CN110112583A - Multifrequency broad beam antenna device - Google Patents
Multifrequency broad beam antenna device Download PDFInfo
- Publication number
- CN110112583A CN110112583A CN201910469677.2A CN201910469677A CN110112583A CN 110112583 A CN110112583 A CN 110112583A CN 201910469677 A CN201910469677 A CN 201910469677A CN 110112583 A CN110112583 A CN 110112583A
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- Prior art keywords
- antenna
- paster
- paster antenna
- multifrequency
- shell
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention discloses a kind of multifrequency broad beam antenna device, the multifrequency broad beam antenna device includes shell, multiple paster antennas with different frequency range are provided in the shell, RF transceiver corresponding with each paster antenna and for the feeding network of transmitting radio frequency signal between the paster antenna and the RF transceiver, multiple paster antennas arranged stacked in the shell, the side of the paster antenna is arranged in the RF transceiver, the multifrequency broad beam antenna device further includes the mounting base for being used to support the paster antenna, the accommodating cavity for arranging the feeding network is provided in the mounting base.The small volume of multifrequency broad beam antenna device proposed by the invention and compact-sized.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of multifrequency broad beam antenna device.
Background technique
Fore device of the antenna as communication system, in different application fields, to its polarization mode, gain and directional diagram
Suffer from specific requirement.Wherein, circular polarized antenna can receive the electromagnetic wave of any polarization mode, and radiated electromagnetic wave can also be by
Any poliarizing antenna receives, which may also suppress depolarisation effect and multipath because of caused by the natural phenomenas such as misty rain
Reflection；Meanwhile circular polarized antenna can also improve the anti-polarization mismatch ability of communication link, therefore, circular polarized antenna is extensive
It applies in satellite communication and field of satellite navigation.
It is well known that communication linkage can be established with artificial satellite under any attitude to meet the communication equipment on ground,
Often require that the antenna of communication equipment has very big beam angle, or the gain in some biggish beam angle is greater than
Some critical value.When single-frequency or narrow frequency work, the antenna of broad beam is easier to realize, and in multifrequency or wideband,
It needs that very large space is arranged to antenna, can guarantee the communication performance of antenna.
Based on above content it is found that being the communication performance for guaranteeing antenna, the volume of existing multifrequency broad beam antenna complete machine
It is very big, it can not meet miniaturization and compact-sized requirement.
Summary of the invention
It is a primary object of the present invention to propose a kind of multifrequency broad beam antenna device, to solve existing multifrequency broad beam
There are the biggish technical problems of volume for antenna complete machine.
In order to solve the above technical problems, the present invention proposes a kind of miniaturization and compact-sized multifrequency broad beam antenna dress
Set, which includes shell, be provided in the shell multiple paster antennas with different frequency range, with
It the corresponding RF transceiver of each paster antenna and is penetrated for transmission between the paster antenna and the RF transceiver
The feeding network of frequency signal, multiple paster antennas arranged stacked in the shell, the RF transceiver are arranged in institute
The side of paster antenna is stated, the multifrequency broad beam antenna device further includes the mounting base for being used to support the paster antenna, institute
State the accommodating cavity being provided in mounting base for arranging the feeding network.
It preferably, include the first patch set gradually from the bottom to top in the multiple paster antenna with different frequency range
The working frequency range of antenna, the second paster antenna, third paster antenna and the 4th paster antenna, first paster antenna is
300MHz~400MHz, the working frequency range of second paster antenna are 1980MHz~2200MHz, the third paster antenna
Working frequency range be 1551MHz~1571MHz, the working frequency range of the 4th paster antenna is 1250MHz~1280MHz.
Preferably, the mounting base includes being used to support the first mounting base of first paster antenna and being used to support institute
The second mounting base of the second paster antenna, third paster antenna and the 4th paster antenna is stated, the section of first mounting base is T
Shape structure, the section of second mounting base are symmetrical hierarchic structure.
Preferably, each paster antenna in the multiple paster antenna with different frequency range include medium substrate,
The radiation patch of the upper surface of the medium substrate is set and the couple feed probe that is arranged in the radiation patch with
Earthing rod；Alternatively, each paster antenna in the multiple paster antenna with different frequency range include radiation patch and
Couple feed probe and earthing rod in the radiation patch are set, supported between each radiation patch by dielectric posts.
Preferably, the paster antenna is arranged in disc-shaped, and close to the bottom of the shell in multiple paster antennas
The paster antenna in portion includes the cylinder that multilayer is used to control beam angle and circular in cross-section, toward the side of the paster antenna
To in cylinder described in multilayer, posterior cross section is less than preceding cross section.
Preferably, the paster antenna in multiple paster antennas close to the bottom of the shell includes from the bottom to top successively
The first cylinder, the second cylinder and the third cylinder being arranged, first cylinder and third cylinder are cylindrical structure, second column
Body is frustum cone structure.
Preferably, the RF transceiver includes RF receiving circuit and radio frequency transmitter circuitry, the RF receiving circuit
Including low-frequency noise amplifier and low-converter, the radio frequency transmitter circuitry includes upconverter and power amplifier.
Preferably, the shell includes pedestal and the separator that is arranged in the pedestal, and the separator is at the bottom
The first installing zone for arranging the paster antenna and the second installation for arranging the RF transceiver are limited in seat
Area, the shell further include the antenna house to match with first installing zone and the lid to match with second installing zone
Plate.
Preferably, the separator includes base portion and upwardly extends and protrude from the side of the base portion and limited by the pedestal
The lattice of fixed accommodating space, the inner space of the lattice are the first installing zone for arranging the paster antenna,
The outer space of the lattice is the second installing zone for arranging the RF transceiver.
Preferably, the shell is arranged in a rectangular parallelepiped shape, and the length of the shell is less than 400mm, the width of the shell
Less than 400mm, the height of the shell is less than 40mm.
The beneficial effect of the embodiment of the present invention is: multiple paster antennas, by mounting base arranged stacked, are used in shell
In the accommodated inside chamber that the feeding network of transmitting radio frequency signal is then arranged in mounting base, to save space；Meanwhile utilizing patch
The space layout of antenna side RF transceiver corresponding with paster antenna, so that the whole knot of multifrequency broad beam antenna device
Structure is more compact.Multifrequency broad beam antenna device of the present invention makes multifrequency antenna under the precondition for meeting broad beam, so that
Its overall volume is relatively small and each structure between arrangement it is more compact.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of multifrequency broad beam antenna device of the present invention；
Fig. 2 is the structure chart of multifrequency broad beam antenna device shown in FIG. 1 unassembled antenna house and cover board；
Fig. 3 is the top view of multifrequency broad beam antenna device shown in FIG. 1；
Fig. 4 is the face the A-A cross-sectional view of multifrequency broad beam antenna device shown in Fig. 3；
Fig. 5 is the structure chart of the paster antenna of multifrequency broad beam antenna device of the present invention；
Fig. 6 is the side view of paster antenna shown in fig. 5；
Fig. 7 is the emulation schematic diagram of the radiation direction of multifrequency broad beam antenna device of the present invention；
Fig. 8 be invention multifrequency broad beam antenna device axis suppose to emulation schematic diagram.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention, based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
In order to solve the above technical problems, the present invention proposes a kind of multifrequency broad beam antenna device, referring to Fig. 1 to Fig. 4, this is more
Bandwidth beam antenna device includes shell 1, and multiple paster antennas 2 with different frequency range and each patch day are provided in shell 1
The corresponding RF transceiver of line 2 and feeding network for transmitting radio frequency signal between paster antenna and RF transceiver are more
The side of paster antenna 2 is arranged in a arranged stacked in shell of paster antenna 2, RF transceiver, and proposed by the invention is more
Bandwidth beam antenna device further includes the mounting base 3 for being used to support paster antenna 2, is provided in mounting base 3 for arranging feed
The accommodating cavity of network.
It is understood that shell 1 is internally provided with for arranging paster antenna 2, RF transceiver and feeding network
And the accommodating space of mounting base 3, wherein shell 1 is made of metal material, such as copper, aluminium or steel etc., to avoid in shell 1
Interference of the device by external electromagnetic field.Specifically, when the electromagnetic wave outside shell 1 reaches the surface of shell 1, due to sky
Gas-metal impedance discontinuity interface can make part electromagnetic wave generate reflection on the surface of shell 1；Later, not by shell
The electromagnetic wave of 1 surface reflection and the inner wall into shell 1, will decay in the inner wall of shell 1；Then, unbated electricity
Magnetic wave, due to the interface of metal-air impedance discontinuity, can make the electromagnetic waveforms at again when entering the inside of shell 1
Secondary reflection, and entered in shell 1 again, to play the role of electromagnetic shielding.
Further, paster antenna 2 includes rectangular patch antenna, square patch antenna and circular patch antenna etc., including
But not limited to this, those skilled in the art can select according to the actual situation.
Further, multifrequency broad beam antenna device proposed by the invention can be fed by radio-frequency transmission line, is coaxial
Line feed or electromagnetic coupling feed etc., including but not limited to this, those skilled in the art can be configured according to the actual situation.
In embodiments of the present invention, the working frequency range of multiple paster antennas 2 is different, to be respectively used to receive and emit
The radiofrequency signal of different frequency range.It is understood that the paster antenna 2 of the bottom in multiple paster antennas 2 close to shell 1 is also used
Make the reflecting plate of upper layer paster antenna 2, therefore, by changing the shape and size of the paster antenna 2, can adjust upper layer patch day
The radiance of line 2.
Multiple paster antennas in technical solution of the present invention, by 3 arranged stacked of mounting base, are used for transmission and penetrate in shell 1
The feeding network of frequency signal is then arranged in the accommodated inside chamber of mounting base, to save space；Meanwhile it utilizing paster antenna 2 weeks
The space layout of side RF transceiver corresponding with paster antenna 2 so that the overall structure of multifrequency broad beam antenna device compared with
It is compact.Multifrequency broad beam antenna device of the present invention makes multifrequency antenna under the precondition for meeting broad beam, so that its is whole
Body volume is relatively small and each structure between arrangement it is more compact.
In an embodiment of the present invention, paster antenna 2 includes the first paster antenna 21, second set gradually from the bottom to top
Paster antenna 22, third paster antenna 23 and the 4th paster antenna 24, the working frequency range of the first paster antenna 21 be 300MHz~
The working frequency range of 400MHz, the second paster antenna 22 are 1980MHz~2200MHz, and the working frequency range of third paster antenna 23 is
1551MHz~1571MHz, the working frequency range of the 4th paster antenna 24 are 1250MHz~1280MHz.
It should be noted that above-mentioned the first paster antenna 21 referred to, the second paster antenna 22,23 and of third paster antenna
4th paster antenna 24 is satellite communication antena, is mainly used for satellite communication and satellite navigation combined system, through the invention
The multifrequency broad beam antenna device proposed, may make satellite communication antena under the premise of meeting broad beam, the body of complete machine
Product greatly reduces.
Referring to fig. 4, the mounting base 3 that technical solution of the present invention is proposed includes being used to support the first of the first paster antenna 21
Mounting base 31 and the second mounting base for being used to support the second paster antenna 22, third paster antenna 23 and the 4th paster antenna 24
32, wherein the section of the first mounting base 31 is T-shaped structure, and the section of the second mounting base 32 is symmetrical hierarchic structure.It can
With understanding, it is provided with the first accommodating cavity for arranging feeding network in the first mounting base 31, is set in the second mounting base 32
It is equipped with the second accommodating cavity for arranging feeding network, the first paster antenna 21, the second paster antenna 22, third paster antenna 23
And the 4th the feeding network of paster antenna 24 cabling is carried out by the first accommodating cavity and the second accommodating cavity, making full use of space
Meanwhile the overall weight of multifrequency broad beam antenna device proposed by the invention also accordingly reduces.
In embodiments of the present invention, each paster antenna 2 in multiple paster antennas 2 with different frequency range includes being situated between
Matter substrate, be arranged in medium substrate upper surface radiation patch and the couple feed probe that is arranged in radiation patch with connect
Ground column；Alternatively, each paster antenna 2 in multiple paster antennas 2 with different frequency range includes radiation patch and setting
Couple feed probe and earthing rod in radiation patch pass through dielectric posts between each radiation patch and support.
In the above-described embodiments, paster antenna 2 is generally covered on by medium substrate, the radiation patch on medium substrate
The metal ground three parts of medium substrate bottom surface are constituted.Wherein, medium substrate is arranged in radiation patch and metal ground (phase
When in reflecting plate, the energy that can be radiated to radiation patch is reflected and converged) between, it is mainly used for reducing radiation patch
Resonance frequency.For the overall volume for further decreasing multifrequency broad beam antenna device, can by any in multiple paster antennas or
The medium substrate removal of whole paster antennas carries out local support to radiation patch by dielectric posts or metal column.In this hair
In bright specific embodiment, the paster antenna 2 in multiple paster antennas 2 close to the bottom of shell 1 exists including medium substrate, setting
The radiation patch of the upper surface of medium substrate, the couple feed probe being arranged in radiation patch and earthing rod.
Referring to Fig. 5, in an embodiment of the present invention, paster antenna 2 is arranged in disc-shaped, and leans in multiple paster antennas 2
The paster antenna 2 of the bottom of nearly shell 1 includes the cylinder 211 that multilayer is used to control beam angle and circular in cross-section, toward patch
The direction of chip antenna 2, in multilayer cylinder 211, posterior cross section is less than preceding cross section.It is understood that electric current
Distribution form has determined the shape of radiation pattern, and the multilayer cylinder 211 of paster antenna 2 proposed by the invention is controllable
The spatial distribution form of the electric current of metal surface processed, to achieve the purpose that the beam angle for controlling electromagnetic wave.The present invention is mentioned
The multilayer cylinder 211 of paster antenna 2 out may make upper layer paster antenna 2 to deviate the passive spoke in 70 ° of directions in terrace normal direction
Gain is penetrated greater than -10dB, Circular polarization ratio is less than 6dB.It should be noted that terrace normal direction is specifically referred to relative to antenna surface
Vertical direction.Specifically, in the specific embodiment of the invention, close to the paster antenna of the bottom of shell 1 in multiple paster antennas 2
2 include the first cylinder 211a, the second cylinder 211b and third cylinder 211c set gradually from the bottom to top, wherein the first cylinder
The diameter of the bottom surface and top surface of 211a and third cylinder 211c is equal, as cylindrical structure, and the second cylinder 211b is rotary table knot
Structure.Those skilled in the art according to the present invention documented by technical solution, can cylinder 211 to paster antenna 2 particular number
It is selected with shape, to meet antenna for the different demands of radiance.
It is understood that RF transceiver proposed by the invention includes RF receiving circuit and radio frequency transmitter circuitry,
RF receiving circuit includes low-frequency noise amplifier and low-converter, and radio frequency transmitter circuitry includes upconverter and power amplification
Device.
In conjunction with above content, the working principle of multifrequency broad beam antenna device proposed by the invention is done described below:
The paster antenna 2 of each working frequency range receives the electromagnetic wave of the corresponding frequency band in space, and is translated into electric signal, then pass through
By the electric signal transmission to receiving channel, receiving channel passes feeding network after the processing such as filtering, low noise amplification, down coversion
Pass demodulator demodulation；The modulators modulate signal of each working frequency range is simultaneously sent to transmission channel, and transmission channel passes through up-conversion,
After the processing such as power amplification, filtering, the paster antenna 2 of corresponding frequency band is transferred to by feeding network, paster antenna 2 will receive
Electric signal be converted into electromagnetic wave and be radiated space.
Referring to Fig. 1 and Fig. 2, the shell 1 that technical solution of the present invention is proposed includes pedestal 11 and is arranged in pedestal 11
Separator 12, separator 12 limit the first installing zone 4 for arranging paster antenna 2 in pedestal 11 and for arranging radio frequency
Second installing zone 5 of transceiver, shell 1 further include the antenna house 13 to match with the first installing zone 4 and with 5 phase of the second installing zone
Matched cover board 14.In embodiments of the present invention, it is the EMC Requirements for meeting paster antenna 2, passes through separator 12 first
The first installing zone 4 and the second installing zone 5 are limited in pedestal 11, secondly, being provided on the first installing zone 4 matched
Antenna house 13, and matched cover board 14 is provided on the second installing zone 5, antenna house 13 and the first installing zone 4 are formed and are used
In the first enclosure space of arrangement paster antenna 2, and cover board 14 is then formed with the second installing zone 5 for arranging RF transceiver
Second enclosure space, so that it is completely isolated between paster antenna 2 and RF transceiver, it avoids generating electromagnetic interference.
In the above-described embodiments, separator 12 specifically includes base portion 121 and upwardly extends and protrude from the side of base portion 121
By the lattice 122 for the accommodating space that pedestal 11 limits, the inner space of lattice 122 is for arranging paster antenna 2
One installing zone 4, the outer space of lattice 122 are the second installing zone 5 for arranging RF transceiver.In the embodiment of the present invention
In, separator 12 is specifically configured to inner hollow and cylindrical structure open at one end, and the bottom of cylindrical structure corresponds to above-mentioned mention
And base portion 121, and the curved side portions of cylindrical structure then correspond to the above-mentioned lattice 122 referred to.Preferably, in separator 12
A certain size gap is provided between pedestal 11, which can be used as the cabling cloth of feeding network proposed by the invention
It sets, further to save space.
Above-described is only part or preferred embodiment of the invention, therefore either text or attached drawing cannot all limit
The scope of protection of the invention processed utilizes description of the invention and accompanying drawing content under all designs with an entirety of the invention
Made equivalent structure transformation, or direct/indirect other related technical areas that are used in are included in the model that the present invention protects
In enclosing.
Claims (10)
1. a kind of multifrequency broad beam antenna device, which is characterized in that including shell, be provided in the shell multiple with difference
The paster antenna of frequency range, RF transceiver corresponding with each paster antenna and for the paster antenna and the radio frequency
The feeding network of transmitting radio frequency signal between transceiver, multiple paster antennas arranged stacked in the shell are described to penetrate
The side of the paster antenna is arranged in frequency transceiver, and the multifrequency broad beam antenna device further includes being used to support the patch
The mounting base of antenna is provided with the accommodating cavity for arranging the feeding network in the mounting base.
2. multifrequency broad beam antenna device according to claim 1, which is characterized in that the multiple with different frequency range
It include the first paster antenna, the second paster antenna, the third paster antenna and the 4th set gradually from the bottom to top in paster antenna
Paster antenna, the working frequency range of first paster antenna are 300MHz~400MHz, the work frequency of second paster antenna
Section is 1980MHz~2200MHz, and the working frequency range of the third paster antenna is 1551MHz~1571MHz, the 4th patch
The working frequency range of chip antenna is 1250MHz~1280MHz.
3. multifrequency broad beam antenna device according to claim 2, which is characterized in that the mounting base includes being used to support
First mounting base of first paster antenna and it is used to support second paster antenna, third paster antenna and the 4th patch
Second mounting base of antenna, the section of first mounting base are T-shaped structure, and the section of second mounting base is bilateral symmetry
Hierarchic structure.
4. multifrequency broad beam antenna device according to claim 1, which is characterized in that the multiple with different frequency range
Each paster antenna in paster antenna include medium substrate, be arranged in the medium substrate upper surface radiation patch with
And couple feed probe and earthing rod in the radiation patch are set；Alternatively, the multiple patch with different frequency range
Each paster antenna in antenna includes radiation patch and the couple feed probe being arranged in the radiation patch and connect
Ground column passes through dielectric posts between each radiation patch and supports.
5. multifrequency broad beam antenna device according to claim 1, which is characterized in that the paster antenna is set in disc-shaped
Set, and the paster antenna in multiple paster antennas close to the bottom of the shell include multilayer for control beam angle and
The cylinder of circular in cross-section, toward the direction of the paster antenna, in cylinder described in multilayer, posterior cross section is less than preceding
Cross section.
6. multifrequency broad beam antenna device according to claim 5, which is characterized in that close in multiple paster antennas
The paster antenna of the bottom of the shell includes the first cylinder, the second cylinder and third cylinder set gradually from the bottom to top, institute
It states the first cylinder and third cylinder is cylindrical structure, second cylinder is frustum cone structure.
7. multifrequency broad beam antenna device according to claim 1, which is characterized in that the RF transceiver includes radio frequency
It receives circuit and radio frequency transmitter circuitry, the RF receiving circuit includes low-frequency noise amplifier and low-converter, the radio frequency
Transmit circuit includes upconverter and power amplifier.
8. multifrequency broad beam antenna device according to claim 1, which is characterized in that the shell includes pedestal and setting
Separator in the pedestal, the separator limit the first peace for arranging the paster antenna in the pedestal
It fills area and the second installing zone for arranging the RF transceiver, the shell further includes matching with first installing zone
Antenna house and the cover board that matches with second installing zone.
9. multifrequency broad beam antenna device according to claim 8, which is characterized in that the separator include base portion and from
The side of the base portion upwardly extends and protrudes the lattice of the accommodating space limited by the pedestal, the inside of the lattice
Space is the first installing zone for arranging the paster antenna, and the outer space of the lattice is for arranging the radio frequency
Second installing zone of transceiver.
10. multifrequency broad beam antenna device according to claim 1, which is characterized in that the shell is set in a rectangular parallelepiped shape
It sets, the length of the shell is less than 400mm, and the width of the shell is less than 400mm, and the height of the shell is less than 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910469677.2A CN110112583B (en) | 2019-05-31 | 2019-05-31 | Multi-frequency wide-beam antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910469677.2A CN110112583B (en) | 2019-05-31 | 2019-05-31 | Multi-frequency wide-beam antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110112583A true CN110112583A (en) | 2019-08-09 |
| CN110112583B CN110112583B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910469677.2A Active CN110112583B (en) | 2019-05-31 | 2019-05-31 | Multi-frequency wide-beam antenna device |
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| Publication number | Publication date |
|---|---|
| CN110112583B (en) | 2020-10-09 |
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