CN201490345U - Dual polarization wide frequency array intelligent antenna capable of coving three frequency bands - Google Patents

Abstract

The utility model provides a dual polarization wide frequency array intelligent antenna capable of coving three frequency bands. The array antenna is composed of a microstrip standard network, a microstrip feed network, a reflecting plate and a plurality of array antennae, wherein each array unit is composed of a plurality of antenna units, the array antennae are composed of a plurality of array units which are alternatively arranged, the array units are composed of a plurality of antenna units which are arranged into a straight line, the distance among the antenna units is between a half wave length and a wave length, and the antenna units adopt the microstrip feed network for feeding. The size of the antenna unit can be shortened under the condition of the same antenna performance indexes through adding one metal plate on a vibrator arm, and the antenna unit after improvement has simple structure mode, is convenient for production manufacture and debugging, lowers the cost of the antenna, and is convenient for project use.

Description

A kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges

Technical field

The utility model relates to the structure and the method for radio communication system base station or discharging-directly station antenna array, especially a kind ofly can cover three frequency range dual polarization broadband array intelligent antennas.

Background technology

Mobile communication and the Internet are the two big business that world today's telecommunications industry is with fastest developing speed, market potential is maximum, prospect is the most tempting.Along with enabling of 3-G (Generation Three mobile communication system) (hereinafter to be referred as 3G), the 3G wireless mobile telecommunication technology causes that people greatly pay close attention to.The TD-SCDMA mobile communication system is the 3G international standard that is proposed by China, is formally adopted by International Telecommunication Union in 2000, becomes one of 3G international standard of whole world approval.This is the complete communication system standard that proposes first of China and by international endorsement, it is a breakthrough of Communication in China standardization areas, filled up the blank of the century-old telecommunication history of China, the telecommunication technology level that indicates China has entered the brand-new stage of driving the industry development with autonomous innovation, for the sustainable development of China's telecommunications industry, realize that China has crucial meaning by the transformation that telecommunications big country makes the country prosperous to telecommunications.Intelligent antenna technology is one of core key technology of TD-SCDMA system, utilize Digital Signal Processing, advanced switched-beam technology and adaptive space digital processing technology have been adopted, produce the spatial orientation wave beam, make antenna main beam aim at the subscriber signal arrival direction, secondary lobe or zero falls into aims at the interference signal arrival direction, reaches the purpose of fully efficiently utilizing mobile subscriber's signal and deletion or suppressing interference signal.It is the effective way that solves the frequency resource scarcity, can also improve power system capacity and communication quality simultaneously, and therefore, intelligent antenna technology has become a research focus in the moving communicating field in recent years.

China the Ministry of Industry and Information Technology has issued the licence plate of 3G mobile communication system in January, 2009, for the application of TDD and FDD provides required frequency range, the frequency range that the TD network allows to use has: A section: 1880MHz-1920MHz, B section: 2010MHz-2025MHz and C section: 2300MHz-2400MHz.At present the TD network is enabled the B section, and the 15MHz bandwidth is only arranged, and this bandwidth is to satisfy the needs of the China Mobile of the China that has 1,300,000,000 populations and 400,000,000 mobile phone users to the future mobile communications business, will enable A frequency range and C frequency range future.

Development at present and the smart antenna that uses only can satisfy A frequency range and B frequency range, and adopt the polarization mode of single polarization more, or 1880-1920/2010-2025MHz directional intelligent antenna array, or 1880-1920/2010-2025MHz omnidirectional intelligent aerial array row, the smart antenna that above-mentioned patent disclosed can not cover the 2300-2400MHz frequency range.

The utility model content

The purpose of this utility model is to overcome the deficiency on the existing TD-SCDMA system base-station antenna covering frequence scope, a kind of realization simple in structure, easy is provided, can covers the good TD-SCDMA system intelligence array antenna of three frequency bands, performance of TDD mode, the antenna that causes to avoid following TD-SCDMA system master frequency range to increase updates and repeats buying.

In order to solve above technical problem, a kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges that the utility model provides, by little band calibration network, microstrip feed network, reflecting plate and a plurality of array antenna are formed, described array antenna is made of a plurality of array elements, array element is made up of a plurality of antenna elements, its innovative point is: described array antenna is made of a plurality of staggered array elements, described array element is made up of a plurality of antenna element alinements, spacing between antenna element is between half wavelength and the wavelength, and described antenna element adopts microstrip feed network to carry out feed.Further, the array element of the described aerial array ± 45 formation face battle array that ° is staggered, array element can also be lined up cylindrical array, spherical array etc.

Further, the spacing between described array element is 72-77mm.

Further, described antenna element is 90 ° and constitutes oscillator by dipole arm, oscillator supporting leg are integrated, two symmetrical dipole supporting legs are connected on the base in the bottom, the metal tag is placed on the top of oscillator arms, be fixed on the base by the tag support, the combination of dipole arm, oscillator supporting leg, base, cross metal tag, tag support is fixed on the reflecting plate vertically and constitutes.

Further, the cross section of described dual polarization dipole arm, oscillator arms supporting leg is rectangle, and can also be prismatic, square, circular, oval.

Further, described metal tag is a cross, can also be rectangle, square, circle, ellipse etc.

Advantage of the present utility model and beneficial effect: antenna element of the present utility model adopts the oscillator arms of rectangular cross section, can make the input impedance of oscillator mild with the variation of frequency, thereby element antenna amplitude fading in wider frequency is less, and then element antenna can cover wider frequency, and, above oscillator arms, added a slice sheet metal in the utility model, by the influence to antenna energy in the oscillator near field, the size of under same antenna performance index situation, having dwindled antenna element.Through changing three frequency ranges that oscillator arms shape and additional tag can cover antenna element to distribute to TDD, and the antenna unit structure form after improving is simple and easy, is convenient to production and processing and debugging, has reduced the cost of antenna, is convenient to through engineering approaches and uses.Simultaneously, the utility model adopts two doublet antennas is carried out ± 45 ° of cross polarizations, the antenna array structure compactness, reduced the cross-sectional area of intelligent antenna array, and then reduced the wind load of antenna, improved the safe class of antenna, and the installation of convenient antenna, be convenient to the hidden of antenna, can be mutually harmonious by beautifying with urban look.

Description of drawings

Fig. 1 is an antenna unit structure schematic diagram of the present utility model;

Fig. 2 a is the utility model intelligent antenna array front schematic view;

Fig. 2 b is the feeding network figure of the utility model antenna array element reverse side;

Fig. 3 is the standing-wave ratio analogous diagram of antenna element.

Embodiment

Further specify below in conjunction with accompanying drawing and example method the technical program.

Referring to Fig. 1, antenna element is made up of dipole arm 1, oscillator supporting leg 2, base 3, cross metal tag 4, tag support 5 and reflecting plate 6, is used to influence the radiation frequency scope of oscillator.The cross section of described dual polarization dipole arm 1, oscillator arms supporting leg 2 can be rectangle, can also be prismatic, square, circular, oval.The shape of described metal tag 4 can be cross, can also be rectangle, square, circle, ellipse etc.The concrete structure of said modules is as follows: dipole arm 1, oscillator supporting leg 2 are integrated components, the cross section of dipole arm 2 is rectangle, 2 of dipole arm 1 and symmetrical dipole supporting legs are 90 ° approximately, two symmetrical dipole supporting legs 2 are connected on the base 3 in the bottom, metal tag 4 is placed on the top of oscillator arms 1, be fixed on the base 3 by tag support 5, the combination of dipole arm 1, oscillator supporting leg 2, base 3, cross metal tag 4, tag support 5 is fixed on the reflecting plate 6 vertically.The change of the change of tag 4 sizes of above-mentioned oscillator arms 1 top and tag 4 and 1 distance of oscillator arms can influence the radiation frequency scope of antenna oscillator arm 1, the size of tag 4 and it and 1 distance of oscillator arms are all by the optimizing process decision to antenna structure, from foregoing as seen, the size of change tag 4 and tag 4 and 1 distance of oscillator arms can be adjusted the frequency range that antenna covers.

Referring to Fig. 2 a, 2b, intelligent antenna array is made up of little band calibration network 11, array element 12 and microstrip feed network 14, each array element 12 is made up of the antenna element 13 at a distance of half wavelength of alinement, array element 12 intersects wrong row's composition face battle array in ± 45 ° amplitude, the spacing that array element is 12 is 75mm, and antenna element 13 connects the distributing point 18 of the microstrip feed network 15 of array element 12 reverse side by coaxial line.Microstrip feed network 15 is printed on the medium substrate, form by same polarization or heteropole feed structure 16 and heteropoleization or same polarization feed structure 19, the same polarization symmetrical dipole of all antenna elements 13 will adopt the feed structure 16 or feed structure 19 feeds of array element 12 in the aerial array, and the heteropole symmetrical dipole of all antenna elements 13 will adopt the feed structure 19 or feed structure 16 feeds of array element 12 in the aerial array.Antenna power load point 14 joins by the power supply load point 17 of coaxial line and microstrip feed network in little band calibration network 11, from foregoing as seen, amplitude and the phase place of compose giving the excitation of each antenna element 13 is the width and length decision by the feeding network microstrip line, and the width and the length of the feed microstrip line of each antenna element of change connection can change the radiation beam angle of declination.Therefore, in this structure, the array element of described aerial array is staggered except formation face battle array, and array element can also be lined up cylindrical array, spherical array etc.

Referring to Fig. 3, the antenna element standing-wave ratio that obtains when curve representation is with the emulation of electromagnetism simulation software among the figure is with the situation of frequency change, as can be seen from the figure, the curve a of antenna element standing-wave ratio when 1880～1920MHz frequency range is 1.22～1.36, the curve b of standing-wave ratio is 1.04～1.05 when 2010～2025MHz frequency range, the curve c of standing-wave ratio is 1.11～1.24 when 2300～2400MHz frequency range, promptly, antenna element all less than 1.45, all can satisfy the mobile communication antenna code requirement in the standing-wave ratio of above three frequency ranges.

Claims (6)

1. dual polarization broadband array intelligent antenna that can cover three frequency ranges, described array antenna is made up of little band calibration network, microstrip feed network, reflecting plate and a plurality of array antenna, described array element is made up of a plurality of antenna elements, it is characterized in that: described array antenna is made of a plurality of staggered array elements, described array element is made up of a plurality of antenna element alinements, spacing between antenna element is between half wavelength and the wavelength, and described antenna element adopts microstrip feed network to carry out feed.

2. a kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges according to claim 1 is characterized in that: the array element of the described aerial array ± 45 formation face battle array that ° is staggered, array element can also be lined up cylindrical array, spherical array.

3. a kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges according to claim 2 is characterized in that: the spacing between described array element is 72-77mm.

4. a kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges according to claim 1, it is characterized in that: described antenna element is 90 ° and constitutes oscillator by dipole arm, oscillator supporting leg are integrated, two symmetrical dipole supporting legs are connected on the base in the bottom, the metal tag is placed on the top of oscillator arms, be fixed on the base by the tag support, the combination of dipole arm, oscillator supporting leg, base, cross metal tag, tag support is fixed on the reflecting plate vertically and constitutes.

5. a kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges according to claim 3, it is characterized in that: the cross section of described dual polarization dipole arm, oscillator arms supporting leg is rectangle, and can also be prismatic, square, circular, oval.

6. a kind of dual polarization broadband array intelligent antenna that can cover three frequency ranges according to claim 3 is characterized in that: described metal tag is a cross, can also be rectangle, square, circle, ellipse.

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