KR102661393B1 - apparatus for tracking spurious by multi-angle antenna - Google Patents

Abstract

The present invention detects unwanted waves by comparing and analyzing the strength of signals received by each flat antenna in real time while moving the directional flat antennas arranged in different directions, thereby quickly detecting the origin of the unwanted waves without repeating section measurements. This is about a nuisance wave detection device using a polyhedral antenna that is easy to find while still working.
The device for detecting unwanted waves using a polyhedral antenna of the present invention is a polyhedral antenna assembly consisting of two or more planar antennas equipped with a patch antenna and facing different receiving directions, and triangulation measurement of unwanted waves incident through each planar antenna. It includes detection means to detect the origin of unwanted waves by applying the principle.
In the above-described configuration, the polyhedral antenna assembly is composed of three or more independently configured planar antennas forming an angle greater than or equal to an obtuse angle with each other.
The polyhedral antenna assembly includes one or more upper antenna groups arranged in at least the first quadrant of a rectangular coordinate system relative to a vertical line and composed of three or more planar antennas, and disposed in at least the fourth quadrant of a rectangular coordinate system relative to a vertical line and composed of three or more planar antennas. It includes a lower antenna group consisting of
The angle between each flat antenna of the upper antenna group and the vertical line is 15° to 45°, and the angle between each flat antenna of the lower antenna group and the vertical line is 0° to 15°.
Patch antennas are arranged in a square matrix of 2*2 or more.

Description

Unusual wave detection device using a polyhedral antenna {apparatus for tracking spurious by multi-angle antenna}

The present invention relates to a device for detecting unwanted waves using a polyhedral antenna. In particular, the present invention relates to a device for detecting unwanted waves using a polyhedral antenna, and in particular, detects unwanted waves by comparing and analyzing the strength of signals received by each flat antenna in real time while moving with directional flat antennas arranged in different directions. This relates to a nuisance wave detection device using a polyhedral antenna that detects and allows the origin of nuisance waves to be quickly and easily found without repeating section measurements.

As is well known, spurious waves are signals that act as noise and interference in communication systems and affect the frequencies used by mobile communication systems. In particular, they are a general term for frequency components other than the target frequency in wireless communication systems. That is. Therefore, unwanted waves are something that must be managed so that they always exist below a certain level in order to establish a smooth communication environment.

These unwanted waves may be caused by failures or oscillations of repeaters or small cells, and as communication operators increasingly use existing communication infrastructure to provide new services for next-generation mobile communication, multiple frequency bands and various mobile communication services are available. It can also occur due to service integration where methods are mixed.

On the other hand, unnecessary waves may exist due to failure or malfunction of external electronic devices other than those that make up the wireless communication network. For example, when a broadcast signal amplifier used by a wired broadcaster breaks down, the broken amplifier may generate unwanted waves that affect the surrounding wireless communication network.

These unnecessary waves not only cause damage to communication service providers, but also cause inconvenience to communication service subscribers using mobile communication. Therefore, it is necessary to quickly find and eliminate the causes of unwanted waves.

The conventional conventional unnecessary wave detection method is to find the location of unwanted waves while driving on the road while driving on a vehicle with unwanted wave detection equipment consisting of a directional antenna, a low-noise amplifier, and a spectrum analyzer.

In other words, while moving on the road with a fixed nuisance detection device mounted on a vehicle, a worker checks the nuisance estimation area based on the received electric field strength while looking at the graph screen of the spectrum analyzer, and then repeats slow-moving measurement and walking measurement again within the estimation area. This is a method of finding the origin of unnecessary waves, but not only does it require a lot of time and effort, but there is a problem that there is a large difference in efficiency depending on the experience or skill level of the operator.

In order to solve the above-mentioned problem, in prior art 1 below, the antenna is rotated 360° with the vehicle installed with the antenna rotation mechanism stopped at a specific point, the direction of unwanted wave generation is detected by the received electric field strength, and the direction of unwanted wave generation is detected by different After performing this at three points, the origin of unwanted waves is detected using triangulation.

FIG. 1 is a configuration diagram of a system for tracking a source of unwanted waves in prior art 1, and FIG. 2 is a diagram for explaining the principle of detecting a source of unwanted waves by the triangulation method in FIG. 1.

As shown in FIG. 1, according to the unwanted wave source tracking system of prior art 1, the signal received from the directional antenna 201 mounted on the roof of the vehicle is transmitted to the A/D converter after the received power is detected by the receiver 204. It is converted into a digital signal through (205) and input into the PC (208). In addition, the GPS satellite signal received by the GPS antenna 206 is input to the GPS receiver 207, the current location (latitude and longitude) is calculated, and then input to the PC 208, and the current vehicle position is calculated from the electronic compass 209. The direction is input to the PC 208.

At this time, the receiving frequency of the receiver 204 and the rotation angle of the rotor 202 connected to the rotor controller 203 are controlled by the PC 208, and the received power at the set frequency and the antenna direction at this time and the electronic compass ( The direction information of the vehicle input from 209) and the position information input from the GPS receiver 207 are comprehensively processed in the software of the PC 208, and the incident direction of the unwanted wave is calculated.

However, according to the above-mentioned prior art 1, there was a problem that not only was a complex mechanism configuration to rotate the antenna required, but also a lot of effort and time were still required because the measurement had to be performed with the vehicle stopped at three different points.

In addition, in order to detect unwanted waves in various frequency bands, a large number of directional antennas (Yagi antennas) specialized in high and low bands are required, which not only increases the scale of the system, but also requires different antenna installation heights to minimize interference between antennas. There were problems such as what had to be done.

Prior Art 1: Published Patent Publication No. 10-2000-0072645 (Name of invention: Unusual wave source tracking system)

Prior Art 2: Registered Patent Publication No. 10-1124010 (Name of invention: Antenna for nuisance wave detection device)

Prior Art 3: Publication of Patent No. 10-2018-0135520 (Title of invention: Method and device for detecting unwanted waves)

The present invention was devised to solve the above-mentioned problem, and detects unwanted waves by comparing and analyzing the strength of the signal received by each flat antenna in real time while moving the directional flat antennas arranged in different directions. The purpose is to provide a spurious wave detection device using a polyhedral antenna that can quickly and easily find the origin of spurious waves without repeating section measurements.

The nuisance wave detection device using a polyhedral antenna of the present invention to achieve the above-described object includes a polyhedral antenna assembly including two or more planar antennas with patch antennas of multiple reception bands and facing different reception directions, and each plane It includes a detection means that detects the origin of unwanted waves by applying the triangulation principle to unwanted waves incident through the antenna.

In the above-described configuration, the polyhedral antenna assembly is composed of three or more independently configured planar antennas forming an angle greater than or equal to an obtuse angle with each other.

The polyhedral antenna assembly includes one or more upper antenna groups arranged in at least the first quadrant of a rectangular coordinate system relative to a vertical line and composed of three or more planar antennas, and disposed in at least the fourth quadrant of a rectangular coordinate system relative to a vertical line and composed of three or more planar antennas. It includes a lower antenna group consisting of

The angle between each flat antenna of the upper antenna group and the vertical line is 15° to 45°, and the angle between each flat antenna of the lower antenna group and the vertical line is 0° to 15°.

Patch antennas are arranged in a square matrix of 2*2 or more.

The vertical and horizontal beam widths of each flat antenna are 10° to 30°, respectively.

Each planar antenna is configured with 45° polarization.

Between each flat antenna, it is surrounded by a metal back panel that has the same shape as each flat antenna and has a partition wall that is higher than the thickness of each flat antenna and has a height that can block radio interference to neighboring flat antennas.

Each flat antenna is composed of an assembly that is separated from each other and faces the other side, and is supported by a support bar fixed to the roof of the vehicle, and the support bar and the back of the flat antenna have a universal joint or a hinge structure so that the angle can be arbitrarily adjusted. connected by

It further includes a signal distributor that is connected to each plane antenna of the polyhedral antenna assembly and sequentially transmits signals incident from each plane antenna to the detection means.

The detection means includes a signal analyzer that analyzes the spectrum for unwanted components in a signal received from a signal distributor at one or more points.

It is further provided with a DSP that is connected to each plane antenna of the polyhedral antenna assembly and extracts only unwanted wave components from the signal incident from each plane antenna and sequentially transmits them to the detection means.

The detection means includes a signal analyzer that analyzes the spectrum for unwanted wave components received from the DSP at one or more points.

According to the nuisance wave detection device using a polyhedral antenna of the present invention, nuisance waves are detected by comparing and analyzing the intensity of nuisance waves received by each antenna in real time while moving with directional plane antennas arranged in different directions. Even with a small-sized antenna assembly, the origin of unwanted waves in a wide frequency band can be quickly and easily found without repeating measurements in the same area.

In addition, even people without background knowledge related to radio waves or antennas can easily and quickly find the origin of unwanted waves, and when an automation program is introduced, unmanned measurement is possible, so the device of the present invention can be mounted on route buses, logistics vehicles, etc. In this case, continuous and efficient radio wave management is possible over a wide area.

1 is a configuration diagram of a nuisance wave source tracking system of prior art 1.
FIG. 2 is a diagram illustrating the principle of detecting a source of unwanted waves using the triangulation method in FIG. 1.
Figure 3 is a perspective view schematically showing an embodiment of a polyhedral antenna assembly in a nuisance wave detection device using a polyhedral antenna of the present invention.
Figure 4 is an overall configuration diagram of the unwanted wave detection device using the polyhedral antenna of the present invention.
FIG. 5 is a diagram illustrating the angle formed between the upper polyhedral antenna and the lower polyhedral antenna and a vertical line in the nuisance wave detection device using the polyhedral antenna of the present invention.
Figure 6 is a graph showing an example of the frequency spectrum of unwanted waves incident on each planar antenna at a specific point in time generated by the signal analyzer of the unwanted wave detection device using the polyhedral antenna of the present invention.
FIG. 7 is a diagram illustrating a method of detecting the origin of an unwanted wave incident through the frequency spectrum of FIG. 6 based on the principle of triangulation.
Figure 8 is a graph showing an example of the frequency spectrum of unwanted waves incident on each planar antenna at multiple times generated by the signal analyzer of the unwanted wave detection device using the polyhedral antenna of the present invention.

Hereinafter, a preferred embodiment of the unwanted wave detection device using the polyhedral antenna of the present invention will be described in detail with reference to the attached drawings.

Figure 3 is a perspective view schematically showing an embodiment of a polyhedral antenna assembly in the unwanted wave detection device using the polyhedral antenna of the present invention, and Figure 4 is an overall configuration diagram of the unwanted wave detection device using the polyhedral antenna of the present invention. Figure 5 is a diagram for explaining the angle formed between the upper polyhedral antenna and the lower polyhedral antenna and a vertical line in the nuisance wave detection device using the polyhedral antenna of the present invention.

As shown in Figures 3 and 5, the nuisance wave detection device using the polyhedral antenna of the present invention uses a directional antenna, for example, a Yagi antenna, which is large in size and operates only in a specific frequency band, as in prior art 1. In order to simultaneously detect unwanted waves incident from multiple directions without rotating the antenna, a polyhedral antenna assembly 300 consisting of two or more polyhedrons, for example, three polyhedrons on top and bottom, is adopted. Hereinafter, the explanation will be given using an example of three polyhedral antennas, each upper and lower.

In the above-described polyhedral antenna assembly 300, each planar antenna 312 of the upper polyhedral antenna group 310 (hereinafter simply referred to as 'upper antenna group') is arranged to face different receiving directions. ) can be arranged to form an angle of 90° to 180°, for example, 135°, which is the interior angle of each side of a regular octagon, so that unwanted waves incident from different directions, i.e., left, front, and right, can be detected simultaneously. This upper antenna group 310 can be used to detect the origin of unwanted waves located at the same level or higher than itself in urban areas where high-rise buildings are densely located.

The lower polyhedral antenna group (hereinafter simply referred to as 'lower antenna group') 320, in which three flat antennas are arranged to face different receiving directions, also simultaneously receives unwanted waves incident from different directions, that is, from the left, front, and right. In order to be able to detect them all, they can be arranged to form an angle of 90° to 180° from each other, for example, 135°, which is the interior angle of each side of a regular octagon. This lower antenna group 320 can be used to detect the origin of unwanted waves located lower than or at the same location.

Meanwhile, as shown in FIG. 5, the angle (α) formed by the upper antenna group 310 and the vertical line may be 0° to 60°, for example, 15°, and the angle (α) formed by the lower antenna group 320 and the vertical line may be 0° to 60°, for example, 15°. The angle (β) may be, for example, 0° to 45°, preferably 0° to 15°.

Each of the planar antennas 312 and 322 is implemented as a planar patch antenna. However, in order to increase reception gain, a plurality of patch antennas 312a and 322a, for example, four patch antennas, are installed in one planar antenna. It can be arranged in rows*2 columns.

In addition, the patch antennas 312a and 322a constituting each flat antenna 312 accommodate various frequencies, for example, 3G or 4G LTE frequency bands and 5G frequency bands, for example, 100 MHz to 3.8 GHz. It can be appropriately designed and arranged to do so. The vertical and horizontal beam widths of each of the flat antennas 312 and 322 may be 10° to 30°, for example, 20°. Additionally, each of the flat antennas 312 and 322 can be implemented with 45° polarization.

Meanwhile, by arranging each of the flat antennas 312 and 322 adjacent to each other, between each flat antenna 312 of the upper antenna group 310 and the upper and lower antennas of the upper and lower antenna groups 310 and 320 ( Radio interference may occur between 312) and 322. To prevent this, a metal partition 314 is provided between each of the planar antennas 312 and 322, for example, each planar antenna 312 and 322. It is preferably surrounded by a metal back panel that has the same shape as and has a partition wall 314 that is higher than the thickness of each flat antenna 312 and 322 and has a height that can block radio interference to neighboring flat antennas. .

Each of the flat antennas 312 and 322 is configured as an assembly to face different receiving directions while being separated from each other, and is supported by support bars fixed to the roof of the vehicle. The angles of these support bars and the back of the flat antenna can be arbitrarily adjusted. It is connected by a hinge of a universal joint or hinge structure so that it can be connected.

The vertical and horizontal beam angles of each planar antenna 312 and 3220 may be changed manually or automatically.

Meanwhile, even if unwanted waves are radiated from the same source, the amplitude and phase of the received signal incident on each of the planar antennas 312 and 322 are different because each of the planar antennas 312 and 322 faces different directions. occurs. In the present invention, the direction of unwanted waves is estimated by comparing the amplitudes of the same signals received by each planar antenna 312 and 322, and then the difference in the amplitude of the received signal of each planar antenna 312 and 322 is used. This detects the origin of unwanted waves.

That is, the planar antennas 312 and 322, which are composed of a plurality of patch antennas 312a and 322a that have the same characteristics and cover a wide frequency band, are arranged to face different directions, and each planar antenna 312 ), (322) is kept constant, the intensity of the unwanted wave incident on each plane antenna (312, 322) from the origin of unwanted wave generation is increased from the origin of unwanted wave to each plane. It varies depending on the difference in incident angle between the antennas 312 and 322.

And at this time, the direction in which the flat antenna 312, 322, which has the best reception sensitivity for unwanted waves, is facing can be estimated as the direction of unwanted wave radiation, and the flat antennas 312, which have the second and third best reception sensitivity, By comparing the direction and reception sensitivity of 322 with that of a flat antenna with the best reception sensitivity, the distance between the origin of unwanted waves and the polyhedral antenna assembly 300 can be estimated based on the principle of triangulation.

Meanwhile, as shown in FIG. 4, the unwanted wave detection device using the polyhedral antenna of the present invention is connected to the polyhedral antenna assembly 300 and each of the planar antennas 312 and 322 of the polyhedral antenna assembly 300. For example, the original signal is filtered out from the signals received from each of the flat antennas 312 and 322 in a one-to-one connection, and only the unwanted waves are extracted and transmitted to the signal analyzer 500, for example, simultaneously or sequentially. The unwanted waves received from each of the planar antennas 312 and 322 are analyzed in real time through the DSP (Digital Signal Processor) 400 and each DSP 400 to generate a frequency spectrum, that is, an amplitude vs. frequency graph. And based on this, it may include a signal analyzer (Spectrum Analyzer) 500 that detects the origin of unwanted waves.

In the above-described configuration, the signal analyzer 500 may be equipped with a GPS receiver to determine the current location of the vehicle, and in addition, a map DB and an automatic detection program for the origin of unwanted waves are provided to display the origin of unwanted waves on a map. It could be. In contrast, the map DB and the automatic detection program for the origin of unwanted waves may be installed in an analysis PC (not shown) connected to the signal analyzer 500.

Meanwhile, depending on the direction of movement of the vehicle and the location of the origin of unwanted waves, unwanted waves may be incident only on either the upper antenna group 310 or the lower antenna group 320. Alternatively, unwanted waves may be incident on the flat antennas 312 and 322 in all directions of the upper antenna group 310 or the lower antenna group 320. Unwanted waves may be incident only through the flat antennas 312 and 322 in one or two directions.

Among the various situations described above, when unnecessary waves exceeding a standard value are incident on all of the flat antennas forming the upper antenna group or the lower antenna group, the origin of the unwanted waves can be detected at the point where the vehicle is currently located by the principle of triangulation. On the other hand, if unwanted waves exceeding the standard value are incident only on one or two of the flat antennas forming the upper or lower antenna group, the vehicle must be moved to another location, that is, the plurality of frequency spectra received while driving may be transmitted. Through analysis, it will be possible to detect the origin of unwanted waves.

Figure 6 is a graph showing an example of the frequency spectrum of unwanted waves incident on each flat antenna at a specific time generated by the signal analyzer of the unwanted wave detection device using the polyhedral antenna of the present invention, and Figure 7 shows the frequency spectrum of Figure 6. This is a diagram to explain a method of detecting the origin of an unwanted wave incident through a beam using the principle of triangulation.

In Figure 7, reference numbers 312a1, 312a2, and 312a3 represent the first, second, and third planar antennas of the upper antenna group, respectively, S represents an unwanted wave of the same component, and SP represents the generation of an unwanted wave of the same component. Indicates the origin.

As shown in FIG. 7, for example, when an unwanted wave exceeding a reference value is incident on all the flat antennas 312a1, 312a2, and 312a3 of the upper antenna group 310 at a specific time, the signal analyzer 500 or The analysis PC connected here can detect the origin of unwanted waves by the principle of triangulation based on the intensity (amplitude) information of the same unwanted wave.

Figure 8 is a graph showing an example of the frequency spectrum of unwanted waves incident on each planar antenna at multiple times generated by the signal analyzer of the unwanted wave detection device using the polyhedral antenna of the present invention. As shown in Figure 8, when unwanted waves are not incident through a flat antenna in all directions, it is impossible to detect the origin of unwanted waves due to the triangulation principle, so multiple viewpoints, for example, two or more different viewpoints The change in the amplitude (intensity) of the unwanted wave in the frequency spectrum generated in the frequency spectrum, that is, the incident direction and distance of the unwanted wave change according to the distance traveled by the vehicle according to the measurement time period. Based on the information, the unnecessary wave is generated by the principle of triangulation. The origin can be detected.

On the other hand, while driving on the road in a vehicle equipped with the unnecessary wave detection equipment of the present invention, the movement path is checked on the map screen in real time, and if the origin of unwanted waves is detected, this is immediately notified to the operator to take immediate action and improvement. This may be possible.

Above, a preferred embodiment of the unwanted wave detection device using the polyhedral antenna of the present invention has been described in detail with reference to the attached drawings, but this is only an example, and various modifications and changes are possible within the scope of the technical idea of the present invention. . Therefore, the scope of rights of the present invention should be determined by the description of the claims below.

For example, a simple sequential signal distributor may be adopted instead of the DSP 400. In this case, unwanted wave detection may be performed in the signal analyzer 500 itself through an automation program.

The upper antenna group 310 may be further divided into two or three stages at different angles to the vertical line, and the present invention may be configured with only the upper antenna group 320 without the lower antenna group 320.

Meanwhile, in this specification, the singular form also includes the plural form unless specifically mentioned. As used in the specification, elements, steps, operations and/or elements referred to as “comprise” and/or “comprising” do not exclude the presence or addition of one or more other elements, steps, operations and/or elements. .

Additionally, the term 'or' means an inclusive OR rather than an exclusive OR.

Additionally, as used in this specification and claims, the singular expressions “a,” “an,” and “the” should generally be construed to mean “one or more,” unless otherwise indicated or it is clear from the context that the singular refers to singular forms.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

Claims (13)

delete A polyhedral antenna assembly, which is mounted on a moving vehicle, has a patch antenna, and includes three or more independently configured planar antennas facing different receiving directions but forming an angle greater than or equal to an obtuse angle to each other.
A nuisance detection device using a polyhedral antenna that includes detection means for detecting the origin of nuisance waves by applying the triangulation principle to nuisance waves incident through each flat antenna. In claim 2,
The polyhedral antenna assembly includes at least one upper antenna group consisting of three or more planar antennas and disposed in at least one quadrant of a rectangular coordinate system based on a vertical line, and
A nuisance wave detection device using a polyhedral antenna, characterized in that it is disposed in at least the fourth quadrant of a rectangular coordinate system based on a vertical line and includes a lower antenna group consisting of three or more planar antennas. In claim 3,
The angle between each flat antenna of the upper antenna group and the vertical is 15° to 45°,
A nuisance wave detection device using a polyhedral antenna, characterized in that the angle between each flat antenna of the lower antenna group and the vertical line is 0° to 15°. In claim 3,
A patch antenna is a nuisance wave detection device using a polyhedral antenna, characterized in that the patch antenna is arranged in a square matrix of 2*2 or more. In claim 5,
A nuisance wave detection device using a polyhedral antenna, characterized in that the vertical and horizontal beam widths of each planar antenna are 10° to 30°, respectively. In claim 5,
A nuisance wave detection device using a polyhedral antenna, wherein each flat antenna is configured with a 45° polarization. In claim 5,
Between each flat antenna, a polyhedron is surrounded by a metal back panel that has the same shape as each flat antenna and has a partition wall that is higher than the thickness of each flat antenna and has a height that can block radio interference to neighboring flat antennas. A nuisance wave detection device using an antenna. In claim 5,
Each flat antenna is composed of an assembly that is separated from each other and faces a different receiving direction, and is supported by a support bar fixed to the roof of the vehicle. The support bar and the back of the flat antenna have a universal joint or hinge structure so that the angle can be arbitrarily adjusted. A nuisance wave detection device using a polyhedral antenna connected by a hinge. The method according to any one of claims 2 to 9,
A nuisance wave detection device using a polyhedral antenna, characterized in that it further includes a signal distributor connected to each plane antenna of the polyhedral antenna assembly and sequentially transmitting signals incident from each plane antenna to the detection means. In claim 10,
An unwanted wave detection device using a polyhedral antenna, characterized in that the detection means includes a signal analyzer that analyzes a spectrum for unwanted wave components in a signal received from a signal distributor at one or more points. The method according to any one of claims 2 to 9,
An unwanted wave detection device using a polyhedral antenna, further comprising a DSP connected to each flat antenna of the polyhedral antenna assembly, extracting only unwanted wave components from the signal incident from each flat antenna, and sequentially transmitting the unwanted wave components to the detection means. In claim 12,
An unwanted wave detection device using a polyhedral antenna, characterized in that the detection means includes a signal analyzer that analyzes the spectrum of unwanted wave components received from the DSP at one or more points.