Pub Date : 2020-12-14DOI: 10.1109/APSYM50265.2020.9350685
A. Ghosh, D. Chakravarty
The effect of sinusoidal nonlinearity function in FMCW SAR system is investigated and phase error correction algorithm is addressed to detect target. The Mathematical explanation for non-linearity compensation in Synthetic Aperture Radar (SAR) system is presented with proper signal processing chain. This processing approach shows improvement in target detection in simulation results. The frequency modulated continuous wave synthetic aperture radar with 0.25 GHz bandwidth and center frequency of 2.4 GHz is considered. The frequency of error signal is 50 KHz with a variation of sine function. In this case, the sweeping time of VCO is 10msec. More than one target are considered in simulation at a time with their different position to investigate and verify the proposed approach for compensation of VCO non-linearity in frequency sweep in VCO.
{"title":"Non-Linearity Compensation Algorithm for FMCW SAR","authors":"A. Ghosh, D. Chakravarty","doi":"10.1109/APSYM50265.2020.9350685","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350685","url":null,"abstract":"The effect of sinusoidal nonlinearity function in FMCW SAR system is investigated and phase error correction algorithm is addressed to detect target. The Mathematical explanation for non-linearity compensation in Synthetic Aperture Radar (SAR) system is presented with proper signal processing chain. This processing approach shows improvement in target detection in simulation results. The frequency modulated continuous wave synthetic aperture radar with 0.25 GHz bandwidth and center frequency of 2.4 GHz is considered. The frequency of error signal is 50 KHz with a variation of sine function. In this case, the sweeping time of VCO is 10msec. More than one target are considered in simulation at a time with their different position to investigate and verify the proposed approach for compensation of VCO non-linearity in frequency sweep in VCO.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"602 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":"123202137","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/APSYM50265.2020.9350686
G. R, C. Saha
This paper proposes the design of a new multi-port frequency scanning antenna system for high Peak to Average Power Ratio (PAPR) signals. The symmetrical structure of the antenna ensures the power combining operation along with directive radiation. An angular range of 31° over an operating frequency range of 22 GHz to 25.8 GHz is observed in the 3D electromagnetic solver simulation with radiation efficiency better than 75%.
{"title":"Multi-Port Driven Frequency Scanning Antenna System for High PAPR Signals","authors":"G. R, C. Saha","doi":"10.1109/APSYM50265.2020.9350686","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350686","url":null,"abstract":"This paper proposes the design of a new multi-port frequency scanning antenna system for high Peak to Average Power Ratio (PAPR) signals. The symmetrical structure of the antenna ensures the power combining operation along with directive radiation. An angular range of 31° over an operating frequency range of 22 GHz to 25.8 GHz is observed in the 3D electromagnetic solver simulation with radiation efficiency better than 75%.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"10 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":"123418665","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/APSYM50265.2020.9350714
A. R, A. P, Jasmine P M, Rekha T K
The paper presents dual split ring aperture coupled hemispherical dielectric resonator antenna excited by microstrip feed for frequency tuning. The angle of rotation of the dual split ring is changed in order to tune the dual-band resonant frequency. The proposed antenna exhibits good radiation characters and it remains the same on varying the frequency. It’s mainly used in WiMAX application.
{"title":"Frequency Reconfigurable Hemispherical Dielectric Resonator Antenna Using Dual Split Rings","authors":"A. R, A. P, Jasmine P M, Rekha T K","doi":"10.1109/APSYM50265.2020.9350714","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350714","url":null,"abstract":"The paper presents dual split ring aperture coupled hemispherical dielectric resonator antenna excited by microstrip feed for frequency tuning. The angle of rotation of the dual split ring is changed in order to tune the dual-band resonant frequency. The proposed antenna exhibits good radiation characters and it remains the same on varying the frequency. It’s mainly used in WiMAX application.","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":"131293470","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/APSYM50265.2020.9350737
Ms.Manpreet kaur, H. Singh
In this paper, a high isolated multiple input multiple output (MIMO) configuration planar inverted-F antenna (PIFA) has been presented in favor of mobile handset application. The isolation is enhanced by using an array of the metamaterial absorber which is placed in center of two antenna elements at a centre frequency of 5.65GHz. The proposed antenna geometry consists of swastika shaped design on the FR-4 substrate having dimensions of 7mm × 7mm × 0.8mm at a height of 2.8mm commencing from the ground surface having dimensions 100mm × 50mm × 0.8mm. An array of 4 × 4 unit cell of metamaterial absorber is used to enhance isolation in the midst of antenna elements. Results show that the isolation in the midst of antenna elements has improved from -12dB to -25dB at the resonance frequency 5.65GHz. Further, S-parameters, radiation characteristics, and diversity parameters are analyzed and found suitable for mobile handset.
{"title":"Isolation Improvement of the MIMO PIFA using Metamaterial Absorber Array","authors":"Ms.Manpreet kaur, H. Singh","doi":"10.1109/APSYM50265.2020.9350737","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350737","url":null,"abstract":"In this paper, a high isolated multiple input multiple output (MIMO) configuration planar inverted-F antenna (PIFA) has been presented in favor of mobile handset application. The isolation is enhanced by using an array of the metamaterial absorber which is placed in center of two antenna elements at a centre frequency of 5.65GHz. The proposed antenna geometry consists of swastika shaped design on the FR-4 substrate having dimensions of 7mm × 7mm × 0.8mm at a height of 2.8mm commencing from the ground surface having dimensions 100mm × 50mm × 0.8mm. An array of 4 × 4 unit cell of metamaterial absorber is used to enhance isolation in the midst of antenna elements. Results show that the isolation in the midst of antenna elements has improved from -12dB to -25dB at the resonance frequency 5.65GHz. Further, S-parameters, radiation characteristics, and diversity parameters are analyzed and found suitable for mobile handset.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"88 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121009560","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/APSYM50265.2020.9350733
Deven G. Patanvariya, A. Chatterjee
This paper presents a compact triple-band circularly polarized two-port antenna for multiple-input multiple-output (MIMO) applications. The proposed antenna is designed by using simple stub geometry, multi-slit, and multi-slot techniques. In order to realize the proposed CP antenna, one stub has been embedded in the feed-line. By embedding stub in the feed-line and removing two slits from the ground plane, the S-parameters and axial ratio bandwidths have been noticeably increased. The MIMO antenna has a low-profile geometry and a dimension of 16 × 16 × 0.82 mm3. As a result, the three notched bands are good in existing interference bands of C-band (6.21 – 6.63 GHz), lower Ku-band (12.1−13.01 GHz), and lower K-band (18.24−21.01 GHz). In addition, the axial ratio bandwidth over the resonating bands are 3.79% (6.27 − 6.53 GHz), 24.20% (10.44 − 13.30 GHz), and 3.81% (18.81 − 19.54 GHz), respectively. The proposed MIMO antenna has a stable radiation pattern, sufficient gain, and low envelop correlation coefficient (ECC < 0.02) over the resonating bands, which is suitable for MIMO system applications.
{"title":"A Compact Triple-Band Circularly Polarized Slot Antenna for MIMO System","authors":"Deven G. Patanvariya, A. Chatterjee","doi":"10.1109/APSYM50265.2020.9350733","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350733","url":null,"abstract":"This paper presents a compact triple-band circularly polarized two-port antenna for multiple-input multiple-output (MIMO) applications. The proposed antenna is designed by using simple stub geometry, multi-slit, and multi-slot techniques. In order to realize the proposed CP antenna, one stub has been embedded in the feed-line. By embedding stub in the feed-line and removing two slits from the ground plane, the S-parameters and axial ratio bandwidths have been noticeably increased. The MIMO antenna has a low-profile geometry and a dimension of 16 × 16 × 0.82 mm3. As a result, the three notched bands are good in existing interference bands of C-band (6.21 – 6.63 GHz), lower Ku-band (12.1−13.01 GHz), and lower K-band (18.24−21.01 GHz). In addition, the axial ratio bandwidth over the resonating bands are 3.79% (6.27 − 6.53 GHz), 24.20% (10.44 − 13.30 GHz), and 3.81% (18.81 − 19.54 GHz), respectively. The proposed MIMO antenna has a stable radiation pattern, sufficient gain, and low envelop correlation coefficient (ECC < 0.02) over the resonating bands, which is suitable for MIMO system applications.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"35 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":"128606099","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/apsym50265.2020.9350722
Z. Shen, Chairman Welcomes You, J. Maxwell
{"title":"Our Tribute to Great Pioneers","authors":"Z. Shen, Chairman Welcomes You, J. Maxwell","doi":"10.1109/apsym50265.2020.9350722","DOIUrl":"https://doi.org/10.1109/apsym50265.2020.9350722","url":null,"abstract":"","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":"124631162","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/APSYM50265.2020.9350710
Soumik Dey, Nandipati Sai Kiran, Sukomal Dey
This work presents microstrip and Substrate Integrated Waveguide (SIW) based monopulse comparators (MC) working at two different frequency bands for automated target detection. Center frequencies of the comparators are 3.5 GHz and 28 GHz with their operating bands fall in the sub-6 GHz and millimeter wave frequency range. Planar microstrip line based design is adopted for making the comparator at lower band. Simulation result shows simulated impedance matching of > 14.4 dB at the input ports over 3.4-3.6 GHz. The maximum phase deviation at the sum port of the comparator is 2.2°. At the millimeter wave range of 27.75-28.25 GHz, comparators are designed for working in a single plane and dual plane configuration. SIW is used to design these two comparators at millimeter wave. Single plane MC shows average differential phases at its sum and difference ports are -1.34° and 176.58°, respectively, with a minimum simulated return loss of > 16.26 dB at the input ports. The maximum simulated phase deviation at the sum port of dual plane SIW MC is 13.8° with impedance matching > 15.5 dB for the input ports of the comparator.
{"title":"Microstrip and SIW based Monopulse Comparators for Microwave and Millimeter Wave Applications","authors":"Soumik Dey, Nandipati Sai Kiran, Sukomal Dey","doi":"10.1109/APSYM50265.2020.9350710","DOIUrl":"https://doi.org/10.1109/APSYM50265.2020.9350710","url":null,"abstract":"This work presents microstrip and Substrate Integrated Waveguide (SIW) based monopulse comparators (MC) working at two different frequency bands for automated target detection. Center frequencies of the comparators are 3.5 GHz and 28 GHz with their operating bands fall in the sub-6 GHz and millimeter wave frequency range. Planar microstrip line based design is adopted for making the comparator at lower band. Simulation result shows simulated impedance matching of > 14.4 dB at the input ports over 3.4-3.6 GHz. The maximum phase deviation at the sum port of the comparator is 2.2°. At the millimeter wave range of 27.75-28.25 GHz, comparators are designed for working in a single plane and dual plane configuration. SIW is used to design these two comparators at millimeter wave. Single plane MC shows average differential phases at its sum and difference ports are -1.34° and 176.58°, respectively, with a minimum simulated return loss of > 16.26 dB at the input ports. The maximum simulated phase deviation at the sum port of dual plane SIW MC is 13.8° with impedance matching > 15.5 dB for the input ports of the comparator.","PeriodicalId":325720,"journal":{"name":"2020 International Symposium on Antennas & Propagation (APSYM)","volume":"23 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":"128319066","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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