公开(公告)号：US20080049864A1

公开(公告)日：2008-02-28

申请号：US11843467

申请日：2007-08-22

申请人： Stefan G. Eriksson ,  Marten Sundberg

发明人： Stefan G. Eriksson ,  Marten Sundberg

IPC分类号： H04L27/04 ,  H04L5/12

CPC分类号： H04L27/2624 ,  H04L25/03834 ,  H04L27/3411

摘要： A method and associated apparatus for preserving frequency spectrum in a linear modulation scheme, by adding a compensation signal to a modulated signal, the compensation signal having the same spectrum as the modulated signal. In the present invention, peaks above a pre-determined maximum threshold and/or minima below a pre-determined minimum threshold are searched. When a peak is found, the amount by which the signal peak exceeds the maximum threshold, as well as the signal phase at the peak is calculated. A compensation signal is generated with the same peak amplitude as the signal exceeds the maximum threshold, and with opposite phase. Then the shape of the compensation signal is chosen to be the same as the transmitter pulse of the modulated signal. Finally, the compensation signal is added to the modulated signal.

摘要翻译： 一种用于在线性调制方案中保存频谱的方法和相关装置，通过向调制信号添加补偿信号，补偿信号具有与调制信号相同的频谱。 在本发明中，搜索高于预定最大阈值和/或低于预定最小阈值的最小值的峰值。 当发现峰值时，计算信号峰值超过最大阈值的量以及峰值处的信号相位。 产生具有与信号超过最大阈值相同的峰值幅度并且具有相反相位的补偿信号。 然后选择补偿信号的形状与调制信号的发射机脉冲相同。 最后，将补偿信号加到调制信号上。

公开(公告)号：US4591867A

公开(公告)日：1986-05-27

申请号：US579016

申请日：1984-02-10

申请人： Allan H. E. Englund ,  Stefan G. Eriksson

发明人： Allan H. E. Englund ,  Stefan G. Eriksson

IPC分类号： H01Q1/52

CPC分类号： H01Q1/525

摘要： Attenuating apparatus is provided for reducing disturbance between transmitting and receiving aerials mounted vertically one above the other. Attenuation is achieved by a grounded screen (1) and a spacer, both mounted between the aerials. The screen is provided with cutouts (6) having a pitch (c) of .lambda./2, where .lambda. is the mean frequency of the pertinent frequency band and .lambda./4 is the depth (d) of the cutouts. The length of the spacer is 0.70.lambda..

摘要翻译： 提供衰减装置，用于减少垂直安装在一起的发射和接收天线之间的干扰。 衰减通过接地的屏幕（1）和间隔件实现，两者均安装在天线之间。 屏幕设有具有λ/ 2的间距（c）的切口（6），其中λ是相关频带的平均频率，λ/ 4是切口的深度（d）。 间隔物的长度为0.70λ。

公开(公告)号：US06608600B2

公开(公告)日：2003-08-19

申请号：US10022682

申请日：2001-12-17

申请人： Stefan G. Eriksson

发明人： Stefan G. Eriksson

IPC分类号： H01Q2126

CPC分类号： H01Q1/246 ,  H01Q9/16 ,  H01Q21/24

摘要： An antenna system comprising a plurality of dipole elements formed from a single piece of material. The plurality of dipole elements is attached to a reflector plate with a single supporting base and forms horizontally or vertically stacked radiation elements. Tabs located between the center of the single piece and legs of the dipole elements and are bent at an angle to form a symmetrical axis in the center of slots separating the plurality of dipole elements to attenuate the radiation caused by current flowing around the slots. The plurality of dipole elements are selected to achieve different radiation patterns and can be formed into different shapes to achieve different lobe shapes.

公开(公告)号：US06229496B1

公开(公告)日：2001-05-08

申请号：US09566418

申请日：2000-05-05

申请人： Stefan G. Eriksson

发明人： Stefan G. Eriksson

IPC分类号： H01Q928

CPC分类号： H01Q21/08 ,  H01Q1/246 ,  H01Q9/28 ,  H01Q19/108

摘要： An antenna system comprising a plurality of dipole elements and a single support formed from a single piece of material. The plurality of dipole elements is attached to a reflector plate and forms horizontally or vertically stacked radiation elements. Tabs centrally located between the support and the dipole elements are bent at an angle to form a symmetrical axis in the center of a slot formed by the plurality of dipole elements to attenuate the radiation caused by current flowing around the slot. The plurality of dipole elements are selected to achieve different radiation patterns and can be formed into different shapes to achieve different lobe shapes.

摘要翻译： 一种天线系统，包括多个偶极元件和由单片材料形成的单个支架。 多个偶极子元件附接到反射板并形成水平或垂直堆叠的辐射元件。 中心位于支撑体和偶极子元件之间的突片以一定角度弯曲，以在由多个偶极子元件形成的槽的中心处形成对称的轴线，以衰减由流过槽的电流引起的辐射。 选择多个偶极元件以实现不同的辐射图案，并且可以形成为不同的形状以实现不同的凸角形状。