Pub Date : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657404
Yu Lang, S. Qu
In this paper, a dielectric-loaded H-plane horn antenna implemented by a substrate integrated waveguide (SIW) was designed. The SIW horn antenna was fabricated in a single low-temperature co-fired ceramic (LTCC) substrate for easy fabrication and low cost, and a CPW to SIW transition was used to feed the horn. The dielectric slab loaded at the aperture of the horn have been utilized to optimize the bandwidth, narrow the beamwidth of radiation patterns in the H-plane and E-plane, and enhance the gain of the horn antenna. The simulation results show that over the operating bandwidth of 50GHz-57GHz, reflection coefficients of the antenna is less than -10dB and the gain is from 7.4dBi to 11.6dBi.
{"title":"A dielectric loaded H-plane horn for millimeter waves based on LTCC technology","authors":"Yu Lang, S. Qu","doi":"10.1109/CSQRWC.2013.6657404","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657404","url":null,"abstract":"In this paper, a dielectric-loaded H-plane horn antenna implemented by a substrate integrated waveguide (SIW) was designed. The SIW horn antenna was fabricated in a single low-temperature co-fired ceramic (LTCC) substrate for easy fabrication and low cost, and a CPW to SIW transition was used to feed the horn. The dielectric slab loaded at the aperture of the horn have been utilized to optimize the bandwidth, narrow the beamwidth of radiation patterns in the H-plane and E-plane, and enhance the gain of the horn antenna. The simulation results show that over the operating bandwidth of 50GHz-57GHz, reflection coefficients of the antenna is less than -10dB and the gain is from 7.4dBi to 11.6dBi.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"27 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129483888","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657350
Liu Kai, Gaofeng Guo, Li En, Yuan-ci Gao
In this paper, a wide-band power divider utilized stripline to slotline transition is presented. The power divider uses two different transmission lines- stripline and slotline. The slotline was etched on the ground plane at an angle of 90 degree with the stripline. An improved open/ short end structures were employed to achieve the wide-band performance. The simulated results show that the proposed power divider exhibits a return loss better than 12dB, insertion loss less than 1.0dB, isolation loss better than 7dB, phase imbalance about 180°± 0.2° and amplitude imbalance about ±0.03dB across the band from 2-8GHz. The proposed device has a compact size with a dimension of 30mm×35mm.
{"title":"A novel compact wide-band out-of-phase power divider based on stripline-slotline transition","authors":"Liu Kai, Gaofeng Guo, Li En, Yuan-ci Gao","doi":"10.1109/CSQRWC.2013.6657350","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657350","url":null,"abstract":"In this paper, a wide-band power divider utilized stripline to slotline transition is presented. The power divider uses two different transmission lines- stripline and slotline. The slotline was etched on the ground plane at an angle of 90 degree with the stripline. An improved open/ short end structures were employed to achieve the wide-band performance. The simulated results show that the proposed power divider exhibits a return loss better than 12dB, insertion loss less than 1.0dB, isolation loss better than 7dB, phase imbalance about 180°± 0.2° and amplitude imbalance about ±0.03dB across the band from 2-8GHz. The proposed device has a compact size with a dimension of 30mm×35mm.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122853869","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657421
Li Kai, Wei Guang-hui, Pan Xiao-dong, Zhang Long, Li Xin-feng
To analysis field strength and protect sensitive circuits in shielding cavity, Field enhancement effect has been researched in frequency domain with shielding effectiveness by using electromagnetic simulation software CST. Experimental system has built with a vector network analyzer, power amplifier, GTEM cell and pulsed electromagnetic field measuring probe to verify the simulation results. Theoretical analysis about the formation mechanism of the field enhancement effect is studied, influence of shape of aperture, electromagnetic wave polarization direction, absorbing material loaded on field enhancement effect are also researched.
{"title":"Study of field enhancement effect of a metallic shielding cavity with an aperture","authors":"Li Kai, Wei Guang-hui, Pan Xiao-dong, Zhang Long, Li Xin-feng","doi":"10.1109/CSQRWC.2013.6657421","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657421","url":null,"abstract":"To analysis field strength and protect sensitive circuits in shielding cavity, Field enhancement effect has been researched in frequency domain with shielding effectiveness by using electromagnetic simulation software CST. Experimental system has built with a vector network analyzer, power amplifier, GTEM cell and pulsed electromagnetic field measuring probe to verify the simulation results. Theoretical analysis about the formation mechanism of the field enhancement effect is studied, influence of shape of aperture, electromagnetic wave polarization direction, absorbing material loaded on field enhancement effect are also researched.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121931820","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657422
Xiaotian Qiu, Yongxiang Liu, Xiang Li
Discrimination of the decoys and warhead is one of the key problems in the ballistic missile defense system. As the ground-based radars hardly observe the decoy release, it is of profound significance to investigate the ballistic trajectory inverse technology of space target. In this paper, a method of inverse technology based on two-object movement theory of midcourse ballistic trajectory is presented firstly. An Extended Kalman filter algorithm is then proposed to preprocess the data of the ballistic trajectory. The new algorithm shows a better performance comparing to the traditional least squares filter algorithm. Finally, some simulations are carried out to analyze the estimation error, considering some factors such as radar measurement error and radar parameters.
{"title":"A method of trajectory inverse estimation for space targets and performance analysis","authors":"Xiaotian Qiu, Yongxiang Liu, Xiang Li","doi":"10.1109/CSQRWC.2013.6657422","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657422","url":null,"abstract":"Discrimination of the decoys and warhead is one of the key problems in the ballistic missile defense system. As the ground-based radars hardly observe the decoy release, it is of profound significance to investigate the ballistic trajectory inverse technology of space target. In this paper, a method of inverse technology based on two-object movement theory of midcourse ballistic trajectory is presented firstly. An Extended Kalman filter algorithm is then proposed to preprocess the data of the ballistic trajectory. The new algorithm shows a better performance comparing to the traditional least squares filter algorithm. Finally, some simulations are carried out to analyze the estimation error, considering some factors such as radar measurement error and radar parameters.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115355757","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657408
W. Han, J. Ouyang, Zhiwei Guo, Yan Li, Feng Yang
A novel polarization reconfigurable fabry-perot antenna with high gain and simple feed is proposed in this paper. The proposed structure consists of a ground plane and a partially reflective surface (PRS). A microstrip patch antenna with switchable slots is embedded into the cavity to act as the primary feed. The proposed antenna can radiate with either right hand circular polarization (RHCP) or left hand circular polarization (LHCP) by controlling the status of the switches. The full-wave simulated results exhibit 21 dBi peak gain corresponding to 70% aperture efficiency for both polarization status. Good axial-ratio and impedance matching is obtained at the center operating frequency.
{"title":"A single-feed high-gain fabry-perot antenna with reconfigurable polarization capability","authors":"W. Han, J. Ouyang, Zhiwei Guo, Yan Li, Feng Yang","doi":"10.1109/CSQRWC.2013.6657408","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657408","url":null,"abstract":"A novel polarization reconfigurable fabry-perot antenna with high gain and simple feed is proposed in this paper. The proposed structure consists of a ground plane and a partially reflective surface (PRS). A microstrip patch antenna with switchable slots is embedded into the cavity to act as the primary feed. The proposed antenna can radiate with either right hand circular polarization (RHCP) or left hand circular polarization (LHCP) by controlling the status of the switches. The full-wave simulated results exhibit 21 dBi peak gain corresponding to 70% aperture efficiency for both polarization status. Good axial-ratio and impedance matching is obtained at the center operating frequency.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127255089","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657367
Hung-Wen Chang, Chang-Chien Chin-Min
The method of connected local fields, CLF [1,2] is becoming a viable numerical technique for obtaining solutions of the Helmholtz equation in complex media. In CLF the EM fields are expressed as collection of overlapping local fields called patches. In a 2D homogeneous medium we show that the local field in a given FD cell can be approximated by truncated Fourier-Bessel series (FBS) and the FBS coefficients are related to the control points on the surface of the given patch. As part of the effort for extending CLF capability to modeling EM waves in inhomogeneous media, we report in this paper, two numerical techniques for obtaining 2D CLF-based compact frequency-domain stencils for EM fields and waves near a dielectric interface.
{"title":"2D compact frequency-domain stencils for dielectric media with an interface","authors":"Hung-Wen Chang, Chang-Chien Chin-Min","doi":"10.1109/CSQRWC.2013.6657367","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657367","url":null,"abstract":"The method of connected local fields, CLF [1,2] is becoming a viable numerical technique for obtaining solutions of the Helmholtz equation in complex media. In CLF the EM fields are expressed as collection of overlapping local fields called patches. In a 2D homogeneous medium we show that the local field in a given FD cell can be approximated by truncated Fourier-Bessel series (FBS) and the FBS coefficients are related to the control points on the surface of the given patch. As part of the effort for extending CLF capability to modeling EM waves in inhomogeneous media, we report in this paper, two numerical techniques for obtaining 2D CLF-based compact frequency-domain stencils for EM fields and waves near a dielectric interface.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123998285","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657428
Hui Guo, W. Fang, Xin Wen, F. Nian
In recent years, how to effectively complement preferable details to an image according to its local information is one of the research focuses in the field of image enhancement. For an image badly lack of local details, the key of image enhancement is to reconstruct the unknown original details in terms of the small amount of known information. To completely or approximately reconstruct an unknown signal by a small number of its known elements is a matrix completion problem in the sparse theory. This paper proposes an image enhancement algorithm based on matrix completion, which implements effective complements of local details to the local blurred image by solving the nuclear norm minimization problem with the method of singular value shrinkage iteration, and achieves image enhancement with fine subjective qualities for human vision.
{"title":"Image enhancement based on matrix completion","authors":"Hui Guo, W. Fang, Xin Wen, F. Nian","doi":"10.1109/CSQRWC.2013.6657428","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657428","url":null,"abstract":"In recent years, how to effectively complement preferable details to an image according to its local information is one of the research focuses in the field of image enhancement. For an image badly lack of local details, the key of image enhancement is to reconstruct the unknown original details in terms of the small amount of known information. To completely or approximately reconstruct an unknown signal by a small number of its known elements is a matrix completion problem in the sparse theory. This paper proposes an image enhancement algorithm based on matrix completion, which implements effective complements of local details to the local blurred image by solving the nuclear norm minimization problem with the method of singular value shrinkage iteration, and achieves image enhancement with fine subjective qualities for human vision.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124821830","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657437
Tso-Cho Chen, Kuan-Liang Lin
An adaptive weighted multibit-flipping (AWMBF) decoding algorithm which flips multiple bits in each iteration is proposed for low-density parity-check (LDPC) codes. The multibit-flipping criterion is devised based on the least reliable positions in which reliability measure threshold is dynamically adapted during the decoding process. The proposed decoder converges faster and provides better performances than the conventional weighted bit-flipping and multibit-flipping decoders. Simulation results demonstrate that the proposed algorithm achieves a good tradeoff between performance and complexity.
{"title":"An adaptive weighted multibit-flipping algorithm for decoding LDPC codes","authors":"Tso-Cho Chen, Kuan-Liang Lin","doi":"10.1109/CSQRWC.2013.6657437","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657437","url":null,"abstract":"An adaptive weighted multibit-flipping (AWMBF) decoding algorithm which flips multiple bits in each iteration is proposed for low-density parity-check (LDPC) codes. The multibit-flipping criterion is devised based on the least reliable positions in which reliability measure threshold is dynamically adapted during the decoding process. The proposed decoder converges faster and provides better performances than the conventional weighted bit-flipping and multibit-flipping decoders. Simulation results demonstrate that the proposed algorithm achieves a good tradeoff between performance and complexity.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133273085","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657351
C. Jin, Jian‐Xin Chen, H. Chu, Z. Bao
A novel X-band substrate integrated waveguide (SIW) differential bandpass filter (BPF) is proposed in this paper. The major design concept is by making an aperture etched in the middle common ground of vertically stacked cavities so that the common-mode signals can be suppressed. Oversized SIW cavities are implemented to achieve a finite transmission zero by utilizing the interaction between the fundamental TE101 mode and higher order mode of TE301 to improve the attenuation out of the passband. Based on the simulated results, the insertion losses of our proposed differential BPF is extremely low within the passband under differential-mode signals, as well as the common-mode rejection levels are better than 30dB across a very broad band.
{"title":"A novel X-band differential bandpass filter based on oversized substrate integrated waveguide cavity","authors":"C. Jin, Jian‐Xin Chen, H. Chu, Z. Bao","doi":"10.1109/CSQRWC.2013.6657351","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657351","url":null,"abstract":"A novel X-band substrate integrated waveguide (SIW) differential bandpass filter (BPF) is proposed in this paper. The major design concept is by making an aperture etched in the middle common ground of vertically stacked cavities so that the common-mode signals can be suppressed. Oversized SIW cavities are implemented to achieve a finite transmission zero by utilizing the interaction between the fundamental TE101 mode and higher order mode of TE301 to improve the attenuation out of the passband. Based on the simulated results, the insertion losses of our proposed differential BPF is extremely low within the passband under differential-mode signals, as well as the common-mode rejection levels are better than 30dB across a very broad band.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"350 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131446914","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}
A new family of hierarchical divergence-conforming vector functions based on curved tetrahedral volumetric cell is proposed for method of moment (MOM) solutions of volume integral equations in this paper. The higher order method of volume electric-field integral equation (VEFIE) for dielectric objects electromagnetic scattering problems. The expressions of the new hierarchical divergence-conforming vector basis functions up to the second order are presented in this paper. Numerical results employed higher order basis functions are presented to show the number of unknowns can be significantly reduced. And the presented approach is validated by the accurate results for scattering by the layered objects employed the same mesh sizes.
{"title":"Higher-order MOM of volume integral equation using hierarchical vector basis functions","authors":"Qiangming Cai, Yanwen Zhao, Yu-teng Zheng, Longtao Zhou, Miao-miao Jia, Yi Ren","doi":"10.1109/CSQRWC.2013.6657380","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657380","url":null,"abstract":"A new family of hierarchical divergence-conforming vector functions based on curved tetrahedral volumetric cell is proposed for method of moment (MOM) solutions of volume integral equations in this paper. The higher order method of volume electric-field integral equation (VEFIE) for dielectric objects electromagnetic scattering problems. The expressions of the new hierarchical divergence-conforming vector basis functions up to the second order are presented in this paper. Numerical results employed higher order basis functions are presented to show the number of unknowns can be significantly reduced. And the presented approach is validated by the accurate results for scattering by the layered objects employed the same mesh sizes.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132277284","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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