Pub Date : 2015-12-01DOI: 10.1109/APMC.2015.7413420
Shuai Wang, Xiaosong Wang, Ping Wang, Yu Yang
A novel dual-band, thin and polarization-insensitive metamaterial absorber is proposed, it can realize the perfect absorptivity at 36GHz and 42.1GHz. The perfect absorber has three layers, lossy-FR4 in the middle with copper layers on both sides. The basic geometry of top octangle-shaped resonant copper layer is constructed by the overlapping of three disks. From the surface current distributions of the structure, we can find the strong resonance phenomena happened at 36GHz and 42.1GHz. For the top layer is symmetrical, the absorptivity of the structure almost not change with the polarization angle of the incident wave.
{"title":"Perfect dual-band metamaterial absorber based on octangle-shaped structure","authors":"Shuai Wang, Xiaosong Wang, Ping Wang, Yu Yang","doi":"10.1109/APMC.2015.7413420","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413420","url":null,"abstract":"A novel dual-band, thin and polarization-insensitive metamaterial absorber is proposed, it can realize the perfect absorptivity at 36GHz and 42.1GHz. The perfect absorber has three layers, lossy-FR4 in the middle with copper layers on both sides. The basic geometry of top octangle-shaped resonant copper layer is constructed by the overlapping of three disks. From the surface current distributions of the structure, we can find the strong resonance phenomena happened at 36GHz and 42.1GHz. For the top layer is symmetrical, the absorptivity of the structure almost not change with the polarization angle of the incident wave.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129799683","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 : 2015-12-01DOI: 10.1109/APMC.2015.7411623
Ying Wang, G. Hua, Jing Du
A broadband Magic-T using 3-dB coupler and 90° phase shifter is proposed in this paper. Microstrip/Slot technology has been employed in the design. Compared with the conventional magic-T, it can operate over an ultra-wideband. Results of simulation and measurement show that the relative bandwidth is 105 % with the VSWR less than 1.85, and the insertion loss less than 1.6 dB. The phase ripple is ±12°. The isolation is greater than 13dB across 2.5-8GHz.
{"title":"Design of ultra-wideband Magic-T using microstrip/slot coupler and phase shifter","authors":"Ying Wang, G. Hua, Jing Du","doi":"10.1109/APMC.2015.7411623","DOIUrl":"https://doi.org/10.1109/APMC.2015.7411623","url":null,"abstract":"A broadband Magic-T using 3-dB coupler and 90° phase shifter is proposed in this paper. Microstrip/Slot technology has been employed in the design. Compared with the conventional magic-T, it can operate over an ultra-wideband. Results of simulation and measurement show that the relative bandwidth is 105 % with the VSWR less than 1.85, and the insertion loss less than 1.6 dB. The phase ripple is ±12°. The isolation is greater than 13dB across 2.5-8GHz.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129892909","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413371
Yuhao Lu, Mingkang Li, Chang Chen, Lingyun Zhou
A unit based on substrate integrated waveguide (SIW) cavity with folded defected ground structure (FDGS) split-ring resonator (SRR) etched on is introduced. The coupling between the SIW cavity and FDGS leads to two resonant frequencies and one transmission zero. By adjusting the size and the position of the FDGS SRR, both resonant frequencies and transmission zero can be controlled. The flexibility of the unit is fully used to design a dual-band bandpass filter with compact size by simply cascading two units. The measured S-parameters agree well with the simulated ones.
{"title":"A dual-band bandpass filter with substrate integrated waveguide-to-folded defected ground structure split ring resonator unit","authors":"Yuhao Lu, Mingkang Li, Chang Chen, Lingyun Zhou","doi":"10.1109/APMC.2015.7413371","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413371","url":null,"abstract":"A unit based on substrate integrated waveguide (SIW) cavity with folded defected ground structure (FDGS) split-ring resonator (SRR) etched on is introduced. The coupling between the SIW cavity and FDGS leads to two resonant frequencies and one transmission zero. By adjusting the size and the position of the FDGS SRR, both resonant frequencies and transmission zero can be controlled. The flexibility of the unit is fully used to design a dual-band bandpass filter with compact size by simply cascading two units. The measured S-parameters agree well with the simulated ones.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130403184","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413476
J. Macháč, L. Jelínek
This paper reports on a 3D system of broad side coupled split ring resonators with randomly dispersed resonance frequencies. This dispersion is caused by the varied geometric and material parameters of the resonators. The resonance frequency band of the effective permeability of the metamaterial is significantly widened, the value of the real part of the permeability is reduced, or the band of negative permeability even disappears. The paper comments on the design of a lens aimed at improving the imaging properties of the MRI system. The proposed homogenization method is verified by measuring the scattering parameters of the metamaterial in a rectangular waveguide.
{"title":"A system of split ring resonators with randomly dispersed resonance frequencies","authors":"J. Macháč, L. Jelínek","doi":"10.1109/APMC.2015.7413476","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413476","url":null,"abstract":"This paper reports on a 3D system of broad side coupled split ring resonators with randomly dispersed resonance frequencies. This dispersion is caused by the varied geometric and material parameters of the resonators. The resonance frequency band of the effective permeability of the metamaterial is significantly widened, the value of the real part of the permeability is reduced, or the band of negative permeability even disappears. The paper comments on the design of a lens aimed at improving the imaging properties of the MRI system. The proposed homogenization method is verified by measuring the scattering parameters of the metamaterial in a rectangular waveguide.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130525078","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413143
Cheng Zhao, C. Fumeaux, C. Lim
Insertion loss is a crucial specification to judge the quality of a substrate integrated waveguide (SIW) band-pass filter. In this paper, six Chebyshev band-pass post filters in SIW technology are firstly designed with a lossless mode-matching code. The considered filters are designed with various orders for a center frequency of 10.5 GHz and a fractional bandwidth of 9.52%. These filters are then simulated with a full-wave electromagnetic solver in order to investigate the various contributions of ohmic and dielectric losses affecting the performance. In particular, the influence on the insertion loss of the variations of the metal cladding and vias conductivity, the dielectric loss tangent and the thickness of the substrate is quantitatively analyzed. For validation, one prototype filter is fabricated to compare the simulations to experimental results.
{"title":"Losses in substrate integrated waveguide band-pass post filters","authors":"Cheng Zhao, C. Fumeaux, C. Lim","doi":"10.1109/APMC.2015.7413143","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413143","url":null,"abstract":"Insertion loss is a crucial specification to judge the quality of a substrate integrated waveguide (SIW) band-pass filter. In this paper, six Chebyshev band-pass post filters in SIW technology are firstly designed with a lossless mode-matching code. The considered filters are designed with various orders for a center frequency of 10.5 GHz and a fractional bandwidth of 9.52%. These filters are then simulated with a full-wave electromagnetic solver in order to investigate the various contributions of ohmic and dielectric losses affecting the performance. In particular, the influence on the insertion loss of the variations of the metal cladding and vias conductivity, the dielectric loss tangent and the thickness of the substrate is quantitatively analyzed. For validation, one prototype filter is fabricated to compare the simulations to experimental results.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129036776","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 : 2015-12-01DOI: 10.1109/APMC.2015.7412942
Bo Han, Ruxia Yue, Jun Li, Xiaofeng Shi, Daimu Wang
One-π physics-based equivalent-circuit models and behavioral macro-model for on-chip spiral inductors are investigated and compared in this work The physics-based models have the advantage in scalability and enable the prediction and optimization of inductor performance. The behavioral macro-model has the advantage in broadband modeling and may obtain better simulation accuracy in the time-domain analysis, especially for high-speed simulation. The two-port on-chip octagon spiral inductor has been fabricated using HHNEC 0.13 μm SiGe BiCMOS aluminum process to verify the fixed model. A good agreement is obtained between the measured data and calculation form the proposed model up to 40GHz.
{"title":"Comparison of lumped-parameter circuit models for on-chip spiral inductors","authors":"Bo Han, Ruxia Yue, Jun Li, Xiaofeng Shi, Daimu Wang","doi":"10.1109/APMC.2015.7412942","DOIUrl":"https://doi.org/10.1109/APMC.2015.7412942","url":null,"abstract":"One-π physics-based equivalent-circuit models and behavioral macro-model for on-chip spiral inductors are investigated and compared in this work The physics-based models have the advantage in scalability and enable the prediction and optimization of inductor performance. The behavioral macro-model has the advantage in broadband modeling and may obtain better simulation accuracy in the time-domain analysis, especially for high-speed simulation. The two-port on-chip octagon spiral inductor has been fabricated using HHNEC 0.13 μm SiGe BiCMOS aluminum process to verify the fixed model. A good agreement is obtained between the measured data and calculation form the proposed model up to 40GHz.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124194008","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}
In this paper, the propagation characteristics of UWB signal in the indoor complex environment are discussed based on the time domain uniform theory of diffraction (TD-UTD). A number of propagation parameters are analyzed by considering of multipath propagation mechanisms including direct ray, reflection, diffraction and transmission, such as the time-domain normalized electric field intensity, power delay profile, and so on. The results show that: (1) The direction path is the first to arrive the receiving point and it is the strongest signal in LOS (Line of Sight). (2) The multi-reflection, diffraction and transmission are important in NLOS (Non Line of Sight). For low loss medium wall, the transmission signal has strong power and cannot be ignored. These results provide the theoretical basis for wireless communication network coverage and optimization of UWB signal in the complex environment of indoor.
{"title":"Study on the multipath propagation model of UWB signal in the indoor environment based on TD-UTD","authors":"Shuangde Li, Yuanjian Liu, Xiao-jun Zhang, Furong Yin","doi":"10.1109/APMC.2015.7413460","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413460","url":null,"abstract":"In this paper, the propagation characteristics of UWB signal in the indoor complex environment are discussed based on the time domain uniform theory of diffraction (TD-UTD). A number of propagation parameters are analyzed by considering of multipath propagation mechanisms including direct ray, reflection, diffraction and transmission, such as the time-domain normalized electric field intensity, power delay profile, and so on. The results show that: (1) The direction path is the first to arrive the receiving point and it is the strongest signal in LOS (Line of Sight). (2) The multi-reflection, diffraction and transmission are important in NLOS (Non Line of Sight). For low loss medium wall, the transmission signal has strong power and cannot be ignored. These results provide the theoretical basis for wireless communication network coverage and optimization of UWB signal in the complex environment of indoor.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123204250","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 : 2015-12-01DOI: 10.1109/APMC.2015.7411797
Xiaolong Wang, Zhewang Ma, I. Sakagami, M. Yoshikawa, A. Mase
By using λ/4 coupled-line section to take place conventional λ/4 transmission line, a Wilkinson power divider with band-pass filter response and easy structure is presented in this paper. Design equations for characteristic impedances are derived from even- and odd-mode analysis. Design chart, frequency responses and several design examples are presented; the 3dB bandwidth is also discussed in this paper. In experiment, one circuit was fabricated, the measurement results showed good agreement with theoretical results.
{"title":"Wilkinson power divider with band-pass filter response and easy structure","authors":"Xiaolong Wang, Zhewang Ma, I. Sakagami, M. Yoshikawa, A. Mase","doi":"10.1109/APMC.2015.7411797","DOIUrl":"https://doi.org/10.1109/APMC.2015.7411797","url":null,"abstract":"By using λ/4 coupled-line section to take place conventional λ/4 transmission line, a Wilkinson power divider with band-pass filter response and easy structure is presented in this paper. Design equations for characteristic impedances are derived from even- and odd-mode analysis. Design chart, frequency responses and several design examples are presented; the 3dB bandwidth is also discussed in this paper. In experiment, one circuit was fabricated, the measurement results showed good agreement with theoretical results.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123219123","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 : 2015-12-01DOI: 10.1109/APMC.2015.7412965
H. Kim, S. Wang, W. Jung, J. Kim
Amplitude balanced two-section quadrature hybrid using a microstrip lines is proposed. The proposed microstrip quadrature hybrid with unequally reduced impedances compared to the original values of longitudinal and transverse branches was optimized using HFSS simulations. Two-section microstrip line hybrid has measured bandwidth of 34%, good amplitude balance of ± 0.35 dB, good reflection and isolation of 18 dB, and phase imbalance of 2° in the range of frequencies from 2.7 GHz to 3.8 GHz. The measured data of the proposed two-section hybrid is good consistent with HFSS simulations.
{"title":"Amplitude-balanced and broadband quadrature hybrid for radar and LTE applications","authors":"H. Kim, S. Wang, W. Jung, J. Kim","doi":"10.1109/APMC.2015.7412965","DOIUrl":"https://doi.org/10.1109/APMC.2015.7412965","url":null,"abstract":"Amplitude balanced two-section quadrature hybrid using a microstrip lines is proposed. The proposed microstrip quadrature hybrid with unequally reduced impedances compared to the original values of longitudinal and transverse branches was optimized using HFSS simulations. Two-section microstrip line hybrid has measured bandwidth of 34%, good amplitude balance of ± 0.35 dB, good reflection and isolation of 18 dB, and phase imbalance of 2° in the range of frequencies from 2.7 GHz to 3.8 GHz. The measured data of the proposed two-section hybrid is good consistent with HFSS simulations.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123614587","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 : 2015-12-01DOI: 10.1109/APMC.2015.7411655
Po-lin Huang, Kung-Chien Lin, Ching‐Wen Tang
A microstrip crossover with dual passbands is proposed. With the asymmetrical n-shaped transmission lines inserted into the window-shaped crossover, a wide and flexible operating frequency ratio can be obtained. Consequently, the even- and odd-mode analysis and the fourfold symmetry are adopted to derive the design equations. In order to validate the proposed structure, a crossover with a compact size, 0.38λg × 0.38 λg is fabricated.
{"title":"A microstrip dual-band crossover with asymmetrical transmission lines","authors":"Po-lin Huang, Kung-Chien Lin, Ching‐Wen Tang","doi":"10.1109/APMC.2015.7411655","DOIUrl":"https://doi.org/10.1109/APMC.2015.7411655","url":null,"abstract":"A microstrip crossover with dual passbands is proposed. With the asymmetrical n-shaped transmission lines inserted into the window-shaped crossover, a wide and flexible operating frequency ratio can be obtained. Consequently, the even- and odd-mode analysis and the fourfold symmetry are adopted to derive the design equations. In order to validate the proposed structure, a crossover with a compact size, 0.38λg × 0.38 λg is fabricated.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121221748","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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