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2005 Asia-Pacific Microwave Conference Proceedings最新文献

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Design of 60-GHz vertically stacked waveguide filters in LTCC LTCC中60ghz垂直堆叠波导滤波器的设计
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606368
T. Shen, Ting-Yi Hung, Chi‐Feng Chen, R. Wu
{"title":"Design of 60-GHz vertically stacked waveguide filters in LTCC","authors":"T. Shen, Ting-Yi Hung, Chi‐Feng Chen, R. Wu","doi":"10.1109/APMC.2005.1606368","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606368","url":null,"abstract":"This paper proposes a new type of vertically stacked waveguide filters in a multilayer low-temperature co-fired ceramic (LTCC) structure. The vertical metal walls of the waveguide resonators are realized by closely spaced metal filled vias, while adjacent resonators are coupled vertically by square apertures or narrow slots. Two kinds of filters with Chebyshev and elliptical response are designed for 60-GHz-band application. From the results, the circuit area of the filter with Chebyshev response can be reduced to 25% as compared to a conventional planar direct-coupled waveguide filter.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124960692","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: 1
Integral equation solution of scattering by general bi-isotropic bodies 一般双各向同性物体散射的积分方程解
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606568
D.X. Wang, P. Lau, E. Yung, R. Chen
{"title":"Integral equation solution of scattering by general bi-isotropic bodies","authors":"D.X. Wang, P. Lau, E. Yung, R. Chen","doi":"10.1109/APMC.2005.1606568","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606568","url":null,"abstract":"A combined field integral equation method based on the equivalent principle is presented for the solution of scattering by a general bi-isotropic body. The resulting combined equations are established through splitting given fields into two wavefields, each of which corresponds to respective isotropic mediums. For the modeling of arbitrarily shaped surfaces, the triangulated patches are employed and the Rao-Wilton-Gllison function is selected as the basis function and testing function when the moment of method is applied to solve the resulting integral equations numerically. Numerical results for Pasteur-type bodies are compared with the existing data and good agreements are obtained. Also, the Tellegen-type bodies are calculated. The effects of constitutive parameters on the bistatic cross section are investigated and discussed.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129484471","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
Realization of arbitrary dual-band components using an improved CRLH transmission-line model 利用改进的CRLH传输在线模型实现任意双频元件
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606276
X. Lin, Ruopeng Liu, X. Yang, Ji Xin Chen, Xiaoxing Yin, Q. Cheng, T. Cui
{"title":"Realization of arbitrary dual-band components using an improved CRLH transmission-line model","authors":"X. Lin, Ruopeng Liu, X. Yang, Ji Xin Chen, Xiaoxing Yin, Q. Cheng, T. Cui","doi":"10.1109/APMC.2005.1606276","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606276","url":null,"abstract":"In this paper, new structures with nonlinear phase responses are proposed based on the composite right /left-handed (CRLH) transmission lines. Using such improved CRLH structure, arbitrary dual-band microstrip components have been realized, such as a quarter-wavelength open/short-circuited stub, and a dual-band branch-line coupler, etc. This has been demonstrated by both simulated and measured results. Compared to the conventional CRLH structures, the novel components are more compact and are easier to be realized.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129929272","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: 3
Performance analysis for CDMA communications with smart antennas 基于智能天线的CDMA通信性能分析
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606626
Min Lin, Min Li, Luxi Yang
{"title":"Performance analysis for CDMA communications with smart antennas","authors":"Min Lin, Min Li, Luxi Yang","doi":"10.1109/APMC.2005.1606626","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606626","url":null,"abstract":"In CDMA communications, theoretical analysis and system experiments verify that the system capacity and quality can be significantly improved through using smart antennas. However, to get accurate performance prediction which is useful to engineering design, realistic imperfect effects should not be ignored. In this paper, based on the low side-lobe array radiation patterns, which take the effect of mutual coupling between elements into account, we present the interference suppression coefficients of the co-channel access interference (CCI) and the multiple access interference (MAI), and derive the approximate formulas of the output signal to interference plus noise ratio (SINR/sub O/) and the bit error rate (BER). These formulas provide a fast and simple way to evaluate the performance of CDMA systems with smart antennas.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126896481","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
Multi-band sub wavelength magnetic reflectors based on spiral 基于螺旋的多波段亚波长磁反射器
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606738
Haiquan Yang, Zeyong Wei, Hong-qiang Li
{"title":"Multi-band sub wavelength magnetic reflectors based on spiral","authors":"Haiquan Yang, Zeyong Wei, Hong-qiang Li","doi":"10.1109/APMC.2005.1606738","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606738","url":null,"abstract":"We report our experimental and theoretical studies on a metamaterials consisting of a metallic planar spiral with a metallic ground separated by a thin dielectric layer. We show that this structure, which is of isotropic with multi-band, can reflect electromagnetic wave in-phase at a series of frequencies and of subwavelength size at some lower resonance frequencies. This phenomenon is mainly governed by a series of holistic magnetic resonances.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123824662","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
Small-sized spiral dipole antenna for RFID transponder of UHF band 用于超高频RFID应答器的小型螺旋偶极子天线
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606893
Kihun Chang, S. Kwak, Y. Yoon
{"title":"Small-sized spiral dipole antenna for RFID transponder of UHF band","authors":"Kihun Chang, S. Kwak, Y. Yoon","doi":"10.1109/APMC.2005.1606893","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606893","url":null,"abstract":"In this paper, the small-sized spiral dipole antenna for UHF RFID transponder is proposed. For the expected application of the UHF RFID systems, such as a supply chain integration, industrial automation, track and trace, and so on, the small and efficient printed antenna is required. To reduce the antenna size and to minimize the efficiency lowering due to small size, the proposed antenna is designed to have the spiral structure rather than the meander structure. In this structure, the current cancellation on the antenna is much less than in the meander structures, and the total current induces an identical magnetic dipole, which makes the omni-directional radiation pattern. The proposed antenna is designed for UHF RFID systems of Korea, to have the operating frequency bandwidth of 908 MHz-913 MHz for VSWR < 2. The antenna has the physical size of 15.5 mm by 14.8 mm, which is about lambda over 16 in electrical length. This antenna is fabricated on the PET dielectric, to be utilized as an antenna of the transponder for the application of the UHF RFID systems.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"716 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123844930","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: 16
A novel reflector shaping technique for hybrid antennas 一种新型混合天线反射面整形技术
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606869
S.D. Liu, S.F. Liu, Y. Jiao, F. Zhang
{"title":"A novel reflector shaping technique for hybrid antennas","authors":"S.D. Liu, S.F. Liu, Y. Jiao, F. Zhang","doi":"10.1109/APMC.2005.1606869","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606869","url":null,"abstract":"A new reflector shaping technique to improve the beam scanning capability of hybrid antennas (i.e. a reflector system illuminated by a phased array) is presented. Errors between the desired scan directions and the outgoing rays' directions in the scanning range are minimized by adjusting the reflector shape. This technique can be used to decrease the active element number of the feed array during the antenna scans, or reduce the gain loss caused by beam scanning when the number of active elements is given. An offset reflector antenna system is designed and analyzed, through which the validity of the technique given in this paper is demonstrated.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124030979","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
Medium access control protocols for wireless mobile ad hoc networks 无线移动自组织网络的介质访问控制协议
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1607042
Linna He
{"title":"Medium access control protocols for wireless mobile ad hoc networks","authors":"Linna He","doi":"10.1109/APMC.2005.1607042","DOIUrl":"https://doi.org/10.1109/APMC.2005.1607042","url":null,"abstract":"In this article, we study the performance of the medium access control (MAC) over wireless mobile ad hoc networks. The complexity in MAC design for wireless ad hoc networks arises due to node mobility, radio link vulnerability and the lack of central coordination. We briefly describe the MAC protocol for IEEE 802.11 WLAN in the ad hoc mode of operation. Some approaches to MAC design are presented.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121159289","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: 1
The 50MW S-band klystron development in IECAS 50MW s波段速调管在IECAS中的发展
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606474
Wang Yong, Ding Yao-gen, Liu Pu-kun, Xie Jing-xin
{"title":"The 50MW S-band klystron development in IECAS","authors":"Wang Yong, Ding Yao-gen, Liu Pu-kun, Xie Jing-xin","doi":"10.1109/APMC.2005.1606474","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606474","url":null,"abstract":"The Institute of Electronics, Chinese Academy of Sciences (IECAS) is developing the 50MW S-band klystron for use in linear accelerators. A klystron structure of six-cavity and single output window is adopted. The first prototype was fabricated and tested, and the test results show the design of electron optics and RF system is basically successfully. This paper describes the development and status of this device including design ideas, simulation results and recent progress.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121170914","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
Left-handed multilayer super compact bandpass filter 左旋多层超紧凑带通滤波器
2005 Asia-Pacific Microwave Conference Proceedings Pub Date : 2005-12-04 DOI: 10.1109/APMC.2005.1606734
W. Tong, Z.R. Hu
{"title":"Left-handed multilayer super compact bandpass filter","authors":"W. Tong, Z.R. Hu","doi":"10.1109/APMC.2005.1606734","DOIUrl":"https://doi.org/10.1109/APMC.2005.1606734","url":null,"abstract":"A left-handed multilayer super compact bandpass filter is proposed and demonstrated by means of full wave electromagnetic simulation and equivalent circuit analysis. The left-handed filter has a centre frequency of 1.35 GHz and 28% fractional bandwidth with passband insertion loss less than 0.3dB and return loss better than 13 dB. The size of the filter is about 1 mm/sup 2/. At such frequency range, the same filter using conventional technology has the size at lease around a few square centimetres. Space saving in the order of two to three has been achieved. In addition, this report demonstrates that a step improvement in miniaturisation of RF/microwave components can be achieved using the proposed multilayer left-handed metamaterials.","PeriodicalId":253574,"journal":{"name":"2005 Asia-Pacific Microwave Conference Proceedings","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121292483","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: 3
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