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公开(公告)号：EP1568097A1
公开(公告)日：2005-08-31
申请号：EP02780602.5
申请日：2002-11-08
发明人： RUNYON, Donald, L.
IPC分类号： H01P1/18
CPC分类号： H01P5/04
摘要： A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phase shifter (110) and a hybrid power divider (115). The single-control phase shifter can comprise a three-port device having a single input port and two output ports. The single-control phase shifter can further comprise a variable adjuster that can change or adjust the phase between two RF signals. The hybrid power divider can comprise a four-port device having two input ports and two output ports. Both the single-control phase shifter and the hybrid power divider can comprise substantially planar structures that are suitable for high-speed manufacturing. The output ports of the hybrid power divider can be coupled to various devices such antennas or power absorbing elements.
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公开(公告)号：EP1509970A1
公开(公告)日：2005-03-02
申请号：EP02807452.4
申请日：2002-05-16
发明人： ZIMMERMAN, Kurt, Alan , WANN, John, Elliott , FREEMAN, Robert, Allen , BLACK, Donald, Nelson, Jr. , MARSIK, James, Charles
IPC分类号： H01Q19/06
摘要： An antenna comprising a feed (42) for delivering electromagnetic energy to a rotatable combination of a dielectric lens (44) and a reflective surface (46). The combination of the dielectric lens and the reflective surface is placed proximate to and in front of an energy feed, such as a horn (42), to support the scanning of an antenna beam in response to rotation of the lens/reflective surface assembly. The lens typically comprises a dielectric material and the reflective surface can comprise a thin layer of material operable to reflect electromagnetic energy. For example, the lens can comprise a half-cylinder shape of dielectric material and the reflective surface can be applied to the flat portion of the half-cylindrical lens. Alternatively, the antenna can comprise two or more electromagnetic feeds (72a, 72b, 72c, 72d) and a cylindrical lens of dielectric material including a centrally embedded, two-sided reflective surface. A positioning system can be used to rotate the combination of the lens and the reflective material proximate to and in front of the electromagnetic feed(s).
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63.发明公开
公开(公告)号：EP1444750A2
公开(公告)日：2004-08-11
申请号：EP02789475.7
申请日：2002-11-07
发明人： KROENING, Adam, M.
IPC分类号： H01P1/00
CPC分类号： H01P1/39
摘要： An improved multi-junction waveguide circulator that eliminates the transitions to dielectric transformers and air-filled waveguides between ferrite elements is described. The waveguide circulator in accordance with the invention can be implemented in variations from a minimum of two ferrite circulator elements held in close proximity to one another to any number of ferrite elements as required to achieve the desired isolation performance or to create a switch matrix with any combination of input and output ports. The waveguide circulator in accordance with the invention eliminates the transitions between adjacent ferrite elements and thus reduces losses, component size, and mass.
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64.发明授权OMNIDIRECTIONAL ANTENNA UTILIZING AN ASYMMETRICAL BICONE AS A PASSIVE FEED FOR A RADIATING ELEMENT 有权RUNDSTRHLENDE天线不对称双锥作为被动供电元件用于反射器元
公开(公告)号：EP1250728B1
公开(公告)日：2004-04-07
申请号：EP00984186.7
申请日：2000-12-11
IPC分类号： H01Q9/28
摘要： An antenna assembly comprising a radiating element which passively receives a signal fed by a vertically-stacked pair of asymmetrically-shaped, conductive cone elements mounted below the radiating element. The cone elements are centrally fed by a coaxial cable input at a common junction formed the apex of each cone element. This antenna assembly provides a low-profile antenna to transmit and receive radio frequency (RF) energy with high gain and desirable antenna patterns for data transmission in an in-building, wireless local area network. The antenna assembly can be mounted in a standard ceiling or wall-mounted enclosure, with the low-profile antenna extending beneath the surface of a conductive enclosure cover that serves as the ground plane for the antenna element. This configuration achieves high antenna gain with a downtilt-beam, omnidirectional radiation pattern, which is highly desirable in an in-building wireless local area network (WLAN) application.
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65.发明公开METHOD AND SYSTEM FOR PRODUCING DUAL POLARIZATION STATES WITH CONTROLLED RF BEAMWIDTHS 审中-公开方法和系统双极化受管制夫·比姆宽PRODUCTION
公开(公告)号：EP1360742A1
公开(公告)日：2003-11-12
申请号：EP01912807.3
申请日：2001-02-16
发明人： CARSON, James, C. , PHILLIPS, Sara
IPC分类号： H01Q9/04
CPC分类号： H01Q9/0464 , H01Q1/246 , H01Q9/0414
摘要： An antenna system can generate RF radiation fields having dual simultaneous polarization states and having substantially rotationally symmetric radiation patterns. The antenna system generates RF radiation patterns where the beamwidths of respective RF fields for respective radiating elements are substantially equal and are relatively large despite the compact, physical size of the antenna system. The antenna system can include one or more patch radiators and a non-resonant patch separated from each other by an air dielectric and by relatively small spacer elements. The patch radiators and non-resonant patch can have predefined shapes for increasing polarization discrimination. The lower patch radiators can be mounted to a printed circuit board that can include an RF feed network and a ground plane which defines a plurality of symmetrically, shaped slots. The slots within the ground plane of the printed circuit board can be excited by stubs that are part of the feed network of the printed circuit board. The slots, in turn, can establish a transverse magnetic mode of RF radiation in a cavity which is disposed adjacent to the ground plane of the printed circuit board and a ground plane of the antenna system. The feed network of the printed circuit board can be aligned with portions of the cavity such that the portions of the cavity function as a heat sink for absorbing or receiving thermal energy produced by the feed network.
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公开(公告)号：EP1353454A2
公开(公告)日：2003-10-15
申请号：EP03016070.9
申请日：2000-09-21
发明人： Sharon, Thomas E. , Taylor, Thomas S. , Hafner, William R. , Rigg, Steven H. , Howell, James M. , Glynn, Thomas W. , Kershner, Dennis L.
IPC分类号： H04B7/185
CPC分类号： H04B7/18584
摘要： A satellite communications system having ground user terminals, hubs, and a geosynchronous satellite. The satellite generates a network of spot beam coverage areas on the earth. A hub and at least one ground terminal are located in each of at least two spot beams. A first user terminal transmits an uplink signal according to a first signal protocol to the hub through the satellite. A second user terminal receives a downlink signal according to a second signal protocol through the downlink spot beam from the hub through the satellite. The hub may be located in the same spot beam coverage area as the first or the second user terminal or may be located in an altogether different spot beam coverage area. Through selective frequency and/or polarization routing on board the satellite, a hub located within a "parent" beam can communicate with user terminals within the parent beam at a specified frequency and polarization, and can communicate with users in other "dependent" beams on a different frequency and/or polarization. This routing allocates the total available bandwidth between parent and dependent beams. The system enables asynchronous communications between each hub and the satellite to maximize frequency re-use and the overall capacity of the system.
摘要翻译： 具有地面用户终端，集线器和地球同步卫星的卫星通信系统。 卫星在地球上产生一个点波束覆盖区域网络。 集线器和至少一个接地端子位于至少两个光束中的每一个中。 第一用户终端通过卫星向Hub发送根据第一信号协议的上行链路信号。 第二用户终端通过来自集线器的卫星的下行链路点波束根据第二信号协议接收下行链路信号。 集线器可以位于与第一或第二用户终端相同的点波束覆盖区域中，或者可以位于完全不同的点波束覆盖区域中。 通过卫星上的选择性频率和/或极化路由，位于“父”波束内的集线器可以以指定的频率和极化与主波束内的用户终端通信，并且可以与其他“依赖”波束上的用户通信 不同的频率和/或极化。 该路由分配父和相关波束之间的总可用带宽。 该系统使得每个集线器和卫星之间能够进行异步通信，从而最大限度地提高频率再利用和系统的整体容量。
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公开(公告)号：EP1247353A2
公开(公告)日：2002-10-09
申请号：EP00968379.8
申请日：2000-09-21
发明人： SHARON, Thomas, E. , TAYLOR, Thomas, S. , HAFNER, William, R. , RIGG, Steven, H. , HOWELL, James, M.
IPC分类号： H04B7/185
CPC分类号： H04B7/18584
摘要： A satellite communications system having ground user terminals, hubs, and a geosynchronous satellite. The satellite generates a network of spot beam coverage areas on the earth. A hub and at least one ground terminal are located in each of at least two spot beams. A first user terminal transmits an uplink signal according to a first signal protocol to the hub through the satellite. A second user terminal receives a downlink signal according to a second signal protocol through the downlink spot beam from the hub through the satellite. The hub may be located in the same spot beam coverage area as the first or the second user terminal or may be located in an altogether different spot beam coverage area. Through selective frequency and/or polarization routing on board the satellite, a hub located within a 'parent' beam can communicate with user terminals within the parent beam at a specified frequency and polarization, and can communicate with users in other 'dependent' beams on a different frequency and/or polarization. This routing allocates the total available bandwidth between parent and dependent beams. The system enables asynchronous communications between each hub and the satellite to maximize frequency re-use and the overall capacity of the system.
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公开(公告)号：EP1012909A1
公开(公告)日：2000-06-28
申请号：EP98936976.4
申请日：1998-07-24
CPC分类号： H01Q13/10 , H01Q21/005 , H01Q21/064
摘要： A waveguide-implemented antenna (10) comprising a planar array of waveguide slot radiators for communicating elctromagnetic signals exhibiting simultaneous dual polarization states. The antenna (10) can consist of parallel waveguides (12) of rectangular or ridged cross section. The broadwalls of each parallel waveguide contain a linear array (14) of input slots (50) for receiving (transmitting) electromagnetic signals having a first polarization state from (to) the parallel waveguide and for transmitting (receiving) those signals into (from) an array of cavity sections. The cavity sections comprise a short section of uniform waveguides with a length of much less than a wavelength in the propagation direction. The cavity sections (62) feed to output slots (60) which are rotated relative to the input slots (50); such that the output slots (60) exhibit a second polarization state, which they radiate (receive) to (from) free space. By interlacing parallel waveguides with alternating +45 degree and -45 degree rotations of the output slots, two independant antennas are formed exhibiting simultaneous dual polarizations.
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公开(公告)号：EP0390966B1
公开(公告)日：1997-03-19
申请号：EP89117066.4
申请日：1989-09-14
IPC分类号： H03K17/687 , H01P1/19
CPC分类号： H03K17/687 , H01P1/19
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70.发明授权Distributed planar array beam steering control with aircraft roll compensation 失效用于与飞机滚转补偿的平面阵列天线波束控制方案的分布式系统。
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