Pub Date : 2013-12-01DOI: 10.1109/AEMC.2013.7045107
T. Roshna, P. Mohanan
A novel compact Zeroth Order Resonator (ZOR) antenna with a chip inductor, for DVB-H application is presented. The zeroth resonance property makes the resonant frequency to be independent of the antenna dimension. The 2:1 VSWR bandwidth of the antenna is 20MHz and offers an omnidirectional radiation pattern.
{"title":"Modified bowtie antenna for Zeroth Order Resonance","authors":"T. Roshna, P. Mohanan","doi":"10.1109/AEMC.2013.7045107","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045107","url":null,"abstract":"A novel compact Zeroth Order Resonator (ZOR) antenna with a chip inductor, for DVB-H application is presented. The zeroth resonance property makes the resonant frequency to be independent of the antenna dimension. The 2:1 VSWR bandwidth of the antenna is 20MHz and offers an omnidirectional radiation pattern.","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":"128731853","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.2013.7045074
S. Bhanja, Mousumi Sarkar, Arijit Majumdar, Tanmay Ghoshal
A compact pulsed modulator circuit is presented which can drive pulsed IMPATT diode at Ka band with peak current of 18A and duty ratio of 0.04%. A TTL pulse generator circuit using solid state delay is developed for driving the bias circuit which has a good temperature stability. A protection circuit is also incorporated to prevent burn-out of the diode at high current. A Ka band pulsed IMPATT oscillator is designed and developed using the pulse modulator. Very low chirp is obtained using constant current source and varying the slope of the bias current pulse. A peak power of 12W has been realized with a chirp bandwidth of 150 MHz.
{"title":"A compact modulator circuit with high current protection for low chirp pulsed IMPATT oscillator","authors":"S. Bhanja, Mousumi Sarkar, Arijit Majumdar, Tanmay Ghoshal","doi":"10.1109/AEMC.2013.7045074","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045074","url":null,"abstract":"A compact pulsed modulator circuit is presented which can drive pulsed IMPATT diode at Ka band with peak current of 18A and duty ratio of 0.04%. A TTL pulse generator circuit using solid state delay is developed for driving the bias circuit which has a good temperature stability. A protection circuit is also incorporated to prevent burn-out of the diode at high current. A Ka band pulsed IMPATT oscillator is designed and developed using the pulse modulator. Very low chirp is obtained using constant current source and varying the slope of the bias current pulse. A peak power of 12W has been realized with a chirp bandwidth of 150 MHz.","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":"128860841","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.2013.7045113
S. Tripathi, S. Yadav, V. Vijay, A. Dixit, A. Mohan
We will discuss a small novel hexagonal shaped geometry for ultra wideband (UWB) monopole antenna with notch characteristics. The self-similar nature of this fractal like geometry provides higher effective antenna length and wide operating bandwidth because of the onset of multiple resonances. Notch characteristics are introduced using a rectangular slot in the ground plane, which enhances the reflection coefficient over the entire UWB frequency operating range for the proposed device. The optimized 19 mm × 15 mm dimensions, for the proposed antenna are the smallest among such geometries, exhibiting a large bandwidth from 3.1 GHz to 11.7 GHz with VSWR <; 2 over the entire frequency range. The proposed antenna demonstrates nearly omnidirectional radiation pattern, proper impedance matching, and good return loss over the entire UWB frequency range.
我们将讨论具有陷波特性的超宽带(UWB)单极天线的小型新颖六角形几何结构。这种分形几何的自相似特性提供了更高的有效天线长度和更宽的工作带宽，因为多重谐振的开始。陷波特性通过在地平面上的矩形槽引入，提高了该器件在整个UWB频率工作范围内的反射系数。该天线的优化尺寸为19 mm × 15 mm，是此类几何形状中最小的，具有3.1 GHz至11.7 GHz的大带宽，VSWR <;2在整个频率范围内。该天线在整个UWB频率范围内具有接近全向的辐射方向图、良好的阻抗匹配和良好的回波损耗。
{"title":"Hexagonal shaped fractal UWB antenna","authors":"S. Tripathi, S. Yadav, V. Vijay, A. Dixit, A. Mohan","doi":"10.1109/AEMC.2013.7045113","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045113","url":null,"abstract":"We will discuss a small novel hexagonal shaped geometry for ultra wideband (UWB) monopole antenna with notch characteristics. The self-similar nature of this fractal like geometry provides higher effective antenna length and wide operating bandwidth because of the onset of multiple resonances. Notch characteristics are introduced using a rectangular slot in the ground plane, which enhances the reflection coefficient over the entire UWB frequency operating range for the proposed device. The optimized 19 mm × 15 mm dimensions, for the proposed antenna are the smallest among such geometries, exhibiting a large bandwidth from 3.1 GHz to 11.7 GHz with VSWR <; 2 over the entire frequency range. The proposed antenna demonstrates nearly omnidirectional radiation pattern, proper impedance matching, and good return loss over the entire UWB frequency range.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"2 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":"125524256","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.2013.7045019
P. Anoop, R. Bhattacharjee
This paper investigates the crosspolar performance of a coaxial fed dual mode matched rectangular feed horn. The design of rectangular horn as matched feed for an offset parabolic reflector antenna is presented. Dominant TE10 mode is combined with TE11 mode at the horn aperture. A parametric study was carried out using HFSS to evaluate the horn performance under waveport as well as coaxial feed line excitation. Appropriate methods have been proposed for broadening operation bandwidth of the coax fed horn with a small decrease in the crosspolar performance.
{"title":"Investigation on crosspolar performance of a coaxial fed dual mode matched rectangular feed horn","authors":"P. Anoop, R. Bhattacharjee","doi":"10.1109/AEMC.2013.7045019","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045019","url":null,"abstract":"This paper investigates the crosspolar performance of a coaxial fed dual mode matched rectangular feed horn. The design of rectangular horn as matched feed for an offset parabolic reflector antenna is presented. Dominant TE10 mode is combined with TE11 mode at the horn aperture. A parametric study was carried out using HFSS to evaluate the horn performance under waveport as well as coaxial feed line excitation. Appropriate methods have been proposed for broadening operation bandwidth of the coax fed horn with a small decrease in the crosspolar performance.","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":"126313371","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.2013.7045116
M. Sujatha, K. Vinoy
A thin radar absorbing material using a stacked ring-patch array is proposed. The structure is planar, thin, broadband, and easy to design and fabricate. The structure is analyzed by simulations and experiments. The results demonstrate that the proposed structure acts as an absorber with a thickness of λ/24 at frequency 8GHz. Experimental results shows that, the structure exhibits 7% bandwidth at 10dB level. Its properties are evaluated by investigating the incident wave reflection characteristics, using CST microwave studio. The geometry is scalable to operate in different frequency ranges.
{"title":"A thin radar absorbing material using a stacked ring-patch array","authors":"M. Sujatha, K. Vinoy","doi":"10.1109/AEMC.2013.7045116","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045116","url":null,"abstract":"A thin radar absorbing material using a stacked ring-patch array is proposed. The structure is planar, thin, broadband, and easy to design and fabricate. The structure is analyzed by simulations and experiments. The results demonstrate that the proposed structure acts as an absorber with a thickness of λ/24 at frequency 8GHz. Experimental results shows that, the structure exhibits 7% bandwidth at 10dB level. Its properties are evaluated by investigating the incident wave reflection characteristics, using CST microwave studio. The geometry is scalable to operate in different frequency ranges.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"34 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":"121242097","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.2013.7045042
H. Muniganti, K. Vinoy
An easy to construct ultra-wideband microstrip antenna with about 43% bandwidth on a flexible substrate is demonstrated. It is observed that the characteristics of the antenna such as bandwidth and group delay are not degraded appreciably for this conformal array on a concave conical surface, when compared to a similar array on a planar surface. S-parameters between various elements of this array, when an object is placed in front of it, may be used for image reconstruction.
{"title":"Design of ultra wideband conformal antenna array on a concave surface for medical imaging applications","authors":"H. Muniganti, K. Vinoy","doi":"10.1109/AEMC.2013.7045042","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045042","url":null,"abstract":"An easy to construct ultra-wideband microstrip antenna with about 43% bandwidth on a flexible substrate is demonstrated. It is observed that the characteristics of the antenna such as bandwidth and group delay are not degraded appreciably for this conformal array on a concave conical surface, when compared to a similar array on a planar surface. S-parameters between various elements of this array, when an object is placed in front of it, may be used for image reconstruction.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"81 3-4 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":"116561741","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.2013.7045103
J. G. Joshi, S. Pattnaik
In this paper, a wearable microstrip patch antenna using inter-digital capacitor (IDC) and rectangular stub for 802.11 b WLAN band applications is presented. The antenna is fabricated on an inexpensive polyester cloth substrate. The antenna resonates at 2.45 GHz with the bandwidth and gain of 41 MHz and 5 dBi respectively. The electrical dimension of proposed wearable antenna is 0.213 λ × 0.246 λ. The antenna has been fabricated, tested, and the measured results are presented in the paper. The equivalent circuit analysis of this antenna is also prepared, reported and reported in the paper.
{"title":"Polyester based wearable microstrip patch antenna","authors":"J. G. Joshi, S. Pattnaik","doi":"10.1109/AEMC.2013.7045103","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045103","url":null,"abstract":"In this paper, a wearable microstrip patch antenna using inter-digital capacitor (IDC) and rectangular stub for 802.11 b WLAN band applications is presented. The antenna is fabricated on an inexpensive polyester cloth substrate. The antenna resonates at 2.45 GHz with the bandwidth and gain of 41 MHz and 5 dBi respectively. The electrical dimension of proposed wearable antenna is 0.213 λ × 0.246 λ. The antenna has been fabricated, tested, and the measured results are presented in the paper. The equivalent circuit analysis of this antenna is also prepared, reported and reported in the paper.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"124 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":"128045707","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.2013.7045047
A. Modi, J. Mehta, N. Pisharody
In this paper, optimization of optimum gain pyramidal horn Antenna for L-band has been done using Artificial Neural Networks (ANN). The ANN is trained in such a way that for any desired gain and frequency (L-band), it can generate design parameters of pyramidal horn antenna with great accuracy. The errors in the desired gain are less than 1.3%.
{"title":"Design of optimum gain L-band pyramidal horn using Artificial Neural Network","authors":"A. Modi, J. Mehta, N. Pisharody","doi":"10.1109/AEMC.2013.7045047","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045047","url":null,"abstract":"In this paper, optimization of optimum gain pyramidal horn Antenna for L-band has been done using Artificial Neural Networks (ANN). The ANN is trained in such a way that for any desired gain and frequency (L-band), it can generate design parameters of pyramidal horn antenna with great accuracy. The errors in the desired gain are less than 1.3%.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"75 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":"132759930","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.2013.7045066
Somak Bhattacharyya, Saptarshi Ghosh, K. V. Srivastava
This paper presents an ultra-thin polarization independent metamaterial microwave absorber comprising of three concentric closed ring resonators (CRR). The unit cell sizes as well as the other geometrical dimensions like radii and widths of the rings are optimized so that absorptions take place at three distinct frequencies near to the middle of the FCC radar frequency spectrum. The proposed structure shows absorptivities of 94.1%, 99.6% and 99.4% at 5.5 GHz, 9.52 GHz and 13.8 GHz respectively. The proposed structure has been studied under oblique incidence, both for TE and TM polarization where it behaves as absorber upto 60 ° incident angles in both the cases. Due to the geometrical symmetry, the structure is found to be polarization independent absorber.
{"title":"An ultra-thin polarization independent metamaterial absorber for triple band applications","authors":"Somak Bhattacharyya, Saptarshi Ghosh, K. V. Srivastava","doi":"10.1109/AEMC.2013.7045066","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045066","url":null,"abstract":"This paper presents an ultra-thin polarization independent metamaterial microwave absorber comprising of three concentric closed ring resonators (CRR). The unit cell sizes as well as the other geometrical dimensions like radii and widths of the rings are optimized so that absorptions take place at three distinct frequencies near to the middle of the FCC radar frequency spectrum. The proposed structure shows absorptivities of 94.1%, 99.6% and 99.4% at 5.5 GHz, 9.52 GHz and 13.8 GHz respectively. The proposed structure has been studied under oblique incidence, both for TE and TM polarization where it behaves as absorber upto 60 ° incident angles in both the cases. Due to the geometrical symmetry, the structure is found to be polarization independent absorber.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"37 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":"133597469","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.2013.7045055
Anshul Gupta, R. Gangwar
In this paper, the simulation study of conducting conformal strip-fed four-element linear broadside rectangular dielectric resonator antenna array is carried out using Ansoft HFSS simulation software. The Input and radiation characteristic of the proposed array has also been investigated in S-band of microwave frequencies.
{"title":"Four-element high gain conformal strip excited rectangular dielectric resonator antenna array","authors":"Anshul Gupta, R. Gangwar","doi":"10.1109/AEMC.2013.7045055","DOIUrl":"https://doi.org/10.1109/AEMC.2013.7045055","url":null,"abstract":"In this paper, the simulation study of conducting conformal strip-fed four-element linear broadside rectangular dielectric resonator antenna array is carried out using Ansoft HFSS simulation software. The Input and radiation characteristic of the proposed array has also been investigated in S-band of microwave frequencies.","PeriodicalId":169237,"journal":{"name":"2013 IEEE Applied Electromagnetics Conference (AEMC)","volume":"4 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":"132605787","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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