CN205900780U - Compact multifrequency base station antenna array - Google Patents
Compact multifrequency base station antenna array Download PDFInfo
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- CN205900780U CN205900780U CN201620816142.XU CN201620816142U CN205900780U CN 205900780 U CN205900780 U CN 205900780U CN 201620816142 U CN201620816142 U CN 201620816142U CN 205900780 U CN205900780 U CN 205900780U
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Abstract
The utility model discloses a compact multifrequency base station antenna array, including setting up first subarray and the second subarray on the base plate, first subarray work is in first frequency channel, the work of second subarray is in being different from the second frequency channel of first frequency channel, first subarray contains the first filtering antenna element of at least one nothing plus losser circuit, the second subarray contains the second filtering antenna element of at least one nothing plus losser circuit. The utility model provides an embodiment, through the application do not have plus the filtering antenna element of losser circuit as the array of multifrequency base station antenna array, can utilize its filter characteristic to reduce the intercoordination of between close a plurality of subarrays of working frequency band, need not to design the duplexer or removing coupling network, reduced the complexity that the design duplexer perhaps went coupling network to bring, circuit structure is simple, and the design is simple and convenient, and can adopt low -priced PCB technical processing, and the cost is lower.
Description
Technical field
The utility model is related to moving communicating field, more particularly, to a kind of compact multifrequency base-station antenna array.
Background technology
Developing rapidly with mobile communication technology, often requires that in antenna for base station construction array antenna can not only cover
Cover multiple frequency ranges, and the system of multiple wireless standards can be supported.When designing double frequency or multifrequency base station array antenna, such as
The frequency interval of fruit different frequency range is very big, such as gsm frequency range (820-960mhz) and 3g frequency range (1710-2170mhz), at this moment,
Conventional two row are operated in the subarray array of designs arranged together antenna of corresponding band respectively.However, once two kinds of wireless frequencies
Section frequency interval close, such as dcs frequency range (1710-1880mhz) and wcdma frequency range (1920-2170mhz), subarray it
Between intercouple very big, can only be intercoupled by increasing the spacing between two subarrays and reduce, increase port every
From degree.And the spacing increasing between subarray means that the volume increasing array antenna.
In engineering application, the closely spaced double frequency base station array such as dcs (1710-1880mhz) of design frequency and wcdma
(1920-2170mhz) frequency range, conventional method has two kinds, and one is to cover dcs and wcdma whole frequency range (1710- with row
Antenna element 2170mhz) forms an array, cascades a duplexer in front end, by designing the duplexer of high-isolation
Come the uncoupling to be operated between frequency range, concrete document such as " x.-h.guan, f.-q.yang, h.-w.liu, and l.-
zhu,“compact and high isolation diplexer using dual-mode stub-loaded
resonators”,ieee microw.wireless compon.lett.vol.24,no.6,pp.385-387,
jun.2014》.However, duplexer will necessarily bring cascade loss, the gain of impact antenna, and because frequency range is close, design
The duplexer of filter with low insertion loss high-isolation has very big challenge.In addition, this kind of scheme simply uses an array, therefore
Each frequency range cannot be carried out during WLAN optimization with independent electricity and adjust angle of declination.Second method is to use two
Row cover the subarray parallel arranged of whole frequency range (1710-2710mhz), add uncoupling network between two subarrays,
Thus reaching the effect of uncoupling.These uncoupling networks include electromagnetism wall (bibliography as " r.-i.eva, q.-t.oscar,
and i.-s.luis,“mutual coupling reduction in patch antenna arrays by using a
planar ebg structure and a multilayer dielectric substrate,”ieee
Trans.antennas propag., vol.56, no.6, pp.1648-1655, jun.2008 "), defect ground structure is (with reference to literary composition
Offer as " n.-h.noordin, a.rayis, n.haridas, b.flynn, a.erdogan, and t.arslan,
“triangular lattices for mutual coupling reduction in patch antenna arrays,”
In proc.loughborough.conf.antennas propag, 2011, pp.1-4 "), band resistance resonant element (bibliography
As " c.-y.chiu, c.-h.cheng, r.-d.murch, and corbett r.rowell, " reduction of mutual
coupling between closely-packed antenna elements,”ieee trans.antennas
Propag., vol.55, no.6, pp.1732-1738, jun.2007 ") etc..However, these uncoupling networks can increase antenna
The width of array, also can affect the radiance such as radiation efficiency of antenna, in front and back than, gain etc..
Utility model content
Technical problem to be solved in the utility model is, provides a kind of compact multifrequency base-station antenna array, overcomes
In prior art, multifrequency base station couples big or baroque defect each other.
In order to solve above-mentioned technical problem, the utility model provides a kind of compact multifrequency base-station antenna array, including
It is arranged at the first subarray on substrate and the second subarray, described first subarray works in the first frequency range, described second son
Array works in the second frequency range different from described first frequency range, and described first subarray comprises at least one no additional loss electricity
The first filter antenna unit on road, described second subarray comprises the second filter antenna list of at least one no additional losser circuit
Unit.
Wherein, described first filter antenna unit and described second filter antenna unit all include medium substrate, lower Jie
Matter substrate, it is arranged at the parasitic radiation metal patch of described upper medium substrate upper surface, is arranged at described lower medium substrate upper table
The primary radiation metal patch in face and the metal floor being arranged at described lower medium substrate lower surface, described primary radiation metal patch
Be provided with the asymmetrical e font line of rabbet joint at the geometric center position of piece, described primary radiation metal patch and described metal floor it
Between be connected with short circuit metal probe.
Wherein, the middle line of rabbet joint of the described asymmetrical e font line of rabbet joint is the shortest, and the line of rabbet joint positioned at described middle line of rabbet joint side is long
The line of rabbet joint in opposite side.
Wherein, described first subarray is parallel with described second subarray is staggered.
Wherein, spacing distance and described second son between the first adjacent filter antenna unit in described first subarray
Between the second adjacent filter antenna unit in array, spacing distance is equal.
Wherein, described first filter antenna unit and described second filter antenna unit also include plastic support post, described
Upper medium substrate is fixedly connected by described plastic support post with described lower medium substrate.
Wherein, described lower medium substrate is additionally provided with the feed port through described metal floor.
Wherein, described first subarray comprises the first filter antenna unit of 6 no additional losser circuits, described second son
Array comprises the second filter antenna unit of 6 no additional losser circuits.
Wherein, described first frequency range is dcs frequency range, and described second frequency range is wcdma frequency range.
Wherein, described substrate both sides are provided with metal baffle.
The utility model has the advantages that many by being used as with the filter antenna unit of no additional losser circuit
In a period of time of frequency base-station antenna array, may be implemented in high efficient radiation in band, band is outer effectively to be suppressed, and the passband edges of gain roll-off very
Hurry up, thus just can reduce intercoupling between the close multiple subarrays of working frequency range using this filtering characteristic；Need not set
Meter duplexer or uncoupling network, reduce the complexity that design duplexer or uncoupling network bring, circuit structure letter
Single, design is easy, and can be using cheap pcb technology processing, and cost is relatively low.
Brief description
Fig. 1 is the top view of the compact dual-frequency base station antenna array that the utility model embodiment provides；
Fig. 2 is the configuration schematic diagram of the filter antenna unit that the utility model embodiment provides；
Fig. 3 is the side view of the filter antenna unit shown in Fig. 2；
Fig. 4 is the top view of the filter antenna unit shown in Fig. 2；
Fig. 5 is the upward view of the filter antenna unit shown in Fig. 2；
Fig. 6 is the filtering sky of the no additional losser circuit being operated in dcs frequency range that one embodiment of the utility model provides
The simulation result figure of the reflectance factor s11- frequency of line unit；
Fig. 7 is the filtering sky of the no additional losser circuit being operated in dcs frequency range that one embodiment of the utility model provides
The simulation result figure of the gain curve-frequency of line unit；
Fig. 8 is the filtering of the no additional losser circuit being operated in wcdma frequency range that one embodiment of the utility model provides
The simulation result figure of the reflectance factor s11- frequency of antenna element；
Fig. 9 is the filtering of the no additional losser circuit being operated in wcdma frequency range that one embodiment of the utility model provides
The simulation result figure of the gain curve-frequency of antenna element；
Figure 10 is the reflectance factor s11- frequency of the subarray being operated in dcs frequency range that one embodiment of the utility model provides
The simulation result figure of rate；
Figure 11 is the gain curve-frequency of the subarray being operated in dcs frequency range that one embodiment of the utility model provides
Simulation result figure；
Figure 12 is the reflectance factor s11- of the subarray being operated in wcdma frequency range that one embodiment of the utility model provides
The simulation result figure of frequency；
Figure 13 is the gain curve-frequently of the subarray being operated in wcdma frequency range that one embodiment of the utility model provides
The simulation result figure of rate；
Figure 14 is two sub- matrix ports of compact dual-frequency base station antenna array that one embodiment of the utility model provides
Isolation curve s12- frequency analogous diagram；
Figure 15 is e- at 1.8ghz for the compact dual-frequency base station antenna array that provides of one embodiment of the utility model
The main polarization and cross polarization radiations directional diagram in face；
Figure 16 is h- at 1.8ghz for the compact dual-frequency base station antenna array that provides of one embodiment of the utility model
The main polarization and cross polarization radiations directional diagram in face；
Figure 17 is e- at 2.06ghz for the compact dual-frequency base station antenna array that provides of one embodiment of the utility model
The main polarization and cross polarization radiations directional diagram in face；
Figure 18 is h- at 2.06ghz for the compact dual-frequency base station antenna array that provides of one embodiment of the utility model
The main polarization and cross polarization radiations directional diagram in face.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely description is it is clear that described embodiment is only a part of embodiment of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of making creative work
The every other embodiment being obtained, broadly falls into the scope of the utility model protection.
The utility model embodiment provides a kind of compact multifrequency base-station antenna array, many on substrate including being arranged at
Individual subarray, the such as first subarray, second subarray ... the n-th subarray (n >=2, n is natural number).Wherein first submatrix
Row work in the first frequency range, and the second subarray works in the second frequency range ... ..., and the n-th subarray works in the n-th frequency range, and first
Frequency range, second frequency range ... the n-th frequency range is close but differs.First subarray comprises the of at least one no additional losser circuit
One filter antenna unit, described second subarray comprises the second filter antenna list of at least one no additional losser circuit
Unit ... ..., the n-th subarray comprises the n-th filter antenna unit of at least one no additional losser circuit.By using no additional damage
The filter antenna unit on power consumption road, as a period of time of multifrequency base-station antenna array, may be implemented in high efficient radiation in band, and band is outer effectively
Suppression, the passband edges of gain roll-off quickly, thus just can reduce close multiple of working frequency range using this filtering characteristic
Intercoupling between subarray；Duplexer or uncoupling network need not be designed, reduce design duplexer or uncoupling net
The complexity that network brings, circuit structure is simple, and design is easy, and can be using cheap pcb technology processing, and cost is relatively low.
For the ease of description, hereafter all will illustrate with accompanying drawing that the utility model is implemented taking dual-frequency base station antenna array as a example
Example provide aerial array mechanism it should be appreciated that the utility model embodiment is not limited to dual-frequency base station antenna array,
And all multifrequency base-station antenna array possessing the utility model feature should be comprised.
Refer to Fig. 1, be the top view of the compact dual-frequency base station antenna array that the utility model embodiment provides.This sky
Linear array includes the first subarray 2 being arranged on substrate 4 and the second subarray 3, and the first subarray 2 works in the first frequency range,
Second subarray 3 works in the second frequency range, and wherein, the first frequency range is close from the second frequency range but different, and the such as first frequency range is dcs
Frequency range (1710-1880mhz), the second frequency range is wcdma frequency range (1920-2170mhz), certainly enumerates this two frequency ranges and is only used for
Illustrate, rather than limit.First subarray 2 comprises the first filter antenna list of at least one no additional losser circuit
Unit, described second subarray 3 comprises the second filter antenna unit of at least one no additional losser circuit, and filter antenna unit is originally
The filtering characteristic that body has is so that intercoupling between two row subarrays greatly reduces.Because operating frequency is different, first
The size of filter antenna unit and the second filter antenna unit is also different, in the embodiment shown in fig. 1, the first big filter of size
Wave antenna cell operation is in the first relatively low frequency range of frequency (such as dcs frequency range), the second little filter antenna cell operation of size
In the second higher frequency range of frequency (such as wcdma frequency range).The size of substrate 4 can also be entered according to the quantity of subarray and scale
Row setting, such as, in the embodiment of dual-frequency base station antenna array shown in Fig. 1, substrate 4 is that a block length width height is respectively
The pcb medium substrate of 853mm, 206mm, 3mm, by the bottom surface print copper of this pcb medium substrate and tin plating anti-oxidation Lai
Form metal floor.Pcb medium substrate can be formed with the materials processing that relative dielectric constant ε r=2.65, thickness are 2-4mm.
Preferably, as shown in figure 1, the both sides of substrate 4 are provided with metal baffle 1, metal baffle 1 can use metal aluminum sheet system
Become.In example as shown in Figure 1, the first subarray 2 and the second subarray 3 are operated in dcs frequency range and wcdma frequency range respectively,
The height of metal baffle 1 is 8mm.
Preferably, as shown in figure 1, the first subarray 2 is parallel with the second subarray 3 is staggered.Specifically, as Fig. 1 institute
Show, the first subarray 2 and the second subarray 3 are parallel to each other in a first direction, and in the second direction vertical with first direction
Upper interlaced, this arrangement mode is with respect to traditional parallel alignment arrangement mode, by increasing capacitance it is possible to increase the first subarray 2 and second
The distance between subarray 3, thus further reducing intercoupling between subarray, obtains more preferable isolation effect.
Preferably, as shown in figure 1, between the first adjacent filter antenna unit in the first subarray 2 spacing distance a with
Between the second adjacent filter antenna unit in second subarray 3, spacing distance b is equal, for example, in the first filter antenna list
When the working frequency range of unit and the second filter antenna unit is respectively dcs frequency range and wcdma frequency range, a=b=130mm.
Preferably, as shown in figure 1, the first subarray 2 comprises 6 the first filter antenna units, the second subarray 3 comprises 6
Individual second filter antenna unit.
Describe the structure of the first filter antenna unit and the second filter antenna unit below with reference to Fig. 2-5 in detail.First
, in addition to size difference, structure is essentially identical for filter antenna unit and the second filter antenna unit.Describe for convenience, hereafter join
Examine in the illustration of Fig. 2-5, unification represents the first filter antenna unit and the second filter antenna using filter antenna unit
Unit.
As shown in Figures 2 and 3, filter antenna unit all includes medium substrate 6, lower medium substrate 11 and is used for connecting Jie
Matter substrate 6 and the bindiny mechanism of lower medium substrate 11.It is provided with parasitic radiation metal patch 7 on the upper surface of upper medium substrate 6,
Primary radiation metal patch 10 is provided with the upper surface of lower medium substrate 11, the lower surface of lower medium substrate 11 is provided with metal
Floor 14, parasitic radiation metal patch 7, primary radiation metal patch 10 and metal floor 14 are the coat of metal.Primary radiation metal
It is connected with short circuit metal probe 12 between paster 10 and metal floor 14.Specifically, as shown in Fig. 2,3,5, it is provided with three gold
Belong to probe 12, its a diameter of 1mm.It is provided with the asymmetrical e font line of rabbet joint at the geometric center position of primary radiation metal patch 10
13.Specifically, as shown in Fig. 2,3,5, the middle line of rabbet joint of the described asymmetrical e font line of rabbet joint is the shortest, positioned at the described middle line of rabbet joint
The line of rabbet joint of side is longer than the line of rabbet joint of opposite side, and this e font line of rabbet joint can produce a spoke at the low frequency edge of gain curve passband
Penetrate zero point.
Preferably, as shown in Figure 2-5, filter antenna unit includes plastic support post 8, described upper medium substrate 6 and described
Lower medium substrate 11 is connected by described plastic support post 8 and is fixed as upper and lower Rotating fields.Specifically, as shown in figure 3, in plastics
Support column 8 has four, all has four vias 5, for connecting plastic support at the corner of upper medium substrate 6 and lower medium substrate 11
Post 8.Upper medium substrate 6 is fixed on above lower medium substrate by plastic support post 8, forms certain interval, suitable tune
Save this spacing, a high frequency radiation zero point can be produced on the right side of passband.All there is a radiation zero the low-and high-frequency side of so passband
Point is it is ensured that the bandpass characteristics of filter antenna.
Preferably, lower medium substrate 11 is additionally provided with the feed port 9 through metal floor 14.
In an one exemplary embodiment of the present utility model, two working frequency range are had to be respectively dcs frequency range and wcdma frequency
The filter antenna unit of the no additional losser circuit of section, this two filter antenna units all using the circuit structure shown in Fig. 2, by
Different in working frequency range, so specific circuit size is different, the filter antenna unit of its corresponding no additional losser circuit
Circuit design size is as shown in table 1 below:
Table 1dcs frequency range and the circuit size of wcdma frequency range filter antenna unit
In this embodiment, the frequency interval of working frequency range 1710-1880mhz and 1920-2170mhz of two subarrays
Very little, the subarray of dcs frequency range high efficient radiation in its working frequency range 1710-1880mhz, in the outer i.e. wcdma frequency range of band
(1920-2170mhz) suppression radiation；Meanwhile, the subarray of wcdma frequency range efficient spoke in its working frequency range 1920-2170mhz
Penetrate, in band outer i.e. dcs frequency range (1710-1880mhz) suppression radiation.Therefore, the radiation between two subarrays does not interfere with each other, from
And reduce and interfere, reach higher interport isolation.
As shown in fig. 6-7, it is the no additional losser circuit being operated in dcs frequency range that one embodiment of the utility model provides
The reflectance factor s11- frequency of filter antenna unit and the simulation result figure of gain curve-frequency.It can be seen that working frequency range
For there being three modes of resonance in 1710-1880mhz, in s11- frequency curve, s11 is less than -10db in dcs frequency range.Increasing
In beneficial curve, the gain at two radiation zero, all below -22dbi, has the band-pass filtering property of good rectangular degree simultaneously,
Passband edges are precipitous, and substantially, frequency selectivity is good, and carries interior flat gain, in 1.8ghz close to 9dbi for sideband suppression.
As Figure 8-9, it is the no additional loss electricity being operated in wcdma frequency range that one embodiment of the utility model provides
The reflectance factor s11- frequency of the filter antenna unit on road and the simulation result figure of gain curve-frequency.It can be seen that work frequency
Section has three modes of resonance in 1920-2170mhz, and in s11- frequency curve, s11 is less than -10db in dcs frequency range.?
In gain curve, all below -20dbi, the bandpass filtering with good rectangular degree is special for the gain at two radiation zero
Property, passband edges are precipitous, and substantially, frequency selectivity is good for sideband suppression, and carry interior flat gain, close in 2.0ghz
9dbi.
As shown in figs. 10-11, be the subarray being operated in dcs frequency range that one embodiment of the utility model provides reflection
Coefficient s11- frequency and the simulation result figure of gain curve-frequency.It can be seen that working frequency range is to have three in 1710-1880mhz
Individual mode of resonance, in s11- frequency curve, s11 is less than -10db in dcs frequency range.In gain curve, gain has well
The band-pass filtering property of rectangular degree, passband edges are precipitous, and substantially, frequency selectivity is good for sideband suppression, and carries interior gain to put down
Smooth, in 1.8ghz close to 14.6dbi.
As illustrated by figs. 12-13, it is the anti-of the subarray being operated in wcdma frequency range that one embodiment of the utility model provides
Penetrate the simulation result figure of coefficient s11- frequency and gain curve-frequency.It can be seen that working frequency range is to have in 1920-2170mhz
Three modes of resonance, in s11- frequency curve, s11 is less than -10db in wcdma frequency range.In gain curve, gain has
The band-pass filtering property of good rectangular degree, passband edges are precipitous, and substantially, frequency selectivity is good, and carries interior increasing for sideband suppression
Benefit is flat, in 2.06ghz close to 15dbi.
As shown in figure 14, it is two submatrixs of compact dual-frequency base station antenna array that one embodiment of the utility model provides
The isolation curve s12- frequency analogous diagram of row port.It can be seen that in whole frequency range 1.5ghz-2.5ghz, the port of this array
Isolating coefficient s12 is less than 35db, the very little that intercouples between the subarray of this aerial array is described, interport isolation is very high.
Figure 15-18 sets forth the main polarization and cross-polarized of h- face at 1.8ghz and 2.06ghz for this aerial array and e face
Antenna pattern, equally illustrates that this aerial array has stable antenna pattern.
The utility model embodiment has the advantage that
1st, integrating filtering characteristic and radiation characteristic, aerial array itself has filtering performance, and passband edge is precipitous, and sideband suppresses
Substantially, there is good frequency selective characteristic, need not additional duplexer or uncoupling lattice network, overcome using additional duplex
Device or uncoupling network easily cause the big and bulky shortcoming of loss；
2nd, this aerial array is applied to the close dcs frequency range of frequency interval and wcdma frequency range, without uncoupling circuit
In the case of it is achieved that the high-isolation of port, frequency interference is faced in suppression, improves the performance of base station transceiver；
3rd, it is arranged parallel to each other between subarray, and certain spacing that staggers in vertical direction, thus further
Reduce intercoupling between subarray；
4th, total is mainly made up of metal patch, metallization via, dielectric-slab through hole and u-shaped groove, and structure is simple, if
Meter is easy, can be using cheap pcb technology processing.
The embodiment that the utility model provides is applied to wireless mobile communication base station field, can be applicable to all kinds of radio communications
In the reception of system and transmitting equipment, due to filtering characteristic of the present utility model, it is particularly well-suited in open complicated multiband
In multimode communication scene, it is operated in the antenna for base station of 4g-lte d frequency range (2.3-2.7ghz), and large-scale WLAN
wlan 2.4ghz ap.Benefit from the integrated of filtering characteristic and radiation characteristic, the utility model is also applied for wireless mobile simultaneously
The integration of communication system equipment and integrated, reduction design requirement, improve the ability of communication equipment anti-adjacent frequency interference.
A kind of above disclosed only preferred embodiment of the utility model, can not limit this practicality with this certainly
New interest field, one of ordinary skill in the art will appreciate that realizing all or part of flow process of above-described embodiment, and according to
The equivalent variations that the utility model claim is made, still fall within the scope that utility model is covered.
Claims (10)
1. a kind of compact multifrequency base-station antenna array it is characterised in that include is arranged at the first subarray on substrate and the
Two subarrays, described first subarray works in the first frequency range, and described second subarray works in different from described first frequency range
The second frequency range, described first subarray comprises the first filter antenna unit of at least one no additional losser circuit, described
Two subarrays comprise the second filter antenna unit of at least one no additional losser circuit.
2. compact multifrequency base-station antenna array as claimed in claim 1 is it is characterised in that described first filter antenna unit
Identical with the structure of described second filter antenna unit, all include medium substrate, lower medium substrate, be arranged at described upper medium
The parasitic radiation metal patch of upper surface of base plate, be arranged at described lower medium substrate upper surface primary radiation metal patch and
It is arranged at the metal floor of described lower medium substrate lower surface, be provided with the geometric center position of described primary radiation metal patch
The asymmetrical e font line of rabbet joint, is connected with short circuit metal probe between described primary radiation metal patch and described metal floor.
3. compact multifrequency base-station antenna array as claimed in claim 2 is it is characterised in that described asymmetrical e font groove
The middle line of rabbet joint of line is the shortest, and the line of rabbet joint positioned at described middle line of rabbet joint side is longer than the line of rabbet joint of opposite side.
4. compact multifrequency base-station antenna array as claimed in claim 1 is it is characterised in that described first subarray and described
Second subarray is parallel to be staggered.
5. compact multifrequency base-station antenna array as claimed in claim 1 is it is characterised in that phase in described first subarray
Between the first adjacent filter antenna unit the spacing distance second filter antenna unit adjacent with described second subarray it
Between spacing distance equal.
6. compact multifrequency base-station antenna array as claimed in claim 2 is it is characterised in that described first filter antenna unit
Also include plastic support post with described second filter antenna unit, described upper medium substrate and described lower medium substrate are by described
Plastic support post is fixedly connected.
7. compact multifrequency base-station antenna array as claimed in claim 2 is it is characterised in that also set on described lower medium substrate
There is the feed port through described metal floor.
8. compact multifrequency base-station antenna array as claimed in claim 1 is it is characterised in that described first subarray comprises 6
First filter antenna unit of individual no additional losser circuit, described second subarray comprises the second of 6 no additional losser circuits
Filter antenna unit.
9. compact multifrequency base-station antenna array as claimed in claim 1 is it is characterised in that described first frequency range is dcs frequency
Section, described second frequency range is wcdma frequency range.
10. compact multifrequency base-station antenna array as claimed in claim 1 is it is characterised in that described substrate both sides are provided with
Metal baffle.
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| CN106099352A (en) * | 2016-07-29 | 2016-11-09 | 华南理工大学 | A kind of compact multifrequency base-station antenna array |
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| CN106099352A (en) * | 2016-07-29 | 2016-11-09 | 华南理工大学 | A kind of compact multifrequency base-station antenna array |
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