Pub Date : 2008-12-01DOI: 10.1109/IMWS.2008.4782301
Bo Lu, Ka-Ma Huang
According to the principle of unity of opposition in the natural tree growing and wilting, the competitive algorithm of simulating natural tree growth is presented in this paper. The algorithm is also used to optimize a tree-shaped line antenna whose directive gain is higher than that of the traditional antennas in the same size.
{"title":"Competitive Algorithm of Simulating Natural Tree Growth and its Application in Antenna Design","authors":"Bo Lu, Ka-Ma Huang","doi":"10.1109/IMWS.2008.4782301","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782301","url":null,"abstract":"According to the principle of unity of opposition in the natural tree growing and wilting, the competitive algorithm of simulating natural tree growth is presented in this paper. The algorithm is also used to optimize a tree-shaped line antenna whose directive gain is higher than that of the traditional antennas in the same size.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115867058","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782300
Tianle Pu, Ka-Ma Huang
A novel double negative(DNG)structure is proposed and a patch antenna using it as substrate based on the back wave(BW) theory is simulated in the paper. The result of the simulation shows the relative bandwidth of the DNG is wider than existing structures. It also shows that the novel structure has a very small electrical dimension and suitable for the substrate of patch antenna. By using this substrate, the size of the patch antenna can be reduced obviously.
{"title":"A Novel Double Negative Substrate for Miniature Patch Antenna","authors":"Tianle Pu, Ka-Ma Huang","doi":"10.1109/IMWS.2008.4782300","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782300","url":null,"abstract":"A novel double negative(DNG)structure is proposed and a patch antenna using it as substrate based on the back wave(BW) theory is simulated in the paper. The result of the simulation shows the relative bandwidth of the DNG is wider than existing structures. It also shows that the novel structure has a very small electrical dimension and suitable for the substrate of patch antenna. By using this substrate, the size of the patch antenna can be reduced obviously.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124027721","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782262
Yan Ding, K. Wu
Substrate integrated waveguide (SIW) has become popular and it has widely been used in microwave and millimeter wave circuit and system designs. Compared to other planar transmission lines, the geometrical dimension, in particular, the width of an SIW is much larger, which depends on the operating frequency and substrate material. Therefore, an effective SIW miniaturization is required for developing a high-density integration in circuit design. In this paper, three miniaturization techniques of SIW circuits are discussed in order to achieve a high compression ratio. A group of SIW transmission lines based on these miniaturization techniques are analyzed and their propagation constants and quality factors are extracted for comparison.
{"title":"Miniaturization Techniques of Substrate Integrated Waveguide Circuits","authors":"Yan Ding, K. Wu","doi":"10.1109/IMWS.2008.4782262","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782262","url":null,"abstract":"Substrate integrated waveguide (SIW) has become popular and it has widely been used in microwave and millimeter wave circuit and system designs. Compared to other planar transmission lines, the geometrical dimension, in particular, the width of an SIW is much larger, which depends on the operating frequency and substrate material. Therefore, an effective SIW miniaturization is required for developing a high-density integration in circuit design. In this paper, three miniaturization techniques of SIW circuits are discussed in order to achieve a high compression ratio. A group of SIW transmission lines based on these miniaturization techniques are analyzed and their propagation constants and quality factors are extracted for comparison.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124042736","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782252
Hui Huang, J. Mao
A novel electromagnetic bandgap (EBG) of periodic rings etched on a YBCO microstrip line is presented and a minimized bandstop filter of high performance is obtained. In addition, this paper also develops a miniature EBG high temperature superconductors (HTS) disk filter with high power handling capability by etching five circular holes from a disc resonator.
{"title":"Design of Minimized Electromagnetic Bandgap Structure High Temperature Superconducting Filter","authors":"Hui Huang, J. Mao","doi":"10.1109/IMWS.2008.4782252","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782252","url":null,"abstract":"A novel electromagnetic bandgap (EBG) of periodic rings etched on a YBCO microstrip line is presented and a minimized bandstop filter of high performance is obtained. In addition, this paper also develops a miniature EBG high temperature superconductors (HTS) disk filter with high power handling capability by etching five circular holes from a disc resonator.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122280979","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782282
Jun He, Bing-Zhong Wang, W. Shao, S. Xiao
A compact microstrip branch-line coupler with capacitor loading is presented. The new structure not only effectively reduces the occupied area to 33% of the conventional branch-line coupler at 1.0 GHz, but also has high harmonic suppression performance over a wide band. Furthermore, the new structure has only four variable parameters and can be easily designed. The design is validated both by simulation and measurement.
{"title":"A Compact Microstrip Branch-Line Coupler with Capacitor Loading","authors":"Jun He, Bing-Zhong Wang, W. Shao, S. Xiao","doi":"10.1109/IMWS.2008.4782282","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782282","url":null,"abstract":"A compact microstrip branch-line coupler with capacitor loading is presented. The new structure not only effectively reduces the occupied area to 33% of the conventional branch-line coupler at 1.0 GHz, but also has high harmonic suppression performance over a wide band. Furthermore, the new structure has only four variable parameters and can be easily designed. The design is validated both by simulation and measurement.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126579993","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782255
G. Sisó, J. Bonache, F. Martín
In this work, it is shown that dual-band microwave components based on plusmn90deg metamaterial transmission lines can be miniaturized by implementing the artificial lines by means of complementary spiral resonators (CSRs). Such lines exhibit a composite right/left handed (CRLH) behavior. Dual-band operation is achieved by designing the lines to provide a phase of -90o at the lower operating frequency (within the left handed band) and +90o phase shift at the upper frequency (within the right handed band). Size reduction, as compared to conventional implementations, is achieved by implementing the lines with a single unit cell, and thanks to the small electrical size of CSRs. To illustrate the possibilities of the approach, a dual-band branch-line coupler based on metamaterial transmission lines implemented by means of CSRs is presented. The device has been designed to be functional at the mobile GSM bands (f1= 0.9 GHz, f2= 1.8 GHz). As compared to the conventional branch line, a 40% size reduction is obtained. The approach is fully compatible with planar technology.
{"title":"Miniaturization and Dual-Band Operation in Planar Microwave Components by Using Resonant-Type Metamaterial Transmission Lines","authors":"G. Sisó, J. Bonache, F. Martín","doi":"10.1109/IMWS.2008.4782255","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782255","url":null,"abstract":"In this work, it is shown that dual-band microwave components based on plusmn90deg metamaterial transmission lines can be miniaturized by implementing the artificial lines by means of complementary spiral resonators (CSRs). Such lines exhibit a composite right/left handed (CRLH) behavior. Dual-band operation is achieved by designing the lines to provide a phase of -90o at the lower operating frequency (within the left handed band) and +90o phase shift at the upper frequency (within the right handed band). Size reduction, as compared to conventional implementations, is achieved by implementing the lines with a single unit cell, and thanks to the small electrical size of CSRs. To illustrate the possibilities of the approach, a dual-band branch-line coupler based on metamaterial transmission lines implemented by means of CSRs is presented. The device has been designed to be functional at the mobile GSM bands (f1= 0.9 GHz, f2= 1.8 GHz). As compared to the conventional branch line, a 40% size reduction is obtained. The approach is fully compatible with planar technology.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133978194","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782271
S. Kahng, J. Ju
This paper presents the design of a size-reduced Bandpass Filter working in the UHF band. To minimize the overall size of the component, the concept of Left-Handedness is adopted and combined with Right-handed lines for using the resonators as small as around one eighth of a quarter-wavelength as well as suppressing higher ordered harmonics. In addition to the basic metamaterial theory, the inverters are included and implemented for C-coupling. This design method is validated by the physical realization as well as rigorous simulations.
{"title":"Realized Metamaterial CRLH Bandpass Filter for UHF-Band WLAN with Harmonics Suppressed","authors":"S. Kahng, J. Ju","doi":"10.1109/IMWS.2008.4782271","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782271","url":null,"abstract":"This paper presents the design of a size-reduced Bandpass Filter working in the UHF band. To minimize the overall size of the component, the concept of Left-Handedness is adopted and combined with Right-handed lines for using the resonators as small as around one eighth of a quarter-wavelength as well as suppressing higher ordered harmonics. In addition to the basic metamaterial theory, the inverters are included and implemented for C-coupling. This design method is validated by the physical realization as well as rigorous simulations.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122280909","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782302
Xiao-bin Hu, Zheng-Yong Yu, W. Tang, Xiao-Ke Wang
In this paper, simple CAD formulas are obtained for the capacitance matrix of asymmetric broadside coupled stripline by synthetic asymptote. The formulas have good physical insights with only one arbitrary constant. Compared with numerical results by moment method, the average error of the formulas is less than 2%.
{"title":"Simple Formulas of the Capacitances for Broadside Coupled Stripline by Synthetic Asymptote","authors":"Xiao-bin Hu, Zheng-Yong Yu, W. Tang, Xiao-Ke Wang","doi":"10.1109/IMWS.2008.4782302","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782302","url":null,"abstract":"In this paper, simple CAD formulas are obtained for the capacitance matrix of asymmetric broadside coupled stripline by synthetic asymptote. The formulas have good physical insights with only one arbitrary constant. Compared with numerical results by moment method, the average error of the formulas is less than 2%.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114398067","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782249
Ian Hunter, A. Abunjaileh
This paper will describe recent advances in techniques for the design and realisation of microwave filters for a variety of applications including mobile and satellite communications, and radar. The first area, lossy filters, is that of the synthesis of filters with finite dissipation loss. This enables the realisation of highly selective filters with lower resonator Q factor than conventional design approaches, consequently reducing the physical size of filters in receiver applications. The second approach, frequency selective limiters, is a non-linear filtering technique which reduces the dynamic range of signals across a wide frequency band, enabling simpler A-D conversion of radar signals. The third technique, reconfigurable filters, is a new method for constructing tunable bandpass filters with low loss and high intercept point. Finally we will present results on techniques for the design of multi-mode patch antennas with filtering characteristics, enabling wider band and multiband operation.
{"title":"Recent Advances in Microwave Filters","authors":"Ian Hunter, A. Abunjaileh","doi":"10.1109/IMWS.2008.4782249","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782249","url":null,"abstract":"This paper will describe recent advances in techniques for the design and realisation of microwave filters for a variety of applications including mobile and satellite communications, and radar. The first area, lossy filters, is that of the synthesis of filters with finite dissipation loss. This enables the realisation of highly selective filters with lower resonator Q factor than conventional design approaches, consequently reducing the physical size of filters in receiver applications. The second approach, frequency selective limiters, is a non-linear filtering technique which reduces the dynamic range of signals across a wide frequency band, enabling simpler A-D conversion of radar signals. The third technique, reconfigurable filters, is a new method for constructing tunable bandpass filters with low loss and high intercept point. Finally we will present results on techniques for the design of multi-mode patch antennas with filtering characteristics, enabling wider band and multiband operation.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"28 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124549473","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 : 2008-12-01DOI: 10.1109/IMWS.2008.4782308
Huisheng Wang, X. Li
This paper presents a design approach for an asymmetrical lambda/2 resonators bandpass filter by using the artificial neural network (ANN) modeling technique. Three important dimensions of the filter layout are used to capture critical input-output relationships in the ANN model. Once fully developed, the ANN model has been shown to be as accurate as an EM simulator and much more efficient computationally in the design optimization of the filter.
{"title":"Asymmetrical Two λ/2 Resonators Bandpass Filter Design by Artificial Neural Network Modeling","authors":"Huisheng Wang, X. Li","doi":"10.1109/IMWS.2008.4782308","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782308","url":null,"abstract":"This paper presents a design approach for an asymmetrical lambda/2 resonators bandpass filter by using the artificial neural network (ANN) modeling technique. Three important dimensions of the filter layout are used to capture critical input-output relationships in the ANN model. Once fully developed, the ANN model has been shown to be as accurate as an EM simulator and much more efficient computationally in the design optimization of the filter.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131993482","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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