CN107834199B - Intelligent active lightning protection antenna and lightning protection system - Google Patents
Intelligent active lightning protection antenna and lightning protection system Download PDFInfo
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- CN107834199B CN107834199B CN201711252628.0A CN201711252628A CN107834199B CN 107834199 B CN107834199 B CN 107834199B CN 201711252628 A CN201711252628 A CN 201711252628A CN 107834199 B CN107834199 B CN 107834199B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Abstract
The invention relates to an intelligent active lightning protection antenna and a lightning protection system, wherein the lightning protection antenna comprises a dielectric plate, and a vertical polarization component and a horizontal polarization component which are arranged on the dielectric plate; the vertical polarization component is sequentially connected with the coaxial cable and the controlled switch; the horizontal polarization component is connected with the coaxial cable. The invention can greatly reduce the relation between the protection action of the lightning protection device and the lightning current wave pattern, thereby effectively improving the protection effect.
Description
Technical Field
The invention relates to the technical field of lightning protection, in particular to an intelligent active lightning protection antenna and a lightning protection system.
Background
In the prior lightning protection technology at present, the lightning protection of an antenna by using an antenna feeder lightning arrester (SPD) is the mainstream practice, namely, the antenna feeder SPD is additionally arranged on a signal line at the rear end of the antenna for protection. It is known that the lightning phenomenon is extremely complex and random. The SPD design and construction are designed aiming at the statistical characteristics of lightning, so that the SPD device is a determined artifact and cannot be changed once the SPD device is determined. Thus, the institute of science and electrical engineering Zhang Shichang institute of china deems that: the protection feature of SPD is to strain a lightning strike event of a deformation mole test with a constant fixed design, which may fail causing an accident, i.e. with certainty.
In addition, the existing antenna feeder SPDs are designed for direct lightning, and protection against inductive lightning is not considered. The general field communication system, such as the antenna on the iron tower of the communication base station, has a good lightning receiving system beside the communication base station, such as: lightning conductors, down-conductors, etc., so that there are more cases of inductive lightning.
In summary, the current main stream protection means has a very close relationship with the lightning current waveform on the aspect of the protection of direct lightning, so that the effectiveness of the protection means is limited; on the other hand, protection against inductive mines has not been fully considered and designed. Therefore, there are a great deal of improvements and perfection in antenna lightning protection using antenna feeder SPDs.
In addition, an active lightning protection antenna using a patch/microstrip line unit was proposed by Mano d.judd et al in the united states in 2000, but the antenna was designed mainly for eliminating static charges accumulated on the antenna unit, and the antenna also had no intelligent characteristics.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent active lightning protection antenna and an intelligent active lightning protection system, which can greatly reduce the relation between the protection action of a lightning protection device and the lightning current wave pattern, thereby effectively improving the protection effect.
The invention solves the technical problems, and takes a microstrip antenna working at about 900MHz as an example, the technical scheme is as follows:
an intelligent active lightning protection antenna comprises a dielectric plate, and a vertical polarization component and a horizontal polarization component which are arranged on the dielectric plate; the vertical polarization component is sequentially connected with the first coaxial cable and the controlled switch; the horizontal polarization assembly is connected with the second coaxial cable.
The beneficial effects of the invention are as follows: when the external equipment monitors the upward pilot generated on the ground object tip (such as a lightning rod), immediately sending a lightning attack early warning signal to the microwave switch, and closing a signal channel of the vertical polarization component connected with the microwave switch by the microwave switch, namely, enabling lightning to be coupled into a channel at the rear end of the antenna through the vertical polarization component to be cut off, so that part of energy cannot reach the rear end equipment of the antenna, and the purpose of protecting the rear end electronic equipment is achieved. The vertical polarization component is cut off to complete the protection action before the lightning progresses to the ground and strikes the ground, so the lightning protection antenna is irrelevant to the pulse current wave pattern generated by the lightning strike back and whether the lightning strike is direct or inductive.
When lightning hits an object near an antenna, such as a lightning rod on an iron tower of a mobile communication base station, electromagnetic energy of the lightning is coupled into a signal wire connected with the antenna through the antenna, interference or damage/disaster threat is formed to electronic equipment connected with the signal wire at the rear end, the electromagnetic energy of the lightning is most easily coupled through a vertical polarization component, and the coupling efficiency of the electromagnetic energy of the lightning and a horizontal polarization component is extremely low, so that after the two signals are separately and independently received and fed, a signal channel of the vertical polarization component can be closed before the lightning attacks, so that main energy of the lightning cannot enter the signal wire, and the purposes of protecting and resisting interference to the rear-end electronic equipment can be achieved.
Further, the horizontal polarization component comprises a first horizontal radiation patch and a second horizontal radiation patch which are arranged on the upper surface of the dielectric plate, a first horizontal grounding plate and a second horizontal grounding plate which are respectively symmetrical to the first horizontal radiation patch and the second horizontal radiation patch in position and are arranged on the lower surface of the dielectric plate, and a horizontal connecting bridge AC; the first horizontal radiation patch is provided with a first connecting hole, an inner lead a1 of the second coaxial cable penetrates through the dielectric plate and is connected with an end A of the horizontal connecting bridge AC at the first connecting hole, and the first coaxial cable is connected with the second horizontal radiation patch through the horizontal connecting bridge AC; the first horizontal radiating patch is not connected with the horizontal connecting bridge AC, but is connected with the first horizontal grounding plate through a first connecting column; the C-terminal of the connecting bridge AC is connected to the second ground plate through the first metal post.
The beneficial effect of adopting the further scheme is that: the structure can lead the antenna to obtain better reflection coefficient S11 and transmission coefficient S21, wherein the S11 parameters are below-12 dB about 900MHz, and the S21 parameters are below-30 dB about 900 MHz.
Further, the vertical polarization component comprises a first vertical radiation patch and a second vertical radiation patch which are arranged on the upper surface of the dielectric plate, a first vertical grounding plate and a second vertical grounding plate which are respectively symmetrical to the positions of the first vertical radiation patch and the second vertical radiation patch and are arranged on the lower surface of the dielectric plate, and a vertical connecting bridge BD; the first vertical radiation patch is provided with a second connecting hole, the outer conductor of the first coaxial cable is connected with the first vertical grounding plate, the inner conductor B1 of the first coaxial cable penetrates through the dielectric plate and is connected with the end B of the vertical connecting bridge BD at the second connecting hole, and the first coaxial cable is connected with the second vertical radiation patch through the vertical connecting bridge BD; the first vertical radiation patch is not connected to the vertical connection bridge BD, but the first vertical radiation patch is connected to the first vertical ground plate through a second connection post; the D end of the vertical connection bridge BD is connected to the second vertical ground plate through a second metal pillar.
The beneficial effect of adopting the further scheme is that: this structure can make the antenna obtain a good reflection coefficient S11 and transmission coefficient S21.
Further, the cable assembly further comprises a support plate, and the first coaxial cable and the second coaxial cable penetrate through the support plate; the first metal column and the second metal column extend outwards and are fixedly connected with the supporting plate.
Further, be provided with ground connection metal paster in the backup pad, the outer conductor of first coaxial cable, the outer conductor of second coaxial cable, first metal column and second metal column all connect metal paster.
The beneficial effect of adopting the further scheme is that: the supporting plate, the grounding metal patch, the first metal column and the second metal column form a balun structure of the antenna, and the reflection coefficient S11 and the transmission coefficient S21 of two channels, namely vertical polarization and horizontal polarization, of the antenna are optimized together.
Further, the controlled switch is a microwave switch.
The beneficial effect of adopting the further scheme is that: when the microwave switch is in a communication state, signals received and transmitted through the antenna vertical polarization component can smoothly pass through, but when the switch receives a lightning attack early warning signal sent by a signal processing and early warning module in a later system structure diagram, an antenna vertical polarization signal channel connected with the switch is closed within 100 mu s, a path of lightning coupling into a vertical polarization channel of a rear-end electronic system is cut off in advance, and the relation between the protection characteristic of lightning protection equipment and a lightning back-striking current wave mode is reduced, so that the protection effect of the protection system is improved.
In addition, the invention also provides an intelligent active lightning protection system, which comprises any lightning protection antenna, and a radio frequency unit, an A/D conversion module and a demodulator which are sequentially connected with the lightning protection antenna, wherein the signal input end of a controlled switch of the lightning protection antenna is connected with the signal output end of a signal processing and early warning module, and the signal input end of the signal processing and early warning module is connected with a magnetic antenna and an induction coil for monitoring the current of a lightning rod.
The beneficial effects of the invention are as follows: the signal processing and early warning module carries out filtering and denoising processing on lightning current generated by an uplink connection pilot and magnetic field pulse generated by a downlink step pilot acquired by a magnetic antenna; when the signal processing and early warning module obtains the early warning signal of the equipment to be protected or the vicinity thereof, a control signal is output to the controlled switch of the lightning protection antenna, so that the vertical polarization component which is most easy to couple with lightning of the antenna is cut off before the first impact, and the main energy of the lightning electromagnetic field cannot be coupled to the rear-end equipment through the vertical polarization component of the antenna, thereby achieving the purpose of effectively improving the lightning protection reliability of the communication electronic equipment by using the antenna.
Drawings
FIG. 1 is a schematic diagram of induced voltage when the antenna of the present invention is vertically polarized;
FIG. 2 is a schematic diagram of the induced voltage of the antenna of the present invention when it is polarized horizontally;
FIG. 3 is a graph showing the trend of the peak voltage induced at the rear end of the antenna according to the present invention along with the change of the polarization deflection angle of the antenna;
FIG. 4 is a schematic view of a connecting bridge structure according to the present invention;
FIG. 5 is a schematic diagram of a vertical polarization assembly and a horizontal polarization assembly of the antenna of the present invention;
FIG. 6 is a graph of the reflection coefficient S11 of the antenna of the present invention;
fig. 7 is a diagram of an antenna transmission coefficient S21 according to the present invention;
fig. 8 is a balun structure diagram of an antenna of the present invention;
fig. 9 is an overall structure diagram of an antenna according to the present invention;
fig. 10 is a schematic diagram of the system of the present invention.
In the figure, 1-a first horizontal radiating patch; 2-a first vertical radiating patch; 3-a second horizontal radiating patch 3; 4-a second vertical radiating patch; 5-dielectric plate; 6-a first connection hole; 7-a second connection hole; 8-a first connection post; 9-a second connection post; 10-a first metal column; 11-a second metal column; 12-supporting plates; 13-a second coaxial cable; 14-first coaxial cable.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Through analysis and research, the dipole antenna is in a vertical polarization state, the polarization characteristic of the dipole antenna is matched with the electric field direction near a lightning channel, and the dipole antenna is completely unmatched in a horizontal polarization state. The polarization mode of the antenna is very important for the protection and anti-interference of the back-end equipment for the antenna installed on the communication tower and most probably near the lightning channel.
The coupling effect of the antenna was analyzed below for different polarization states, with the antenna being set at a distance of 29m from the ground (30 m from the tower (including the lightning rod)) at a distance of 1m from the tower. The deflection angle of the antenna is 0 degrees when vertically polarized, and 90 degrees when horizontally polarized. The induced voltages at the rear end of the antenna are shown in fig. 1 and 2 when the deflection angles are 0 and 90 degrees, respectively. As can be seen, the induced voltage is maximum when the antenna is vertically polarized, and its peak value can reach 101.8V. As the deflection angle increases, the antenna induced voltage gradually becomes smaller until the antenna induced voltage reaches a minimum value, almost 0, at the time of horizontal polarization.
In order to observe the change rule of the induced voltage peak value at the rear end of the antenna along with the rotation angle of the antenna, two observation points are additionally arranged, the distance between the two observation points and the iron tower is 1m, the distance between the two observation points and the ground is 25m and 20m respectively, the deflection angle is calculated from 0 to 90 degrees according to every 15 degrees, 7 deflection angles are analyzed, and the curve fitting is carried out on the induced voltage peak values at the rear end of the antenna positioned at the three observation points by combining the calculation results of the antenna 29m away from the ground, so that the trend of the induced voltage peak value at the rear end of the antenna along with the change of the deflection angle is shown in fig. 3.
As can be seen from fig. 3, the peak value of the induced voltage at the rear end of the antenna has an approximate linear relationship with the deflection angle (the relevant parameters of the fitting curve are shown in table 1), and table 1 shows the slope and intercept of the fitting straight line under three conditions, wherein the slope represents the change rate of the peak value of the induced voltage at the rear end with the deflection angle, and the intercept represents the peak value of the induced voltage at the rear end when the antenna is vertically polarized. As can be seen from Table 1, the slope was greatly changed and the intercept was greatly changed at 29-25 m; whereas at 25m-20m the slope and intercept variation becomes significantly smaller.
TABLE 1 fitting Curve parameters
| Height of antenna from ground (m) | Slope of | Intercept (V) |
| 29 | 1.06493 | -101.4552 |
| 25 | 0.21986 | -21.40393 |
| 20 | 0.18273 | -16.67523 |
It follows that when the antenna is near the pylon, whatever the height it is located, the vertical polarization component is always the most easily coupled portion of the lightning electromagnetic energy, while the horizontal polarization is always the most difficult to couple portion.
Thus, based on the above analysis, as shown in fig. 4 to 9, the present invention provides an intelligent active lightning protection antenna, comprising a dielectric plate 5, and a vertical polarization component and a horizontal polarization component disposed on the dielectric plate 5; the vertical polarization component is sequentially connected with a first coaxial cable 14 and a controlled switch; the horizontal polarization assembly is connected to a second coaxial cable 13 and the controlled switch may be a microwave switch. The vertical polarization component and the horizontal polarization component of the antenna are separated into two channels for receiving and then combined at the rear end, but a controlled switch (microwave switch) is arranged on the vertical polarization component before the combination, when an external device monitors an uplink pilot generated on the tip of a ground feature (such as a lightning rod), a lightning attack early warning signal is immediately sent to the microwave switch, and the microwave switch closes a signal channel connected with the vertical polarization component, namely, the channel of lightning which is coupled into the rear end of the antenna through the vertical polarization component is cut off, so that part of energy cannot reach the rear end equipment of the antenna, and the purpose of protecting the rear end electronic equipment is achieved. The vertical polarization component is cut off to complete the protection action before the lightning progresses to the ground and strikes the ground, so the lightning protection antenna is irrelevant to the pulse current wave pattern generated by the lightning strike back and whether the lightning strike is direct or inductive.
When lightning hits an object near an antenna, such as a lightning rod on an iron tower of a mobile communication base station, electromagnetic energy of the lightning is coupled into a signal wire connected with the antenna through the antenna, interference or damage/disaster threat is formed to electronic equipment connected with the signal wire at the rear end, the electromagnetic energy of the lightning is most easily coupled through a vertical polarization component, and the coupling efficiency of the electromagnetic energy of the lightning and a horizontal polarization component is extremely low, so that after the two signals are separately and independently received and fed, a signal channel connected with the vertical polarization component can be closed before the lightning attacks, so that main energy of the lightning cannot enter the signal wire, and the purposes of protecting and resisting interference to the rear-end electronic equipment can be achieved.
The horizontal polarization assembly comprises a first horizontal radiation patch 1 and a second horizontal radiation patch 3 which are arranged on the upper surface of the dielectric plate 5, a first horizontal grounding plate 1', a second horizontal grounding plate 3' and a horizontal connecting bridge AC, wherein the first horizontal grounding plate 1 'and the second horizontal grounding plate 3' are respectively arranged on the lower surface of the dielectric plate 5 and are symmetrical to the first horizontal radiation patch 1 and the second horizontal radiation patch 3 in position; the first horizontal radiation patch 1 is provided with a first connecting hole 6, the inner lead a1 of the second coaxial cable 13 penetrates through the dielectric plate 5 and is connected with the end A of the horizontal connecting bridge AC at the first connecting hole 6, and the second coaxial cable 13 is connected with the second horizontal radiation patch 3 through the horizontal connecting bridge AC; the first horizontal radiating patch 1 is not connected to the horizontal connecting bridge AC, but the first horizontal radiating patch 1 is connected to the first horizontal ground plate 1' through the first connecting post 8; the C-terminal of the connecting bridge AC is connected to the second ground plate 3' by means of a first metal post 10.
The vertical polarization component comprises a first vertical radiation patch 2 and a second vertical radiation patch 4 which are arranged on the upper surface of the dielectric plate 5, a first vertical grounding plate 2', a second vertical grounding plate 4' and a vertical connecting bridge BD, wherein the first vertical grounding plate 2 'and the second vertical grounding plate 4' are respectively arranged on the lower surface of the dielectric plate 5 and are symmetrical to the first vertical radiation patch 2 and the second vertical radiation patch 4 in position; the first vertical radiation patch 2 is provided with a second connecting hole 7, the outer conductor of the first coaxial cable 14 is connected with the first vertical grounding plate 2', the inner conductor B1 of the first coaxial cable 14 penetrates through the dielectric plate 5 and is connected with the end B of the vertical connecting bridge BD at the position of the second connecting hole 7, and the second coaxial cable 14 is connected with the second vertical radiation patch 4 through the vertical connecting bridge BD; the first vertical radiation patch 2 is not connected to the vertical connection bridge BD, but the first vertical radiation patch is connected to the first vertical ground plate 2' through the second connection post 9; the D-terminal of the vertical connection bridge BD is connected to the second vertical ground plate 4' through a second metal post 11.
As shown in fig. 6 and 7, the antenna can obtain better reflection coefficient S11 and transmission coefficient S21 by adopting the structure of the vertical polarization component and the horizontal polarization component, the S11 parameters are below-12 dB about 900MHz, and the S21 parameters are below-30 dB about 900 MHz.
As shown in fig. 8, the coaxial cable connector further comprises a support plate 12, and a first coaxial cable 14 and a second coaxial cable 13 penetrate through the support plate 12; the first metal post 10 and the second metal post 11 are both extended outwards and fixedly connected with the support plate 12. The support plate 12 is provided with a grounding metal patch, and the outer conductor of the first coaxial cable 14, the outer conductor of the second coaxial cable 13, the first metal column 10 and the second metal column 11 are all connected with the metal patch. The supporting plate, the grounding metal patch, the first metal column and the second metal column form a balun structure of the antenna, and the reflection coefficient S11 and the transmission coefficient S21 of two channels, namely vertical polarization and horizontal polarization, of the antenna are optimized together.
In addition, as shown in fig. 10, the invention further provides an intelligent active lightning protection system based on the intelligent active lightning protection antenna, which comprises the lightning protection antenna, and a signal processing and early warning module, a radio frequency unit, an A/D conversion module and a demodulator which are sequentially connected with the lightning protection antenna, wherein the signal input end of a controlled switch of the lightning protection antenna is connected with the signal output end of the signal processing and early warning module, and the signal input end of the signal processing and early warning module is connected with the magnetic antenna and an induction coil for monitoring the current of a lightning rod.
Since the placement of the antenna may be arbitrary, it is considered that the port B is an interface to which the horizontally polarized component of the antenna is connected, and the port a is an interface to which the vertically polarized component is connected, and thus a controlled active signal surge protector, that is, a signal SPD including a microwave switch, needs to be connected to the port a, and the microwave switch needs to withstand a voltage of about several tens to one hundred volts, and the specific amplitude needs to be determined according to the installation position of the antenna. When lightning strikes the surface, after receiving the early warning signal generated by the signal processing and early warning module, the microwave switch on the port A channel cuts off the signal line, so that the energy coupled by vertical polarization cannot reach the rear end, and the port B channel works normally, so that the main energy (the part of energy is also the component forming the greatest threat) of the lightning electromagnetic pulse coupled into the line by the antenna vertical polarization component can be blocked outside the rear end electronic equipment, and the purpose of protecting the rear end equipment is achieved.
The signal processing and early warning module carries out filtering and denoising processing on lightning current generated by an uplink connection pilot and magnetic field pulse generated by a downlink step pilot acquired by a magnetic antenna;
judging signals collected by the induction coil (or the coaxial shunt);
judging magnetic field pulses on the magnetic antenna;
when the coil (or coaxial shunt) and the magnetic antenna meet the relevant conditions (signal judgment conditions obtained by the induction coil or coaxial shunt) simultaneously (1) whether the half-peak width of the lightning current pulse signal is 1-50 microseconds.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (5)
1. An intelligent active lightning protection antenna is characterized by comprising a dielectric plate (5), and a vertical polarization component and a horizontal polarization component which are arranged on the dielectric plate (5); the vertical polarization component is sequentially connected with a first coaxial cable (14) and a controlled switch; the horizontal polarization component is connected with a second coaxial cable (13); the controlled switch is used for receiving a lightning attack early warning signal when the external equipment monitors an uplink pilot generated on the ground object tip and closing a signal channel connected with the vertical polarization component; the horizontal polarization assembly comprises a first horizontal radiation patch (1) and a second horizontal radiation patch (3) which are arranged on the upper surface of the dielectric plate (5), a first horizontal grounding plate (1 '), a second horizontal grounding plate (3') and a horizontal connecting bridge AC, wherein the first horizontal grounding plate (1 ') and the second horizontal grounding plate (3') are respectively arranged on the lower surface of the dielectric plate (5) and are symmetrical to the first horizontal radiation patch (1) and the second horizontal radiation patch (3); the first horizontal radiation patch (1) is provided with a first connecting hole (6), the inner conductor a1 of the second coaxial cable (13) penetrates through the dielectric plate (5) and is connected with the end A of the horizontal connecting bridge AC at the first connecting hole (6), and the second horizontal radiation patch (3) is connected with the first horizontal radiation patch through the horizontal connecting bridge AC; the first horizontal radiation patch (1) is not connected with the horizontal connecting bridge AC, but the first horizontal radiation patch (1) is connected with the first horizontal grounding plate (1') through the first connecting column (8); the C end of the connecting bridge AC is connected with the second horizontal grounding plate (3') through a first metal column (10); the vertical polarization component comprises a first vertical radiation patch (2) and a second vertical radiation patch (4) which are arranged on the upper surface of the dielectric plate (5), a first vertical grounding plate (2 '), a second vertical grounding plate (4') and a vertical connecting bridge BD, wherein the first vertical grounding plate (2 ') and the second vertical grounding plate (4') are respectively arranged on the lower surface of the dielectric plate (5) and are symmetrical to the first vertical radiation patch (2) and the second vertical radiation patch (4); the first vertical radiation patch (2) is provided with a second connecting hole (7), the outer conductor of the first coaxial cable (14) is connected with the first vertical grounding plate (2'), the inner conductor B1 of the first coaxial cable (14) penetrates through the dielectric plate (5) and is connected with the end B of the vertical connecting bridge BD at the second connecting hole (7), and the first coaxial cable is connected with the second vertical radiation patch (4) through the vertical connecting bridge BD; the first vertical radiation patch (2) is not connected with the vertical connection bridge BD, but the first vertical radiation patch is connected with the first vertical grounding plate (2') through the second connection column (9); the D-terminal of the vertical connection bridge BD is connected to the second vertical ground plate (4') through a second metal post (11).
2. The intelligent active lightning protection antenna of claim 1, further comprising a support plate (12), wherein the first coaxial cable (14) and the second coaxial cable (13) each extend through the support plate (12); the first metal column (10) and the second metal column (11) extend outwards and are fixedly connected with the supporting plate (12).
3. The intelligent active lightning protection antenna according to claim 2, wherein a grounding metal patch is arranged on the supporting plate (12), and the outer conductor of the first coaxial cable (14), the outer conductor of the second coaxial cable (13), the first metal column (10) and the second metal column (11) are all connected with the metal patch.
4. The intelligent active lightning protection antenna of claim 1, wherein the controlled switch is a microwave switch.
5. An intelligent active lightning protection system, which is characterized by comprising the lightning protection antenna according to any one of claims 1 to 4, and a radio frequency unit, an A/D conversion module and a demodulator which are sequentially connected with the lightning protection antenna, wherein a signal input end of a controlled switch of the lightning protection antenna is connected with a signal output end of a signal processing and early warning module, and a signal input end of the signal processing and early warning module is connected with a magnetic antenna and an induction coil for monitoring lightning rod current.
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| CN112290228B (en) * | 2020-12-29 | 2021-03-16 | 成都信息工程大学 | Lightning protection method of line-circular polarization reconfigurable antenna |
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| US6362787B1 (en) * | 1999-04-26 | 2002-03-26 | Andrew Corporation | Lightning protection for an active antenna using patch/microstrip elements |
| JP4583642B2 (en) * | 2001-03-19 | 2010-11-17 | 日本高圧電気株式会社 | Distribution board with lightning arrester |
| JP4555275B2 (en) * | 2006-11-09 | 2010-09-29 | Ｎｅｃアクセステクニカ株式会社 | Lightning protection system |
| JP5135317B2 (en) * | 2009-11-04 | 2013-02-06 | 株式会社ホンダエレシス | On-vehicle radar device and program |
| KR101318830B1 (en) * | 2010-09-07 | 2013-10-17 | 쿤지에 쭈앙 | Dual-polarized microstrip antenna |
| EP3358365A4 (en) * | 2015-09-29 | 2019-05-01 | Mitsubishi Electric Corporation | Dual-polarization radar device and radar signal processing method |
| CN207441971U (en) * | 2017-12-01 | 2018-06-01 | 成都信息工程大学 | A kind of intelligence active lightning protection antenna and lightning-protection system |
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