlab program and the results are compared with the simulation results of HFSS software.
{"title":"Optimization of Patch Antenna Array Mounted on a Cylinder for Launch Vehicle Applications","authors":"M. Joseph, S. Femina Beegum, K. Mukundan","doi":"10.1109/APSYM50265.2020.9350709","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350709","url":null,"abstract":"High gain and omnidirectional coverage are the challenging requirement for launch vehicle antenna design. Generally cylindrical array configuration is considered for omnidirectional coverage. This can give 3600 coverage in the azimuth direction. The Number of elements and their position has to be optimized based on cylinder radius for ripple free radiation pattern in the azimuth plane. This paper presents the optimization of cylindrical array using Particle Swarm Optimization (PSO) technique. Analysis of patch array resonating at 2.26GHz mounted on cylinders of 300mm and 2m diameter for omnidirectional radiation pattern is carried out using in-house developed matlab program and the results are compared with the simulation results of HFSS software.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129236299","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350718
Neha Singh, Saurabh Kumar
A miniaturized antenna with a simple approach to generate CP over a wide frequency range is presented in this communication. The proposed design consists of an unsymmetrical slotted ground and two horizontal radiating elements that are attached to the feed-in the direction opposite to each other. The resulting ARBW attained with this design stage is 33.06% (3.66-5.11 GHz). To further enhance the axial ratio bandwidth (ARBW), modifications in the ground plane are made by adding two radiating parasitic elements in the vertical direction. The final proposed antenna features a compact geometry with a dimension of 28×28 mm2 and ARBW (AR≤ 3-dB) of 47.42% (3.7-6 GHz) within the -10dB impedance bandwidth (IBW) of 66.12% (3.27-6.5 GHz).
{"title":"Simple and Compact Antenna with Enhanced ARBW Using Unsymmetrical Modified Slotted Ground","authors":"Neha Singh, Saurabh Kumar","doi":"10.1109/APSYM50265.2020.9350718","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350718","url":null,"abstract":"A miniaturized antenna with a simple approach to generate CP over a wide frequency range is presented in this communication. The proposed design consists of an unsymmetrical slotted ground and two horizontal radiating elements that are attached to the feed-in the direction opposite to each other. The resulting ARBW attained with this design stage is 33.06% (3.66-5.11 GHz). To further enhance the axial ratio bandwidth (ARBW), modifications in the ground plane are made by adding two radiating parasitic elements in the vertical direction. The final proposed antenna features a compact geometry with a dimension of 28×28 mm2 and ARBW (AR≤ 3-dB) of 47.42% (3.7-6 GHz) within the -10dB impedance bandwidth (IBW) of 66.12% (3.27-6.5 GHz).","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129098582","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 : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350687
P. Sathishkannan, K.F Sajeev, S. Raman, M. Gopikrishna
In this paper, we investigate the pertinent characteristics of a metamaterial square spiral resonator in realizing a compact bandpass filter operating in the 3.5-3.7 GHz 5G band. The resonators designed by analytical modelling and full wave simulations are incorporated as broad side coupled structures between two parallel input and output microstrip lines. By incorporating radial stubs in the microstrip line, the stop band performance of the filter is improved approximately up to three times the operating frequency. It exhibits competitive attenuation slopes of 79.4 and 67.46 dB/GHz in the lower and upper pass band edges respectively. Electrical size of the proposed filter is just 0.44 × 0.44 $lambda _g^2$. Operating frequency of the filter can be easily tuned by redesigning the resonators with the design guidelines presented in this article. The proposed filter uses no grounded structures, vias, defected ground or multilayer structures, and hence can be easily fabricated and integrated to microwave circuitry.
{"title":"A quasi-elliptic Band Pass Filter designed using quadruplet metamaterial resonators for operation in the 3 GHz (5G) Band","authors":"P. Sathishkannan, K.F Sajeev, S. Raman, M. Gopikrishna","doi":"10.1109/APSYM50265.2020.9350687","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350687","url":null,"abstract":"In this paper, we investigate the pertinent characteristics of a metamaterial square spiral resonator in realizing a compact bandpass filter operating in the 3.5-3.7 GHz 5G band. The resonators designed by analytical modelling and full wave simulations are incorporated as broad side coupled structures between two parallel input and output microstrip lines. By incorporating radial stubs in the microstrip line, the stop band performance of the filter is improved approximately up to three times the operating frequency. It exhibits competitive attenuation slopes of 79.4 and 67.46 dB/GHz in the lower and upper pass band edges respectively. Electrical size of the proposed filter is just 0.44 × 0.44 $lambda _g^2$. Operating frequency of the filter can be easily tuned by redesigning the resonators with the design guidelines presented in this article. The proposed filter uses no grounded structures, vias, defected ground or multilayer structures, and hence can be easily fabricated and integrated to microwave circuitry.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114419542","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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