CN105356071B - A kind of multiport frequency dividing electrical tilt antenna - Google Patents
A kind of multiport frequency dividing electrical tilt antenna Download PDFInfo
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- CN105356071B CN105356071B CN201510704551.0A CN201510704551A CN105356071B CN 105356071 B CN105356071 B CN 105356071B CN 201510704551 A CN201510704551 A CN 201510704551A CN 105356071 B CN105356071 B CN 105356071B
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- phase shifter
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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
-
- 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
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a kind of multiports to divide electrical tilt antenna, including reflecting plate and feeding network module, the feeding network module includes phase shifter module, is connect with phase shifter module frequency divider array, the power splitter being connect with phase shifter module, the back side of the reflecting plate is connect with frequency divider array, and the front of the reflecting plate is equipped with the wideband dipole array of doublet unit composition by non-conductive mode；The antenna coordinates the design of frequency divider array by phase shifter module, power splitter, the signal of antenna wideband radiator is divided into the two-way even independent subsignal of multichannel, form the antenna of two secondary or even more secondary different frequency ranges, in the case where not increasing antenna volume, it has been equivalent to common antenna much more at least, on the premise of ensuring performance, the space resources of base station is greatly saved in the antenna volume for reducing nearly half.
Description
Technical field
The present invention relates to the technical field of wireless telecommunications system, especially a kind of frequency dividing electrical tilt antennas for multiport.
Background technology
Mobile communication technology is developing rapidly, and forth generation mobile communication already takes up leading position, but traditional at present
Two generations and 3G (Third Generation) Moblie will also and be deposited within the regular hour, which results in demand of the operator to antenna to
Multisystem multiport direction is developed, meanwhile, site resource is nervous, and the miniaturization of antenna requires also to become more strong.Have
Designer devises a kind of antenna system, referring in particular to Patent No. 201310165973.6《A kind of pole broadband multichannel it
Bias placement frequency division antenna system》, mentioned in the middle by dividing subreflector Reflex low frequency signal, by the low-frequency signal by the image
Electric wave transmitting-receiving mechanism is received, and high-frequency signals penetrate the frequency dividing subreflector, and by the transmitting-receiving of main electric wave, mechanism is received, to meet frequency
Width requires.But in practice, it has been found that this antenna takes up space excessive, installation requirement is too high, affects practical application.
The rapid development of present mobile communication, it is desirable that in fixed-bandwidth by data and voice data increasingly increase,
The signal that can have many different frequencies in same transmission medium, since transmission medium all has certain nonlinear characteristic,
The signal of these different frequencies, which mixes, generates a kind of spurious signal --- passive intermodulation (Passive Inter-
Modulation, PIM).Passive intermodulation distortion refers in the signal Mixed design to passive device of two or more different frequencies,
The different intermodulation product of amplitude is generated in other frequencies, wherein PIM distortions are main and current density has relationship, therefore for possible
Current density should be reduced as far as possible by generating the source of PIM, and then ensure PIM stability, mutual between reduction base station system signal
Mutually interfere.The oscillator of antenna for base station is fixed on reflecting plate by metallic screw, this fixed form for oscillator and
Contact resistance between reflecting plate is very sensitive, and contact resistance can change according to the loosening of metallic screw, lead
It causes PIM unstable, and antenna for base station works in open air, due to the humidity of air, oxygen can be generated between oscillator and reflecting plate
Compound causes PIM to be deteriorated.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of multiport frequency dividing electrical tilt antenna.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of multiport divides electrical tilt antenna, including reflecting plate and feeding network module, the feeding network module include
There is phase shifter module, the frequency divider array that is connect with phase shifter module, the power splitter being connect with phase shifter module, the reflecting plate
The back side connect with frequency divider array, the reflecting plate front by non-conductive mode be equipped with doublet unit composition width
Frequency dipole array, wherein the center frequency wavelength of the doublet unit is λ.
As a preference, the doublet unit includes that the mutually orthogonal oscillator arms of two row, a pair are separately connected
Insulation folder there are two the feed tab of radiation arm and for fixing feed tab.
As a preference, the doublet unit includes end short dipole unit and terminal open circuit dipole
Unit.
As a preference, the doublet unit includes being located at each two ends short dipole list in left and right both ends
Member and eight terminal open circuit doublet units positioned at middle are divided between left and right each five doublet units in both ends
The spacing of 0.85~0.9 λ, remaining doublet unit are 0.76~0.8 λ.
As a preference, the frequency divider array includes the frequency divider group on micro belt board and micro belt board
Part, the doublet unit and the RF signal input end of frequency dividing device assembly connect one to one.
As a preference, the phase shifter module includes the first phase shifter package and the second phase shifter package, institute
State the first radiofrequency signal output that RF signal input end, corresponding first radiofrequency signal outlet line are connected in frequency dividing device assembly
End, the second RF signal output for corresponding to the second radiofrequency signal outlet line, the first radio frequency letter divided in device assembly
Correspondence is connect with the first phase shifter package, the second phase shifter package respectively for number output end, the second RF signal output, and described the
One phase shifter package be also connected in turn connect with the first radiofrequency signal outlet line the first radiofrequency signal output power splitter, in
Between frequency divider, external power splitter, the second radiofrequency signal outlet line pass through the second radiofrequency signal export power splitter and second
Phase shifter package, intermediate division device connect, and external doublet unit is connected on the external power splitter.
As a preference, the front of the reflecting plate is provided with the drive mechanism being connect with phase shifter module.
As a preference, decoupling is provided at central symmetry position on the reflecting plate between each doublet unit
Isolation board is provided with spacer on the decoupling isolation board, and the upper end of the decoupling isolation board is zigzag.
As a preference, the both sides of the doublet unit are provided with side partition board, wherein the side partition board and dipole
The distance at subelement center is 0.22~0.25 λ, and the side divider height is 0.16~0.20 λ, and the side partition board is inclined outwardly
And 110~120 ° of angle is formed between reflecting plate.
As a preference, there is plastic spacer between the doublet unit and reflecting plate.
The beneficial effects of the invention are as follows：The antenna is by rational structure design, especially by phase shifter module, power splitter
The signal of antenna wideband radiator is divided into the two-way even independent subsignal of multichannel, composition by the design for coordinating frequency divider array
The antenna of two secondary or even more secondary different frequency ranges has been equivalent to common antenna at least more in the case where not increasing antenna volume,
Under the premise of ensureing performance, the antenna volume of nearly half is reduced, the space resources of base station is greatly saved, and passes through reflecting plate
Non-conductive contact between radiating element, reduces the current density of radiation source contact surface, reduces the electricity of the sources of generation PIM
Current density is greatly improved for the stability of PIM.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the connection diagram of the present invention；
Fig. 2 is the front plan view of the present invention；
Fig. 3 is the 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.
Specific implementation mode
Referring to Fig.1, Fig. 2, Fig. 3, a kind of multiport frequency dividing electrical tilt antenna, including reflecting plate 1 and feeding network module, it is described
Feeding network module includes phase shifter module 2, is connect with phase shifter module 2 frequency divider array 3 connects with phase shifter module 2
The back side of the power splitter 4 connect, the reflecting plate 1 is connect with frequency divider array 3, and the front of the reflecting plate 1 passes through non-conductive side
Formula is equipped with the wideband dipole array 6 of the composition of doublet unit 5, wherein the center frequency wavelength of the doublet unit 5 is
λ, wherein power splitter 4 are 5 distribution power of doublet unit, and phase shifter module 2 can be that doublet unit 5 distributes phase, specifically may be used
It is made of several slow wave phase shifters, slow wave phase shifter appearance is in sector structure, can be superimposed as two groups two-by-two, two groups of phase shifters interlock
It places, one group of sector center of circle is on a left side, and one group of sector center of circle is on the right side；One group of control low-frequency range, one group of control high band.Phase shifter can
Go out ten formula phase shifters for one, is used for multiple radiation cell arrays.Reflecting plate 1 can be made of main body and side, and side is outside
Tilt, between gradient is 98~108 °, the inner width of main body for 0.88~0.93 λ between, the height of side for 0.17~0.21 λ it
Between.It is 0.22~0.25 λ, height at a distance from doublet unit center that, which there are side partition board, side partition board in individual 5 both sides of doublet unit,
For 0.16~0.20 λ, side partition board is inclined outwardly, and the angle with reflection plate body is 110~120 °.3 groups of ingredients of frequency divider array
Frequency module, frequency divider array 3 can be such that the input signal of doublet unit 5 works on two different frequency sub-band, to allow day
Line works on two independent frequency sub-band.There are many frequency divider uniform arrays to arrange on frequency divider array 3, there are one frequency dividers
Radiofrequency signal entrance and several radiofrequency signals export, and signal enters radiofrequency signal entrance from doublet unit 5, is divided into multichannel not
Signal with frequency range exports output from multiple radiofrequency signals, then accesses respective phase shifter network.Above-mentioned design passes through phase shifter
Module 2 coordinates power splitter 4 that the signal of antenna wideband radiator is divided into the independent subsignal of two-way, the secondary different frequency range of composition two
Antenna is realized in the case where not increasing antenna volume, has been equivalent to more common antenna, and the space that base station is greatly saved provides
Source.Doublet unit 5 is installed in the front of the reflecting plate 1 by non-conductive mode, and the electric current that can reduce radiation source contact surface is close
Degree, improves the stability of PIM.
With reference to Fig. 4, the doublet unit 5 includes that the mutually orthogonal oscillator arms 51 of two row, a pair are connected separately with two
The feed tab 53 of a radiation arm 52 and insulation folder 54 for fixing feed tab 53, this structure are conducive to improve dipole list
The standing wave bandwidth of member 5 and gain, it is small to ensure that the main lobe beamwidth of antenna fluctuates in broadband range.
The front of the reflecting plate 1 is provided with the drive mechanism 7 being connect with phase shifter module 2, and drive mechanism 7 passes through plastics
Part and reflection back phase shifter are hinged, to control the rotation of phase shifter, achieve the purpose that control phase, general drive mechanism
There are two groups, the first from left right side is distributed in reflecting plate both ends, controls two groups of phases of antenna respectively.
As other embodiment, referring to Fig.1, Fig. 2, Fig. 3, a kind of multiport divides electrical tilt antenna, including reflecting plate 1
With feeding network module, the feeding network module includes phase shifter module 2, the frequency divider battle array being connect with phase shifter module 2
Row 3, the power splitter 4 being connect with phase shifter module 2, the back side of the reflecting plate 1 are connect with frequency divider array 3, the reflecting plate 1
Front by non-conductive mode be equipped with doublet unit 5 composition wideband dipole array 6, wherein the doublet unit
5 center frequency wavelength is λ, and the doublet unit 5 includes end short dipole unit 55 and terminal open circuit dipole
Unit 56, two kinds of mutual cooperations of doublet unit 5 are conducive to improve cross polarization, and make radiating element in ultra wide band range
Lobe broadband convergence is good.The frequency divider array 3 includes the frequency dividing device assembly 31 on micro belt board and micro belt board, is made
Conductivity higher, the stability of antenna are more preferable.The doublet unit 5 and the RF signal input end of frequency dividing device assembly 31 are one by one
It is correspondingly connected with.The phase shifter module 2 includes the first phase shifter package 21 and the second phase shifter package 22, the frequency divider group
The first RF signal output, right of RF signal input end, corresponding first radiofrequency signal outlet line 61 is connected on part 31
Answer the second RF signal output of the second radiofrequency signal outlet line 62, the first radiofrequency signal in the frequency dividing device assembly 31
Correspondence is connect with the first phase shifter package 21, the second phase shifter package 22 respectively for output end, the second RF signal output, described
First phase shifter package 21 is also connected with the first radiofrequency signal output work being connect with the first radiofrequency signal outlet line 61 in turn
Divide device 41, intermediate division device 33, external power splitter 42, wherein external power splitter 42 is using bisection power splitter.Described second penetrates
Frequency signal output line road 62 exports power splitter 43 by the second radiofrequency signal and the second phase shifter package 22, intermediate division device 33 connect
It connects, external doublet unit 57 is connected on the external power splitter 42.First radiofrequency signal output power splitter 41 and second is penetrated
Frequency signal exports not decile power splitter of the power splitter 43 using 1/4 λ short circuit minor matters of band.First phase shifter package 21 and the second phase shift
Device assembly 22 has enough access ports to ensure to correspond with doublet unit 5.Phase shifter is the phase shifter with power distribution,
Power between adjacent two-stage access interface generally differs 3dB or so, guarantees as each doublet unit distribution power one by one
And phase.The copper-clad steel cable of the silver-plated Ф 1.5mm of core wire can be used in the cable of access phase shifter, can be with the cable of Ф 1.5mm
The space of optimization arrangement cable.
± 45 ° of dual-polarization cells can be used in specific doublet unit 5, and by taking+45 ° of polarization as an example, signal is short from an end
Road doublet unit 55 or terminal open circuit doublet unit 56 enter the RF signal input end of frequency divider array 3, then pass through
Filtering forms the independent signal of two-way, is then exported respectively from the output end of frequency divider array 3, then believes from corresponding first radio frequency
The second radiofrequency signal output of first RF signal output of number outlet line 61, corresponding second radiofrequency signal outlet line 62
End two signal outlets output, output a set of frequencies is 1710~2170MHz, is polarized as+45 ° of signal, and a set of frequencies is
2490~2690MHz polarizes as+45 ° of signal；One group of signal enters 21 corresponding access port of the first phase shifter package, one group
Signal enters 22 corresponding access port of the second phase shifter package；Similarly -45 ° of polarization, also export two groups of signals, one group for 1710~
2170MHz polarizes as -45 ° of signal, and one group is 2490~2690MHz, polarizes as -45 ° of signal.Among aerial array
There is no directly and the corresponding access port of phase shifter, the signal of external doublet unit 57 pass through external for external doublet unit 57
Power splitter 42 synthesizes, and enters back into intermediate division device 33 and is divided into the independent signal of two-way, and it is defeated to enter the first radiofrequency signal for signal all the way
Go out power splitter 41, another way enters the second radiofrequency signal and exports power splitter 43, finally respectively from the first radiofrequency signal outlet line
61 and second radiofrequency signal outlet line 62 export.In this way, the signal of ± 45 ° of polarized 1710~2170MHz of a pair is by certain
Width be combined to, form complete aerial radiation signal, be also formed a secondary independent antenna, a pair of ± 45 ° are polarized
The signal of 2490~2690MHz is formed another complete aerial radiation signal, that is, forms another independent antenna of pair.
As other embodiment, referring to Fig.1, Fig. 2, Fig. 3, a kind of multiport divides electrical tilt antenna, including reflecting plate 1
With feeding network module, the feeding network module includes phase shifter module 2, the frequency divider battle array being connect with phase shifter module 2
Row 3, the power splitter 4 being connect with phase shifter module 2, the back side of the reflecting plate 1 are connect with frequency divider array 3, the reflecting plate 1
Front by non-conductive mode be equipped with doublet unit 5 composition wideband dipole array 6, wherein the doublet unit
5 center frequency wavelength is λ, and the doublet unit 5 includes end short dipole unit 55 and terminal open circuit dipole
Unit 56, the doublet unit 5 include positioned at each two ends short dipole unit 55 in left and right both ends and being located at middle
Eight terminal open circuit doublet units 56, be divided into 0.85~0.9 λ between left and right each five doublet units 5 in both ends,
The spacing of remaining doublet unit 5 is 0.76~0.8 λ, and the appropriate spacing adjusted between doublet unit is conducive to improve
Upper Sidelobe Suppression and null-fill.Such as the working frequency of end short dipole unit 55 and terminal open circuit doublet unit 56
For 1710~2690MHz, doublet unit 5 is arranged on the central longitudinal axis of reflecting plate 1, spacing be not equidistantly, tail portion and
The spacing of five doublet units 5 in front end is 0.85~0.9 λ or so, and remaining element spacing is 0.8 λ；Two of tail portion and front end
Doublet unit 5 is end short dipole unit 55, remaining is terminal open circuit doublet unit 56.
As other embodiment, referring to Fig.1, Fig. 2, Fig. 3, a kind of multiport divides electrical tilt antenna, including reflecting plate 1
With feeding network module, the feeding network module includes phase shifter module 2, the frequency divider battle array being connect with phase shifter module 2
Row 3, the power splitter 4 being connect with phase shifter module 2, the back side of the reflecting plate 1 are connect with frequency divider array 3, the reflecting plate 1
Front by non-conductive mode be equipped with doublet unit 5 composition wideband dipole array 6, wherein the doublet unit
5 center frequency wavelength is λ.Be provided at central symmetry position between each doublet unit 5 on the reflecting plate 1 decoupling every
From plate 8, change the isolation of antenna by improving the degree of coupling between doublet unit.It is arranged on the decoupling isolation board 8
There is spacer 81, wherein decoupling isolation board 8 can be evenly distributed in every centre symmetry line of doublet unit 5 two-by-two, it is described to go
The upper end of coupling isolation board 8 is zigzag, can optimize the front and back ratio of cross polarization of antenna.
As other embodiment, referring to Fig.1, Fig. 2, Fig. 3, a kind of multiport divides electrical tilt antenna, including reflecting plate 1
With feeding network module, the feeding network module includes phase shifter module 2, the frequency divider battle array being connect with phase shifter module 2
Row 3, the power splitter 4 being connect with phase shifter module 2, the back side of the reflecting plate 1 are connect with frequency divider array 3, the reflecting plate 1
Front by non-conductive mode be equipped with doublet unit 5 composition wideband dipole array 6, wherein the doublet unit
5 center frequency wavelength is λ, and the both sides of the doublet unit 5 are provided with side partition board 9, wherein the side partition board 9 and dipole
The distance at 5 center of unit is 0.22~0.25 λ, and 9 height of side partition board is 0.16~0.20 λ, and the side partition board 9 is inclined outwardly
And 110~120 ° of angle is formed between reflecting plate 1, partition board 9 main function in side is to optimize H face lobe widths and its convergence
Property.
As other embodiment, referring to Fig.1, Fig. 2, Fig. 3, a kind of multiport divides electrical tilt antenna, including reflecting plate 1
With feeding network module, the feeding network module includes phase shifter module 2, the frequency divider battle array being connect with phase shifter module 2
Row 3, the power splitter 4 being connect with phase shifter module 2, the back side of the reflecting plate 1 are connect with frequency divider array 3, the reflecting plate 1
Front by non-conductive mode be equipped with doublet unit 5 composition wideband dipole array 6, wherein the doublet unit
5 center frequency wavelength is λ.With reference to Fig. 5, there are plastic spacer 11, wherein dipole between the doublet unit 5 and reflecting plate 1
Subelement 5, reflecting plate 1, plastic spacer 11 can be connected by screw, and be set with plastic rubber ring on screw again, ensure doublet unit 5
Junction is non-conductive between reflecting plate 1, to reduce the current density of PIM occurring sources, and then achievees the purpose that improve PIM.
According to above-mentioned principle, the present invention can also carry out change and modification appropriate to the above embodiment.Therefore, this hair
It is bright to be not limited to specific implementation mode disclosed and described above, some modifications and changes of the present invention should also be as to fall into this
In the scope of the claims of invention.
Claims (7)
1. a kind of multiport divides electrical tilt antenna, including reflecting plate (1) and feeding network module, it is characterised in that：The feed
Network module includes phase shifter module (2), the frequency divider array (3) and phase shifter module that are connect with phase shifter module (2)
(2) power splitter (4) connected, the back side of the reflecting plate (1) are connect with frequency divider array (3), the front of the reflecting plate (1)
The wideband dipole array (6) of doublet unit (5) composition is installed by non-conductive mode, wherein the doublet unit
(5) center frequency wavelength is λ, and the doublet unit (5) includes end short dipole unit (55) and terminal open circuit
Doublet unit (56), the frequency divider array (3) include the frequency dividing device assembly (31) on micro belt board and micro belt board,
The doublet unit (5) and the RF signal input end of frequency dividing device assembly (31) connect one to one, the phase shifter module
(2) include the first phase shifter package (21) and the second phase shifter package (22), be connected with and penetrate on the frequency dividing device assembly (31)
Frequency signal input part, the first RF signal output of corresponding first radiofrequency signal outlet line (61), corresponding second radio frequency letter
Second RF signal output of number outlet line (62), the first RF signal output on the frequency dividing device assembly (31),
Correspondence is connect second RF signal output with the first phase shifter package (21), the second phase shifter package (22) respectively, and described the
One phase shifter package (21) is also connected with the first radiofrequency signal output being connect with the first radiofrequency signal outlet line (61) in turn
Power splitter (41), intermediate division device (33), external power splitter (42), the second radiofrequency signal outlet line (62) pass through second
Radiofrequency signal output power splitter (43) is connect with the second phase shifter package (22), intermediate division device (33), the external power splitter
(42) external doublet unit (57) is connected on.
2. a kind of multiport according to claim 1 divides electrical tilt antenna, it is characterised in that：The doublet unit (5)
Include that the mutually orthogonal oscillator arms of two row (51), a pair are separately connected the feed tab (53) there are two radiation arm (52) and are used for
The insulation folder (54) of fixed feed tab (53).
3. a kind of multiport according to claim 1 divides electrical tilt antenna, it is characterised in that：The doublet unit (5)
Including being located at each two ends short dipole unit (55) in left and right both ends and positioned at eight terminal open circuit dipoles of middle
Unit (56) is divided into 0.85~0.9 λ between left and right each five doublet units (5) in both ends, remaining described dipole list
The spacing of first (5) is 0.76~0.8 λ.
4. a kind of multiport according to claim 1 divides electrical tilt antenna, it is characterised in that：The reflecting plate (1) is just
Face is provided with the drive mechanism (7) being connect with phase shifter module (2).
5. a kind of multiport according to claim 1 divides electrical tilt antenna, it is characterised in that：It is each on the reflecting plate (1)
Decoupling isolation board (8) is provided between a doublet unit (5) at central symmetry position, is arranged on the decoupling isolation board (8)
There is spacer (81), the upper end of the decoupling isolation board (8) is zigzag.
6. a kind of multiport according to claim 1 divides electrical tilt antenna, it is characterised in that：The doublet unit (5)
Both sides be provided with side partition board (9), wherein the side partition board (9) at a distance from doublet unit (5) center be 0.22~0.25
λ, the side partition board (9) are highly 0.16~0.20 λ, and the side partition board (9) is inclined outwardly and forms folder between reflecting plate (1)
110~120 ° of angle.
7. a kind of multiport according to claim 1 divides electrical tilt antenna, it is characterised in that：The doublet unit (5)
There is plastic spacer (11) between reflecting plate (1).
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| CN201510704551.0A CN105356071B (en) | 2015-10-27 | 2015-10-27 | A kind of multiport frequency dividing electrical tilt antenna |
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| CN107547118B (en) * | 2016-06-29 | 2020-07-31 | 上海朗帛通信技术有限公司 | Method and device in wireless communication |
| EP3930099B1 (en) | 2016-09-19 | 2023-08-30 | Huawei Technologies Co., Ltd. | Two-dimensional antenna and network device |
| CN107947755B (en) * | 2016-10-11 | 2021-06-29 | 康普技术有限责任公司 | Energy absorption circuit |
| 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 |
| CN109687146A (en) * | 2019-01-15 | 2019-04-26 | 摩比科技（深圳）有限公司 | The angle of declination regulating device and electrical tilt antenna of electrical tilt antenna |
| CN113109692B (en) * | 2021-03-31 | 2023-03-24 | 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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| CN2505992Y (en) * | 2001-07-27 | 2002-08-14 | 台湾骏炎科技股份有限公司 | Bipolar gap dipole array antenna |
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