Pub Date : 2009-03-02DOI: 10.1109/IWAT.2009.4906958
Daniel N. Evans, M. Jensen
A recent method has been proposed for determining the optimal radiation characteristics of antennas that maximize the diversity gain for a given antenna aperture and power angular spectrum of the field. Since this approach results in antennas whose current distributions overlap in the aperture, however, the resulting designs are impractical. This paper proposes several methods which construct the radiation characteristics for non-overlapping currents. Computational results show that the resulting diversity performance of the designed antennas is good but sub-optimal.
{"title":"Near-optimal radiation characteristics for diversity antenna design","authors":"Daniel N. Evans, M. Jensen","doi":"10.1109/IWAT.2009.4906958","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906958","url":null,"abstract":"A recent method has been proposed for determining the optimal radiation characteristics of antennas that maximize the diversity gain for a given antenna aperture and power angular spectrum of the field. Since this approach results in antennas whose current distributions overlap in the aperture, however, the resulting designs are impractical. This paper proposes several methods which construct the radiation characteristics for non-overlapping currents. Computational results show that the resulting diversity performance of the designed antennas is good but sub-optimal.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123029357","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906865
E. Nishiyama, T. Itoh
In this paper, a dual polarized widely tunable stacked microstrip antenna is proposed and is investigated by simulation and measurement. Eight varactor diodes are embedded along the edges of the patch to realize the proposed tuning capability. The stacked structure is used to compensate for varactor loss. Consequently, a wide tuning range of 63% is achieved with a gain variation of 1.0–9.3dBi.
{"title":"Dual polarized widely tunable stacked microstrip antenna using varactor diodes","authors":"E. Nishiyama, T. Itoh","doi":"10.1109/IWAT.2009.4906865","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906865","url":null,"abstract":"In this paper, a dual polarized widely tunable stacked microstrip antenna is proposed and is investigated by simulation and measurement. Eight varactor diodes are embedded along the edges of the patch to realize the proposed tuning capability. The stacked structure is used to compensate for varactor loss. Consequently, a wide tuning range of 63% is achieved with a gain variation of 1.0–9.3dBi.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128664052","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906882
S. Kumar Parui, T. Moyra, Santanu Das
In this paper, a new asymmetric type Defected ground Structure (DGS) is investigated. The proposed DGS unit comprising of three numbers of square shaped slots separated from each other by same distance connect a rectangular slot by thin meander slots underneath a microstrip line. In its frequency characteristics, a finite attenuation zero is observed near to its attenuation pole frequency. The investigated unit is modeled by a Causer Π-network consisting of a series resonant and a shunt resonant circuit. For a given dimension of the DGS, the equivalent LC parameters are extracted. The investigated DGS exhibits a sharp and deep bandstop filtering characteristics. The size of the DGS is very compact as the overall cutout area is 0.3 λg X 0.18 λg
本文研究了一种新型的非对称型缺陷地基结构。所提出的DGS单元由三个数的正方形槽组成，它们以相同的距离彼此分开，通过微带线下面的细弯曲槽连接一个矩形槽。在其频率特性中，在其衰减极点频率附近观察到一个有限衰减零。所研究的单元由一个串联谐振电路和一个并联谐振电路组成的肇因器Π-network建模。对于给定的DGS尺寸，提取等效的LC参数。所研究的DGS具有锐利的深带阻滤波特性。DGS的尺寸非常紧凑，整体切割面积为0.3 λg X 0.18 λg
{"title":"A new Defected ground Structure with bandstop filter characteristics","authors":"S. Kumar Parui, T. Moyra, Santanu Das","doi":"10.1109/IWAT.2009.4906882","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906882","url":null,"abstract":"In this paper, a new asymmetric type Defected ground Structure (DGS) is investigated. The proposed DGS unit comprising of three numbers of square shaped slots separated from each other by same distance connect a rectangular slot by thin meander slots underneath a microstrip line. In its frequency characteristics, a finite attenuation zero is observed near to its attenuation pole frequency. The investigated unit is modeled by a Causer Π-network consisting of a series resonant and a shunt resonant circuit. For a given dimension of the DGS, the equivalent LC parameters are extracted. The investigated DGS exhibits a sharp and deep bandstop filtering characteristics. The size of the DGS is very compact as the overall cutout area is 0.3 λg X 0.18 λg","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129826946","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906943
S. Kahng, J. Ju
Previously, we suggested the unprecedented design of a very compact UWB bandpass filter, which is based on the 1-cell microstrip Composite Right- and Left-Handed Transmission-line(CRLH-TL)[1]. Though the design result turned out satisfactory in terms of Bandwidth, Insertion Loss, Return Loss, Group Delay variation and so on, it had a narrow stopband beyond the upper passband edge. Therefore, we present the improved design to widen the stopband from ‘10.6 GHz∼12.6 GHz’ to ‘10.6 GHz∼14.6 GHz’ by modifying the original structure to create additional nulls(or poles), and the resultant structure is still as small as ‘guided wavelength( λg )/9.4’.
{"title":"Improving the stopband of the UWB bandpass filter with a novel compact 1-cell CRLHTL geometry with additional nulls","authors":"S. Kahng, J. Ju","doi":"10.1109/IWAT.2009.4906943","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906943","url":null,"abstract":"Previously, we suggested the unprecedented design of a very compact UWB bandpass filter, which is based on the 1-cell microstrip Composite Right- and Left-Handed Transmission-line(CRLH-TL)[1]. Though the design result turned out satisfactory in terms of Bandwidth, Insertion Loss, Return Loss, Group Delay variation and so on, it had a narrow stopband beyond the upper passband edge. Therefore, we present the improved design to widen the stopband from ‘10.6 GHz∼12.6 GHz’ to ‘10.6 GHz∼14.6 GHz’ by modifying the original structure to create additional nulls(or poles), and the resultant structure is still as small as ‘guided wavelength( λg )/9.4’.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125384261","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906950
L. Zhang, Y. Lee, Y. Hao, C. Parini
An application of the high gain woodpile Electromagnetic Bandgap (EBG) antenna for millimeter wave imaging at 95 GHz is presented. The EBG antenna has its advantages over other conventional millimeter wave antennas due to its low profile and costs. The antenna system evaluation and its feasibility study in millimeter wave imaging are demonstrated via numerical simulation and measurements.
{"title":"Woodpile EBG structure for millimeter wave imaging enhancement","authors":"L. Zhang, Y. Lee, Y. Hao, C. Parini","doi":"10.1109/IWAT.2009.4906950","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906950","url":null,"abstract":"An application of the high gain woodpile Electromagnetic Bandgap (EBG) antenna for millimeter wave imaging at 95 GHz is presented. The EBG antenna has its advantages over other conventional millimeter wave antennas due to its low profile and costs. The antenna system evaluation and its feasibility study in millimeter wave imaging are demonstrated via numerical simulation and measurements.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121373698","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906874
H. Abutarboush, H. Al-Raweshidy, R. Nilavalan
Small size wideband microstrip patch antenna with slot in ground plane and stacked patch fed through microstrip line is presented. By inserting slot on ground plane and stacked patch supported by wall, the bandwidth can improve up to 25% without significant change in the frequency. The bandwidth before adding the slot and the stacked patch was 3.72%, whereas after adding the slot and the stacked patch the bandwidth increased up to 25% ranging from 2.45 to 3.3 GHz. The radiation pattern has acceptable response at both E-plane and H-plane. The ground plane size is 30 mm by 90 mm, the antenna designed is based on Roger RT/duroid 5880 with dielectric constant 2.2.
{"title":"Bandwidth enhancement for microstrip patch antenna using stacked patch and slot","authors":"H. Abutarboush, H. Al-Raweshidy, R. Nilavalan","doi":"10.1109/IWAT.2009.4906874","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906874","url":null,"abstract":"Small size wideband microstrip patch antenna with slot in ground plane and stacked patch fed through microstrip line is presented. By inserting slot on ground plane and stacked patch supported by wall, the bandwidth can improve up to 25% without significant change in the frequency. The bandwidth before adding the slot and the stacked patch was 3.72%, whereas after adding the slot and the stacked patch the bandwidth increased up to 25% ranging from 2.45 to 3.3 GHz. The radiation pattern has acceptable response at both E-plane and H-plane. The ground plane size is 30 mm by 90 mm, the antenna designed is based on Roger RT/duroid 5880 with dielectric constant 2.2.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116431749","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906918
M. Rahim, H. Majid, T. Masri
The scope of this project was to design and simulate left-handed metamaterial structure incorporated with a single microstrip patch antenna at 2.7 GHz. The combination of the modified square rectangular split ring (SRR) and the capacitance loaded strip (CLS) was used to obtain the negative value of permeability, μ and the negative permittivity, ε. From the simulation and fabrication done, the gain of the antenna has been increased up to 4 dB. This had proven that the LH MTM can enhance the gain of the antenna.
{"title":"Microstrip antenna incorporated with left-handed metamaterial at 2.7 GHz","authors":"M. Rahim, H. Majid, T. Masri","doi":"10.1109/IWAT.2009.4906918","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906918","url":null,"abstract":"The scope of this project was to design and simulate left-handed metamaterial structure incorporated with a single microstrip patch antenna at 2.7 GHz. The combination of the modified square rectangular split ring (SRR) and the capacitance loaded strip (CLS) was used to obtain the negative value of permeability, μ and the negative permittivity, ε. From the simulation and fabrication done, the gain of the antenna has been increased up to 4 dB. This had proven that the LH MTM can enhance the gain of the antenna.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115838289","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906866
Vanja Plicanic Samuelsson, B. K. Lau, A. Derneryd, Z. Ying
This paper presents an evaluation of single input single output (SISO), single input multiple output (SIMO) and multiple input multiple output (MIMO) channel capacities for a dual antenna prototype in proximity of a user. The dual antenna prototype mimics today's small mobile phone design in size and in comprising internal, compact, multi-band antennas. Four different user cases are evaluated by measuring the antenna radiation performance for each of the different interactions between a phantom user and the antenna. Measurements of a single antenna prototype with user are also performed for comparisons between the SISO case and the SIMO/MIMO cases. Depending on the user interaction case, the MIMO capacity of the prototype is between 40–90% at 850 MHz and 60–80% at 2100 MHz higher than the SISO performance of the single antenna prototype or the best antenna on the dual antenna prototype.
{"title":"Channel capacity performance of multi-band dual antenna in proximity of a user","authors":"Vanja Plicanic Samuelsson, B. K. Lau, A. Derneryd, Z. Ying","doi":"10.1109/IWAT.2009.4906866","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906866","url":null,"abstract":"This paper presents an evaluation of single input single output (SISO), single input multiple output (SIMO) and multiple input multiple output (MIMO) channel capacities for a dual antenna prototype in proximity of a user. The dual antenna prototype mimics today's small mobile phone design in size and in comprising internal, compact, multi-band antennas. Four different user cases are evaluated by measuring the antenna radiation performance for each of the different interactions between a phantom user and the antenna. Measurements of a single antenna prototype with user are also performed for comparisons between the SISO case and the SIMO/MIMO cases. Depending on the user interaction case, the MIMO capacity of the prototype is between 40–90% at 850 MHz and 60–80% at 2100 MHz higher than the SISO performance of the single antenna prototype or the best antenna on the dual antenna prototype.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126248881","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906915
Angel Oses, J. Iriarte, I. Ederra, R. Gonzalo, P. de Maagt
EBG superstrate based antenna designs can find its applications in Geosynchonous Satellite Navigation (GSN) System Antennas, since they allow to reduce the number of radiating elements while keeping the required high directivity and circular polarization. Their use will considerably simplify the feeding network and simultaneously reduce the antenna mass and volume. A dual layer EBG superstrate which can be easily tuned to the desired frequencies is presented in this paper. The design has been optimized to comply with the navigation antenna requirements of Wide Area Augmentation System (WAAS) application in L1 and L2 bands.
{"title":"Multiband EBG navigation antenna","authors":"Angel Oses, J. Iriarte, I. Ederra, R. Gonzalo, P. de Maagt","doi":"10.1109/IWAT.2009.4906915","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906915","url":null,"abstract":"EBG superstrate based antenna designs can find its applications in Geosynchonous Satellite Navigation (GSN) System Antennas, since they allow to reduce the number of radiating elements while keeping the required high directivity and circular polarization. Their use will considerably simplify the feeding network and simultaneously reduce the antenna mass and volume. A dual layer EBG superstrate which can be easily tuned to the desired frequencies is presented in this paper. The design has been optimized to comply with the navigation antenna requirements of Wide Area Augmentation System (WAAS) application in L1 and L2 bands.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125725199","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906897
H. Abutarboush, H. Al-Raweshidy, R. Nilavalan
A design strategy using Photonic Band Gap (PBG) structure on ground plane to achieve wider bandwidth for patch antenna is presented. It is found that, the impedance bandwidth has improved from 3.72% to 31.9 % at centre frequency 9 GHz after adding PBG on the ground plane. The antenna has multi band operations at 5, 6 and 9 GHz. E-Plane and H-plane radiation patter is satisfied within this bands.
{"title":"Bandwidth enhancement for small patch antenna using PBG structure for different wireless applications","authors":"H. Abutarboush, H. Al-Raweshidy, R. Nilavalan","doi":"10.1109/IWAT.2009.4906897","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906897","url":null,"abstract":"A design strategy using Photonic Band Gap (PBG) structure on ground plane to achieve wider bandwidth for patch antenna is presented. It is found that, the impedance bandwidth has improved from 3.72% to 31.9 % at centre frequency 9 GHz after adding PBG on the ground plane. The antenna has multi band operations at 5, 6 and 9 GHz. E-Plane and H-plane radiation patter is satisfied within this bands.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132233326","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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