Angel Technologies Corporation and its partners (including Raytheon Systems Company) have committed significant resources to date to pioneering broadband wireless millimeter wavelength (MMW) services from piloted High Altitude Long Operation (HALO) aircraft. Scaled Composites in Mojave, California, a subsidiary of Wyman Gordon, is flight testing the HALO/Proteus "proof of concept" airplane of full scale, and its sister company, Scaled Technology Works in Montrose, Colorado will type certify the airplane through the FAA and will be the series producer of the airplane. Angel and Raytheon demonstrated a symmetric 51.8 Mbps link from a rooftop, tracking antenna to a general aviation airplane in flight at a slant range of about 25 miles, through which the data services highlighted in this paper were delivered. The HALO airplane will be the central node of a wireless broadband communications network with a star topology, the HALO Network, whose initial capacity will be on the scale of 10 Gbps, with a growth potential beyond 100 Gbps. The packet-switched network will be designed to offer bit rates to each subscriber in the multi-megabit per second range. Raytheon and Angel conducted a demonstration of the first commercial wireless broadband link from ground to a moving aircraft, a 50 mile round trip connection of 52 Mbps (OC-l rate). The following services were demonstrated over this wireless link: T1 access, ISDN access, Web browsing, high-resolution videoconferencing, large file transfers, and Ethernet LAN bridging.
{"title":"High-speed Internet access via stratospheric HALO aircraft","authors":"J.N. Martin, N. Colella","doi":"10.1109/ETS.2000.916527","DOIUrl":"https://doi.org/10.1109/ETS.2000.916527","url":null,"abstract":"Angel Technologies Corporation and its partners (including Raytheon Systems Company) have committed significant resources to date to pioneering broadband wireless millimeter wavelength (MMW) services from piloted High Altitude Long Operation (HALO) aircraft. Scaled Composites in Mojave, California, a subsidiary of Wyman Gordon, is flight testing the HALO/Proteus \"proof of concept\" airplane of full scale, and its sister company, Scaled Technology Works in Montrose, Colorado will type certify the airplane through the FAA and will be the series producer of the airplane. Angel and Raytheon demonstrated a symmetric 51.8 Mbps link from a rooftop, tracking antenna to a general aviation airplane in flight at a slant range of about 25 miles, through which the data services highlighted in this paper were delivered. The HALO airplane will be the central node of a wireless broadband communications network with a star topology, the HALO Network, whose initial capacity will be on the scale of 10 Gbps, with a growth potential beyond 100 Gbps. The packet-switched network will be designed to offer bit rates to each subscriber in the multi-megabit per second range. Raytheon and Angel conducted a demonstration of the first commercial wireless broadband link from ground to a moving aircraft, a 50 mile round trip connection of 52 Mbps (OC-l rate). The following services were demonstrated over this wireless link: T1 access, ISDN access, Web browsing, high-resolution videoconferencing, large file transfers, and Ethernet LAN bridging.","PeriodicalId":291027,"journal":{"name":"2000 IEEE Emerging Technologies Symposium on Broadband, Wireless Internet Access. Digest of Papers (Cat. No.00EX414)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133183841","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}
J. Ehmke, J. Brank, A. Malczewski, B. Pillans, S. Eshelman, J. Yao, C. Goldsmith
The design, fabrication, and behavior of a microelectromechanical (MEM) capacitive membrane microwave switching device is described. The switching element consists of a thin metallic membrane, which has two states, actuated or unactuated, depending on the applied bias. A microwave signal is switched on and off when the membrane is switched between the two states. The devices are electrostatically actuated and are therefore ultra low power. They also have very linear behavior with extremely low signal distortion. The switches show a very low insertion loss of 0.07 dB and an isolation of 35 dB at 40 GHz. A variety of RF phase shifters and tuning circuits have been fabricated using these switches and show world-class RF loss behavior. These devices offer the potential for building a new generation of low-loss high-linearity microwave circuits for a variety of phased antenna arrays for radar and communications applications.
{"title":"RF MEMS devices: a brave new world for RF technology","authors":"J. Ehmke, J. Brank, A. Malczewski, B. Pillans, S. Eshelman, J. Yao, C. Goldsmith","doi":"10.1109/ETS.2000.916522","DOIUrl":"https://doi.org/10.1109/ETS.2000.916522","url":null,"abstract":"The design, fabrication, and behavior of a microelectromechanical (MEM) capacitive membrane microwave switching device is described. The switching element consists of a thin metallic membrane, which has two states, actuated or unactuated, depending on the applied bias. A microwave signal is switched on and off when the membrane is switched between the two states. The devices are electrostatically actuated and are therefore ultra low power. They also have very linear behavior with extremely low signal distortion. The switches show a very low insertion loss of 0.07 dB and an isolation of 35 dB at 40 GHz. A variety of RF phase shifters and tuning circuits have been fabricated using these switches and show world-class RF loss behavior. These devices offer the potential for building a new generation of low-loss high-linearity microwave circuits for a variety of phased antenna arrays for radar and communications applications.","PeriodicalId":291027,"journal":{"name":"2000 IEEE Emerging Technologies Symposium on Broadband, Wireless Internet Access. Digest of Papers (Cat. No.00EX414)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134604829","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}
This paper expands upon the design features of an LMDS (Local Multipoint Distribution System) PMYTO (permanent magnet YIG-tuned oscillator) based synthesizer that operates from 25.88 to 27.05 GHz. The synthesizer presented has undergone extensive field trials and is in full rate production today as a local oscillator (LO) for the LMDS infrastructure.
{"title":"Permanent magnet YIG tuned oscillator based synthesizer for LMDS LO applications","authors":"E.J. Nyiri, P.A. Jobson, B. W. Scott","doi":"10.1109/ETS.2000.916534","DOIUrl":"https://doi.org/10.1109/ETS.2000.916534","url":null,"abstract":"This paper expands upon the design features of an LMDS (Local Multipoint Distribution System) PMYTO (permanent magnet YIG-tuned oscillator) based synthesizer that operates from 25.88 to 27.05 GHz. The synthesizer presented has undergone extensive field trials and is in full rate production today as a local oscillator (LO) for the LMDS infrastructure.","PeriodicalId":291027,"journal":{"name":"2000 IEEE Emerging Technologies Symposium on Broadband, Wireless Internet Access. Digest of Papers (Cat. No.00EX414)","volume":"352 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115896384","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}
Mobile positioning technology has become an important area of research, for emergency as well as for commercial services. The handset-based enhanced observed time difference of arrival (E-OTD) location technology is one of the methods that has been standardized for mobile positioning in GSM-based networks. This paper describes the functionality of a software tool that is being used to analyze E-OTD positioning accuracy through simulation.
{"title":"GSM mobile positioning simulator","authors":"M. Wylie-Green, P. Wang","doi":"10.1109/ETS.2000.916519","DOIUrl":"https://doi.org/10.1109/ETS.2000.916519","url":null,"abstract":"Mobile positioning technology has become an important area of research, for emergency as well as for commercial services. The handset-based enhanced observed time difference of arrival (E-OTD) location technology is one of the methods that has been standardized for mobile positioning in GSM-based networks. This paper describes the functionality of a software tool that is being used to analyze E-OTD positioning accuracy through simulation.","PeriodicalId":291027,"journal":{"name":"2000 IEEE Emerging Technologies Symposium on Broadband, Wireless Internet Access. Digest of Papers (Cat. No.00EX414)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126943864","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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