CN104393422A - Multi-frequency array antenna - Google Patents
Multi-frequency array antenna Download PDFInfo
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- CN104393422A CN104393422A CN201410654495.XA CN201410654495A CN104393422A CN 104393422 A CN104393422 A CN 104393422A CN 201410654495 A CN201410654495 A CN 201410654495A CN 104393422 A CN104393422 A CN 104393422A
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Abstract
The invention discloses a multi-frequency array antenna, comprising a metal reflection plate, a low-frequency radiation array arranged on the metal reflection plate and made up of at least one low-frequency radiation unit and a high-frequency radiation array made up of at least one high-frequency radiation unit, wherein one axis parallel with the lengthwise direction of the metal reflection plate is defined; at lease one low-frequency radiation array is arranged along the axis direction; the low-frequency radiation unit comprises at least one radiation arm; and the high-frequency radiation unit is arranged above the radiation arm of the low-frequency radiation unit and/or between two low-frequency radiation units. The multi-frequency array antenna disclosed by the invention has the advantages of effective reduction of transverse dimension, excellent electrical performance, convenient installation and high reliability.
Description
Technical field
The present invention relates to a kind of mobile communication antenna technology, particularly relate to a kind of multi-frequency array antenna.
Background technology
Along with the progressively acceleration that forth generation mobile communications network is built, each operator starts to seek can 2G and the 3G standard such as backward compatible GSM800, GSM900, DCS1800, PCS, CDMA1800, CDMA2000 and can the ultra-wideband antenna of the 4G standard such as upward-compatible LTE700, LTE2600.And build a station cost because the antenna for base station of more a little radiating aperture multiband ultra broadband of active demand of many difficulties operator when addressing is built a station reduces and improve aerial radiation actinal surface utilization ratio.The present invention sets out thus, provide a kind of undersized ultra wideband multi-band array antenna, this antenna and other antennas of designing according to this Principle of Antenna can be able to realize three frequently in minimum sectional dimension, four frequently, the Miniaturization Design of even six antennas frequently, there is extremely wide application prospect.
One of prior art: Kathrein-Werke KG company discloses a kind of miniature antenna method for designing (US2006/00114168A1) of nesting method, but the method cannot reduce further in size under three and above independence electric frequency modulation section use situation.Prior art two: the publication No. disclosed in Huawei Company is give another kind of mentality of designing in CN103050788A patent, by high frequency antenna is placed in low frequency radiation armlet, reach the object reducing integrated antenna size, but its high frequency radiation characteristic is limited by the low frequency radiation arm be centered around around high frequency radiating element, is difficult to accomplish optimum.
Summary of the invention
The object of the invention is, for overcoming the deficiencies in the prior art, providing the array antenna that a kind of multiband shares.
For reaching above technical purpose, the technical solution used in the present invention is as follows:
A kind of multi-frequency array antenna, the low frequency radiation array be made up of at least two low frequency radiating element comprising metallic reflection plate and be arranged on this metallic reflection plate and the high frequency radiation array be made up of at least one high frequency radiating element, wherein, define an axis parallel with the longitudinally of described metallic reflection plate, described at least one, low frequency radiation array is arranged along described axis direction; Described low frequency radiating element comprises at least one radiation arm, between the top that described high frequency radiating element is arranged on the radiation arm of described low frequency radiating element and/or two described low frequency radiating element.
About spacing: the spacing of two adjacent described low frequency radiating element is 0.82 ~ 0.95 times of low frequency operation frequency range center frequency point corresponding wavelength; The spacing of two adjacent described high frequency radiating element is 0.7 ~ 0.85 times of high-frequency work frequency range center frequency point corresponding wavelength.
Arranged direction about high frequency radiation array: the described axis through the central point of described low frequency radiating element is defined as first axle; The position stacked for described high frequency radiating element in the radiation arm of described low frequency radiating element is defined as superposition place, described superposition place is arranged in described first axle both sides, and the described axis through multiple superposition place in described first axle the same side is defined as the second axis and/or the 3rd axis; Described high frequency radiation array is along described second axis and/or the 3rd axis arranged; The multiple high frequency radiating element belonging to same high frequency radiation array are arranged along described second axis or the 3rd axis direction.
Superposition about low frequency radiating element and high frequency radiating element is arranged: exist between the radiation arm of the described low frequency radiating element of overlaying relation and high frequency radiating element and be provided with insulator.
Structure about low frequency radiating element: described low frequency radiating element comprises four ± 45 ° orthogonal, centrosymmetric radiation arms.
Further, described radiation arm is hollow out body.Described high frequency radiating element is arranged on the top of the hollow out position of the radiation arm of described low frequency radiating element.
Further, the height of described low frequency radiating element is no more than 1/8 of wavelength corresponding to this array antenna low frequency frequency.
Structure about high frequency radiating element: described high frequency radiating element comprises high frequency radiation body and is enclosed in the external reflector of described high frequency radiation, described reflector upper end open, and lower end covers with described insulator or is connected.
Described high frequency radiation body comprises high frequency radiation arm and this high frequency radiation arm is played to the Ba Lun of support and feed effect, and described high frequency radiating element is fixed on the radiation arm of described low frequency radiating element with described Ba Lun.
Compared with prior art, the present invention has following advantage:
(1) high frequency radiating element is superimposed upon on the radiation arm of low frequency radiating element, the lateral dimension of this array antenna can be effectively reduced, and do not affect the radiation characteristic of this array antenna;
(2) engraved structure is set at the radiation arm of low frequency radiating element, high frequency radiating element is overlayed above this engraved structure, and isolated with insulator, influencing each other between low frequency radiation array and high frequency radiation array can be reduced;
(3) reflector is set the high frequency radiation of high frequency radiating element is external, this reflector forms the radiation border of high frequency radiating element, not only can reduce the interference between high frequency radiation array and low frequency radiation array further, also be convenient to carry out feed to high frequency radiating element;
(4) other many axis of the first axle formed based on low frequency radiation array, as the layout baseline of high frequency radiation array, make the radiating curtain that this array antenna can be arranged multiple frequency range, realize the broadband of this array antenna, multiband communication.
Accompanying drawing explanation
Fig. 1 is the plan structure figure of multi-frequency array antenna first embodiment of the present invention, and wherein, this array antenna comprises a low frequency radiation array and two high frequency radiation arrays.
Fig. 2 is the plan structure figure of multi-frequency array antenna second embodiment of the present invention, and wherein, this array antenna comprises a low frequency radiation array and a high frequency radiation array.
Fig. 3 is the plan structure figure of multi-frequency array antenna of the present invention 3rd embodiment, and wherein, the high frequency radiating element between two low frequency radiating element departs from first axle and arranges.
Fig. 4 is the lateral plan of multi-frequency array antenna of the present invention, shows the setting of the high frequency radiating element be positioned on low frequency radiating element radiation arm, and the setting of high frequency radiating element between two low frequency radiating element.
Fig. 5 is the lateral plan of multi-frequency array antenna of the present invention, shows the structure of the high frequency radiating element be positioned on low frequency radiating element radiation arm, and wherein the high frequency radiation body surface of dotted line shows that this high frequency radiation body is surrounded by reflector.
Fig. 6 is the plan structure figure of the low frequency radiating element of multi-frequency array antenna of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment one
Low frequency radiation array and the layout of high frequency radiation array on metallic reflection plate
Please refer to Fig. 1 ~ 3, described array antenna comprises metallic reflection plate 1, and the low frequency radiation array 2 be arranged on this metallic reflection plate 1 and high frequency radiation array 3 and 4.Described low frequency radiation array 2 comprises at least one low frequency radiating element 21; Described high frequency radiation array 3 and 4 comprises at least one high frequency radiating element respectively.
As shown in Figures 1 to 3, described metallic reflection plate 1 is that the practical application adapting to mobile communication antenna is set to lengthwise rectangle usually, low frequency radiating element 21 described in several arranges along the longitudinally of described metallic reflection plate 1, defines first axle (not shown) thus: parallel with metallic reflection plate 1 longitudinally, through the axis of the central point of low frequency radiating element described in several 21.With reference to figure 6, described low frequency radiating element 21 is provided with four radiation arms 211, and wherein each described radiation arm 211 is provided with superposition place 212 be placed on it for a described high frequency radiating element; Four on a described low frequency radiating element described superpositions place 212 are distributed in described first axle both sides, and namely described first axle is not through arbitrary described superposition place 212.Preferably, be arranged on same straight line in described superposition place 212 belonging to multiple described low frequency radiating element of described first axle the same side, define the second axis or the 3rd axis (not shown) thus: through the axis of multiple described superposition place 212 in described first axle the same side.Described second axis is parallel with described first axle with the 3rd axis.The spacing of two adjacent described low frequency radiating element is 0.82 ~ 0.95 times of low frequency operation frequency range center frequency point corresponding wavelength.
With reference to figure 1 ~ 4, described high frequency radiation array 3 with 4 composition with arrange similar, for described high frequency radiation array 3, in this high frequency radiation array 3, comprise two kinds of high frequency radiating element: a kind of is the high frequency radiating element 3A overlaying described low frequency radiating element superposition place 212; Another kind is arranged on the high frequency radiating element 3B between two adjacent low frequency radiating element 21, and described high frequency radiating element 3B is arranged on described metallic reflection plate 1, with the coplanar setting of described low frequency radiating element 21.As shown in Figure 1, when this array antenna comprises described high frequency radiation array 3 and 4, described high frequency radiation array 3 and 4 is respectively along described second axis and the 3rd axis arranged; As shown in Figure 2, if this array antenna only comprises a high frequency radiation array (high frequency radiation array 3 or 4), then this high frequency radiation array is alternatively arranged on described second axis or the 3rd axis.The spacing of two adjacent described high frequency radiating element is 0.7 ~ 0.85 times of high-frequency work frequency range center frequency point corresponding wavelength.
In addition, as shown in Figure 3, according to the design needs of mobile communication antenna, described high frequency radiating element 3B or 4B can be arranged on the position of the second axis or the 3rd axis departing from its place, described high frequency radiating element 3B or 4B departing from setting can be arranged near described first axle, also can arrange away from described first axle.
Aforesaid low frequency radiation array 2 and the arrangement of high frequency radiation array 3 and 4 on metallic reflection plate 1 effectively reduce antenna cross sectional dimensions simultaneously, also signal disturbing between the two can be reduced, those skilled in the art should know, control low frequency radiating element and high frequency radiating element arrangement can change flexibly according to Principle of Antenna, implementation can have multiple, is not limited to aforesaid structure.
Embodiment two
The structure of low frequency radiating element and high frequency radiating element
For high frequency radiating element 3A and 3B, the structure of this high frequency radiating element is described in detail.
With reference to figure 4 and Fig. 5, the structure of described high frequency radiating element 3A with 3B is identical: comprise high frequency radiation body 31, reflector 32 and dielectric layer 33.Described high frequency radiation body 31 realizes transmission and/or the reception of high frequency radiation signal; Described reflector 32 is enclosed in this high frequency radiation body 31 surrounding, form the radiation border of this high frequency radiation body 31, and reflection cavity is formed around described high frequency radiation body 31, in order to control transmission and/or the receive direction of high frequency radiation signal, in the present embodiment, described reflector 32 upper end open, lower end closes, and the bore of the upper end of reflector 32 is greater than the bore of its lower end; The end view of the described array antenna shown in composition graphs 5, and the vertical view of the described array antenna of Fig. 1 ~ 3, this reflector 32 known is inverted trapezoidal platform structures.Please refer again to Fig. 1 ~ 3 and Fig. 5, in order to improve high frequency radiation performance and the circuit performance of described high frequency radiating element 3A and 3B, this high frequency radiating element 3A and 3B also comprises the dielectric layer 33 of the frame-like be arranged on above described reflector 32 upper end-face edge, described dielectric layer 33 has certain thickness, above the upper end-face edge being supported on described reflector 32 with plastic stent 34, described dielectric layer 33 keeps certain clearance distance with the upper end-face edge of reflector 32.
Further, mutually disturb for preventing described high frequency radiating element 3A and the low frequency radiating element below it 21, between described high frequency radiating element 3A and low frequency radiating element 21, be provided with insulating barrier 5, this insulating barrier 5 covers mutually with the lower end of described reflector 32 or is connected.
As the alternate embodiments of described insulating barrier 5, described high frequency radiation body 31 can comprise high frequency radiation arm (sign) and this high frequency radiation arm be played to the Ba Lun (sign) of support and feed effect, and described high frequency radiating element 3A is fixed on the radiation arm of described low frequency radiating element with described Ba Lun.
The working frequency range of described low frequency radiating element 21 is 698 ~ 960MHz, and it is highly no more than 1/8 of wavelength corresponding to this array antenna low frequency frequency.With reference to the vertical view of the preferred described low frequency radiating element 21 shown in figure 6, illustrate the radiating surface (sign) of described low frequency radiating element 21, described radiating surface is made up of four centrosymmetric radiation arms 211, be specially the radiation arm 211 that four elementary contours are rectangle, described radiation arm 211 is orthogonal with ± 45 °, and therefore described radiating surface is also rectangular; Further, the outline angle of the radiating surface of described rectangle outwardly arranges the engraved structure of rectangle, and this engraved structure is superposition place 212 that the described high frequency radiating element 3A of aforesaid confession stacks.As an example, the radiating surface of described low frequency radiating element 21 can be printed on insulation board, and described superposition place 212 is exposed insulation board part, and described high frequency radiating element 3A is directly fixed on aforementioned dielectric plate.Described exposed insulation board part achieves the insulation function of described insulating barrier 5.
According to designing requirement, described low frequency radiating element 21 relies on the edge of its radiating surface to carry out radiation, meanwhile, the radiation direction including the high frequency radiating element 3A of described reflector 32 overlayed on this low frequency radiating element 21 is subject to the constraint of described reflector 32, point to assigned direction, therefore the signal of described low frequency radiating element 21 and high frequency radiating element 3A radiation does not interfere with each other, and can realize the optimization of the performance of multiband radiation, reduces the lateral dimension of whole array antenna simultaneously.
In sum, small size ultra wideband multi-band section array antenna of the present invention effectively reduces lateral dimension, and electric property is superior, easy for installation, and reliability is high.
Above-described embodiment is the present invention's preferably execution mode; but be not merely restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be all included within protection scope of the present invention.
Claims (10)
1. a multi-frequency array antenna, the low frequency radiation array be made up of at least two low frequency radiating element comprising metallic reflection plate and be arranged on this metallic reflection plate and the high frequency radiation array be made up of at least one high frequency radiating element, it is characterized in that: define one with the parallel longitudinal axis of described metallic reflection plate, described at least one, low frequency radiation array is arranged along described axis direction; Described low frequency radiating element comprises at least one radiation arm, and described high frequency radiating element is arranged between the top of the radiation arm of described low frequency radiating element and two described low frequency radiating element.
2. multi-frequency array antenna as claimed in claim 1, is characterized in that: the spacing of two adjacent described low frequency radiating element is 0.82 ~ 0.95 times of low frequency operation frequency range centre frequency corresponding wavelength; The spacing of two adjacent described high frequency radiating element is 0.7 ~ 0.85 times of high-frequency work frequency range center frequency point corresponding wavelength.
3. the multi-frequency array antenna as described in claim 1 and 2, is characterized in that: the described axis through the central point of described low frequency radiating element is defined as first axle; The position stacked for described high frequency radiating element in the radiation arm of described low frequency radiating element is defined as superposition place, described superposition place is arranged in described first axle both sides, and the described axis through multiple superposition place in described first axle the same side is defined as the second axis and the 3rd axis; The multiple high frequency radiating element belonging to same high frequency radiation array are arranged along described second axis or the 3rd axis direction.
4. multi-frequency array antenna as claimed in claim 3, is characterized in that: exist between the radiation arm of the described low frequency radiating element of overlaying relation and high frequency radiating element and be provided with insulator.
5. multi-frequency array antenna as claimed in claim 1 or 2, is characterized in that: described low frequency radiating element comprises four ± 45 ° orthogonal, centrosymmetric radiation arms.
6. multi-frequency array antenna as claimed in claim 5, is characterized in that: described radiation arm is hollow out body.
7. multi-frequency array antenna as claimed in claim 6, is characterized in that: described high frequency radiating element is arranged on the top of the hollow out position of the radiation arm of described low frequency radiating element.
8. multi-frequency array antenna as claimed in claim 4, is characterized in that: the height of described low frequency radiating element is no more than 1/8 of wavelength corresponding to this array antenna low frequency frequency.
9. multi-frequency array antenna as claimed in claim 4, is characterized in that: described high frequency radiating element comprises high frequency radiation body and is enclosed in the external reflector of described high frequency radiation, described reflector upper end open, and lower end covers with described insulator or is connected.
10. multi-frequency array antenna as claimed in claim 9, it is characterized in that: described high frequency radiation body comprises high frequency radiation arm and this high frequency radiation arm played to the Ba Lun of support and feed effect, and described high frequency radiating element is fixed on the radiation arm of described low frequency radiating element with described Ba Lun.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410654495.XA CN104393422B (en) | 2014-11-17 | 2014-11-17 | Multi-frequency array antenna |
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| CN201410654495.XA CN104393422B (en) | 2014-11-17 | 2014-11-17 | Multi-frequency array antenna |
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| CN104393422A true CN104393422A (en) | 2015-03-04 |
| CN104393422B CN104393422B (en) | 2018-05-01 |
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Cited By (7)
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| CN104795635A (en) * | 2015-04-03 | 2015-07-22 | 京信通信技术(广州)有限公司 | Multifrequency array antenna |
| CN107359415A (en) * | 2017-06-08 | 2017-11-17 | 京信通信系统（中国）有限公司 | Multifrequency antenna |
| TWI625894B (en) * | 2016-08-12 | 2018-06-01 | 耀登科技股份有限公司 | Mimo antenna device and antenna array |
| CN109768395A (en) * | 2018-12-24 | 2019-05-17 | 华南理工大学 | Multi-frequency array antenna and group array element |
| CN111937240A (en) * | 2018-01-24 | 2020-11-13 | 约翰梅扎林加瓜联合有限责任公司D/B/A Jma无线 | Fast roll-off antenna array surface with heterogeneous antenna arrangement |
| CN112164864A (en) * | 2020-08-21 | 2021-01-01 | 西安朗普达通信科技有限公司 | Base station antenna nested array structure for raising high-frequency oscillator |
| CN114221140A (en) * | 2021-12-30 | 2022-03-22 | 京信通信技术(广州)有限公司 | Multi-frequency omnidirectional antenna |
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| CN109768395A (en) * | 2018-12-24 | 2019-05-17 | 华南理工大学 | Multi-frequency array antenna and group array element |
| CN112164864A (en) * | 2020-08-21 | 2021-01-01 | 西安朗普达通信科技有限公司 | Base station antenna nested array structure for raising high-frequency oscillator |
| CN114221140A (en) * | 2021-12-30 | 2022-03-22 | 京信通信技术(广州)有限公司 | Multi-frequency omnidirectional antenna |
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| CN104393422B (en) | 2018-05-01 |
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