EP1032074A1 - Antenne à tilt réglable - Google Patents
Antenne à tilt réglable Download PDFInfo
- Publication number
- EP1032074A1 EP1032074A1 EP00430009A EP00430009A EP1032074A1 EP 1032074 A1 EP1032074 A1 EP 1032074A1 EP 00430009 A EP00430009 A EP 00430009A EP 00430009 A EP00430009 A EP 00430009A EP 1032074 A1 EP1032074 A1 EP 1032074A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- phase
- phase shift
- control
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
- H01Q3/38—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital
- H01Q3/385—Scan control logics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/005—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using remotely controlled antenna positioning or scanning
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
- H01Q3/38—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital
Definitions
- the subject of the present invention is, in the field of antennas for terrestrial cellular radio networks, a method adjustment by remote control of the tilt of the diagram radiation, with respect to the horizontal, of the antennas of a radio station based.
- the invention also relates to an antenna equipped with means tilt adjustment system and a remote tilt control system.
- One of the problems faced by cellular network operators when optimizing their network, is linked to monitoring coverage radio offered by each base station.
- One of the means used to adjust this coverage consists in modifying the tilt (inclination of the radiation pattern with respect to the horizontal) of the antenna for reduce (or sometimes increase) the range of a base station; the modification of the tilt is also used to reduce the interference caused by a base station serving a remote cell, in which the same spectral resources are used, in order to increase the capacity of the network.
- US Patent 4,249,181 describes a radiotelephone system cellular mobile, in which radio frequencies are assigned to cells arranged adjacent to form a network covering an area of service; at least one directional antenna system is provided in each cell; an antenna has several collinear dipoles powered in phase; in order to tilt the axis of a lobe of the diagram radiation of the antenna in a vertical plane, below the horizontal, the antenna is fixed to a mast by means of a mechanical support inclined, fixed or adjustable, in order to increase the effectiveness of the cover of the cell served by the antenna (compared to the case where the axis is horizontal).
- Adjusting the tilt by adjusting a mechanical antenna support requires an on-site intervention which is expensive. It is further impossible with this system to precisely adjust the coverage of a cell without increasing the number of interventions on site.
- Such a mechanical device for adjusting the inclination of the antenna also has the disadvantage of distorting the radiation of the antenna in the horizontal plane.
- the lengths of the electrical paths at the frequency of are such that when the moving part is in position median, they cause a progressive phase shift between the elements radiant resulting in an inclination of the radiation pattern of 7 about degrees below the horizontal; this inclination is adjustable between 0 and 14 degrees by displacement of the moving part (by the motor), which changes the length of the electrical paths, and therefore the phase relative of the signals delivered to the radiating elements.
- This electromechanical phase shift device is intended to allow to remotely control the inclination of the radiation pattern, in particular depending on the variation in intensity of demand during the period weekend or vacation; this system presents some disadvantages: it does not allow a rapid variation of the phase shift; in moreover, its reliability is limited by that of the electromechanical mechanism of modification of the length of the electrical paths.
- An objective pursued by the invention is to propose a device for variation of the inclination of the radiation pattern of such antenna, which can be remotely controlled, which is improved and partially remedies at least the drawbacks of known devices.
- the static phase shifting circuit is preferably constituted by a network of fixed phase-shifting elements which are each associated with a diode (or a radio frequency relay) for switching the phase shifter element, the conduction of the diodes (respectively the closing of the relays) being able to be controlled by a digital control signal applied to the circuit phase shifter; the circuit preferably includes switching diodes PIN type.
- the invention thus provides a very simple, precise, very reliable device, compact and inexpensive, easy to control remotely, and which allows vary the inclination of the radiation pattern of an antenna by less than 1 microsecond, especially when using diodes, including the very short switching time can be of the order of 10 to 100 nanoseconds.
- the device according to the invention also causes little distortion of the radiation pattern in a horizontal plane.
- the possibility of adjusting the tilt of the antenna using a device electronic allows, on cellular networks with multiple access by time distribution (GSM type), to control the inclination of the radiation pattern for each time interval (frame), by variation of the inclination at a frequency equal to the inverse of the duration of the TDMA frame, therefore mobile terminal by mobile terminal, according to received level or quality information at the radio interface.
- GSM type time distribution
- the tilt adjustment for each call in progress can be used in additional power control to adjust the level of the useful signal and to reduce the level of an interfering signal located in the opening of the antenna.
- An electronic device for phase shifting of elementary antennas is integrated inside each antenna.
- the control of this device adjusts the tilt of the antenna.
- a operator can adjust this tilt without special intervention on the antenna.
- measurements made on the network show that this tilt must be modified to reduce interference or to change coverage radio, it is again possible to modify the tilt without cost additional.
- Cellular network antennas are used most of the time in duplex mode (transmission and reception on the same antenna); the device electronic provides identical electrical tilt on the track rising and falling.
- the electronic device integrated in the protection radome the antenna is therefore essentially composed of phase shifters whose signals can be transmitted by a coaxial cable carrying the radio frequency signals to be transmitted. Because the order is made under digital form, it is possible to integrate the command in the cellular network equipment, after the use of the antenna.
- the invention consists of a method of control of a plurality of antennas according to the invention in which one delivers to each antenna a digital signal for controlling the means electronic phase shift.
- FIG. 1 illustrates a phase shift cell of an antenna according to the invention.
- Figure 2 illustrates the use of the phase shift cell in Figure 1, which is inserted into the feed circuit of a four-wire antenna dipoles.
- Figure 4 is a graph illustrating the variation of the power of two output signals of a phase shift cell as a function of a signal phase shift control applied to this cell.
- the electronic phase shifting means according to the invention make it possible to distribute the power (radiofrequency signals) delivered to the input (E) of the antenna 9 by a cable 13 to each of the radiating elements 5 to 8 (half-length dipole of wave in the case of an ATR antenna). This distribution is made using elementary phase shift cells 1 (FIG. 1).
- Each output S1, S2 of the two couplers respectively equipping the two phase shifters 1b, 1c, is connected to two radiating elements of antenna 9.
- coaxial cable 13 which connects the antenna at the base station, all the electronics integrated into the antenna.
- modem 11 can be connected to coaxial cable 13 to transmit the remote control information of the phase shifters delivered by a cellular network operation control device.
- Each phase shifter 3 can be made up of a network of fixed elements switchable by diodes (or radio frequency relays) controlled digitally; such phase shifters are offered in particular by General Microwave Corp., Amityville, N.Y., U.S.A., and / or Narda Microwave, N.Y., U.S.A.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
Description
- un élément de couplage d'entrée ;
- une partie mobile de couplage dont une extrémité montée pivotante est couplée électromagnétiquement à l'élément de couplage d'entrée ;
- une portion de ligne de transmission semi-circulaire qui est couplée à une deuxième extrémité de la partie mobile ;
- un mécanisme d'entraínement de la partie mobile qui comporte un moteur électrique commandable et contrôlable à distance.
- le signal numérique de commande est transmis par un câble coaxial de transport des signaux radiofréquence ;
- la valeur d'inclinaison est ajustée périodiquement ;
- on commande par ledit signal numérique une variation de l'inclinaison du diagramme à une fréquence égale à l'inverse de la durée de la trame AMRT, afin de contrôler l'inclinaison du diagramme dans chaque période de trame, pour chaque terminal mobile de télécommunication desservi par l'antenne, en fonction d'informations de niveau ou de qualité du signal reçu par le terminal mobile.
- pour un déphasage nul : la puissance d'entrée se répartit entre 50 % sur S1 et 50 % sur S2,
- pour 90 degrés de déphasage : la puissance d'entrée se répartit entre 0 % sur S2 et 100 % sur S1.
Claims (11)
- Antenne (9) pour réseau de télécommunication cellulaire terrestre, comprenant des éléments rayonnants (5 à 8) et des moyens d'alimentation desdits éléments rayonnants en signaux radiofréquence, caractérisée en ce lesdits moyens d'alimentation comprennent des moyens électroniques de déphasage entre lesdits signaux, de façon à permettre de régler à distance l'inclinaison du diagramme de rayonnement dans un plan vertical.
- Antenne selon la revendication 1, dans laquelle les moyens électroniques de déphasage comportent une cellule (1, 1a, 1b, 1c) de déphasage comportant un circuit (3) déphaseur comportant plusieurs composants statiques de commutation d'un élément déphaseur fixe.
- Antenne selon la revendication 1, dans laquelle les moyens électroniques de déphasage comportent une cellule (1b, 1c) de déphasage associée à un groupe de quatre éléments rayonnants, ladite cellule comportant, successivement connectés en série dans le circuit d'alimentation desdits éléments rayonnants :un diviseur (2) par deux,un circuit (3) déphaseur connecté à une des deux sorties du diviseur pour délivrer en sortie un signal déphasé,un coupleur (4) à deux sorties (S1, S2) en quadrature, chaque sortie du coupleur étant connectée à deux éléments rayonnants.
- Antenne selon la revendication 3, dans laquelle le circuit déphaseur est constitué par un réseau d'éléments déphaseurs fixes à chacun desquels est associée une diode de commutation ou un relais radiofréquence.
- Antenne selon la revendication 4, dans laquelle les diodes sont de type PIN et ont une durée de commutation de l'ordre de 10 à 100 nanosecondes.
- Antenne selon l'une quelconque des revendications 2 à 5, dans laquelle chaque cellule de déphasage est connectée à un circuit (10) de commande numérique des cellules de l'antenne qui comporte un modem (11) permettant la commande à distance des moyens de déphasage.
- Antenne selon la revendication 6, dans laquelle le circuit (10) de commande numérique des cellules est relié à un dispositif de contrôle d'une pluralité d'antennes du réseau par un câble (13) servant également à transmettre lesdits signaux radiofréquence.
- Procédé de commande d'une pluralité d'antennes selon l'une quelconque des revendications 1 à 7, dans lequel on délivre à chaque antenne un signal numérique de commande des moyens électroniques de déphasage.
- Procédé selon la revendication 8, dans lequel le signal numérique de commande est transmis par un câble coaxial (13) de transport des signaux radiofréquence.
- Procédé selon l'une quelconque des revendications 8 ou 9, dans lequel la valeur d'inclinaison est ajustée périodiquement.
- Procédé de commande selon la revendication 8, dans lequel on commande par ledit signal numérique une variation de l'inclinaison du diagramme à une fréquence égale à l'inverse de la durée de la trame AMRT, afin de contrôler l'inclinaison du diagramme dans chaque période de trame, pour chaque terminal mobile de télécommunication desservi par l'antenne, en fonction d'informations de niveau ou de qualité du signal reçu par le terminal mobile.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9902587 | 1999-02-24 | ||
FR9902587A FR2790142A1 (fr) | 1999-02-24 | 1999-02-24 | Antenne a tilt reglable |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1032074A1 true EP1032074A1 (fr) | 2000-08-30 |
Family
ID=9542724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00430009A Withdrawn EP1032074A1 (fr) | 1999-02-24 | 2000-02-23 | Antenne à tilt réglable |
Country Status (4)
Country | Link |
---|---|
US (1) | US6366237B1 (fr) |
EP (1) | EP1032074A1 (fr) |
JP (1) | JP2000252735A (fr) |
FR (1) | FR2790142A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7427962B2 (en) | 2003-06-16 | 2008-09-23 | Andrew Corporation | Base station antenna rotation mechanism |
US7639196B2 (en) | 2001-07-10 | 2009-12-29 | Andrew Llc | Cellular antenna and systems and methods therefor |
US7899496B2 (en) | 2000-07-10 | 2011-03-01 | Andrew Llc | Cellular antenna |
US8018390B2 (en) | 2003-06-16 | 2011-09-13 | Andrew Llc | Cellular antenna and systems and methods therefor |
CN103155623A (zh) * | 2010-10-22 | 2013-06-12 | 瑞典爱立信有限公司 | 用于小区选择平衡的方法、计算机程序和计算机程序产品 |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6667714B1 (en) * | 2000-05-03 | 2003-12-23 | Lucent Technologies Inc. | Downtilt control for multiple antenna arrays |
KR20020041609A (ko) * | 2000-11-28 | 2002-06-03 | 김상기 | 무선통신 시스템에서 빔틸트 조절을 위한 위상 가변기 |
DE10104564C1 (de) * | 2001-02-01 | 2002-09-19 | Kathrein Werke Kg | Steuerungsvorrichtung zum Einstellen eines unterschiedlichen Absenkwinkels insbesondere von zu einer Basisstation gehörenden Mobilfunkantennen sowie eine zugehörige Antenne und Verfahren zur Veränderung eines Absenkwinkels |
GB0125349D0 (en) * | 2001-10-22 | 2001-12-12 | Qinetiq Ltd | Antenna system |
GB0311371D0 (en) * | 2003-05-17 | 2003-06-25 | Qinetiq Ltd | Phased array antenna system with adjustable electrical tilt |
PL378709A1 (pl) * | 2003-05-17 | 2006-05-15 | Quintel Technology Limited | Fazowany system antenowy o zmiennym nachyleniu elektrycznym |
DE10328590A1 (de) * | 2003-06-25 | 2005-01-20 | Siemens Ag | Funkfernbedienung zur Abgabe von Befehlen an ein fernbedienbares Gerät |
DE10347414A1 (de) * | 2003-10-13 | 2005-05-04 | Bosch Gmbh Robert | Elektronisch abstimmbarer Phasenschieber |
US7789936B2 (en) * | 2003-08-18 | 2010-09-07 | University Of Utah Research Foundation | Methods and systems for removing copper from ferrous scrap |
DE10338536A1 (de) * | 2003-08-19 | 2005-04-07 | Bircher Reglomat Ag | Verfahren zum Betreiben eines Radarsensors |
BRPI0318559B1 (pt) * | 2003-10-23 | 2018-09-18 | Pirelli & C Spa | método para configurar as características de irradiação de uma antena, antena com características de irradiação configuráveis, aparelho compreendendo uma antena, e, estação rádio base |
US7177667B2 (en) * | 2003-11-25 | 2007-02-13 | Kmw Inc. | Antenna remote control apparatus of mobile communication base station system |
US20050219133A1 (en) * | 2004-04-06 | 2005-10-06 | Elliot Robert D | Phase shifting network |
GB0425813D0 (en) * | 2004-11-24 | 2004-12-29 | Finglas Technologies Ltd | Remote control of antenna line device |
US7969378B2 (en) * | 2007-08-31 | 2011-06-28 | Allen-Vanguard Technologies Inc. | Radio antenna assembly |
GB2466584A (en) * | 2007-08-31 | 2010-06-30 | Allen Vanguard Technologies Inc | Radio antenna assembly and apparatus for controlling transmission and reception of RF signals |
US8027703B2 (en) * | 2009-02-11 | 2011-09-27 | Amphenol Corporation | Multi-beam antenna with multi-device control unit |
US8831684B2 (en) * | 2010-11-22 | 2014-09-09 | Kathrein-Werke Kg | Base transceiver station with radiation beam steering and active antenna |
US9294932B2 (en) * | 2011-07-21 | 2016-03-22 | Qualcomm Incorporated | Apparatus and method for wireless network enhancement via variable down tilt |
CN107302137A (zh) * | 2016-04-15 | 2017-10-27 | 安弗施无线射频系统(上海)有限公司 | 多远程电调装置、多频天线装置和双极化电调智能天线装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0443484A1 (fr) * | 1990-02-23 | 1991-08-28 | Alcatel Telspace | Liaison de puissance, protégée par redondance, pour signaux hyperfréquence |
EP0624919A1 (fr) * | 1992-12-01 | 1994-11-17 | Ntt Mobile Communications Network Inc. | Appareil a antenne multilobe |
WO1996014670A1 (fr) * | 1994-11-04 | 1996-05-17 | Deltec New Zealand Limited | Systeme de commande d'antenne |
WO1998021779A1 (fr) * | 1996-11-13 | 1998-05-22 | Allen Telecom Inc. | Antenne a commande electrique de l'inclinaison du faisceau |
US5818385A (en) * | 1994-06-10 | 1998-10-06 | Bartholomew; Darin E. | Antenna system and method |
WO1998048472A1 (fr) * | 1997-04-18 | 1998-10-29 | Telefonaktiebolaget Lm Ericsson | Procede d'amelioration des parametres de performances d'une antenne et systeme antenne |
WO1999065262A2 (fr) * | 1998-06-10 | 1999-12-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Procede et systeme d'inclinaison vers le bas du diagramme d'antenne de la station de base |
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US4249181A (en) | 1979-03-08 | 1981-02-03 | Bell Telephone Laboratories, Incorporated | Cellular mobile radiotelephone system using tilted antenna radiation patterns |
GB2281012B (en) * | 1993-08-12 | 1998-04-15 | Northern Telecom Ltd | Angle diversity for multiple beam antenna |
GB2281176B (en) * | 1993-08-12 | 1998-04-08 | Northern Telecom Ltd | Base station antenna arrangement |
DE69431583T2 (de) * | 1993-08-12 | 2003-03-06 | Nortel Networks Ltd., St.Laurent | Antenneneinrichtung für Basisstation |
GB2281011B (en) * | 1993-08-12 | 1998-04-08 | Northern Telecom Ltd | Base station antenna arrangement |
GB2281175B (en) * | 1993-08-12 | 1998-04-08 | Northern Telecom Ltd | Base station antenna arrangement |
GB2281007B (en) * | 1993-08-12 | 1998-04-15 | Northern Telecom Ltd | Base station antenna arrangement |
GB2281009B (en) * | 1993-08-12 | 1998-04-08 | Northern Telecom Ltd | Base station antenna arrangement |
JP2626514B2 (ja) * | 1993-11-08 | 1997-07-02 | 日本電気株式会社 | 基地局送受信装置 |
-
1999
- 1999-02-24 FR FR9902587A patent/FR2790142A1/fr active Pending
- 1999-05-04 US US09/304,385 patent/US6366237B1/en not_active Expired - Fee Related
-
2000
- 2000-02-23 EP EP00430009A patent/EP1032074A1/fr not_active Withdrawn
- 2000-02-23 JP JP2000046379A patent/JP2000252735A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0443484A1 (fr) * | 1990-02-23 | 1991-08-28 | Alcatel Telspace | Liaison de puissance, protégée par redondance, pour signaux hyperfréquence |
EP0624919A1 (fr) * | 1992-12-01 | 1994-11-17 | Ntt Mobile Communications Network Inc. | Appareil a antenne multilobe |
US5818385A (en) * | 1994-06-10 | 1998-10-06 | Bartholomew; Darin E. | Antenna system and method |
WO1996014670A1 (fr) * | 1994-11-04 | 1996-05-17 | Deltec New Zealand Limited | Systeme de commande d'antenne |
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US7899496B2 (en) | 2000-07-10 | 2011-03-01 | Andrew Llc | Cellular antenna |
US7986973B2 (en) | 2000-07-10 | 2011-07-26 | Andrew Llc | Cellular antenna |
US7639196B2 (en) | 2001-07-10 | 2009-12-29 | Andrew Llc | Cellular antenna and systems and methods therefor |
US7427962B2 (en) | 2003-06-16 | 2008-09-23 | Andrew Corporation | Base station antenna rotation mechanism |
US8018390B2 (en) | 2003-06-16 | 2011-09-13 | Andrew Llc | Cellular antenna and systems and methods therefor |
CN103155623A (zh) * | 2010-10-22 | 2013-06-12 | 瑞典爱立信有限公司 | 用于小区选择平衡的方法、计算机程序和计算机程序产品 |
Also Published As
Publication number | Publication date |
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FR2790142A1 (fr) | 2000-08-25 |
US6366237B1 (en) | 2002-04-02 |
JP2000252735A (ja) | 2000-09-14 |
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