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公开(公告)号：US4516270A
公开(公告)日：1985-05-07
申请号：US471418
申请日：1983-03-02
申请人： James P. Phillips
发明人： James P. Phillips
CPC分类号： H04B1/26
摘要： The invention is a high frequency hetrodyne receiver front end for receiving a communications signal comprising a desired information frequency and an undesired image frequency. The receiver comprises a bandpass filter, a preamplifier responsive to the bandpass filter, a mixer and a coupler means between the preamplifier and the bandpass filter. The coupler means defines a reactive short at the undesired image frequency due to impedance characteristics of the coupler means. The coupler means thereby eliminates the image frequency noise at the input of the preamplifier. Preferrably the coupler means is a transmission line of a length L where L equals .eta..pi./.beta. and .eta. is an integer and .beta. is proportional to the wavelength of the image frequency.
摘要翻译： 本发明是一种用于接收包含期望的信息频率和不期望的图像频率的通信信号的高频耳机接收器前端。 接收机包括带通滤波器，响应带通滤波器的前置放大器，前置放大器和带通滤波器之间的混频器和耦合器装置。 耦合器装置由于耦合器装置的阻抗特性而限定了不需要的图像频率的电抗性短路。 耦合器装置从而消除了在前置放大器的输入处的图像频率噪声。 耦合器装置优选是长度L的传输线，其中L等于eta pi /β，eta是整数，β与图像频率的波长成比例。
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公开(公告)号：US07839339B2
公开(公告)日：2010-11-23
申请号：US12433983
申请日：2009-05-01
CPC分类号： H01Q9/0428
摘要： A circular polarized signal receiving antenna includes an active element having first and second ends separated by a gap. A dimension of the active element between the first and second ends thereof corresponds to approximately one wavelength of a resonant operating frequency of the antenna. A feed-point is coupled to the active element, wherein the feed-point is located approximately one-quarter of the wavelength from the first end of the active element and approximately three-quarters of the wavelength from the second end of the active element. In one embodiment, the feed-point is coupled to the active element.
摘要翻译： 圆偏振信号接收天线包括具有由间隙分开的第一和第二端的有源元件。 有源元件在其第一端和第二端之间的尺寸对应于天线的谐振工作频率的近似一个波长。 馈电点耦合到有源元件，其中馈电点位于离有源元件的第一端大约四分之一波长的距离处，并且距离有源元件的第二端的波长大约是四分之三。 在一个实施例中，馈电点耦合到有源元件。
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公开(公告)号：US07292195B2
公开(公告)日：2007-11-06
申请号：US11189689
申请日：2005-07-26
IPC分类号： H01Q11/12
摘要： An energy density diversity antenna (EDA) has a least a pair of antenna elements, whose feeding points are connected to outputs of a hybrid coupler configured such that a sum and a difference signal may exist at the feed points of the antenna elements. First reactive elements are respectively inserted in the antenna elements proximal the respective feed points. The antenna elements are joined at a point distal from the feed points by a second reactive element, and a third reactive element is coupled between feed lines coupled to the feed points at a location between the feed points and the outputs of the hybrid coupler.
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公开(公告)号：US06600450B1
公开(公告)日：2003-07-29
申请号：US10091666
申请日：2002-03-05
IPC分类号： H01Q2100
摘要： A balanced antenna system for a communication device includes a balanced transmission line electromagnetically coupled to a transceiver of the device. A symmetrical dipole antenna element is operable at a first frequency driven by the balanced transmission line. A symmetrical loop antenna shares portions of the dipole antenna element and is operable at a second frequency driven by the transmission line. Preferably, the antenna system is disposed within a flip portion of the device housing.
摘要翻译： 用于通信设备的平衡天线系统包括电磁耦合到设备的收发器的平衡传输线。 对称偶极天线元件可由平衡传输线驱动的第一频率操作。 对称环形天线共享偶极天线元件的部分，并且可以由传输线驱动的第二频率操作。 优选地，天线系统设置在装置壳体的翻转部分内。
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公开(公告)号：US4672685A
公开(公告)日：1987-06-09
申请号：US816011
申请日：1986-01-03
摘要： This dual input antenna system has a first input which provides an impedance match over a first range of frequencies and a second input which provides an impedance match over a second range of frequencies. This effectively enables a narrow band antenna to operate and provide a matched condition at two separate frequency ranges. First and second longitudinal radiating elements are connected at respective ends by an approximate 1/2 wavelength transmission line. The other end of each radiating element is connected by transmission lines to a receive filter and transmit filter, respectively. The receive and transmit filters provide a substantial reactance outside of the respective passbands. The wavelengths of the first and second transmission lines are selected to transform the reactance of each filter into a value which will provide a match condition for the other transmission line at the respective frequency ranges.
摘要翻译： 该双输入天线系统具有在第一频率范围内提供阻抗匹配的第一输入和在第二频率范围上提供阻抗匹配的第二输入。 这有效地使窄带天线工作，并在两个分开的频率范围内提供匹配条件。 第一和第二纵向辐射元件在各自的端部连接大约1/2波长的传输线。 每个辐射元件的另一端分别通过传输线连接到接收滤波器和发射滤波器。 接收和发射滤波器在相应的通带之外提供实质的电抗。 选择第一和第二传输线的波长以将每个滤波器的电抗变换成将为相应频率范围内的另一传输线提供匹配条件的值。
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公开(公告)号：US4571595A
公开(公告)日：1986-02-18
申请号：US558270
申请日：1983-12-05
摘要： A dual band antenna for a radio transceiver includes an inductively loaded conductor of a predetermined length with feedpoint located substantially central of the conductor. Radiator elements terminate the ends of the conductor and a ground plane terminates the radiator elements. An adjustable balanced impedance matching circuit is coupled to the feedpoint. Dual banding elements couple to the impedance matching circuit with a high Q, parallel resonant circuit element. Input and output circuits are also coupled to the dual banding elements. The design minimizes the effect on the antenna operation by the proximity of the user's hands and head since the high impedance portion of the antenna is confined to the center thereof.
摘要翻译： 用于无线电收发器的双频带天线包括具有预定长度的感应负载导体，馈电点基本位于导体的中心。 散热器元件终止导体的端部，接地平面终止散热器元件。 可调平衡阻抗匹配电路耦合到馈电点。 双带元件耦合到具有高Q，并联谐振电路元件的阻抗匹配电路。 输入和输出电路也耦合到双带元件。 由于天线的高阻抗部分被限制在其中心，所以该设计通过用户的手和头部的接近来最小化对天线操作的影响。
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公开(公告)号：US20100182119A1
公开(公告)日：2010-07-22
申请号：US12726747
申请日：2010-03-18
申请人： James P. Phillips
发明人： James P. Phillips
CPC分类号： H01B5/08 , B82Y10/00 , D07B1/147 , H01F17/0006 , H01F27/2823 , H01F27/34 , H01Q1/368 , H03H7/38 , H05B2214/04 , Y10T29/49117
摘要： An upper frequency-range circuit (160) includes a load element (168) exhibiting a capacitive load impedance. A first matching network (166) includes at least one nano-scale Litz wire (100) inductor. The first matching network (166) exhibits an inductive impedance that nominally matches the capacitive load impedance. An electrical conductor for providing connections for radio-frequency signals includes a plurality of nano-scale conductors (120) that are arranged in the form of a Litz wire (100). In one method of making a Litz wire (142), a plurality of carbon nanotubes (144) is placed on a substrate (146). The carbon nanotubes (144) are woven according to a predefined scheme so as to form a Litz wire (142). An inductor may be formed by manipulating the Litz wire (100) to form a coil (150).
摘要翻译： 上频率范围电路（160）包括呈现电容性负载阻抗的负载元件（168）。 第一匹配网络（166）包括至少一个纳米尺寸的利兹线（100）电感器。 第一匹配网络（166）表现出名义上匹配容性负载阻抗的电感阻抗。 用于提供用于射频信号的连接的电导体包括以莱茨线（100）形式布置的多个纳米级导体（120）。 在制造利兹线（142）的一种方法中，多个碳纳米管（144）被放置在基片（146）上。 根据预定义的方案编织碳纳米管（144）以便形成利兹丝（142）。 可以通过操纵Litz线（100）以形成线圈（150）来形成电感器。
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公开(公告)号：US07709732B2
公开(公告)日：2010-05-04
申请号：US11609354
申请日：2006-12-12
申请人： James P. Phillips
发明人： James P. Phillips
IPC分类号： H01B11/04
CPC分类号： H01B5/08 , B82Y10/00 , D07B1/147 , H01F17/0006 , H01F27/2823 , H01F27/34 , H01Q1/368 , H03H7/38 , H05B2214/04 , Y10T29/49117
摘要： An upper frequency-range circuit (160) includes a load element (168) exhibiting a capacitive load impedance. A first matching network (166) includes at least one nano-scale Litz wire (100) inductor. The first matching network (166) exhibits an inductive reactance that nominally matches the capacitive load reactance. An electrical conductor for providing connections for radio-frequency signals includes a plurality of nano-scale conductors (120) that are arranged in the form of a Litz wire (100). In one method of making a Litz wire (142), a plurality of carbon nanotubes (144) is placed on a substrate (146). The carbon nanotubes (144) are woven according to a predefined scheme so as to form a Litz wire (142). An inductor may be formed by manipulating the Litz wire (100) to form a coil (150).
摘要翻译： 上频率范围电路（160）包括呈现电容性负载阻抗的负载元件（168）。 第一匹配网络（166）包括至少一个纳米尺寸的利兹线（100）电感器。 第一匹配网络（166）表现出名义上匹配容性负载电抗的感抗。 用于提供用于射频信号的连接的电导体包括以莱茨线（100）形式布置的多个纳米级导体（120）。 在制造利兹线（142）的一种方法中，多个碳纳米管（144）被放置在基片（146）上。 根据预定义的方案编织碳纳米管（144）以便形成利兹丝（142）。 可以通过操纵Litz线（100）以形成线圈（150）来形成电感器。
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公开(公告)号：US5572223A
公开(公告)日：1996-11-05
申请号：US307224
申请日：1994-09-16
CPC分类号： H01Q1/242 , H04B1/3833
摘要： A multi-position antenna apparatus is provided for a device including a first housing portion and a second housing portion which are interconnected such that they move relative to one another between a collapsed position and an extended position. The device includes radio circuitry positioned in the first housing portion. The antenna apparatus includes a first antenna supported in the second housing portion. The first antenna is coupled to the radio circuitry in the extended position and in the collapsed position. A parasitic radiator is supported in the first housing portion and is only coupled to the first antenna when the housing is in the collapsed position. The parasitic radiator is a quarter wavelength of the signaling frequency or an integer multiple thereof. The parasitic radiator may include a member inductively or capacitively coupled to the first antenna when the flap is closed. Alternatively, the parasitic radiator may be a patch radiator or a loop conductor. An end of the parasitic radiator may be connected to ground.
摘要翻译： 提供了一种用于包括第一壳体部分和第二壳体部分的装置的多位置天线装置，所述第一壳体部分和第二壳体部分互连，使得它们在折叠位置和延伸位置之间相对于彼此移动。 该设备包括位于第一壳体部分中的无线电电路。 天线装置包括支撑在第二壳体部分中的第一天线。 第一天线在延伸位置和折叠位置处耦合到无线电电路。 寄生散热器被支撑在第一壳体部分中，并且当壳体处于折叠位置时仅耦合到第一天线。 寄生散热器是信号频率的四分之一波长或其整数倍。 寄生辐射器可以包括当瓣片关闭时感应地或电容耦合到第一天线的部件。 或者，寄生散热器可以是贴片辐射器或环形导体。 寄生散热器的一端可以接地。
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公开(公告)号：US5014346A
公开(公告)日：1991-05-07
申请号：US140523
申请日：1988-01-04
摘要： A rotatable contactless RF signal coupler, which couples RF signals between an antenna and an RF signal processor in a portable radio, along with an antenna capable of operating in two modes is described herein. Specifically, the signal coupler includes a transformer that is primarily located within the hinge formed by the housing of the radio and a rotatable flip portion. Substantially constant inductive coupling is maintained in the coupler regardless of rotation. The antenna is capable of operating in a narrow band and a wide band mode to afford antenna operation through varied conditions.
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