Pub Date : 2018-08-01DOI: 10.1109/apcap.2018.8538286
A. Bunea, D. Neculoiu, A. Avram, M. Iovea
The paper proposes a 3x1 folded slot antenna with a coplanar waveguide feed, processed on a dielectric membrane fabricated through the Deep Reactive Ion Etching of a silicon substrate. The antenna is placed on a metallized silicon chip ensuring good mechanical stability and high gain. The resulting structure has an input matching bandwidth between 76 – 100 GHz, with a gain of 10.5 dBi at 94 GHz. The size of the fabricated chip is 6.7$times$7.2$times$1.3 mm$^{3}$.
{"title":"Wideband Micromachined Antenna for W-band Applications","authors":"A. Bunea, D. Neculoiu, A. Avram, M. Iovea","doi":"10.1109/apcap.2018.8538286","DOIUrl":"https://doi.org/10.1109/apcap.2018.8538286","url":null,"abstract":"The paper proposes a 3x1 folded slot antenna with a coplanar waveguide feed, processed on a dielectric membrane fabricated through the Deep Reactive Ion Etching of a silicon substrate. The antenna is placed on a metallized silicon chip ensuring good mechanical stability and high gain. The resulting structure has an input matching bandwidth between 76 – 100 GHz, with a gain of 10.5 dBi at 94 GHz. The size of the fabricated chip is 6.7$times$7.2$times$1.3 mm$^{3}$.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127445187","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538067
Shiwei Xiao, Shiwen Yang, Hongfei Bao, S. Qu, Yikai Chen
The investigation of a low-profile wideband and two-dimensional wide-scanning tightly coupled dipole array (TCDA) is presented. The array is designed without wide angle impedance matching (WAIM) layer for the sake of low-profile and a compact wideband integrated balun is implemented to feed the array aperture. Parasitic rectangular strips etched on each side of the dipole are utilized to improve the radiation performances in the H-plane, which is orthogonal to the current excited direction that is tightly coupled. An $8 times8$ planar prototype array was fabricated and measured. The array is able to achieve 4:1 impedance bandwidth with active VSWR $lt/pgtlt3.1$ in the E-plane while scanning up to ±60° and active VSWR $lt/pgtlt3.0$ in the H-plane while scanning up to ±45°, respectively. Meanwhile, the measured cross polarization level of the prototype is less than −20 dB along principal planes scanning.
{"title":"Investigation of a Low-Profile Ultra-Wideband Tightly Coupled Dipole Array","authors":"Shiwei Xiao, Shiwen Yang, Hongfei Bao, S. Qu, Yikai Chen","doi":"10.1109/APCAP.2018.8538067","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538067","url":null,"abstract":"The investigation of a low-profile wideband and two-dimensional wide-scanning tightly coupled dipole array (TCDA) is presented. The array is designed without wide angle impedance matching (WAIM) layer for the sake of low-profile and a compact wideband integrated balun is implemented to feed the array aperture. Parasitic rectangular strips etched on each side of the dipole are utilized to improve the radiation performances in the H-plane, which is orthogonal to the current excited direction that is tightly coupled. An $8 times8$ planar prototype array was fabricated and measured. The array is able to achieve 4:1 impedance bandwidth with active VSWR $lt/pgtlt3.1$ in the E-plane while scanning up to ±60° and active VSWR $lt/pgtlt3.0$ in the H-plane while scanning up to ±45°, respectively. Meanwhile, the measured cross polarization level of the prototype is less than −20 dB along principal planes scanning.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123245188","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538077
P. Du, W. Fu
The enhanced gap source model and the finite-width feed model are two accurate feed models considering the width of the feed gap in the antenna modeling. These two models are easy to implement. Comparing with the former model, finer meshes are required in the latter one, which leads to more unknowns. These two models are compared to study how to choose the feed model.
{"title":"Comparison of Two Feed Models Considering Gap Width for Antennas","authors":"P. Du, W. Fu","doi":"10.1109/APCAP.2018.8538077","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538077","url":null,"abstract":"The enhanced gap source model and the finite-width feed model are two accurate feed models considering the width of the feed gap in the antenna modeling. These two models are easy to implement. Comparing with the former model, finer meshes are required in the latter one, which leads to more unknowns. These two models are compared to study how to choose the feed model.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123420422","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538139
Quan Wang, Cheng Yang, M. Jin
An X-band metal-only reflectarray, which consists of three parallel metallic dipoles loaded by split square loop units, is investigated in this paper. Enough phasing range and nearlylinearly reflected phase curve benefit from the outer split square loop, which adds a resonantstructure and controls the reflected characteristic. The reflectarray is designed and simulated, which covers an aperture of $200 times200$ mm $^{2}$. The proposed reflectarray has a lower cross-polarization, and its simulated gain, side-lobe levels, and cross polarization levels are 24.7 dB, -15.8 dB, -35dB at the center 10 GHz respectively. Its 1-dB gain bandwidth is about 20% at X-band.
本文研究了一种由三个平行金属偶极子组成的x波段纯金属反射射线，该反射射线由分割方形环单元加载。外分方形环增加了谐振结构，控制了反射特性，从而获得了足够的相位范围和近线性反射相位曲线。设计并仿真了孔径为$200 times $200 $ mm $^{2}$的反射阵列。所提出的反射光具有较低的交叉极化，其模拟增益、副瓣电平和交叉极化电平在中心10ghz处分别为24.7 dB、-15.8 dB和-35dB。其1db增益带宽在x波段约为20%。
{"title":"An X-band Broadband Metal-only Reflectarray Using Three Parallel Dipoles Loaded by Split Loop","authors":"Quan Wang, Cheng Yang, M. Jin","doi":"10.1109/APCAP.2018.8538139","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538139","url":null,"abstract":"An X-band metal-only reflectarray, which consists of three parallel metallic dipoles loaded by split square loop units, is investigated in this paper. Enough phasing range and nearlylinearly reflected phase curve benefit from the outer split square loop, which adds a resonantstructure and controls the reflected characteristic. The reflectarray is designed and simulated, which covers an aperture of $200 times200$ mm $^{2}$. The proposed reflectarray has a lower cross-polarization, and its simulated gain, side-lobe levels, and cross polarization levels are 24.7 dB, -15.8 dB, -35dB at the center 10 GHz respectively. Its 1-dB gain bandwidth is about 20% at X-band.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125295915","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538310
Yun Hu, W. Hong
In this paper, a novel hybrid analog-digital multibeam antenna array is proposed for massive multiple-input multiple-output (MIMO) application. Passive multibeam antennas fed by analog beamforming networks are used for handling multiple beams in the elevation plane simultaneous. The radiation beam steers horizontally by arranging the passive multibeam antennas in the azimuth plane and shifting the signal phases in a digital beamformer. Because of the implementing of a passive beamformer network, a large number of antenna elements are employed by less channels. The digital beamforming (DBF) processing is simplified the power consumption can be decreased. To verify the concept, a $4x8$ modified Butler matrix is adopted and implemented in the substrate integrated waveguide (SIW) form with the 13.45% bandwidth at 26 GHz. An 8-beam antenna consists of two tapered slot antenna (TSA) arrays fed by the Butler matrixes which inclines ±5.5 orespectively to achieve high beam crossing levels and enlarge the scan coverage. Then, a 128-channel hybrid analog-digital multibeam receiver array module is fabricated by arranging 168-beam antennas. The measured results show that the scan coverage larger than $pm 45 circ $ in both azimuth and elevation planes. The performance of the proposed architecture is excellent and it presents an excellent candidate for 5G communication systems.
{"title":"A Novel Hybrid Analog-Digital Multibeam Antenna Array for Massive MIMO Applications","authors":"Yun Hu, W. Hong","doi":"10.1109/APCAP.2018.8538310","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538310","url":null,"abstract":"In this paper, a novel hybrid analog-digital multibeam antenna array is proposed for massive multiple-input multiple-output (MIMO) application. Passive multibeam antennas fed by analog beamforming networks are used for handling multiple beams in the elevation plane simultaneous. The radiation beam steers horizontally by arranging the passive multibeam antennas in the azimuth plane and shifting the signal phases in a digital beamformer. Because of the implementing of a passive beamformer network, a large number of antenna elements are employed by less channels. The digital beamforming (DBF) processing is simplified the power consumption can be decreased. To verify the concept, a $4x8$ modified Butler matrix is adopted and implemented in the substrate integrated waveguide (SIW) form with the 13.45% bandwidth at 26 GHz. An 8-beam antenna consists of two tapered slot antenna (TSA) arrays fed by the Butler matrixes which inclines ±5.5 orespectively to achieve high beam crossing levels and enlarge the scan coverage. Then, a 128-channel hybrid analog-digital multibeam receiver array module is fabricated by arranging 168-beam antennas. The measured results show that the scan coverage larger than $pm 45 circ $ in both azimuth and elevation planes. The performance of the proposed architecture is excellent and it presents an excellent candidate for 5G communication systems.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116400423","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538214
Xiong Liu, Dongying Li, Wenxian Yu
In this paper, a Simultaneous Localization and Mapping (SLAM) paradigm with an adaptive genetic particle filter is migrated to the detection platform with microwave radar sensors. A closed-loop feedback scheme is implemented to obtain the position of radar platform as well as to construct a scattering map for surrounding object with either deterministic or stochastic echo-wave response. The simulation results indicate that the algorithm works accurately in terms of both map construction and platform positioning.
{"title":"A Radar-Based Simultaneous Localization and Mapping Paradigm for Scattering Map Modeling","authors":"Xiong Liu, Dongying Li, Wenxian Yu","doi":"10.1109/APCAP.2018.8538214","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538214","url":null,"abstract":"In this paper, a Simultaneous Localization and Mapping (SLAM) paradigm with an adaptive genetic particle filter is migrated to the detection platform with microwave radar sensors. A closed-loop feedback scheme is implemented to obtain the position of radar platform as well as to construct a scattering map for surrounding object with either deterministic or stochastic echo-wave response. The simulation results indicate that the algorithm works accurately in terms of both map construction and platform positioning.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114567586","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538227
Fang Ye, Ruo-Lin Wang, Qian Sun
In comparison to the binary LDPC codes, the nonbinary low-density parity-check (NB-LDPC) codes have the advantage of solving burst errors. In order to improve the accuracy of the decoding results, an improved extended min-sum (EMS) algorithm is proposed in this paper. By adopting the feedback idea of joint iterative detection algorithm and introducing the reliability and stability parameters, the new algorithm can mitigate the influence of Log-likelihood ratio (LLR) oscillation on the decoding result and adjust the update information of the check node properly, thereby improving the decoding accuracy. This method can effectively restrain the LLR oscillation and speed up the convergence rate, thus the final decision result can be amended. Simulation results show that, the proposed improved EMS decoding algorithm heightens the bit error rate performance and reduces average number of iterations, meanwhile the additional computations are within acceptable range.
{"title":"Modified EMS Decoding Algorithm Combined with Feedback Theory","authors":"Fang Ye, Ruo-Lin Wang, Qian Sun","doi":"10.1109/APCAP.2018.8538227","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538227","url":null,"abstract":"In comparison to the binary LDPC codes, the nonbinary low-density parity-check (NB-LDPC) codes have the advantage of solving burst errors. In order to improve the accuracy of the decoding results, an improved extended min-sum (EMS) algorithm is proposed in this paper. By adopting the feedback idea of joint iterative detection algorithm and introducing the reliability and stability parameters, the new algorithm can mitigate the influence of Log-likelihood ratio (LLR) oscillation on the decoding result and adjust the update information of the check node properly, thereby improving the decoding accuracy. This method can effectively restrain the LLR oscillation and speed up the convergence rate, thus the final decision result can be amended. Simulation results show that, the proposed improved EMS decoding algorithm heightens the bit error rate performance and reduces average number of iterations, meanwhile the additional computations are within acceptable range.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121897263","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538158
N. M. Nadzir, M. Rahim, N. Samsuri, F. Zubir, O. Ayop, H. Majid
This paper proposes an improved UHF RFID tag using low cost materials such as transparency paper (polycarbonate) as the substrate and aluminum tape as the radiating element. The main contribution of this method is the reduced size of the UHF RFID tag compared to the readily available tags. The tag is developed by outlining a bowtie antenna with meandered lines. To test the effectiveness of the proposed method, CST simulations are carried out under various parameter changes such as the size, the shape of the bowtie, and the width of the meander line. The result shows up to 30% decrease in size compared to the readily available UHF RFID tags.
{"title":"UHF RFID Tag Using Polycarbonate Material","authors":"N. M. Nadzir, M. Rahim, N. Samsuri, F. Zubir, O. Ayop, H. Majid","doi":"10.1109/APCAP.2018.8538158","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538158","url":null,"abstract":"This paper proposes an improved UHF RFID tag using low cost materials such as transparency paper (polycarbonate) as the substrate and aluminum tape as the radiating element. The main contribution of this method is the reduced size of the UHF RFID tag compared to the readily available tags. The tag is developed by outlining a bowtie antenna with meandered lines. To test the effectiveness of the proposed method, CST simulations are carried out under various parameter changes such as the size, the shape of the bowtie, and the width of the meander line. The result shows up to 30% decrease in size compared to the readily available UHF RFID tags.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122165860","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538244
T. Haq, C. Ruan, Shahid Ullah, Ayesha Kosar
Resonant type metamaterial approach is used to design a reconfigurable UWB (ultra wide band) notch filter based on CSSRR (complementary symmetric split ring resonator). CSSRR is etched in ground plane in the vicinity of microstrip and this combination provides UWB dual notch filter of 3.58 GHz bandwidth due to epsilon negative (ENG) behaviour of CSSRR. Truncating the symmetry of CSSRR by conductor, designed filter can be tuned to single notch at 6.64 GHz with fractional bandwidth of 34.48 % and Qfactor 44.26. Numerical calculations are performed using high frequency structure simulator and experimentally verified using vector network analyzer AV3672. Frequency responses of simulated and measured results have satisfactory agreement.
{"title":"Reconfigurable Ultra Wide Band Notch Filter based on Complementary Metamaterial","authors":"T. Haq, C. Ruan, Shahid Ullah, Ayesha Kosar","doi":"10.1109/APCAP.2018.8538244","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538244","url":null,"abstract":"Resonant type metamaterial approach is used to design a reconfigurable UWB (ultra wide band) notch filter based on CSSRR (complementary symmetric split ring resonator). CSSRR is etched in ground plane in the vicinity of microstrip and this combination provides UWB dual notch filter of 3.58 GHz bandwidth due to epsilon negative (ENG) behaviour of CSSRR. Truncating the symmetry of CSSRR by conductor, designed filter can be tuned to single notch at 6.64 GHz with fractional bandwidth of 34.48 % and Qfactor 44.26. Numerical calculations are performed using high frequency structure simulator and experimentally verified using vector network analyzer AV3672. Frequency responses of simulated and measured results have satisfactory agreement.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129954613","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538146
N. Othman, N. Samsuri, M. Rahim, K. Kamardin
This paper evaluates the off-body propagation characteristic of flexible meandered bowtie antenna at 2.4 GHz. Propagation measurements have been carried out in anechoic chamber. The effect of human body on $S_{11}$, $S_{21}$ and received power are analysed. The results show that the received signal degrades by more than 20 dBm when the signal propagation is blocked by the body while the $S_{21}$ transmission is reduced for up to 25 dB.
{"title":"Transmission Characteristic of Meandered Bowtie Antenna at 2.4 GHz in Proximity to Human Body","authors":"N. Othman, N. Samsuri, M. Rahim, K. Kamardin","doi":"10.1109/APCAP.2018.8538146","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538146","url":null,"abstract":"This paper evaluates the off-body propagation characteristic of flexible meandered bowtie antenna at 2.4 GHz. Propagation measurements have been carried out in anechoic chamber. The effect of human body on $S_{11}$, $S_{21}$ and received power are analysed. The results show that the received signal degrades by more than 20 dBm when the signal propagation is blocked by the body while the $S_{21}$ transmission is reduced for up to 25 dB.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129364842","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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