CN101888017B - Shunt-type omnidirectional antenna array of three frequency bands of GSM (Global System for Mobile Communications) 850/DCS (Digital Communication Service)/PCS (Personal Communication Service) - Google Patents
Shunt-type omnidirectional antenna array of three frequency bands of GSM (Global System for Mobile Communications) 850/DCS (Digital Communication Service)/PCS (Personal Communication Service) Download PDFInfo
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Abstract
The invention relates to a shunt-type omnidirectional antenna array of three frequency bands of GSM (Global System for Mobile Communications) 850/DCS (Distributed Control System)/PCS (Personal Communication Service), belonging to the field of antenna designs. The antenna array is a three-frequency-band base station system used for supporting the GSM 850 (824-894MHz), the DCS (1,710-1,880MHz) and the PCS (1,850-1,990MHz) and has the advantages of miniaturization, omnidirectional coverage rate, low cost and high gain. The antenna array is characterized in that parallel feed networks are adopted in parallel dual feed structures of both the front side and the back side of a printed circuit board, and the adopted parallel feed network can ensure all antenna array elements are excited in the same direction on the premise of no any phase shift, thereby the problem that a series-fed type array bandwidth is limited by the feed networks is solved. Meanwhile, a three-frequency-band omnidirectional array element is designed in a mode of chamfering a printed dipole, and a microstrip short-circuit line is connected to compensate the capacitive impedance of the DCS/PCS frequency bands, thus the high-gain omnidirectional base station antenna of three frequency bands of GSM 850/DCS/PCS is realized. The antenna array has the advantages of compact structure, miniaturization, easy integration and flexible design and is suitable for the design of a miniature multi-frequency-band high-gain base station antenna of a GSM 850/DCS/PCS system.
Description
Technical field
The present invention relates to a kind of co-feeding omni-directional antenna arrays design of the GSM850/DCS/PCS of support three frequency ranges, be used in particular for multiband, miniaturization, cheaply in the mobile communication base station, belong to the Antenna Design field of wireless communication technology.
Background technology
Along with the fast development worldwide of mobile communication cause, mobile communication is provided convenience for people's work and life more and more and is quick.Mobile subscriber's quantity increases just with surprising rapidity and will continue rapid growth over past ten years, and this requires power system capacity increasing, and speech quality requires more and more higher.From systems such as AMPS, the TACS of the first generation, NMT, the gsm system of the second generation and narrowband CDMA system develop into the 3G (Third Generation) Moblie systems such as present WCDMA, CDMA2000, TD-SCDMA to mobile communication system.Antenna for base station is the important component part of mobile communication wireless connecting system, and its development is subject to the impact of many factors, particularly mobile communications network constantly to the expansion of breadth and depth, causes station layout more and more intensive.Aspect the evolution of system, antenna for base station is as the also thereupon evolution of a part of system.The difference of different system has proposed Secretary to antenna performance, and this requires also to have driven the development of antenna for base station technology.The arrival in 3G communication epoch means that operator need to build more base station.On the one hand, the development of mobile communication, new system constantly releases, and antenna for base station has been proposed new demand, and simultaneously, operator continues to increase the input of networking for higher-quality network service is provided, and builds more base stations; On the other hand, people's environmental consciousness is constantly strengthened, and urban construction strides forward towards the direction of " ecocity ", " green city ", this so that the development of antenna for base station all face new challenges.For satisfying these requirements, the high-performance antenna for base station of development multiband, miniaturization, low cost, high-gain has realistic meaning very much.
Antenna for base station is radiation and reception electromagnetic waves parts as the throat thoroughfare of mobile communication system.The quality of antenna for base station performance plays conclusive effect to the overall performance of mobile communication system, and a secondary high performance antenna for base station can relax the requirement of system and improve the performance of whole system.The key problem of modern antenna design is exactly to make antenna satisfy specification requirement more harsh in the new system, and surmounts original antenna form, satisfies new system requirements.Mobile subscriber's sharp increase so that communication system is constantly updated and dilatation, for reducing the interference between antenna and reducing cost, requires antenna to work in broad frequency range, satisfies simultaneously the communicating requirement of a plurality of systems, realizes shared by multiple systems and transmit-receive sharing.Studying the antenna for base station that a plurality of systems share and can reduce the number of antenna and reduce inter-antenna interference and antenna cost, and can share original base station, therefore, is very significant to the research of multiband antenna for base station.
Mobile subscriber's quantity is with the about rate increase of twice in every year, for satisfying user's rapid growth, usually selects the cellulor radius less than 1km in the higher urban district of user density.China's mobile communication base station number is near 1,000,000 at present, calculate with each base station 3 surface antenna, China's antenna for base station recoverable amount will be at 3,000,000 covers, and this is so that stand in great numbers at a lot of local antenna for base station, Just because of this, the visual pollution of antenna for base station more and more comes into one's own.Therefore in the urgent need to can save set up the space and have miniaturization, the antenna of the advantage such as the high and low cost that gains, angle of coverage are large.
In wireless telecommunications, the horizontal omnidirectional antenna plays an important role.The horizontal omnidirectional antenna refer to a kind of in horizontal plane the antenna of 360 ° of homogeneous radiations, it is widely used in the fields such as point-to-multipoint communication, broadcasting, transfer of data, establishment wireless frequency expansion net.Along with the fast development of electronic technology, mobile communication system is constantly upgrading on function, capacity, quality and service business, so they have proposed more and more higher performance index requirement to the horizontal omnidirectional antenna; Simultaneously, antenna system is usually operated under the complicated mobile circumstances, will be subject to many-sided decline when electric wave is propagated aloft, and channel also is subject to the impact of the environmental factors such as landform, temperature, humidity.Therefore, the mobile communication base station has taked the measure of high-gain omni-directional antenna to improve communication quality now.Compare with phased array antenna with the mechanical scanning antenna, omnidirectional antenna has its outstanding advantage: structure is relatively simple, and low cost of manufacture can minimum cost realize omnibearing covering.High-gain and omni-directional are the requirement of a contradiction to antenna simultaneously, so the omni-base station antenna of research high-gain has important realistic meaning.
Continuous increase along with the network coverage and capacity, mobile communication has proposed more and more higher requirement to antenna for base station, miniaturization, omni-directional, multiband, high-gain and antenna that more can the adaptive system various requirement remain the important subject in the outer antenna for base station field of Present Domestic, simultaneously Antenna Design and use the factor that also will consider the aspects such as propagation, system, engineering and environmental condition.There is the situation of platform of many antenna duplexers, shared by multiple systems one cover antenna in the Joint construction and sharing of current each operator, and such scene requires antenna for base station to support the mobile communication system of multiband.This technology has greatly reduced the antenna number, but has increased certain difficulty for the design of antenna for base station.Antenna for base station miniaturization, low cost also are present very important developing direction.The miniaturization antenna for base station can be used in the indoor base station equipment, to save the space of indoor section, plays the effect of " femto cell ", reaches the reduction cost, improves the purpose of signal coverage rate.In a word, China's antenna for base station is just towards future developments such as miniaturization, omni-directional, multiband, high-gain and low costs.
Current, design direction figure horizontal plane omnidirectional, the antenna for base station of the narrow main lobe of pitching face, Sidelobe is one of study hotspot of field of antenna.Traditional vertical half-wave dipole antenna is a good selection, and it satisfies the requirement of antenna for base station directional diagram horizontal omnidirectional, but its common gain only has 2.15dBi, does not reach the requirement of antenna for base station high-gain.In order to improve the gain of half-wave dipole, the coaxial conllinear sixties in last century (COCO) antenna is widely used.It adopts a kind of mode of conllinear to arrange the half-wave dipole subarray, and in order to make in the same way feed of all bays, coaxial feeder every 1/2 wavelength internal and external conductor reversal connection once.Yet the frequency more than 1GHz, the efficient of this coaxial conllinear (COCO) antenna can sharply descend, and can not satisfy the requirement of present communication system.Recently, in order to solve efficiency and to reduce cost, many omnidirectional printed a period of time are suggested and replace coaxial conllinear (COCO) antenna.Because these printed dipole subarrays adopt the mode of serial feed, every mistake 1/2 wavelength just needs 180 ° phase shift to guarantee all bay isotropic excitation, and this is just so that the spacing between the antenna element of series feed array must be 1/2 wavelength.So in design multiband omnidirectional array, array must be divided into different sections, every section correspondence different operating frequencies.For series feed array, all array elements are not to work simultaneously like this, and radiation array element difference corresponding to different frequency, and therefore series feed array is oversize, and gain fluctuation is very large in the horizontal plane.In addition, this serial feed network is very complicated, and the antenna bandwidth of operation is limited by feed structure, and main lobe direction can depart from along with frequency change horizontal plane.In order to cater to the requirement of current base station antenna miniaturization, multiband, omnidirectional's coverage rate, the aerial array of research and development parallel feed is of great value.And the feedback omni-directional antenna arrays has symmetrical feed structure, and feed is consistent to the length of each array element, like this and present array without any need for phase shift, just can guarantee each array element isotropic excitation.Because and present the restriction that structure does not have phase shift, it is well suited for the communication system for multiband, broadband.
Summary of the invention
The structural design that the purpose of this invention is to provide the co-feeding multiband omni-directional array antenna of a kind of compact conformation, miniaturization, easy of integration, flexible design.This aerial array is used for supporting global system for mobile communications GSM850 (824-894MHz), digital communications services DCS (1710-1880MHz), three frequency range base station systems with personal communication service PCS (1850-1990MHz) have advantages of miniaturization, omnidirectional's coverage rate, low cost, high-gain.This antenna adopts the form of dipole antenna array, and two back-to-back dipole array element improves gain by the mode of parallel feed.The elementary cell of multifrequency antenna must have the multi resonant characteristic of shaking, and perhaps has broadband properties.At first design three frequency range omnidirectional array elements by the mode of being carried out corner cut printing a period of time, and with one section little capacitive impedance with short-circuit line compensation DCS/PCS frequency range, reach the port match of three frequency ranges with this.Because the array element of omnidirectional array needs in the same way feed, and array element must be point-blank, so the design difficulty of omni-directional antenna arrays is how to design feeding network.This aerial array adopts the structure of parallel feed, and the antenna element of this compactness and the design of feeding network have realized GSM850/DCS/PCS three frequency range omni-directional high-gain base-station antenna array.And the feedback network is full symmetric for the feeder line of each array element, in the situation that without any need for phase-shifting unit, just can realize in the same way feed of each array element.Utilize and the advantage of feedback network in the multifrequency antenna design, reduced the size of antenna, overcome the shortcoming of original series feed omnidirectional array Bandwidth-Constrained system.The present invention adopts common printed circuit board (PCB) (PCB, printed circuit board), has reduced the cost of design.
The invention is characterized in, contain the first dipole array element 11 of double-layer printing circuit board 2, corner cut and the second dipole array element 12 of corner cut, parallel twin lead 3, little band short-circuit line 4 and half steel coaxial feeder 5, wherein:
The first dipole array element 11 of corner cut and the second dipole array element 12 of corner cut are printed on respectively the positive and negative two sides of described printed circuit board (PCB) 2 in back-to-back mode, the dipole array element of each described corner cut has 360 ° of homogeneous radiations of horizontal omnidirectional, and described dipole array element is the rectangle of corner cut, the length of described dipole has determined first resonance frequency, and the size of described corner cut has determined second resonance frequency;
Parallel twin lead has two, represents with the first twin lead 31 and the second twin lead 32, and be a kind of two-wire line that is printed on respectively the positive and negative two sides of described printed circuit board (PCB) 2, it adopts the grading structure of the impedance transformation of 50-100 Ω; Described the first twin lead 31 1 ends are fed to the lower metal arm 112 of the first dipole array element 11, and the other end is fed to second little band short-circuit line 42; Described the second twin lead 32 1 ends are fed to the upper metal arm 121 of the second dipole array element 12, and the other end is fed to first little band short-circuit line 41, form the network of parallel feed, guarantee in the same way feed of two dipole array elements;
Little band short-circuit line, have two, represent with first little band short-circuit line 41 and second little band short-circuit line 42, just be printed on respectively described printed circuit board (PCB), anti-two sides, described first a little end with short-circuit line 41 is connected to the second twin lead 32, the other end is connected to the upper metal arm 111 of the first dipole array element 11 of the described corner cut in printed circuit board (PCB) 2 fronts by short circuit through hole 61, described second a little end with short-circuit line 42 is connected to the first twin lead 31, and the other end is connected to the lower metal arm 122 of the second dipole array element 12 of the described corner cut of printed circuit board (PCB) 2 reverse side by short circuit through hole 62; Described two the dipole array elements 11 of described little length adjustment with short-circuit line, 12 separately successively and the impedance matching between described parallel two twin leads 31,32;
Half steel coaxial feeder 5, its outer conductor are welded on the first twin lead 31 of described printed circuit board (PCB) 2, and inner wire is connected on the second twin lead 32 by the through hole 63 at printed circuit board (PCB) 2 centers, form the distributing point of described twin lead 3.
The co-feeding omni-directional antenna arrays of described GSM850/DCS/PCS three frequency ranges, it is characterized in that: the coupling of improving second resonance band DCS/PCS of antenna by the corner cut size of electrode couple submatrix unit 11,12, and by little capacitive impedance that compensates the DCS/PCS frequency range with short-circuit line 4, realize the dipole array element of three frequency ranges with this.
The co-feeding omni-directional antenna arrays of described GSM850/DCS/PCS three frequency ranges, it is characterized in that: twin lead 3 is with symmetrical parallel feed mode excited doublet array element 11 and dipole array element 12, without any need for phase shifiting device, on any frequency, can both guarantee all dipole array elements 11,12 isotropic excitation, reach the purpose of strengthening antenna gain.
The co-feeding omni-directional antenna arrays of described GSM850/DCS/PCS three frequency ranges is characterized in that the outer conductor of half steel coaxial feeder 5 is welded on the first twin lead 31 of described printed circuit board (PCB) 2; Second little band short-circuit line 42 that the first twin lead 31 connects extends to the printed circuit board (PCB) bottom, and join by the lower metal arm 122 of a succession of through hole and the second dipole array element 12, so the outer conductor of half steel cable 5 joins with the second dipole array element 12, can the radiation of aerial array not exerted an influence.
The present invention has advantages of compact conformation, miniaturization, easy of integration, flexible design, is applicable to the design of the small multi-frequency section high-gain base station antenna of GSM850/DCS/PCS system.
Description of drawings
Fig. 1 is the co-feeding omni-directional antenna arrays graphics of GSM850/DCS/PCS three frequency ranges provided by the invention, and the cylinder that is attached on the twin lead 31 is half steel coaxial cable 5.
Fig. 2 is that the A of Fig. 1 is the partial enlarged drawing that longitudinal sectional drawing and half steel coaxial cable 5 connect apex drive point to view.
Fig. 3 is that the B of Fig. 1 is vertical view to view, and stain is the short circuit through hole.
Fig. 4 is that the C of Fig. 1 is upward view to view, and stain is the short circuit through hole.
Fig. 5 be the A of Fig. 1 to the embodiment dimensional drawing of view structure, unit be the millimeter (mm).
Fig. 6 be B, the C of Fig. 1 to the embodiment dimensional drawing of view structure, represent respectively with the printed circuit board (PCB) tow sides, stain is the short circuit through hole, unit be the millimeter (mm).
Fig. 7 is the return loss survey map (S11) of co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges of Fig. 5-Fig. 6 embodiment :-▲-.
Fig. 8 be Fig. 5-Fig. 6 embodiment GSM850/DCS/PCS three frequency ranges the co-feeding omni-directional antenna arrays gain measurement figure :-▲-.
Fig. 9 is the power gain directional diagram of the co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges of the embodiment of Fig. 5-Fig. 6 when working in 850MHz: (■-: θ component power gain directional diagram;-▲-: φ component power gain directional diagram): (a): X-Z planar power gain pattern; (b): Y-Z planar power gain pattern; (c): X-Y plane power gain directional diagram.
Figure 10 is the power gain directional diagram of the co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges of the embodiment of Fig. 5-Fig. 6 when working in 1850MHz: (■-: θ component power gain directional diagram;-▲-: φ component power gain directional diagram): (a): X-Z planar power gain pattern; (b): Y-Z planar power gain pattern; (c): X-Y plane power gain directional diagram.
Embodiment
The invention provides a kind of co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges, specific embodiments comprises:
The first dipole array element 11 of corner cut and the second dipole array element 12 of corner cut are printed on respectively the positive and negative two sides of described printed circuit board (PCB) 2 in back-to-back mode, two dipole array elements have the structure of full symmetric, each dipole array element consists of by two identical rectangular metal arms of size, and each rectangular metal arm has 45 ° corner cut;
Little band short- circuit line 41 and 42 is printed on anti-, the positive two sides of described printed circuit board (PCB) symmetrically, first positive little the second twin lead 32 with short-circuit line 41 1 ends and reverse side joins, and other end short circuit through hole 61 is connected to the upper metal arm 111 of the first positive dipole array element 11; Symmetrically, second of reverse side littlely joins with short-circuit line 42 1 ends and positive the first twin lead 31, and other end short circuit through hole 62 is connected to reverse side the and the lower metal arm 122 of dipole array element 12;
The outer conductor of half steel coaxial feeder 5 is welded on the first twin lead 31 of twin lead 3, and inner wire is connected on the second twin lead 32 of twin lead 3 by the through hole 63 that is in apex drive point; For the outer conductor electric current that makes half steel coaxial feeder 5 does not affect this antenna array pattern, on positive second little feed port that extends to the antenna bottom with short-circuit line 42 always;
As shown in Figure 1-Figure 3, antenna system comprises the second dipole array element 12 of the first dipole array element 11 of corner cut and corner cut, parallel twin lead 3, little band short-circuit line 4 and half steel coaxial feeder 5.Half steel coaxial feeder 5 with the connection of twin lead 3 as shown in Figure 2; Be printed on the front of printed circuit board (PCB) in the first dipole array element 11 of corner cut, the second dipole array element 12 of corner cut is printed on the reverse side of printed circuit board (PCB), and structure is shown in Fig. 3,4.Twin lead 3 is pressed the transition line design of 50-100 Ω impedance transformation, and the diameter of half steel coaxial cable 5 is 2.2mm, and characteristic impedance is 50 ohm.When by half steel coaxial cable 5 feed, signal path is: the twin lead 3-of half steel coaxial cable 5-＞parallel＞little band short-circuit line 4-＞dipole array element 11 and dipole array element 12.
Technical scheme of the present invention is achieved in that the elementary cell of multifrequency antenna must have the multi resonant characteristic of shaking, at first design three frequency range omnidirectional array elements by the mode of being carried out corner cut printing a period of time, and with one section little capacitive impedance with short-circuit line compensation DCS/PCS frequency range, reach the port match of three frequency ranges with this.The array element of omnidirectional array need to guarantee isotropic excitation, and array element must be point-blank, and how designing feeding network is the difficult point of design three frequency range high-gain omni-directional antenna arrays.This aerial array adopts the structure of parallel feed, and by parallel parallel feed 3 symmetrically excited doublet array element 11 and dipole array element 12, and the feedback network is full symmetric for the feeder line of each array element, can guarantee under any frequency in the same way feed of each array element.Utilize the also advantage of feedback network in the multifrequency antenna design, reduced the size of antenna, realized the omnidirectional antenna of multiband, high-gain.The requirement of real base station antenna from base drive satisfied in the design that is connected of half steel coaxial cable 5 and feeding centre.On the whole, the requirement of antenna for base station multiband, miniaturization, low cost, high-gain is satisfied in the design of this antenna.
This structure is described as follows:
The low-frequency range that realizes at first as requested operating frequency is the GSM frequency range, the length of design dipole array element rectangular metal; Secondly, it is the impedance matching of DCS/PCS frequency range at high band that width by adjusting dipole array element rectangular metal and the size of 45 ° of corner cuts are improved it, design little length with short-circuit line 4, play the effect of series inductance, offset the larger capacitive impedance of DCS/PCS frequency range, reach the port match of three frequency ranges; The 3rd, the gradual change size of the symmetrical twin lead 3 that walks abreast of design realizes 50-100 Ω impedance transformation; On the first twin lead 31 of the outer conductor welding twin lead 3 of last half steel coaxial feeder 5, inner wire is connected on the second twin lead 32 of twin lead 3 by the through hole that is in apex drive point.Matching network of the present invention can adopt common digital circuit PCB manufacture craft to make.
Printed circuit board (PCB) adopts the thick dielectric substrate of 1mm, and relative dielectric constant is 2.65 (ordinary numbers circuit board material FR4, identical with the match circuit plate material); All the other each part sizes such as Fig. 5-shown in Figure 6, unit is millimeter (mm).
The S11 test result of the co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges made from Fig. 5-shown in Figure 6 size as shown in Figure 7, the return loss S11 of this antenna＜-bandwidth of 10dB is 800-930MHz (130MHz) in low-frequency range, high band is 1700-2050MHz (350MHz), can cover respectively GSM850 (824-894MHz), DCS (1710-1880MHz), and three frequency ranges of PCS (1850-1990MHz).
The power gain test result of the co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges made from Fig. 5-shown in Figure 6 size as shown in Figure 8, in the scope of GSM frequency range 824-894MHz, antenna gain is 3.4～3.8dBi; In the scope of DCS/PCS frequency range 1710-1990MHz, antenna gain is 3.8～5.5dBi.
The power gain directional diagram of the co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges made from Fig. 5-shown in Figure 6 size as shown in Figures 9 and 10.At low-frequency range f=850MHz, the power gain directional diagram as shown in Figure 9, E face (X-Z plane, Y-Z plane) is similar to down 8 types, main lobe 3dB beamwidth is approximately 40 °, main lobe secondary lobe ratio is better than 13.4dB; H face (X-Y plane) has good omni-directional, and gain fluctuation is less than 1.5dBi, and cross polarization all is better than 18dB in 3dB wave beam bandwidth.At high band f=1850MHz, the power gain directional diagram as shown in figure 10, E face (X-Z plane, Y-Z plane) main lobe 3dB beamwidth is approximately 25 °, main lobe secondary lobe ratio is better than 7.9dB; H face (X-Y plane) has good omni-directional equally, and gain fluctuation intersects in 3dB wave beam bandwidth and all is better than 25dB less than 1.5dBi.As can be known, described antenna is realized the coupling of GSM850/DCS/PCS three frequency ranges, and omni-directional is good in the directional diagram horizontal plane, and the main lobe wave beam is narrow in the vertical plane, and secondary lobe is little; Main lobe direction is aimed at horizontal plane always, is not offset with frequency change; Simultaneously described antenna structure is compact, has realized the miniaturization of antenna.The present invention provides solution for multiband miniaturization antenna for base station, promotes the development of antenna for base station technology, and antenna for base station becomes a reality to allow miniaturization, omni-directional, multiband, high-gain reach cheaply.
The co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges of the present invention not only can the GSM850/DCS/PCS communication service in, also can be applied in other professional base station the corresponding size of adjusting described antenna according to the vocational work frequency.The present invention is highly suitable for the design in the base station system of multiband, high-gain, high coverage rate.
Claims (2)
1.GSM850/DCS/PCS the co-feeding omni-directional antenna arrays of three frequency ranges, it is characterized in that: contain the first dipole array element (11) of double-layer printing circuit board (2), corner cut and the second dipole array element (12) of corner cut, parallel twin lead (3), little band short-circuit line (4) and half steel coaxial feeder (5), wherein:
The first dipole array element (11) of corner cut and the second dipole array element (12) of corner cut are printed on respectively the positive and negative two sides of described printed circuit board (PCB) (2) in back-to-back mode, the dipole array element of each described corner cut has 360 ° of homogeneous radiations of horizontal omnidirectional, and described dipole array element is the rectangle of corner cut, the length of described dipole has determined first resonance frequency, and the size of described corner cut has determined second resonance frequency;
Parallel twin lead, have two, with the first twin lead (31) and the second twin lead (32) expression, be a kind of two-wire line that is printed on respectively the positive and negative two sides of described printed circuit board (PCB) (2), it adopts the grading structure of the impedance transformation of 50-100 Ω; Described the first twin lead (31) one ends are fed to the lower metal arm (112) of the first dipole array element (11), and the other end is fed to second little band short-circuit line (42); Described the second twin lead (32) one ends are fed to the upper metal arm (121) of the second dipole array element (12), and the other end is fed to first little band short-circuit line (41), form the network of parallel feed, guarantee in the same way feed of two dipole array elements;
Little band short-circuit line, have two, with first little band short-circuit line (41) and the expression of second little band short-circuit line (42), be printed on respectively the anti-of described printed circuit board (PCB), positive two sides, one end of described first little band short-circuit line (41) is connected to the second twin lead (32), the other end is connected to the upper metal arm (111) of the first dipole array element (11) of the positive described corner cut of printed circuit board (PCB) (2) by short circuit through hole (61), one end of described second little band short-circuit line (42) is connected to the first twin lead (31), and the other end is connected to the lower metal arm (122) of the second dipole array element (12) of the described corner cut of printed circuit board (PCB) (2) reverse side by short circuit through hole (62); Described two the dipole array elements of described little length adjustment with short-circuit line (11,12) separately successively and the impedance matching between described parallel two twin leads (31,32);
Half steel coaxial feeder (5), its outer conductor is welded on first twin lead (31) in front of described printed circuit board (PCB) (2), inner wire is connected on second twin lead (32) of reverse side by the through hole (63) at printed circuit board (PCB) (2) center, forms the distributing point of described twin lead (3).
2. according to the co-feeding omni-directional antenna arrays of GSM850/DCS/PCS three frequency ranges claimed in claim 1, it is characterized in that: the outer conductor of half steel coaxial feeder (5) is welded on positive the first twin lead (31) of described printed circuit board (PCB) (2); Second little band short-circuit line (42) that the first twin lead (31) connects extends to the printed circuit board (PCB) bottom, and joins by the lower metal arm (122) of a succession of through hole and the second dipole array element (12).
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| CN 201010209643 CN101888017B (en) | 2010-06-17 | 2010-06-17 | Shunt-type omnidirectional antenna array of three frequency bands of GSM (Global System for Mobile Communications) 850/DCS (Digital Communication Service)/PCS (Personal Communication Service) |
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| CN 201010209643 CN101888017B (en) | 2010-06-17 | 2010-06-17 | Shunt-type omnidirectional antenna array of three frequency bands of GSM (Global System for Mobile Communications) 850/DCS (Digital Communication Service)/PCS (Personal Communication Service) |
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| CN102800940B (en) * | 2011-05-31 | 2015-05-27 | 深圳光启创新技术有限公司 | Antenna and multiple input multiple output (MIMO) antenna with same |
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| CN102800935B (en) * | 2011-05-31 | 2015-05-27 | 深圳光启高等理工研究院 | Mobile phone |
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| CN106816695B (en) * | 2016-11-29 | 2019-09-27 | 广东通宇通讯股份有限公司 | Three frequency range high-gain omnidirectional dipole antennas |
| CN106684564A (en) * | 2016-12-09 | 2017-05-17 | 上海斐讯数据通信技术有限公司 | High-gain antenna |
| CN106941210A (en) * | 2017-02-23 | 2017-07-11 | 广东通宇通讯股份有限公司 | Super-wide band high-gain omnidirectional antenna and its ultra wide band oscillator unit |
| CN107611608A (en) * | 2017-09-14 | 2018-01-19 | 广东曼克维通信科技有限公司 | antenna element and array antenna |
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| CN101383446A (en) * | 2008-10-21 | 2009-03-11 | 厦门大学 | Archimedes spiral antenna of graded dielectric constant with three frequency light quantum band-gap |
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