CN111509370B - Video wireless microwave transmission method and transmission device - Google Patents
Video wireless microwave transmission method and transmission device Download PDFInfo
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- CN111509370B CN111509370B CN202010449741.3A CN202010449741A CN111509370B CN 111509370 B CN111509370 B CN 111509370B CN 202010449741 A CN202010449741 A CN 202010449741A CN 111509370 B CN111509370 B CN 111509370B
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- wireless microwave
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005855 radiation Effects 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H01Q1/36—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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a video wireless microwave transmission method and a transmission device, wherein the video wireless microwave transmission method comprises a substrate and a dipole antenna fixedly arranged on the substrate, the dipole antenna consists of radiation patches arranged up and down, the radiation patches comprise transverse patches arranged at the top of the substrate and deformation patches arranged at the bottom of the transverse patches, the deformation patches are symmetrically arranged along the central line of the transverse patches, and the deformation patches at the two sides are connected to form a wire slot; the dipole antenna is arranged in 16 rows and 8 columns on the substrate, namely 128 dipole antennas in total, the array antenna is arranged, and the antenna has the transmission requirements of receiving and managing multiple information sources simultaneously, forming different beam directions and different numbers of multiple beams randomly in a full space domain, improves the self radiation efficiency of the antenna, has the characteristics of high gain and low side lobe, and reduces the power consumption.
Description
Technical Field
The invention relates to the technical field of microwave communication, in particular to a video wireless microwave transmission method and a video wireless microwave transmission device.
Background
The wireless microwave mobile video transmission system is composed of a mobile video transmitter, a receiver and a camera, and also comprises fixed or mobile relay broadcasting equipment such as a news live broadcast car or a relay station when encountering long-distance or non-visual distance image transmission, and is a highly integrated mobile non-visual distance digital image transmission equipment through advanced core technology COFDM (multi-carrier modulation technology) of mobile communication and digital image compression MPEG2 technology, and can transmit real-time stable audio and video in high-speed movement and under the condition of shielding urban buildings, the video transmission process is simply that the video and the audio shot by the camera are transmitted out in the form of microwaves through the transmitter, and the receiver is a mobile small television station through a player after receiving the video and the audio, but the microwave mobile video transmission system has the following defects:
1. Transmitting point-to-point:
the wireless microwave mobile video transmission system can only receive microwave signals in a specific frequency band in a limited range, and the transmitted wave beams are only one, so that the transmission requirement of multiple video signals cannot be met;
2. The transmission needs to use an omni-directional antenna:
traditional wireless microwave mobile video transmission system adopts rotary mechanism to carry out omnidirectional emission, and receives the influence of environment easily, can't guarantee microwave transmission's stability.
The invention aims to design a video wireless microwave transmission method and a video wireless microwave transmission device with multiple information sources and high interference resistance.
Disclosure of Invention
The invention aims to provide a video wireless microwave transmission method and a video wireless microwave transmission device, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The wireless microwave transmission device for the video comprises a substrate and a dipole antenna fixedly arranged on the substrate, wherein the dipole antenna consists of a radiation patch which is arranged up and down, the radiation patch comprises a transverse patch arranged at the top of the substrate and a deformation patch arranged at the bottom of the transverse patch, the deformation patches are symmetrically arranged along the central line of the transverse patch, and the deformation patches at the two sides are connected to form a wire slot;
the dipole antennas are arranged in 16 rows by 8 columns, i.e. 128 dipole antennas in total, on the substrate.
Preferably, the signal coverage area of the dipole antenna is in a space domain with the azimuth angle of 120 degrees and the pitch angle of-30 degrees to 15 degrees, and the working frequency band of the dipole antenna is 2.1-2.5GHz.
Preferably, the dipole antenna has a working distance of not less than 20km under a 5W viewing condition and not less than 5km under a 100mW viewing condition.
Preferably, the substrate is fixedly arranged in the antenna framework, the antenna framework is fixedly provided with an antenna housing, and one side, far away from the antenna housing, of the antenna framework is connected with a plurality of reflecting plates through bolts.
Preferably, a frequency source, an array power supply, a power divider and a cooling fan are further arranged in the antenna framework.
Preferably, the bottom of the antenna framework is fixedly provided with a base, the bottom of the base is provided with a pair of rotating brackets and adjusting brackets, the rotating brackets on two sides are movably arranged in the rotating support seat through rotating shafts, the adjusting brackets on two sides are fixedly arranged in the angle adjusting seat through pin shafts, and the rotating support seat and the angle adjusting seat are fixedly arranged on the mounting seat.
A video wireless microwave transmission method comprises the following steps:
Step one: starting up and selecting proper signal bandwidth and working frequency, performing synchronous beam electric scanning of 16 wave positions on an airspace with 120 degrees of orientation, 30 degrees to 15 degrees of pitch angle of the radome, and tracking and measuring related microwave signals;
Step two: during transmitting, the real-time signal processor generates an amplitude-phase control word of each antenna unit, controls each signal generator and generates radio frequency signals with certain frequency, phase and amplitude; outputting the signals to corresponding antenna units, and finally synthesizing a required emission pattern in space by the radiation signals of each dipole antenna;
Step three: when receiving, each T/R assembly receives the microwave signals of each unit of the antenna, forms intermediate frequency signals through down conversion, and outputs echo signals after intermediate frequency sampling processing; the method comprises the steps that a large amount of echo data output by a multipath digital T/R assembly are transmitted to a real-time signal processor through a high-speed data transmission system, and the real-time signal processor completes self-adaptive beam forming and software signal processing;
Step four: and demodulating the different digital beams through the server to finally form the video signal. Compared with the prior art, the invention has the beneficial effects that:
1. The invention adopts the arrangement of the array antenna, and has the transmission requirements of simultaneously carrying out receiving management on multiple information sources, arbitrarily forming different beam directions and different numbers of multiple beams in a full airspace;
2. The dipole antenna improves the self radiation efficiency of the antenna, has the characteristics of high gain and low side lobe, and reduces the power consumption.
The invention adopts the arrangement of the array antenna, has the transmission requirements of simultaneously carrying out receiving management on multiple information sources, randomly forming different beam directions and different numbers of multiple beams in a full airspace, improves the self radiation efficiency of the antenna, has the characteristics of high gain and low side lobe, and reduces the power consumption.
Drawings
Fig. 1 is a schematic diagram of an arrangement structure of a dipole antenna according to the present invention;
FIG. 2 is a schematic diagram of a radiation patch arrangement of the present invention;
FIG. 3 is a schematic view of a substrate mounting structure according to the present invention;
FIG. 4 is a schematic view of a base connection structure according to the present invention;
fig. 5 is a schematic diagram of a synchronous beam electric scanning structure of multiple wave positions according to the present invention.
In the figure: 1 base plate, 2 dipole antenna, 3 radiation patch, 4 horizontal patch, 5 deformation patch, 6 antenna skeleton, 7 radome, 8 reflecting plate, 9 base, 10 runing rest, 11 adjusting bracket, 12 rotating support seat, 13 angle adjusting seat, 14 mount pad.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the present invention provides a technical solution:
The wireless microwave transmission device of a video, including the base plate 1 and dipole antenna 2 fixedly set up on base plate 1, the dipole antenna 2 is made up of the radiation patch 3 set up from top to bottom, the radiation patch 3 includes the horizontal patch 4 set up in the top of the base plate and set up in the deformation patch 5 of the bottom of the horizontal patch 4, the deformation patch 5 is set up symmetrically along the central line of the horizontal patch 4, the deformation patch 5 of both sides connects and forms the wire casing;
the dipole antennas 2 are arranged in 16 rows by 8 columns, i.e. 128 total dipole antennas 2, on the substrate 1.
As a preferred mode, the signal coverage of the dipole antenna 2 is within the space of 120 degrees azimuth and-30 degrees-15 degrees pitch angle, and the working frequency band of the dipole antenna 2 is 2.1-2.5GHz.
As a preferable mode, the acting distance of the dipole antenna 2 is more than or equal to 20km under the condition of 5W and more than or equal to 5km under the condition of 100 mW.
As a preferred aspect, the substrate 1 is fixedly disposed in the antenna framework 6, the antenna framework 6 is further fixedly provided with an antenna housing 7, and one side of the antenna framework 6 far away from the antenna housing 7 is connected with a plurality of reflecting plates 8 through bolts.
As a preferable mode, a frequency source, an array power supply, a power divider and a radiator fan are also arranged in the antenna skeleton 6.
As a preferred option, the bottom of the antenna framework 6 is fixedly provided with a base 9, the bottom of the base 9 is provided with a pair of rotating brackets 10 and adjusting brackets 11, the rotating brackets 10 on two sides are movably arranged in a rotating support seat 12 through a rotating shaft, the adjusting brackets 11 on two sides are fixedly arranged in an angle adjusting seat 13 through a pin shaft, and the rotating support seat 12 and the angle adjusting seat 13 are fixedly arranged on a mounting seat 14.
A video wireless microwave transmission method comprises the following steps:
Step one: starting up and selecting proper signal bandwidth and working frequency, performing synchronous beam electric scanning of 16 wave positions on an airspace of which the antenna housing 7 faces 120 degrees in azimuth and pitch angles are-30 degrees to 15 degrees, and tracking and measuring related microwave signals;
Step two: during transmitting, the real-time signal processor generates an amplitude-phase control word of each antenna unit, controls each signal generator and generates radio frequency signals with certain frequency, phase and amplitude; outputting the signals to corresponding antenna units, and finally synthesizing a required emission pattern in space by the radiation signals of each dipole antenna 2;
Step three: when receiving, each T/R assembly receives the microwave signals of each unit of the antenna, forms intermediate frequency signals through down conversion, and outputs echo signals after intermediate frequency sampling processing; the method comprises the steps that a large amount of echo data output by a multipath digital T/R assembly are transmitted to a real-time signal processor through a high-speed data transmission system, and the real-time signal processor completes self-adaptive beam forming and software signal processing;
step four: and demodulating the different digital beams through the server to finally form the video signal.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a video wireless microwave transmission device, includes base plate (1) and fixes dipole antenna (2) that set up on base plate (1), its characterized in that: the dipole antenna (2) is composed of radiation patches (3) arranged up and down, the radiation patches (3) comprise transverse patches (4) arranged at the top of a substrate and deformation patches (5) arranged at the bottom of the transverse patches (4), the deformation patches (5) are symmetrically arranged along the central line of the transverse patches (4), and the deformation patches (5) at two sides are connected to form a wire slot;
the dipole antennas (2) are arranged in 16 rows by 8 columns on the substrate (1), namely 128 dipole antennas (2) in total;
The signal coverage range of the dipole antenna (2) is in a space domain with the azimuth of 120 degrees and the pitch angle of-30 degrees to 15 degrees, and the working frequency band of the dipole antenna (2) is 2.1-2.5GHz;
the acting distance of the dipole antenna (2) is more than or equal to 20km under the 5W viewing condition and more than or equal to 5km under the 100mW viewing condition.
2. A video wireless microwave transmission unit according to claim 1, wherein: the base plate (1) is fixedly arranged in the antenna framework (6), the antenna framework (6) is fixedly provided with the antenna housing (7), and one side, far away from the antenna housing (7), of the antenna framework (6) is connected with a plurality of reflecting plates (8) through bolts.
3. A video wireless microwave transmission unit according to claim 1, wherein: and a frequency source, an array power supply, a power divider and a cooling fan are also arranged in the antenna framework (6).
4. A video wireless microwave transmission unit according to claim 2, wherein: the antenna framework (6) bottom fixed mounting has base (9), base (9) bottom is provided with a pair of runing rest (10) and regulation support (11), both sides runing rest (10) are through pivot activity setting in rotatory supporting seat (12), both sides regulation support (11) are through round pin axle fixed mounting in angle regulation seat (13), rotatory supporting seat (12) and angle regulation seat (13) are all fixed mounting on mount pad (14).
5. A video wireless microwave transmission method is characterized in that: the method comprises the following steps:
step one: starting up and selecting proper signal bandwidth and working frequency, performing synchronous beam electric scanning of 16 wave positions on an airspace of which the antenna housing (7) faces 120 degrees and pitch angles are-30 degrees to 15 degrees, and tracking and measuring related microwave signals;
step two: during transmitting, the real-time signal processor generates an amplitude-phase control word of each antenna unit, controls each signal generator and generates radio frequency signals with certain frequency, phase and amplitude; outputting to corresponding antenna units, and finally synthesizing a required emission pattern in space by the radiation signals of each dipole antenna (2);
Step three: when receiving, each T/R assembly receives the microwave signals of each unit of the antenna, forms intermediate frequency signals through down conversion, and outputs echo signals after intermediate frequency sampling processing; the method comprises the steps that a large amount of echo data output by a multipath digital T/R assembly are transmitted to a real-time signal processor through a high-speed data transmission system, and the real-time signal processor completes self-adaptive beam forming and software signal processing;
step four: and demodulating the different digital beams through the server to finally form the video signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449741.3A CN111509370B (en) | 2020-05-25 | 2020-05-25 | Video wireless microwave transmission method and transmission device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010449741.3A CN111509370B (en) | 2020-05-25 | 2020-05-25 | Video wireless microwave transmission method and transmission device |
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| Publication Number | Publication Date |
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| CN111509370A CN111509370A (en) | 2020-08-07 |
| CN111509370B true CN111509370B (en) | 2024-06-07 |
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| CN202010449741.3A Active CN111509370B (en) | 2020-05-25 | 2020-05-25 | Video wireless microwave transmission method and transmission device |
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| CN111509370A (en) | 2020-08-07 |
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