CN105356071A - Multi-port frequency-division tunable antenna - Google Patents
Multi-port frequency-division tunable antenna Download PDFInfo
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- CN105356071A CN105356071A CN201510704551.0A CN201510704551A CN105356071A CN 105356071 A CN105356071 A CN 105356071A CN 201510704551 A CN201510704551 A CN 201510704551A CN 105356071 A CN105356071 A CN 105356071A
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- phase shifter
- frequency
- doublet unit
- doublet
- frequency divider
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
Abstract
The invention discloses a multi-port frequency-division tunable antenna which comprises a reflection plate and a feed network module, wherein the feed network module comprises a phase shifter module, a frequency divider array and a power divider, the frequency divider array is connected with the phase shifter module, the power divider is connected with the phase shifter module, the back side of the reflection plate is connected with the frequency divider array, the front side of the reflection plate is provided with a wideband dipole array through a non-conductive mode, and the wideband dipole array comprises dipole units. In the antenna, through the design of the phase shifter module and the power divider matched with the frequency divider array, a signal of a wideband radiator or the antenna is divided into two paths or even multiple paths of independent sub signals so as to form two pairs or even multiple pairs of antennas with different frequency bands; on the condition of no increase of the antenna volume, at least one pair of antenna is equivalently added; and on the premise of ensuring performance, approximate half of the antenna volume is reduced, and space resources of a base station are greatly saved.
Description
Technical field
The present invention relates to the technical field of wireless telecommunications system, particularly a kind of frequency division electrical tilt antenna for multiport.
Background technology
Mobile communication technology is in develop rapidly, current forth generation mobile communication has occupied leading position, but traditional second generation and 3G (Third Generation) Moblie are also incited somebody to action and are deposited within the regular hour, which results in operator to the demand of antenna to multisystem multiport future development, simultaneously, site resource is nervous, and the miniaturization of antenna requires also to become stronger.A designer devises a kind of antenna system, the concrete reference patent No. is " the bias placement frequency division antenna system of a kind of pole broadband multichannel " of 201310165973.6, in the middle of mention by frequency division subreflector Reflex low frequency signal, this low-frequency signal is received and dispatched mechanism by this reflection electric wave received, high-frequency signals penetrates this frequency division subreflector, receive and dispatch mechanism by main electric wave received, to meet bandwidth requirements.But find in practice, this antenna takes up space excessive, and installation requirement is high too, have impact on practical application.
The develop rapidly of present mobile communication, the data that requirement is passed through in fixed-bandwidth and speech data increase day by day, the signal of a lot of different frequency can be there is in same transmission medium, because transmission medium all has certain nonlinear characteristic, the signal of these different frequencies mixes and produces a kind of spurious signal---passive intermodulation (PassiveInter-Modulation, PIM).Passive intermodulation distortion refers to that the signal Mixed design of two or more different frequencies is in passive device, the different intermodulation product of amplitude is produced in other frequency, wherein the main and current density of PIM distortion has relation, therefore current density should be reduced as far as possible for the source that may produce PIM, and then ensure PIM stability, reduce interfering with each other between base station system signal.The oscillator of antenna for base station is fixed on reflecting plate by metallic screw, this fixed form is highstrung for the contact resistance between oscillator and reflecting plate, and contact resistance can change according to loosening of metallic screw, cause PIM unstable, and antenna for base station works in open air, due to the humidity of air, oxide can be produced between oscillator and reflecting plate, cause PIM to be deteriorated.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of multiport frequency division electrical tilt antenna.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of multiport frequency division electrical tilt antenna, comprise reflecting plate and feeding network module, described feeding network module includes phase shifter module, the frequency divider array be connected with phase shifter module, the power splitter that is connected with phase shifter module, the back side of described reflecting plate is connected with frequency divider array, the front of described reflecting plate is provided with the wideband dipole array of doublet unit composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit is λ.
As a preference, described doublet unit includes the mutually orthogonal oscillator arms of two row, is connected to the feed tab of two radiation arms and the insulation folder for fixing feed tab for a pair.
As a preference, described doublet unit includes end short dipole unit and terminal open circuit doublet unit.
As a preference, described doublet unit comprises eight the terminal open circuit doublet units being positioned at each two the end short dipole unit in left and right two ends He being positioned at middle, each five doublet units in described left and right two ends be spaced apart 0.85 ~ 0.9 λ, the spacing of doublet unit described in all the other is 0.76 ~ 0.8 λ.
As a preference, described frequency divider array comprises the frequency divider assembly on micro belt board and micro belt board, and the radio-frequency (RF) signal input end of described doublet unit and frequency divider assembly connects one to one.
As a preference, described phase shifter module includes the first phase shifter package and the second phase shifter package, described frequency divider assembly is connected with radio-frequency (RF) signal input end, first RF signal output of corresponding first radiofrequency signal outlet line, second RF signal output of corresponding second radiofrequency signal outlet line, the first RF signal output on described frequency divider assembly, second RF signal output is corresponding and the first phase shifter package respectively, second phase shifter package connects, described first phase shifter package is also connected with the first radiofrequency signal be connected with the first radiofrequency signal outlet line in turn and exports power splitter, intermediate division device, external power splitter, described second radiofrequency signal outlet line exports power splitter and the second phase shifter package by the second radiofrequency signal, intermediate division device connects, described external power splitter is connected with external doublet unit.
As a preference, the front of described reflecting plate is provided with the drive mechanism be connected with phase shifter module.
As a preference, on described reflecting plate, between each doublet unit, Central Symmetry position is provided with decoupling division board, and described decoupling division board is provided with spacer, and the upper end of described decoupling division board is zigzag.
As a preference, the both sides of described doublet unit are provided with side dividing plate, the distance at wherein said side dividing plate and doublet unit center is 0.22 ~ 0.25 λ, described side divider height is 0.16 ~ 0.20 λ, and described side dividing plate is outward-dipping and and form angle 110 ~ 120 ° between reflecting plate.
As a preference, between described doublet unit and reflecting plate, there is plastic spacer.
The invention has the beneficial effects as follows: this antenna is by rational structural design, especially by phase shifter module, power splitter coordinates the design of frequency divider array, the signal of antenna wideband radiator is divided into two-way even multichannel independently subsignal, form the antenna of the even how secondary different frequency range of two pairs, when not increasing antenna volume, be equivalent to much more at least common antenna, under the prerequisite of guaranteed performance, reduce the antenna volume of nearly half, greatly save the space resources of base station, and by the non-conductive contact between reflecting plate and radiating element, decrease the current density of radiation source contact-making surface, reduce the current density of PIM source of generation, stability for PIM is greatly improved.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is connection diagram of the present invention;
Fig. 2 is front plan view of the present invention;
Fig. 3 is stereogram of the present invention;
Fig. 4 is the stereogram of doublet unit in the present invention.
Fig. 5 is the assembling schematic diagram of doublet unit part in the present invention.
Embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, a kind of multiport frequency division electrical tilt antenna, comprise reflecting plate 1 and feeding network module, described feeding network module includes phase shifter module 2, the frequency divider array 3 be connected with phase shifter module 2, the power splitter 4 be connected with phase shifter module 2, the back side of described reflecting plate 1 is connected with frequency divider array 3, the front of described reflecting plate 1 is provided with the wideband dipole array 6 of doublet unit 5 composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit 5 is λ, wherein power splitter 4 distributes power for doublet unit 5, phase shifter module 2 can be doublet unit 5 and distributes phase place, specifically can be made up of some slow wave phase shifters, slow wave phase shifter outward appearance is sector structure, two groups can be superimposed as between two, two groups of phase shifters are staggeredly placed, one group of fan-shaped center of circle is on a left side, one group of fan-shaped center of circle is on the right side, one group controls low-frequency range, and one group controls high band.Phase shifter can be one and goes out ten formula phase shifters, can for multiple radiation cell array.Reflecting plate 1 can be made up of main body and side, and side is outward-dipping, and gradient is between 98 ~ 108 °, and the inner width of main body is between 0.88 ~ 0.93 λ, and the height of side is between 0.17 ~ 0.21 λ.There is side dividing plate indivedual doublet unit 5 both sides, and the distance at side dividing plate and doublet unit center is 0.22 ~ 0.25 λ, and be highly 0.16 ~ 0.20 λ, side dividing plate is outward-dipping, is 110 ~ 120 ° with the angle of reflecting plate main body.Frequency divider array 3 forms frequency division module, and frequency divider array 3 can make the input signal of doublet unit 5 work on two different frequency sub-band, thus allows Antenna Operation on two independently frequency sub-band.Frequency divider array 3 there is a lot of frequency divider uniform array arrange, frequency divider has a radiofrequency signal entrance and the outlet of several radiofrequency signals, signal enters radiofrequency signal entrance from doublet unit 5, the signal being divided into multichannel different frequency range exports from multiple radiofrequency signal outlet, then accesses respective phase shifter network.Above-mentioned design coordinates power splitter 4 that the signal of antenna wideband radiator is divided into two-way independently subsignal by phase shifter module 2, form the antenna of two secondary different frequency ranges, realizing when not increasing antenna volume, being equivalent to common antenna many, greatly save the space resources of base station.Doublet unit 5 is installed by non-conductive mode in the front of described reflecting plate 1, can reduce the current density of radiation source contact-making surface, improves the stability of PIM.
With reference to Fig. 4, described doublet unit 5 includes the mutually orthogonal oscillator arms of two row 51, is connected to the feed tab 53 of two radiation arms 52 and the insulation folder 54 for fixing feed tab 53 for a pair, this structure is conducive to the standing wave bandwidth sum gain improving doublet unit 5, ensures that the main lobe beamwidth of antenna fluctuates little in broadband range.
The front of described reflecting plate 1 is provided with the drive mechanism 7 be connected with phase shifter module 2, drive mechanism 7 by working of plastics and reflecting plate back side phase shifter hinged, thus control the rotation of phase shifter, reach the object of control phase, general drive mechanism has two groups, one the first from left right side is distributed in reflecting plate two ends, respectively two groups of phase places of control antenna.
As other execution mode, with reference to Fig. 1, Fig. 2, Fig. 3, a kind of multiport frequency division electrical tilt antenna, comprise reflecting plate 1 and feeding network module, described feeding network module includes phase shifter module 2, the frequency divider array 3 be connected with phase shifter module 2, the power splitter 4 be connected with phase shifter module 2, the back side of described reflecting plate 1 is connected with frequency divider array 3, the front of described reflecting plate 1 is provided with the wideband dipole array 6 of doublet unit 5 composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit 5 is λ, described doublet unit 5 includes end short dipole unit 55 and terminal open circuit doublet unit 56, two kinds of doublet units 5 cooperatively interact and are conducive to improving cross polarization, and make the lobe broadband convergence of radiating element in ultra wide band range good.Described frequency divider array 3 comprises the frequency divider assembly 31 on micro belt board and micro belt board, makes that the conductance of antenna is higher, stability is better.Described doublet unit 5 connects one to one with the radio-frequency (RF) signal input end of frequency divider assembly 31.Described phase shifter module 2 includes the first phase shifter package 21 and the second phase shifter package 22, described frequency divider assembly 31 is connected with radio-frequency (RF) signal input end, first RF signal output of corresponding first radiofrequency signal outlet line 61, second RF signal output of corresponding second radiofrequency signal outlet line 62, the first RF signal output on described frequency divider assembly 31, second RF signal output is corresponding and the first phase shifter package 21 respectively, second phase shifter package 22 connects, described first phase shifter package 21 is also connected with the first radiofrequency signal be connected with the first radiofrequency signal outlet line 61 in turn and exports power splitter 41, intermediate division device 33, external power splitter 42, wherein external power splitter 42 adopts bisection power splitter.Described second radiofrequency signal outlet line 62 exports power splitter 43 by the second radiofrequency signal and is connected with the second phase shifter package 22, intermediate division device 33, and described external power splitter 42 is connected with external doublet unit 57.First radiofrequency signal exports power splitter 41 and the second radiofrequency signal exports the not decile power splitter that power splitter 43 adopts band 1/4 λ short circuit minor matters.First phase shifter package 21 and the second phase shifter package 22 all have enough access ports to ensure and doublet unit 5 one_to_one corresponding.Phase shifter is the phase shifter of band power division, and the power between adjacent two-stage access interface generally differs about 3dB, guarantees as each doublet unit distributes power and phase place one by one.The cable of access phase shifter can adopt the copper-clad steel cable of the silver-plated Ф 1.5mm of heart yearn, can optimize the space of arrangement cable with the cable of Ф 1.5mm.
Concrete doublet unit 5 can adopt ± 45 ° of dual-polarization cells, example is polarized to+45 °, signal enters the radio-frequency (RF) signal input end of frequency divider array 3 from an end short dipole unit 55 or terminal open circuit doublet unit 56, then filtering is passed through, form two-way independently signal, then export from the output of frequency divider array 3 respectively, again from the first RF signal output of corresponding first radiofrequency signal outlet line 61, the second RF signal output two signal outlets of corresponding second radiofrequency signal outlet line 62 export, exporting a class frequency is 1710 ~ 2170MHz, be polarized to the signal of+45 °, one class frequency is 2490 ~ 2690MHz, be polarized to the signal of+45 °, one group of signal enters the access port of the first phase shifter package 21 correspondence, and one group of signal enters the access port of the second phase shifter package 22 correspondence, in like manner-45 ° of polarization, also export two groups of signals, and one group is 1710 ~ 2170MHz, is polarized to the signal of-45 °, and one group is 2490 ~ 2690MHz, is polarized to the signal of-45 °.The access port that external doublet unit 57 in the middle of aerial array is not direct and phase shifter is corresponding, the signal of external doublet unit 57 is synthesized by external power splitter 42, enter intermediate division device 33 again and be divided into two-way independently signal, one road signal enters the first radiofrequency signal and exports power splitter 41, another road enters the second radiofrequency signal and exports power splitter 43, finally exports from the first radiofrequency signal outlet line 61 and the second radiofrequency signal outlet line 62 respectively.Like this, the signal of 1710 ~ 2170MHz of a pair ± 45 ° polarization is combined to by certain width, form complete aerial radiation signal, also a pair independently antenna is just defined, the signal of 2490 ~ 2690MHz of a pair ± 45 ° polarization just defines another complete aerial radiation signal, namely defines another pair independently antenna.
As other execution mode, with reference to Fig. 1, Fig. 2, Fig. 3, a kind of multiport frequency division electrical tilt antenna, comprise reflecting plate 1 and feeding network module, described feeding network module includes phase shifter module 2, the frequency divider array 3 be connected with phase shifter module 2, the power splitter 4 be connected with phase shifter module 2, the back side of described reflecting plate 1 is connected with frequency divider array 3, the front of described reflecting plate 1 is provided with the wideband dipole array 6 of doublet unit 5 composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit 5 is λ, described doublet unit 5 includes end short dipole unit 55 and terminal open circuit doublet unit 56, described doublet unit 5 comprises and is positioned at a left side, each two the end short dipole unit 55 in right two ends and eight the terminal open circuit doublet units 56 being positioned at middle, a described left side, each five doublet units 5 in right two ends be spaced apart 0.85 ~ 0.9 λ, described in all the other, the spacing of doublet unit 5 is 0.76 ~ 0.8 λ, spacing between suitable adjustment doublet unit, be conducive to improving upper Sidelobe Suppression and null-fill.The operating frequency of such as end short dipole unit 55 and terminal open circuit doublet unit 56 is 1710 ~ 2690MHz, doublet unit 5 is arranged on the central longitudinal axis of reflecting plate 1, spacing is unequal-interval, the spacing of afterbody and front end five doublet units 5 is about 0.85 ~ 0.9 λ, and remaining element spacing is 0.8 λ; Two doublet units 5 of afterbody and front end are end short dipole unit 55, and remaining is terminal open circuit doublet unit 56.
As other execution mode, with reference to Fig. 1, Fig. 2, Fig. 3, a kind of multiport frequency division electrical tilt antenna, comprise reflecting plate 1 and feeding network module, described feeding network module includes phase shifter module 2, the frequency divider array 3 be connected with phase shifter module 2, the power splitter 4 that is connected with phase shifter module 2, the back side of described reflecting plate 1 is connected with frequency divider array 3, the front of described reflecting plate 1 is provided with the wideband dipole array 6 of doublet unit 5 composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit 5 is λ.On described reflecting plate 1, between each doublet unit 5, Central Symmetry position is provided with decoupling division board 8, is changed the isolation of antenna by the degree of coupling improved between doublet unit.Described decoupling division board 8 is provided with spacer 81, and wherein decoupling division board 8 can be evenly distributed in the centre symmetry line of every doublet unit 5 between two, and the upper end of described decoupling division board 8 is zigzag, compares before and after the cross polarization can optimizing antenna.
As other execution mode, with reference to Fig. 1, Fig. 2, Fig. 3, a kind of multiport frequency division electrical tilt antenna, comprise reflecting plate 1 and feeding network module, described feeding network module includes phase shifter module 2, the frequency divider array 3 be connected with phase shifter module 2, the power splitter 4 be connected with phase shifter module 2, the back side of described reflecting plate 1 is connected with frequency divider array 3, the front of described reflecting plate 1 is provided with the wideband dipole array 6 of doublet unit 5 composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit 5 is λ, the both sides of described doublet unit 5 are provided with side dividing plate 9, wherein said side dividing plate 9 is 0.22 ~ 0.25 λ with the distance at doublet unit 5 center, described side dividing plate 9 is highly 0.16 ~ 0.20 λ, described side dividing plate 9 outward-dipping and and form angle 110 ~ 120 ° between reflecting plate 1, side dividing plate 9 Main Function is to optimize H face lobe width and convergence thereof.
As other execution mode, with reference to Fig. 1, Fig. 2, Fig. 3, a kind of multiport frequency division electrical tilt antenna, comprise reflecting plate 1 and feeding network module, described feeding network module includes phase shifter module 2, the frequency divider array 3 be connected with phase shifter module 2, the power splitter 4 that is connected with phase shifter module 2, the back side of described reflecting plate 1 is connected with frequency divider array 3, the front of described reflecting plate 1 is provided with the wideband dipole array 6 of doublet unit 5 composition by non-conductive mode, the center frequency wavelength of wherein said doublet unit 5 is λ.With reference to Fig. 5, plastic spacer 11 is had between described doublet unit 5 and reflecting plate 1, wherein doublet unit 5, reflecting plate 1, plastic spacer 11 connect by screw, screw is set with plastic rubber ring again, ensure that between doublet unit 5 and reflecting plate 1, junction is non-conductive, to reduce the current density of PIM occurring source, and then reach the object improving PIM.
According to above-mentioned principle, the present invention can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.
Claims (10)
1. a multiport frequency division electrical tilt antenna, comprise reflecting plate (1) and feeding network module, it is characterized in that: described feeding network module includes phase shifter module (2), the frequency divider array (3) be connected with phase shifter module (2), the power splitter (4) be connected with phase shifter module (2), the back side of described reflecting plate (1) is connected with frequency divider array (3), the front of described reflecting plate (1) is provided with by non-conductive mode the wideband dipole array (6) that doublet unit (5) forms, the center frequency wavelength of wherein said doublet unit (5) is λ.
2. a kind of multiport frequency division electrical tilt antenna according to claim 1, is characterized in that: described doublet unit (5) includes the mutually orthogonal oscillator arms of two row (51), is connected to the feed tab (53) of two radiation arms (52) and the insulation folder (54) for fixing feed tab (53) for a pair.
3. a kind of multiport frequency division electrical tilt antenna according to claim 1, is characterized in that: described doublet unit (5) includes end short dipole unit (55) and terminal open circuit doublet unit (56).
4. a kind of multiport frequency division electrical tilt antenna according to claim 3, it is characterized in that: described doublet unit (5) comprises eight the terminal open circuit doublet units (56) being positioned at each two the end short dipole unit (55) in left and right two ends and being positioned at middle, each five doublet units (5) in described left and right two ends be spaced apart 0.85 ~ 0.9 λ, the spacing of doublet unit described in all the other (5) is 0.76 ~ 0.8 λ.
5. a kind of multiport frequency division electrical tilt antenna according to claim 3, it is characterized in that: described frequency divider array (3) comprises the frequency divider assembly (31) on micro belt board and micro belt board, described doublet unit (5) connects one to one with the radio-frequency (RF) signal input end of frequency divider assembly (31).
6. a kind of multiport frequency division electrical tilt antenna according to claim 5, it is characterized in that: described phase shifter module (2) includes the first phase shifter package (21) and the second phase shifter package (22), described frequency divider assembly (31) is connected with radio-frequency (RF) signal input end, first RF signal output of corresponding first radiofrequency signal outlet line (61), second RF signal output of corresponding second radiofrequency signal outlet line (62), the first RF signal output on described frequency divider assembly (31), second RF signal output is corresponding and the first phase shifter package (21) respectively, second phase shifter package (22) connects, described first phase shifter package (21) is also connected with the first radiofrequency signal be connected with the first radiofrequency signal outlet line (61) in turn and exports power splitter (41), intermediate division device (33), external power splitter (42), described second radiofrequency signal outlet line (62) exports power splitter (43) and the second phase shifter package (22) by the second radiofrequency signal, intermediate division device (33) connects, described external power splitter (42) is connected with external doublet unit (57)
.
7. a kind of multiport frequency division electrical tilt antenna according to claim 5 or 6, is characterized in that: the front of described reflecting plate (1) is provided with the drive mechanism (7) be connected with phase shifter module (2).
8. a kind of multiport frequency division electrical tilt antenna according to claim 1, it is characterized in that: between upper each doublet unit (5) of described reflecting plate (1), Central Symmetry position is provided with decoupling division board (8), described decoupling division board (8) is provided with spacer (81), and the upper end of described decoupling division board (8) is zigzag.
9. a kind of multiport frequency division electrical tilt antenna according to claim 1, it is characterized in that: the both sides of described doublet unit (5) are provided with side dividing plate (9), wherein said side dividing plate (9) is 0.22 ~ 0.25 λ with the distance at doublet unit (5) center, described side dividing plate (9) is highly 0.16 ~ 0.20 λ, and described side dividing plate (9) is outward-dipping and and form angle 110 ~ 120 ° between reflecting plate (1).
10. a kind of multiport frequency division electrical tilt antenna according to claim 1, is characterized in that: have plastic spacer (11) between described doublet unit (5) and reflecting plate (1).
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| CN106532248A (en) * | 2016-12-09 | 2017-03-22 | 桂林电子科技大学 | Ultra-compacted microstrip patch array antenna |
| CN106532248B (en) * | 2016-12-09 | 2023-03-31 | 桂林电子科技大学 | Ultra-compact microstrip patch array antenna |
| CN107331954A (en) * | 2017-08-08 | 2017-11-07 | 深圳市信格微科技有限公司 | It is a kind of that there are many cable antennas of the multiband of power splitter and combiner |
| CN113109692A (en) * | 2021-03-31 | 2021-07-13 | 中国电子科技集团公司第十三研究所 | Microstrip circuit debugging method and adjusting module |
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