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The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology最新文献

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A novel power dependent input distribution network for Doherty amplifier efficiency improvement 一种新的功率相关输入配电网，用于提高多尔蒂放大器的效率
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238107
Q. Li, Y. Luo, J. Zha, J. Liu
{"title":"A novel power dependent input distribution network for Doherty amplifier efficiency improvement","authors":"Q. Li, Y. Luo, J. Zha, J. Liu","doi":"10.1109/MMWCST.2012.6238107","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238107","url":null,"abstract":"This paper researches on the effect of input network on performance of power added efficiency (PAE) in a Doherty circuit. A new technique based on an adaptive input-power distribution is introduced to overcome the limitations of practical Doherty power amplifiers. The extended-resonance divider is designed by exploiting the peaking amplifier's nonlinear input impedance, so that more power can be delivered to the carrier and peaking amplifiers in the low and high power regions, respectively. Therefore, the two amplifiers are efficiently driven and can generate output current and voltage characteristics similar to the ideal Doherty amplifier. The PAE of the new Doherty amplifier is improved by 2%-3% compared with a conventional design through simulations as a result.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125700669","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}
引用次数: 2
A novel compact ridge waveguide band-stop filter for harmonic suppression 一种用于谐波抑制的新型紧凑型脊波导带阻滤波器
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238199
Kunshan Mo, Qingyuan Wang, Dawei Song, Yicheng Tan
{"title":"A novel compact ridge waveguide band-stop filter for harmonic suppression","authors":"Kunshan Mo, Qingyuan Wang, Dawei Song, Yicheng Tan","doi":"10.1109/MMWCST.2012.6238199","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238199","url":null,"abstract":"A novel compact ridge waveguide band-stop filter with harmonic suppression is presented in this paper. The filter is composed of a waveguide, a ridge and some stagger-placed tuning screws. To validate the structure, an order-3 filter is designed, simulated and optimized as an example. The stop-band of the filter is 18-20GHz and pass-band frequency range is 8-12 GHz. In addition, we have designed an order-11 filter to demonstrate the bandwidth and suppression can be improved by increasing the number of orders.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"1335 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116604394","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}
引用次数: 0
Design of a composite multi-aperture array circular directional coupler for high power gyrotron 大功率回旋管复合多孔径阵列圆形定向耦合器的设计
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238121
Guo Liu, Yong Luo, Jian-xun Wang
{"title":"Design of a composite multi-aperture array circular directional coupler for high power gyrotron","authors":"Guo Liu, Yong Luo, Jian-xun Wang","doi":"10.1109/MMWCST.2012.6238121","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238121","url":null,"abstract":"A composite multi-aperture array circular-rectangular waveguide directional coupler is designed for measuring gyrotron output power and monitoring spectrum with loose-coupling theory. The coupling characteristics of 20-aperture directional coupler with the distribution of Chebychev-equal radius are performed by theoretical analysis and CST microwave studio (CST-MWS) simulations. Results indicate that the composite distribution possesses both the advantages of smaller ripple, higher directivity and wider bandwidth. Simultaneously, we also discover that increasing the thickness and declining the radius of the apertures will be beneficial for weakening the ripple of coupling coefficient. In addition, proper rectangular waveguide size and distance between the last and penultimate aperture of the array can improve the directivity effectively.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131369887","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}
引用次数: 5
Ameliorative design of the cascade trisection filter with different feed structure 不同进料结构的串级三分滤波器的改进设计
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238162
Zong-rui Deng, Long Jin, P. Wang, Hai-bo Chen
{"title":"Ameliorative design of the cascade trisection filter with different feed structure","authors":"Zong-rui Deng, Long Jin, P. Wang, Hai-bo Chen","doi":"10.1109/MMWCST.2012.6238162","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238162","url":null,"abstract":"Cascade trisection network is a good way to achieve the cross-coupling bandpass filter, this paper give a ameliorative design from the CT network, especially pay attention to the feed structure to improve the filter's characteristic, at last give the compared result of the new design.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134288961","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}
引用次数: 0
Design of novel dual band-notched disk monopole antennas 新型双带陷波圆盘单极天线的设计
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238186
Feifei Zhao, Hongyan Tang, Chen Zhao, Xiulei Gao, Pu Zhuo, Fuyun Zhang
{"title":"Design of novel dual band-notched disk monopole antennas","authors":"Feifei Zhao, Hongyan Tang, Chen Zhao, Xiulei Gao, Pu Zhuo, Fuyun Zhang","doi":"10.1109/MMWCST.2012.6238186","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238186","url":null,"abstract":"This paper presents a novel monopole antenna with dual band-notched characteristics and a half-patch broadband circular microstrip antenna. To obtain this feature, two optimized arc-shaped slot is embedded to the disk monopole UWB antenna. The normal type of disk monopole antenna is used to achieve the wide impedance bandwidth. An omnidirectional radiation pattern is also achieved, which enables the proposed antenna to be used in communication systems. Based on the full patch microstrip antenna which has ultra bandwidth for embedding a pair of double circular slots, the half patch antenna is obtained by cutting away half of patch radiator. The half patch antenna has the similar impedance bandwidth compared with the full patch antenna, with compact size and lower cost.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134444989","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}
引用次数: 5
Fast direction finding algorithm for circular array based on directional antenna 基于定向天线的圆阵快速测向算法
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238158
Cheng‐Bing Chang, Ting Cheng, Hongjuan Lin
{"title":"Fast direction finding algorithm for circular array based on directional antenna","authors":"Cheng‐Bing Chang, Ting Cheng, Hongjuan Lin","doi":"10.1109/MMWCST.2012.6238158","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238158","url":null,"abstract":"Under the background of satellite communication, MUSIC algorithm with fast searching strategy is put forward to find the directions of signals for circular array based on directional antennas. The signal model of directional antenna array is given first, on this basis, the MUSIC algorithm is used. Furthermore, two auxiliary angles are introduced and a fast peak searching method is proposed. Simulation results demonstrate the directional antennas can improve the performance of estimation results and the proposed searching method can reduce the searching complexity effectively.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117121028","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}
引用次数: 4
Characteristic analysis of nose radome by aperture-integration and surface-integration method 基于孔径积分和曲面积分的鼻雷达罩特性分析
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238208
Juan Wang, Gaofeng Guo, Hu Zheng, E. Li
{"title":"Characteristic analysis of nose radome by aperture-integration and surface-integration method","authors":"Juan Wang, Gaofeng Guo, Hu Zheng, E. Li","doi":"10.1109/MMWCST.2012.6238208","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238208","url":null,"abstract":"In this paper, the effects of semi-spherical radome and nose radome enclosed on the characteristics of antenna are investigated in detail by the means of aperture-integration and surface-integration (AI-SI). The AI-SI method is superior to ray tracing when the radome curvature varies significantly. Besides, this algorithm is simply and can be appropriate for any aperture. Calculated far-field patterns enclosed semi-spherical using this numerically technique agree well with the exact pattern for an aperture antenna radiating. In the presence of nose radome with εr=5.2-0.08j, the energy transmission is 73.7%.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115764020","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}
引用次数: 4
Antenna cancellation used for collocated radios 天线对消，用于配置无线电
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238155
Xinyi Luo, K. Qian
{"title":"Antenna cancellation used for collocated radios","authors":"Xinyi Luo, K. Qian","doi":"10.1109/MMWCST.2012.6238155","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238155","url":null,"abstract":"An interference cancellation scheme combining Antenna Cancellation, RF Cancellation and Digital Cancellation is presented in this paper. The simulation result present that the mutual interference can be sufficiently cancellated. Instead of past works using software layer approaches to solve the compatibility of Bluetooth and Wi-Fi, great improvements in RF hardware circuit is able to guarantee both wireless networks can work at the same time independently aiming to achieve the high efficiency of signal transmission. This method is extensible to other mutually interfering radio devices.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126447561","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}
引用次数: 0
Design of X-band H-plane waveguide Y-junction circulator x波段h面波导y结环行器的设计
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238205
Xueling Li, E. Li, Gaofeng Guo
{"title":"Design of X-band H-plane waveguide Y-junction circulator","authors":"Xueling Li, E. Li, Gaofeng Guo","doi":"10.1109/MMWCST.2012.6238205","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238205","url":null,"abstract":"This paper presents an approach to the design of three-port H-plane waveguide Y-junction circulator with two partial height ferrite posts in the junction region which has the advantages of high isolation and low insertion loss. With 9.375GHz center frequency and 400MHz bandwidth, the X-band waveguide circulator designed with the approach could be used in microwave measurement systems, whose VSWR is less than 1.2, insertion loss is less than 1dB and isolation is more than 20dB, which could be used in medium power systems and high power systems.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"25 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125673175","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}
引用次数: 5
Design of a 220GHz Vlasov (antenna) mode converter 220GHz Vlasov(天线)模式转换器的设计
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238113
Xianrong Zhang, Qingyuan Wang, Yong Cheng, Song Wen
{"title":"Design of a 220GHz Vlasov (antenna) mode converter","authors":"Xianrong Zhang, Qingyuan Wang, Yong Cheng, Song Wen","doi":"10.1109/MMWCST.2012.6238113","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238113","url":null,"abstract":"A Vlasov antenna (mode converter) for a center frequency of 220 GHz, which includes a Vlasov-type step-cut launcher and a parabolic reflector, is proposed in this paper. It converts the TE03 mode in circular waveguide to a highly Gaussian-like beam at the output window. Optimization is carried out and good results have been achieved with the VSWR 1.2 at 190-250GHz and the conversion efficiency greater than 80%. Simulation results showed that the radiation gain of the Gaussian-like beam is 31.8dB.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121995494","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}
引用次数: 4
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