Pub Date : 2013-12-01DOI: 10.1109/AEMC.2013.7045093
P. Prajapati, G. G. K. Murthy, A. Patnaik, M. V. Kartikeyan
A novel asymmetric plus shaped fractal slotted microstrip antenna with a Yagi-Uda concept for circularly polarized radiation and high gain has been proposed for radio frequency identification (RFID) applications. Four asymmetric plus shape slots are embedded symmetrically in the center of all four quadrants of square patch. To increase the gain, Yagi-Uda concept has been proposed. To suppress undesirable higher harmonics, dumbbell shape defected ground structure (DGS) has been introduced at the ground layer of the antenna. To compensate the reduction of the gain due to DGS, self-similar structure (fractal) of plus shape is integrated with all four plus shape slots. The 3 dB axial ratio (AR) bandwidth of 4 MHz at center frequency of 862 MHz, 10 dB impedance bandwidth of 13.20 MHz and a gain of 4.25 dB have been achieved with the proposed antenna.
{"title":"Asymmetrical plus shaped fractal slotted multilayered Yagi-Uda circularly polarized microstrip antenna with DGS","authors":"P. Prajapati, G. G. K. Murthy, A. Patnaik, M. V. Kartikeyan","doi":"10.1109/AEMC.2013.7045093","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045093","url":null,"abstract":"A novel asymmetric plus shaped fractal slotted microstrip antenna with a Yagi-Uda concept for circularly polarized radiation and high gain has been proposed for radio frequency identification (RFID) applications. Four asymmetric plus shape slots are embedded symmetrically in the center of all four quadrants of square patch. To increase the gain, Yagi-Uda concept has been proposed. To suppress undesirable higher harmonics, dumbbell shape defected ground structure (DGS) has been introduced at the ground layer of the antenna. To compensate the reduction of the gain due to DGS, self-similar structure (fractal) of plus shape is integrated with all four plus shape slots. The 3 dB axial ratio (AR) bandwidth of 4 MHz at center frequency of 862 MHz, 10 dB impedance bandwidth of 13.20 MHz and a gain of 4.25 dB have been achieved with the proposed antenna.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"50 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114028901","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045120
S. Agarwal, N. Pathak, Dharmendra Singh
A novel dual band millimeter wave antenna has been designed that covers two different frequencies of W band (75 GHz to 110 GHz). The antenna structure consists of two parasitically coupled patches and a stepped impedance slot in the feedline. The two resonant frequencies are 83 GHz and 94 GHz, that are used for high data rate communication and millimeter wave imaging applications, respectively. The return loss bandwidth at 83 GHz is 6.6% (5.45 GHz) and at 94 GHz is 3.4% (3.2 GHz). The simulated gain at two frequencies is 8.4 dbi and 8.9 dbi at 83 and 94 GHz, respectively. Further, a scaled antenna prototype is fabricated and measurement results are compared with the simulated ones.
{"title":"Concurrent 83GHz/94 GHz parasitically coupled defected microstrip feedline antenna for millimeter wave applications","authors":"S. Agarwal, N. Pathak, Dharmendra Singh","doi":"10.1109/AEMC.2013.7045120","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045120","url":null,"abstract":"A novel dual band millimeter wave antenna has been designed that covers two different frequencies of W band (75 GHz to 110 GHz). The antenna structure consists of two parasitically coupled patches and a stepped impedance slot in the feedline. The two resonant frequencies are 83 GHz and 94 GHz, that are used for high data rate communication and millimeter wave imaging applications, respectively. The return loss bandwidth at 83 GHz is 6.6% (5.45 GHz) and at 94 GHz is 3.4% (3.2 GHz). The simulated gain at two frequencies is 8.4 dbi and 8.9 dbi at 83 and 94 GHz, respectively. Further, a scaled antenna prototype is fabricated and measurement results are compared with the simulated ones.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133987480","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045026
M. Wahid, M. Sreenivasan, P. H. Rao
The effects of corporate feed network on the performance of low sidelobe level (SLL) planar array operating in X-band are analyzed. The impedance distribution at the individual sub-arrays is optimized to suppress the effects of corporate feed radiation and to achieve the required low sidelobe level (~20dB). Conventional planar feed design exhibited a distorted radiation pattern with second sidelobe level shooting upto -14dB. The proposed approach reduces the second sidelobe level and maintains nearly Gaussian tapered radiation pattern over the angle. Measured gain of the array is 21dB.
{"title":"Design optmization Of low sidelobe level microstrip array","authors":"M. Wahid, M. Sreenivasan, P. H. Rao","doi":"10.1109/AEMC.2013.7045026","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045026","url":null,"abstract":"The effects of corporate feed network on the performance of low sidelobe level (SLL) planar array operating in X-band are analyzed. The impedance distribution at the individual sub-arrays is optimized to suppress the effects of corporate feed radiation and to achieve the required low sidelobe level (~20dB). Conventional planar feed design exhibited a distorted radiation pattern with second sidelobe level shooting upto -14dB. The proposed approach reduces the second sidelobe level and maintains nearly Gaussian tapered radiation pattern over the angle. Measured gain of the array is 21dB.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133602304","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045031
Satyadeep Das, S. Sahu, J. Panda
High Frequency Inset-fed compact CPW slot antennas a conventional wideband slot antenna with fractal stub modified by a parasitic line surrounding the fractal stub, affecting the multiband operation suitable for applications in wireless communication system. The proposed antenna resonates at four frequency bands at centre frequencies 4.25, 5.55, 8.5, 9.3 GHz. The first resonant band extends from 3.6GHz to 4.2GHz which is the operation band of wireless. Effectively consistent radiation pattern and gain have been observed. The proposed antenna is small and compact in size, providing consistent radiation pattern, broadband impedance matching and approximate gain characteristics. The proposed antenna is size reduction of 62.5%.
{"title":"Compact multiband CPW antenna with fractal stub","authors":"Satyadeep Das, S. Sahu, J. Panda","doi":"10.1109/AEMC.2013.7045031","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045031","url":null,"abstract":"High Frequency Inset-fed compact CPW slot antennas a conventional wideband slot antenna with fractal stub modified by a parasitic line surrounding the fractal stub, affecting the multiband operation suitable for applications in wireless communication system. The proposed antenna resonates at four frequency bands at centre frequencies 4.25, 5.55, 8.5, 9.3 GHz. The first resonant band extends from 3.6GHz to 4.2GHz which is the operation band of wireless. Effectively consistent radiation pattern and gain have been observed. The proposed antenna is small and compact in size, providing consistent radiation pattern, broadband impedance matching and approximate gain characteristics. The proposed antenna is size reduction of 62.5%.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129497270","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045090
V. Rathore, S. Awasthi, A. Biswas
This paper discusses the coupling coefficients for electric, magnetic and mixed coupling between synchronous Split Ring Resonators (SRR) using HFSS eigen mode solver. Coupling coefficient variation with the spacing between the coupled resonators has been given which can be used to design microwave filters using SRR. The identification of couplings has been done by observing the current densities of the coupled SRR.
{"title":"Coupling properties of Split Ring Resonator for filter applications","authors":"V. Rathore, S. Awasthi, A. Biswas","doi":"10.1109/AEMC.2013.7045090","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045090","url":null,"abstract":"This paper discusses the coupling coefficients for electric, magnetic and mixed coupling between synchronous Split Ring Resonators (SRR) using HFSS eigen mode solver. Coupling coefficient variation with the spacing between the coupled resonators has been given which can be used to design microwave filters using SRR. The identification of couplings has been done by observing the current densities of the coupled SRR.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114393636","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045071
K. Selvan, H. Ramachandran
Indian engineering education holds promises and offers challenges, both at the same time. In this invited talk, these promises and challenges are briefly reviewed. When considered in conjunction with the expectations from modern engineering graduates, it emerges that the intellectual demands on our academic institutions are rather heavy. The central role faculty has in this context is highlighted. Possible steps that may be desirable in respect of quality improvement are also pointed out.
{"title":"Perspectives on Indian engineering education","authors":"K. Selvan, H. Ramachandran","doi":"10.1109/AEMC.2013.7045071","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045071","url":null,"abstract":"Indian engineering education holds promises and offers challenges, both at the same time. In this invited talk, these promises and challenges are briefly reviewed. When considered in conjunction with the expectations from modern engineering graduates, it emerges that the intellectual demands on our academic institutions are rather heavy. The central role faculty has in this context is highlighted. Possible steps that may be desirable in respect of quality improvement are also pointed out.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"1998 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117028537","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045034
H. Pradhan, B. B. Mangaraj, I. S. Misra
Particle Swarm Optimization (PSO) algorithm is introduced here to optimize the element spacings and lengths of a mutually coupled Planar Array Antenna to have maximum Directivity (D), minimum Half Power Beam Width (HPBW) and Front to Side Lobe Level (FSLL). The array is simulated with MOM structure code using MATLAB (7.8.0.347) and verified using standard MININEC (14.0) software package for UHF application. The results obtained using PSO for our structure are compared with different structures of antennas of other authors, optimized using various optimization techniques for its performance evaluation.
{"title":"Designing and optimizing a mutually coupled Planar Array Antenna using PSO for UHF application","authors":"H. Pradhan, B. B. Mangaraj, I. S. Misra","doi":"10.1109/AEMC.2013.7045034","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045034","url":null,"abstract":"Particle Swarm Optimization (PSO) algorithm is introduced here to optimize the element spacings and lengths of a mutually coupled Planar Array Antenna to have maximum Directivity (D), minimum Half Power Beam Width (HPBW) and Front to Side Lobe Level (FSLL). The array is simulated with MOM structure code using MATLAB (7.8.0.347) and verified using standard MININEC (14.0) software package for UHF application. The results obtained using PSO for our structure are compared with different structures of antennas of other authors, optimized using various optimization techniques for its performance evaluation.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116255520","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045095
S. Ghosal, S. Chaudhuri
The effects of parametric variation of a rectangular slot on a square microstrip patch antenna (MSPA) have been analyzed from physical perspective, along with an equivalent circuit model.
从物理角度分析了矩形缝隙参数变化对方形微带贴片天线的影响，并建立了等效电路模型。
{"title":"Analysis of a rectangular slot on a microstrip patch antenna with an equivalent circuit model","authors":"S. Ghosal, S. Chaudhuri","doi":"10.1109/AEMC.2013.7045095","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045095","url":null,"abstract":"The effects of parametric variation of a rectangular slot on a square microstrip patch antenna (MSPA) have been analyzed from physical perspective, along with an equivalent circuit model.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129946485","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045054
D. Ganguly, D. Guha, Sanghamitro Das, A. Rojatkar
Monocycle pulses are commonly used to analyze ultra wideband (UWB) antennas in time domain. But no standard guideline is available to estimate its accurate pulsewidth. In this paper, we propose a new technique and examine the same for a UWB monopole antenna. This approach should alleviate present lacunae in time domain analysis and help one to obtain accurate characteristics theoretically.
{"title":"Time domain studies of ultra wideband monopole: Theoretical study to alleviate ambiguities","authors":"D. Ganguly, D. Guha, Sanghamitro Das, A. Rojatkar","doi":"10.1109/AEMC.2013.7045054","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045054","url":null,"abstract":"Monocycle pulses are commonly used to analyze ultra wideband (UWB) antennas in time domain. But no standard guideline is available to estimate its accurate pulsewidth. In this paper, we propose a new technique and examine the same for a UWB monopole antenna. This approach should alleviate present lacunae in time domain analysis and help one to obtain accurate characteristics theoretically.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131555811","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 : 2013-12-01DOI: 10.1109/AEMC.2013.7045094
D. Sarkar, K. Saurav, K. V. Srivastava
This paper presents the design of a novel dual-band coax-fed microstrip patch antenna (MPA), loaded with a fractal complementary split ring resonator (CSRR) for dual-band operation and partially defected ground structure (PDGS) for bandwidth enhancement. The proposed antenna operates in the WiMAX (Worldwide Interoperability for Microwave Access, 3.3-3.8 GHz) and entire WLAN (Wireless Local Area Network, 5.15-5.85 GHz) frequency bands with satisfactory far-field gain and efficiency.
{"title":"A novel dual-band microstrip patch antenna loaded with fractal CSRR and partially defected ground structures","authors":"D. Sarkar, K. Saurav, K. V. Srivastava","doi":"10.1109/AEMC.2013.7045094","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045094","url":null,"abstract":"This paper presents the design of a novel dual-band coax-fed microstrip patch antenna (MPA), loaded with a fractal complementary split ring resonator (CSRR) for dual-band operation and partially defected ground structure (PDGS) for bandwidth enhancement. The proposed antenna operates in the WiMAX (Worldwide Interoperability for Microwave Access, 3.3-3.8 GHz) and entire WLAN (Wireless Local Area Network, 5.15-5.85 GHz) frequency bands with satisfactory far-field gain and efficiency.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133182200","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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