EP1344277A1 - Antenne, en particulier antenne radio mobile - Google Patents

Antenne, en particulier antenne radio mobile

Info

Publication number
EP1344277A1
EP1344277A1 EP01271671A EP01271671A EP1344277A1 EP 1344277 A1 EP1344277 A1 EP 1344277A1 EP 01271671 A EP01271671 A EP 01271671A EP 01271671 A EP01271671 A EP 01271671A EP 1344277 A1 EP1344277 A1 EP 1344277A1
Authority
EP
European Patent Office
Prior art keywords
reflector
dielectric body
distance
radiators
frequency range
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.)
Granted
Application number
EP01271671A
Other languages
German (de)
English (en)
Other versions
EP1344277B1 (fr
Inventor
Maximilian GÖTTL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kathrein SE
Original Assignee
Kathrein Werke KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kathrein Werke KG filed Critical Kathrein Werke KG
Publication of EP1344277A1 publication Critical patent/EP1344277A1/fr
Application granted granted Critical
Publication of EP1344277B1 publication Critical patent/EP1344277B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/028—Means for reducing undesirable effects for reducing the cross polarisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Definitions

  • Antenna especially cellular antenna
  • the invention relates to an antenna, in particular a mobile radio antenna, according to the preamble of claim 1.
  • Mobile radio antennas for mobile radio base stations are usually constructed in such a way that a plurality of radiator arrangements are provided in front of a reflector plane in the vertical direction one above the other.
  • These radiator arrangements can therefore consist of a multiplicity of dipole radiators, for example also in the form of cross dipoles, in the form of a dipole square etc., that is to say in the form of radiator types having a dipole structure.
  • Antennas are also known as so-called patch radiators.
  • different mobile radio frequency ranges are provided, for example for the so-called GSM 900 network of the 900 MHz frequency range, for the so-called GSM 1,800 network of the 1,800 MHz range or for example also the 1,900 MHz frequency range, as is customary in the USA and is used in a large number of other countries.
  • GSM 900 network of the 900 MHz frequency range for the so-called GSM 1,800 network of the 1,800 MHz range or for example also the 1,900 MHz frequency range, as is customary in the USA and is used in a large number of other countries.
  • the UMTS network For the next generation of mobile communications, namely the UMTS network, a frequency range around 2,000 MHz is seen.
  • Such mobile radio antennas at least as dual-band antennas, with triple-band antennas (for example for the 900 for the 1,800 and the 1,900 or for example the 2,000 MHz band) also being suitable.
  • the antennas are preferably designed as dual-polarized antennas for operation with a polarization of +45 'and -45'. It is also common to protect antennas of this type from weather influences using a plastic hood. However, this so-called radome primarily has to perform mechanical tasks and equally envelops all radiating antenna parts. Such an antenna for operation in at least two mutually offset frequency bands has become known, for example, from DE 198 23 749 AI.
  • two-band antennas or generally multi-band antennas however, the problem frequently arises that the half-widths of the radiation diagram in the azimuth direction are of different widths for the different frequency ranges, that is to say for the different frequency bands.
  • two-band or multi-band antennas generally have the problem that cross-polar components can arise which lead to a deterioration in the radiation characteristic.
  • the VSWR ratio and / or the decoupling can also be adversely affected.
  • a large number of antennas are known from the prior art, but only for a single one Frequency band range are designed, so can only receive and send in one frequency range.
  • These can be linearly polarized or also dual-polarized antennas for transmission only in this one frequency band mentioned.
  • Such antennas working only in one frequency band are known, for example, from the publications DE 199 01 179 AI, DE 198 21 223 AI, DE 196 27 015 C2, DE US 6,069,590 A and US 6,069,586 A.
  • all these prior publications deal 'with other types of problems, usually with the question of decoupling two polarizations in the same frequency band.
  • electrically conductive parts are usually used to produce parasitic radiation decoupling elements.
  • a dielectric body is provided in a cellular antenna known per se, which has at least one direction of extension parallel to the reflector plane, which is larger than its extension component running perpendicular to the reflector plane.
  • the dielectric body according to the invention is preferably designed in the form of a plate. It can be n-polygonal, especially in plan view, and can extend, for example, above a dipole emitter arrangement, for example a cross dipole, a dipole square or a patch emitter, the extension position preferably above the corresponding emitter elements for a higher frequency range and below the emitter elements - borrowed at least the lowest frequency range.
  • the dielectric body according to the invention which is also referred to below in part as a dielectric tuning plate, can be designed symmetrically in plan view, in particular have at least sections which are designed and arranged symmetrically with respect to a single radiator arrangement.
  • the dielectric bodies according to the invention can, for example, be made of a suitable plastic material, for example such as polystyrene, fiberglass (GRP), etc. exist.
  • a suitable plastic material for example such as polystyrene, fiberglass (GRP), etc. exist.
  • a material is preferably used for the dielectric body, the dielectric of which does not have a high loss factor.
  • the invention has a particularly favorable effect, for example in the frequency range from 800 to 1,000 MHz and from 1,700 to 2,200 MHz.
  • the dielectric body is preferably designed in the form of a plate and extends in a parallel plane in front of the reflector. However, it can be provided with fastening devices or feet (generally spacers, etc.) made of the same material in order to arrange it at a predetermined distance, which is deemed favorable, in front of the reflector plate.
  • the extension height is preferably lower than ⁇ / 2.
  • the mobile radio antennas are often set so that they have a half width of 65 '.
  • this 65 'half-value width cannot usually be set completely identically for the at least two frequency bands, especially if they are very broadband. Therefore, a deviation with respect to the at least two provided frequency bands of, for example, 65 '+ 10' (or at least +7 ') is common in the prior art. According to the invention, this deviation can now be improved to 65 "+ 5" (or even only +4 'and less).
  • the antennas are often adjusted so that they radiate at a horizontal 120 'sector angle. This is also called the sector.
  • a corresponding mobile radio antenna radiates in the sector boundaries at an angle of +60 'or -60', the suppression of the cross-polar component, especially at the sector boundaries according to the prior art, having poor values, especially in the case of broadband antennas.
  • the antenna according to the invention using the dielectric tuning body a ratio of 10 dB or even better with regard to the suppression of the cross-polar component can be realized even in the sector limits at + 60 '.
  • the decoupling can also be significantly improved in this case.
  • the required decoupling is on the order of more than 30 dB. This is a very big problem especially with broadband antennas or antennas with electrically adjustable attenuation. In the antenna according to the invention, this value is significantly exceeded, especially when the antennas are broadband and can also be set electrically.
  • Moderate dielectric bodies have a positive effect especially for the higher frequency range or the intended multiple frequency ranges, the measures according to the invention having almost no influence on the lower or respectively lowest provided frequency ranges.
  • FIG. 1 shows a schematic plan view of a first exemplary embodiment of an antenna according to the invention for the mobile radio range with a plurality of radiators and a dielectric body provided according to the invention;
  • FIG. 2 shows a schematic transverse side view perpendicular to the vertical longitudinal extension of the antenna in FIG. 1;
  • FIG. 3 shows a vertical end view of the antenna shown in FIGS. 1 and 2;
  • Figure 4 shows an embodiment modified from Figure 1 in plan view
  • FIG. 5 shows a corresponding transverse side view of the antenna shown in FIG. 4;
  • FIG. 6 is an end view (of the antenna shown in Figures 4 and 5);
  • FIG. 7 a schematic plan view of a dielectric body consisting of several parts;
  • Figure 8 is a schematic cross-sectional view of a dielectric body provided with spacers or feet.
  • the antenna 1 comprises five individual radiators, namely two first radiators 4a, which are offset with respect to one another in the vertical direction, for a first lower frequency range and three second radiators 4b, which are offset in the vertical direction, for a higher frequency range.
  • the first emitters 4a are dipole emitters 7 which are arranged in the manner of a dipole square 13 and are held by so-called symmetries 7 ', which at least partially converge towards their common center, and are attached to an electrically conductive reflector 11.
  • the second radiators 4b arranged within these first radiators 4a are formed in the exemplary embodiment shown in the manner of a cross dipole 15 with two dipoles perpendicular to one another.
  • the central radiator device 4b provided between the first radiators 4a and likewise belonging to the group of the second radiators 4b in this exemplary embodiment again consists of a dipole square 17 formed from four dipoles 16, which is in principle comparable and similar to the large dipole squares of the first Radiator 4a is constructed.
  • the emitters mentioned are arranged in front of the vertically aligned reflector 11, the reflector 11 being able to be formed, for example, from a reflector plate 11 ', with two edge sections 12' set up on its vertical sides 12 from the reflector plane in the radiation direction.
  • a dielectric body 21 is also provided to improve various antenna properties, which is plate-shaped in the exemplary embodiment shown and extends at least substantially parallel to the reflector plane. It is preferably at a distance in front of the reflector plane which is less than ⁇ / 2 of the highest transmitted frequency range or less than ⁇ / 2 of the associated center frequency of the highest frequency range.
  • the thickness of the dielectric body can be chosen to vary widely. Good values are between 2% to 30%, in particular 5% to 10% of the distance of the radiator elements of the first radiators 4a from the associated reflector 11.
  • the dielectric body 21 has at least one extension component 22 which runs parallel to the plane of the reflector 11, which is larger than its thickness and / or is greater than the distance from its center plane to the plane of the reflector 11 and / or greater than the distance of the radiator elements 4b, 15 of the radiator elements provided for the upper frequency range from the associated level of the reflector 11.
  • the dielectric body is arranged entirely or at least with a section in front of the reflector 11, specifically above the radiator arrangement provided for the upper frequency range. It also proves to be advantageous if the dielectric body is located entirely or at least with a section below the radiator arrangement provided for the lower frequency range. Both of the above-mentioned conditions should preferably be fulfilled at the same time, the effect being particularly favorable if the dielectric body 21 is therefore wholly or with at least one section above the radiator arrangement provided for the upper frequency range and at the same time below the radiator arrangement provided for the lower frequency range and extends completely or essentially parallel to the reflector.
  • the effect is particularly advantageous if the dielectric body 21 is based on its total volume and / or Total weight is at least sufficiently in this position, e.g. with more than at least 30%, 40%, 50% or especially with more than 60%, 70%, 80% or 90% of its total weight and / or volume is in the specified range.
  • the at least one dielectric body 21 in the projection is perpendicular to the one below it Reflector 11 is smaller than the reflector plate.
  • the dielectric body can also have a size that ultimately corresponds to the size of the reflector 11.
  • the dielectric body 21 is arranged with a first section symmetrically within the first radiator 4a and thus above the second radiator 4b located therein, specifically in the exemplary embodiment shown - since the first radiators 4a are formed from a dipole square - in a square shape.
  • the dielectric body 21 formed in this way is provided in the exemplary embodiment shown with a central vertical section 21b which connects the sections 21a in the region of the dipole squares 13 of the two first radiator arrangements 4a which are offset from one another in the exemplary embodiment shown.
  • the dielectric tuning plate 21 thus formed is designed in one piece. However, it could also consist of several parts which at least approximately correspond to the shape shown in FIG. 1, that is to say, for example, comprise two sections 21a, which are square in shape and are arranged in accordance with the dipole square 13, each concentrically to this, parallel to the reflector plane. The longer connecting section 21b could then be provided running between these two sections 21a.
  • the half width, the value for the suppression can be determined the cross-polar component, the decoupling, but also improve the bandwidth increase in an advantageous manner. Adverse influences for the lower frequency range or the low frequency bands are practically undetectable.
  • the dielectric body is preferably mechanically attached to the radiators, for example to their symmetries.
  • the exemplary embodiment according to FIGS. 4 to 6 differs from that according to FIGS. 1 to 3 in that patch radiators 27 are used for the second radiators 4b (instead of the cross radiators 15), that is to say surface radiators, for example in the form of a square radiator element which A suitable spacing height in front of the reflector 11 is aligned centrally and symmetrically with the same polarization orientation to the first radiators 4a.
  • patch radiators 27 are used for the second radiators 4b (instead of the cross radiators 15), that is to say surface radiators, for example in the form of a square radiator element which A suitable spacing height in front of the reflector 11 is aligned centrally and symmetrically with the same polarization orientation to the first radiators 4a.
  • a further patch radiator 27 is provided lying in the middle, which can be at a different height, as can be seen in particular from the long side view according to FIG. 5 and the front view according to FIG. 6.
  • the remaining first dipole emitters 4a formed in the manner of a di
  • a corresponding dielectric body 21 is provided as a dielectric tuning element or as a dielectric tuning plate 21, as shown in FIGS Descriptions can be found.
  • the dielectric body 21 can be anchored and held in a suitable manner, for example, at the symmetries 7 'of the individual radiator elements. It can also be provided with feet which, for example, are also made of dielectric or metal, and can also be conductive.
  • the dielectric body 21 need not be formed in one piece. It can also consist of several separate separate sections, which are then quasi joined together to a desired shape, it being harmless if the individual elements from which the dielectric body 21 can be formed do not lie together over the full area in the direction of attachment, but for example in one schematic plan view according to FIG. 7, spacing gaps 31 remain between the individual elements.
  • the dielectric tuning element or the dielectric body can also be provided with spacers for attachment to the reflector 21, the spacer elements 41 being separate spacers or made of the same material can exist, such as the dielectric body 21 itself. Where and in what size the spacers or spacers are formed can be varied as desired in wide ranges.
  • the shape can also vary widely.
  • the shape can be changed so that the desired advantageous antenna properties can be set and implemented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Abstract

L'invention concerne une antenne améliorée, en particulier une antenne radio mobile, présentant les caractéristiques suivantes : au moins un corps diélectrique (21) supplémentaire est utilisé, ledit corps diélectrique (21) étant disposé, d'une part, entièrement ou, par rapport à son volume et/ou son poids, partiellement, à plus de 40 %, en particulier à plus de 50 % ou de 60 %, au-dessous de l'émetteur (4a, 13) pour la plage de fréquences inférieure et, d'autre part, entièrement ou au moins, par rapport à son volume et/ou son poids, à plus de 40 %, 50 % ou 60 %, vu du réflecteur (11), au-dessus de l'émetteur (4b, 15) prévu pour une plage de fréquences supérieure.
EP01271671A 2000-12-21 2001-12-13 Antenne, en particulier antenne radio mobile Expired - Lifetime EP1344277B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10064129A DE10064129B4 (de) 2000-12-21 2000-12-21 Antenne, insbesondere Mobilfunkantenne
DE10064129 2000-12-21
PCT/EP2001/014711 WO2002050945A1 (fr) 2000-12-21 2001-12-13 Antenne, en particulier antenne radio mobile

Publications (2)

Publication Number Publication Date
EP1344277A1 true EP1344277A1 (fr) 2003-09-17
EP1344277B1 EP1344277B1 (fr) 2006-04-26

Family

ID=7668354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01271671A Expired - Lifetime EP1344277B1 (fr) 2000-12-21 2001-12-13 Antenne, en particulier antenne radio mobile

Country Status (13)

Country Link
US (1) US6831615B2 (fr)
EP (1) EP1344277B1 (fr)
KR (1) KR100604770B1 (fr)
CN (2) CN2496138Y (fr)
AT (1) ATE324678T1 (fr)
AU (1) AU2002216110A1 (fr)
BR (1) BR0108326A (fr)
CA (1) CA2430105C (fr)
DE (2) DE10064129B4 (fr)
ES (1) ES2261336T3 (fr)
NZ (1) NZ525698A (fr)
WO (1) WO2002050945A1 (fr)
ZA (1) ZA200207281B (fr)

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DE10064129B4 (de) 2006-04-20
WO2002050945A8 (fr) 2003-04-10
CA2430105C (fr) 2008-06-10
DE50109647D1 (de) 2006-06-01
NZ525698A (en) 2004-02-27
KR100604770B1 (ko) 2006-07-26
KR20020073212A (ko) 2002-09-19
AU2002216110A1 (en) 2002-07-01
CN1404639A (zh) 2003-03-19
CN1227772C (zh) 2005-11-16
WO2002050945A1 (fr) 2002-06-27
DE10064129A1 (de) 2002-07-18
ES2261336T3 (es) 2006-11-16
ATE324678T1 (de) 2006-05-15
US20030011529A1 (en) 2003-01-16
EP1344277B1 (fr) 2006-04-26
BR0108326A (pt) 2003-03-11
CA2430105A1 (fr) 2002-06-27
ZA200207281B (en) 2003-01-14
CN2496138Y (zh) 2002-06-19
US6831615B2 (en) 2004-12-14

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