Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616745
C. Shao, H. Tang, Li-Heng Zhou, Jian‐Xin Chen
In this paper, a pair of novel compact low temperature co-fired ceramic (LTCC) bandpass filters (BPFs) based on transmission line theory are proposed. The employed half wavelength (λg/2) resonator has been vertically folded to form a multi-layer transmission line resonator for minimizing the circuit size significantly. Since there is a virtual ground in the symmetrical plane of the multi-layer resonator, the characteristic of the resonator keeps almost unchanged. Transmission zeros have been realized near to the passband and in the stopband, which improve the selectivity and harmonic rejection of the BPFs. For demonstration, two BPFs centered at 3.1GHz and 10GHz are designed using the proposed resonator, and the circuit sizes are 5.1×3.9×1.8 mm3 and 4.0×3.9×1.5 mm3.
{"title":"Compact LTCC bandpass filters using vertically folded half wavelength resonator","authors":"C. Shao, H. Tang, Li-Heng Zhou, Jian‐Xin Chen","doi":"10.1109/IEEE-IWS.2013.6616745","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616745","url":null,"abstract":"In this paper, a pair of novel compact low temperature co-fired ceramic (LTCC) bandpass filters (BPFs) based on transmission line theory are proposed. The employed half wavelength (λg/2) resonator has been vertically folded to form a multi-layer transmission line resonator for minimizing the circuit size significantly. Since there is a virtual ground in the symmetrical plane of the multi-layer resonator, the characteristic of the resonator keeps almost unchanged. Transmission zeros have been realized near to the passband and in the stopband, which improve the selectivity and harmonic rejection of the BPFs. For demonstration, two BPFs centered at 3.1GHz and 10GHz are designed using the proposed resonator, and the circuit sizes are 5.1×3.9×1.8 mm3 and 4.0×3.9×1.5 mm3.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132472593","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616835
Xiang Chen, Wei Chen
In this paper, we mainly focus on the problem about the channel capacity and power allocation of the downlink process of a wireless two-way relay channel which is time-varying while the relay node has a total awareness of the channel side information. For situations differing about how receiving nodes know about messages for the other, we accordingly determine the channel capacities and the coding process using techniques such as network coding, superposition coding and nested coding; also the relay node should make corresponding strategies about power allocation with channel side information to attain the best average channel capacity, whose optimal solution in closed form is achieved using KKT conditions.
{"title":"Capacity of the broadcasting phase of time-varying two-way relaying","authors":"Xiang Chen, Wei Chen","doi":"10.1109/IEEE-IWS.2013.6616835","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616835","url":null,"abstract":"In this paper, we mainly focus on the problem about the channel capacity and power allocation of the downlink process of a wireless two-way relay channel which is time-varying while the relay node has a total awareness of the channel side information. For situations differing about how receiving nodes know about messages for the other, we accordingly determine the channel capacities and the coding process using techniques such as network coding, superposition coding and nested coding; also the relay node should make corresponding strategies about power allocation with channel side information to attain the best average channel capacity, whose optimal solution in closed form is achieved using KKT conditions.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114807402","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616780
P. Franck, C. C. Yap, C. Brun, S. Pacchini, W. Chow, H. Li, D. Baillargeat, B. Tay
Owing to their extraordinary electronic properties, carbon nanotubes (CNTs), as a building block, promise superior performance and novel functionalities for microwave electronic components. This review presents some of the last results obtained in three different fields of this fast moving area - antennas, interconnects and sensors. Electromagnetic and analytical models are used to evaluate and optimize component performance. Synergy between fabrication and simulation techniques allows the practical design of bundled-CNTs-based components. Opportunities are discussed from the fabrication of CNT materials (PECVD, CVD) to their implementation in components and systems by specific technological processes (Photolithography, Flip-Chip, Inkjet printing, etc.). Actual performance of fabricated prototypes and expected improvement based on the CNTs implementation are presented.
{"title":"Carbon-nanotube-based RF components with multiple applications","authors":"P. Franck, C. C. Yap, C. Brun, S. Pacchini, W. Chow, H. Li, D. Baillargeat, B. Tay","doi":"10.1109/IEEE-IWS.2013.6616780","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616780","url":null,"abstract":"Owing to their extraordinary electronic properties, carbon nanotubes (CNTs), as a building block, promise superior performance and novel functionalities for microwave electronic components. This review presents some of the last results obtained in three different fields of this fast moving area - antennas, interconnects and sensors. Electromagnetic and analytical models are used to evaluate and optimize component performance. Synergy between fabrication and simulation techniques allows the practical design of bundled-CNTs-based components. Opportunities are discussed from the fabrication of CNT materials (PECVD, CVD) to their implementation in components and systems by specific technological processes (Photolithography, Flip-Chip, Inkjet printing, etc.). Actual performance of fabricated prototypes and expected improvement based on the CNTs implementation are presented.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133989295","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616722
Runqi Zhang, Lei Zhu, S. Luo
A class of microstrip triple-mode bandpass filters (BPFs) using a patch-loaded cross resonator are modeled, designed and tested in this paper. First, a symmetrical equivalent LC network is developed for a symmetrical patch structure. The values of all the inductors and the capacitors are extracted by applying the even-odd mode analysis. Then, three 1-port networks are developed to analyze the resonant conditions of the corresponding modes. Finally, these first three resonant modes are used to form a passband with three transmission poles. To verify the proposed design methodology, two sets of filter prototypes with different loaded patches are designed, fabricated and measured in the end. The predicted results are well confirmed with the experimental ones.
{"title":"Design methodology of a class of triple-mode bandpass filters using a patch-loaded cross resonator","authors":"Runqi Zhang, Lei Zhu, S. Luo","doi":"10.1109/IEEE-IWS.2013.6616722","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616722","url":null,"abstract":"A class of microstrip triple-mode bandpass filters (BPFs) using a patch-loaded cross resonator are modeled, designed and tested in this paper. First, a symmetrical equivalent LC network is developed for a symmetrical patch structure. The values of all the inductors and the capacitors are extracted by applying the even-odd mode analysis. Then, three 1-port networks are developed to analyze the resonant conditions of the corresponding modes. Finally, these first three resonant modes are used to form a passband with three transmission poles. To verify the proposed design methodology, two sets of filter prototypes with different loaded patches are designed, fabricated and measured in the end. The predicted results are well confirmed with the experimental ones.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123420641","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616733
Peng Chu, W. Hong, K. Wu
This paper propose a novel Spur Stepped Impedance Resonator (SSIR). Developed from the classical Stepped Impedance Resonator (SIR) without additional or complicated circuit occupying, almost keeping the same compact size and quality factor, the SSIR has tunable spurious resonances while keeping fundamental resonance frequency almost unchanged, and a tapped SSIR will produce tunable transmission zeros without interfering with the fundamental resonance or the loaded quality. A simple demo application of SSIR on designing bandpass filter with extended stopband is proposed, fabricated and measured.
{"title":"A novel Spur Stepped Impedance Resonator","authors":"Peng Chu, W. Hong, K. Wu","doi":"10.1109/IEEE-IWS.2013.6616733","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616733","url":null,"abstract":"This paper propose a novel Spur Stepped Impedance Resonator (SSIR). Developed from the classical Stepped Impedance Resonator (SIR) without additional or complicated circuit occupying, almost keeping the same compact size and quality factor, the SSIR has tunable spurious resonances while keeping fundamental resonance frequency almost unchanged, and a tapped SSIR will produce tunable transmission zeros without interfering with the fundamental resonance or the loaded quality. A simple demo application of SSIR on designing bandpass filter with extended stopband is proposed, fabricated and measured.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130092472","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616741
L. Yan, Viktor Krozer, R. Michaelsen, T. Djurhuus, Tom K. Johansen
In this work, a physical Schottky barrier diode model is presented. The model is based on physical parameters such as anode area, Ohmic contact area, doping profile from epitaxial (EPI) and substrate (SUB) layers, layer thicknesses, barrier height, specific contact resistance, and device temperature. The effects of barrier height lowering, nonlinear resistance from the EPI layer, and hot electron noise are all included for accurate characterization of the Schottky diode. To verify the diode model, measured I-V and C-V characteristics are compared with the simulation results. Due to the lack of measurement data for noise behaviors, simulated noise temperature is compared with the experimental data found from the open literature.
{"title":"Physical based Schottky barrier diode modeling for THz applications","authors":"L. Yan, Viktor Krozer, R. Michaelsen, T. Djurhuus, Tom K. Johansen","doi":"10.1109/IEEE-IWS.2013.6616741","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616741","url":null,"abstract":"In this work, a physical Schottky barrier diode model is presented. The model is based on physical parameters such as anode area, Ohmic contact area, doping profile from epitaxial (EPI) and substrate (SUB) layers, layer thicknesses, barrier height, specific contact resistance, and device temperature. The effects of barrier height lowering, nonlinear resistance from the EPI layer, and hot electron noise are all included for accurate characterization of the Schottky diode. To verify the diode model, measured I-V and C-V characteristics are compared with the simulation results. Due to the lack of measurement data for noise behaviors, simulated noise temperature is compared with the experimental data found from the open literature.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130353820","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616768
Xuguo Huang, S. Lucyszyn
A low loss silicon RFIC UWB bandpass filter is reported. The filter exploits a novel metalized coupled trench structure, fabricated by advanced silicon bulk micromachining. The couplers can achieve more than -2 dB coupling, with good even-odd mode phase velocity balance, while having practical dimensions. The CPW filter is designed using well-known interdigital filter design equations. The measured fractional bandwidth is 115%, with only 1 dB mid-band insertion loss at 6.4 GHz and better than -11 dB return loss across the whole passband. The measured differential-phase group delay is less than 200 ps from 2.6 to 10.1 GHz. Being a monolithic filter, it has a compact area of only 3.5 × 5.5 mm2.
{"title":"Silicon RFIC UWB bandpass filter using bulk-micromachined trench couplers","authors":"Xuguo Huang, S. Lucyszyn","doi":"10.1109/IEEE-IWS.2013.6616768","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616768","url":null,"abstract":"A low loss silicon RFIC UWB bandpass filter is reported. The filter exploits a novel metalized coupled trench structure, fabricated by advanced silicon bulk micromachining. The couplers can achieve more than -2 dB coupling, with good even-odd mode phase velocity balance, while having practical dimensions. The CPW filter is designed using well-known interdigital filter design equations. The measured fractional bandwidth is 115%, with only 1 dB mid-band insertion loss at 6.4 GHz and better than -11 dB return loss across the whole passband. The measured differential-phase group delay is less than 200 ps from 2.6 to 10.1 GHz. Being a monolithic filter, it has a compact area of only 3.5 × 5.5 mm2.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124354291","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616696
Cheng-Hsing Hsu, P. Wu
A design of planar rectangular slot antenna with microstrip-line-fed is presented. The proposed antenna has a simple structure consisting of a modified rectangular slot ground plane, microstrip-line-fed act as a tuning stub of the antenna, placed at the opposite side of the feed. The proposed antenna is developed, and its measured characteristics are good agreement with the simulated results. From experimental results, the antenna can generate two bands centered at about 1.8 and 5.8 GHz to cover the GSM system and Wi-Fi band. Good return loss and radiation pattern characteristics are obtained over the two operation bands.
{"title":"Microstrip-line-fed wide rectangular slot antenna for multiband operation","authors":"Cheng-Hsing Hsu, P. Wu","doi":"10.1109/IEEE-IWS.2013.6616696","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616696","url":null,"abstract":"A design of planar rectangular slot antenna with microstrip-line-fed is presented. The proposed antenna has a simple structure consisting of a modified rectangular slot ground plane, microstrip-line-fed act as a tuning stub of the antenna, placed at the opposite side of the feed. The proposed antenna is developed, and its measured characteristics are good agreement with the simulated results. From experimental results, the antenna can generate two bands centered at about 1.8 and 5.8 GHz to cover the GSM system and Wi-Fi band. Good return loss and radiation pattern characteristics are obtained over the two operation bands.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124509557","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616808
Y. Cheng, Lei Wang, Jie Wu, Fan Yong
A frequency-agile directional coupler incorporating the bandpass frequency response characteristic is proposed and characterized in this paper. This structure is modified from a conventional branch-line coupler and composed of two wide open-ended coupled lines. As such, it has good restraint performance outside the passband. Frequency tuning is achieved by modifying the electrical length of the open-ended coupled lines loaded with varactors. Measured results are in agreement with predictions, which validate the correctness of our theory and design.
{"title":"Frequency-agile directional coupler with good restraint outside the passband based on the coupled transmission line","authors":"Y. Cheng, Lei Wang, Jie Wu, Fan Yong","doi":"10.1109/IEEE-IWS.2013.6616808","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616808","url":null,"abstract":"A frequency-agile directional coupler incorporating the bandpass frequency response characteristic is proposed and characterized in this paper. This structure is modified from a conventional branch-line coupler and composed of two wide open-ended coupled lines. As such, it has good restraint performance outside the passband. Frequency tuning is achieved by modifying the electrical length of the open-ended coupled lines loaded with varactors. Measured results are in agreement with predictions, which validate the correctness of our theory and design.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114789112","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616719
Zhang Haiwei, Xue Quan
A novel Gysel power divider with arbitrary power ratio for high-power application is presented in this paper. The power dividing ratio can be conveniently assigned by controlling the length of two branch lines without any changes in other branches. The characteristics of all the transmission lines in this divider are fixed to the same value based on the theoretical analysis, which will simplify the design procedure of unequal Gysel power. Besides, the power ratio in this Gysel power divider can be designed from 0 to ∞ without employing high impedance transmission line, which is unrealized in the conventional Gysel power divider. In order to evaluate the performance of the novel Gysel power divider, two dividers with dividing ratios of 2:1 and 4:1 are fabricated and examined. From the results it can be observed that there is excellent agreement between the simulated and measured results.
{"title":"A novel Gysel power divider with arbitrary power ratio for high-power application","authors":"Zhang Haiwei, Xue Quan","doi":"10.1109/IEEE-IWS.2013.6616719","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616719","url":null,"abstract":"A novel Gysel power divider with arbitrary power ratio for high-power application is presented in this paper. The power dividing ratio can be conveniently assigned by controlling the length of two branch lines without any changes in other branches. The characteristics of all the transmission lines in this divider are fixed to the same value based on the theoretical analysis, which will simplify the design procedure of unequal Gysel power. Besides, the power ratio in this Gysel power divider can be designed from 0 to ∞ without employing high impedance transmission line, which is unrealized in the conventional Gysel power divider. In order to evaluate the performance of the novel Gysel power divider, two dividers with dividing ratios of 2:1 and 4:1 are fabricated and examined. From the results it can be observed that there is excellent agreement between the simulated and measured results.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121476725","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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