KR100724064B1 - High performance antenna for detection and wave monitoring system using the same - Google Patents

Abstract

According to the present invention, a high gain antenna is installed in various directions for each frequency band to simultaneously receive radio waves arriving from various directions to compare and calculate the frequency, time, reception level, and phase of the received radio waves to detect illegal radio wave radiation positions. The present invention relates to a radio wave monitoring system using a high performance antenna for radio wave point detection. Such a system of the present invention receives at least three or more detection base stations capable of detecting radio signals in all directions, and is connected to the detection base station by wire or wireless communication network to receive detection data transmitted from each detection base station to receive radio wave maps of a corresponding region. It consists of a central radio monitoring and control center that detects and manages the location, transmission frequency, radio transmission time, magnitude of transmission power, and the like of illegal radio waves. Detection antennas for receiving a, a band selection switch, a receiver, and a sub-controller for generating detection data for a radio source using the strength and phase information of the signal received from each receiver. According to the present invention it is possible to control the illegal use of radio waves by accurately detecting and recording the position and frequency of the illegal radio wave source, the size of the transmission signal, the transmission time.

Illegal propagation, radio wave detection, base station, logarithmic antenna, parabola, position, control

Description

High performance antenna for detection and wave monitoring system using the same

Figure 1a is a schematic diagram showing an example of a conventional radio wave detection antenna,

Figure 1b is a schematic diagram showing a conventional radio wave detection microwave antenna,

2 is a schematic diagram showing an overall configuration of a radio wave monitoring system according to the present invention;

3 is a diagram illustrating a configuration of a detection base station according to the present invention;

4 is a detailed block diagram of the sub-controller shown in FIG. 3;

FIG. 5A is a view of the high gain radio frequency detection low band antenna shown in FIG. 3; FIG.

FIG. 5B illustrates an n-direction arrangement of the low-gain antenna for high-gain wave detection shown in FIG. 3;

FIG. 6A is a diagram illustrating the high-gain antenna for high-frequency detection shown in FIG. 3; FIG.

FIG. 6B illustrates an n-direction configuration example of the high-gain antenna for high-frequency detection shown in FIG. 3;

6C is a layout example of k antennas in each direction of the high-gain antenna for high-frequency detection shown in FIG. 3;

FIG. 7 illustrates an example of each low band dual dipole logarithmic antenna shown in FIG. 5A;

FIG. 8 is a diagram illustrating an example of each high band parabola antenna illustrated in FIG. 6A;

9A is a detailed view showing an example of the radiation horn of the parabolic antenna shown in FIG. 8;

9b shows an example of an omni-directional antenna A _V , A _RV according to the invention,

10 is a block diagram showing the detailed configuration of the radio wave monitoring and control center according to the present invention,

11 is a schematic diagram illustrating a concept of detecting a position of a radio wave source according to the present invention;

12 is a flowchart illustrating a procedure performed by a detection base station according to the present invention;

Figure 13 is a flow chart illustrating a procedure performed in the radio monitoring control center according to the present invention.

* Explanation of symbols for main parts of the drawings

100-1 to 100-3: Detection base station 200: Radio monitoring control center

30: radio wave source (monitoring object) 110-1 ~ 110-6: antenna for detection

110L: low band antenna 110R: high band antenna

LP1-LP3: logarithmic antenna antenna P1-P3: parabolic antenna

S1 ~ Sn: Shielded Network A _RV , A _V : Omnidirectional Broadband Antenna

120-1 to 120-n: Low band selector switch 130-1 to 130-n: Low band receiver

140-1 ~ 140-n: High band selector switch 140'-1 ~ 140'-n: High speed directional selector switch

150-1 to 150-n: high-band receiver

170: subcontroller 410: low-band input unit

420: high-band input 411-1 ~ 411-n: analog to digital converter

412-1 to 412-n: phase detectors 413-1 to 413-n: analog-to-digital converters

430: I / O interface 440: microprocessor

441: memory 442: RTC

443: digital signal processor 450: LCD

460: key input unit 470: GPS receiver

480: communication unit 72: cylindrical reflector (or circular parabolic)

74: copier 210: communication unit

220: main controller 221: key input unit

222: microprocessor 223: RTC

224: memory 225: LCD

226: GPS receiver 230: electronic map display unit

240: recorder

1,1 ': conical insulator 2,2': logarithmic radiation element

3: support structure 4: balun

5,5 ': Feed point

The present invention relates to an antenna for radio wave detection and a radio wave monitoring system using the same. More particularly, a high-gain antenna is installed in various directions for each frequency band to simultaneously receive radio waves arriving from various directions to receive radio waves. The present invention relates to a high-performance antenna for detecting a radio wave radiation point that detects an illegal radio wave or an approved radio wave radiation position by comparing and calculating frequency, time, reception level, and phase, and a radio wave monitoring system using the same.

In general, in order to increase the efficiency of use of the frequency in radio wave communication and to eliminate mutual interference between users, the allocated frequency, output, and the like are permitted by the government.

However, it is often the case that some radio station operators illegally copy radio waves without permission or copy bad radio waves outside of the allowed frequency and size, thus adversely affecting the normal operating communication service. Therefore, in order to block such illegal or bad radio sources, government authorities are operating a radio monitoring system to detect and monitor these unwanted waves.

1A is a schematic diagram showing an example of a conventional radio wave detection antenna used in a radio wave monitoring system, and FIG. 1B is a schematic diagram showing a conventional radio wave detection microwave antenna.

As shown in FIG. 1A, the conventional radio wave detection antenna 10 is configured to monitor a radio wave in a 20Mhz to 3GHz band by installing a wideband dipole antenna in 4 to 5 directions, or as shown in FIG. 1B. One parabola microwave antenna is rotated to detect high frequency illegal radio waves. That is, FIG. 1A illustrates an example in which the single dipole antennas 11 to 13 and the omnidirectional antenna 16 are installed in the supporting rods 14 in four directions to cover three bands, and FIG. 1B illustrates the rotating table 22. An example in which the parabolic antenna 21 located above is rotated to receive a radio signal by the receiver 23 is illustrated.

However, in the current wireless communication society, many operators, such as mobile operators and fixed carriers, provide high-power communication services in a plurality of frequency bands and generate a lot of radio noise and spurious to detect a standard dipole as shown in FIG. 1A. There is a difficult problem. In other words, when a single dipole antenna is constructed in the 4 to 5 directions as in the prior art, the gain is low, the reception sensitivity is reduced, and thus it is impossible to search in an urban residential area where radio wave noise is severe, and the monitoring frequency band is limited to 3 GHz or less. There is a problem that can not detect the ultra-high frequency band of 3GHz or more widely used.

In addition, as shown in FIG. 1B, the method of rotating with one parabola antenna 21 has a problem in that the antenna cannot follow it because the radio wave is momentarily emitted.

In order to solve the above problems, the present invention divides a wide frequency band of 20 MHz to 50 GHz into several bands, and then configures each frequency band as a high-gain broadband antenna in various directions, thereby making it a weak radio wave with high-performance reception field strength. It is an object of the present invention to provide a high-performance antenna for detecting radio wave radiation points that enables search monitoring.

Another object of the present invention is to place two or more detection base stations equipped with the high-performance antenna as described above to compare and calculate the frequency, transmission time, transmission level, phase, etc. of the radio source transmitted from each detection base station to accurately calculate the illegal radio wave radiation position It is to provide a radio wave monitoring system that can be detected.

In order to achieve the above object, the apparatus of the present invention includes: at least three or more detection base stations capable of detecting a radio signal in all directions; and a detection transmitted from each detection base station connected to the detection base station by a wired or wireless communication network. It consists of a central radio monitoring and control center that receives data and prepares a radio wave map of the area, and detects and manages the location and frequency of radio waves that transmit illegal radio waves, radio frequency transmission time and magnitude of transmission power. It is characterized by.

The detection base station may include: detection antennas for receiving a radio signal in an n direction, and a band selection switch for selecting a band from a low band antenna of each of the detection antennas; N lowband receivers for receiving radio signals from the antenna selected by the band selection switch; A band selection switch for selecting a band in the high band antennas of the detection antennas; N highband receivers for receiving radio signals from the selected antenna; And a sub-controller for generating detection data of a radio wave source using the strength and phase information of the signal received from each receiver.

The detection antennas are a low band antenna composed of a logarithmic period dipole antenna for receiving high frequency signals up to 20 MHz and 3 GHz, and parabolic or parafracts for receiving high frequency signals up to 2 GHz and 50 GHz. The low-band antenna is implemented as a dual polarized logarithmic antenna, and includes a first low band antenna and a dual polarized logarithmic antenna for detecting a radio signal in a frequency band of 20 MHz to 120 MHz. Implemented as a second low-band antenna for detecting a radio signal in the 120MHz ~ 500MHz frequency band, and a dual polarized logarithmic antenna is composed of a third low-band antenna for detecting a radio wave signal in the 500MHz to 3000MHz frequency band . The high-band antenna is implemented as a parabolic or para-fracted antenna to detect a radio signal in the 2 GHz to 10 GHz frequency band, and the high-band antenna is implemented as a para-bola or para-flag antenna and a radio signal in the 10 GHz to 20 GHz frequency band A second high-band antenna for detecting the, and a parabola or para-fracted antenna is implemented as a third high-band antenna for detecting a radio signal in the frequency band of 20GHz ~ 50GHz.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram showing the overall configuration of the radio wave monitoring system according to the present invention, Figure 3 is a view showing the configuration of the detection base station according to the present invention, Figure 4 is a detailed configuration block of the sub-controller shown in FIG. It is also.

According to the present invention, a radio wave monitoring system for detecting radio waves by detecting radio waves may include at least three or more detection base stations 100-1 to 100-capable of detecting radio signals in all directions as illustrated in FIG. 2. 3) and wired or wireless communication network with each detection base station 100-1-100-3 to receive detection data transmitted from each detection base station 100-1-100-3 to obtain a radio wave map of a corresponding region. In addition, it is composed of a central radio monitoring and control center 200 for detecting and managing the location and transmission frequency, the radio transmission time, the magnitude of the transmission power, and the like of the radio source 30 for transmitting illegal radio waves. Here, the number of detection base stations 100-1 to 100-3 may be two or more, but in the embodiment of the present invention, three detection base stations are used as an example.

Each of the detection base stations 100-1 to 100-3 includes detection antennas 110-1 to 110-n for receiving a radio signal in the n direction, and each detection antenna ( Band selection switch 120-1 to 120-n for selecting a band in the low band antenna 110L of 110-1 to 110-n, and antenna selected by the band selection switch 120-1 to 120-n. Band for selecting a band in the n low-band receivers 130-1 to 130-n for receiving radio signals from the high-band antennas 110H of the detection antennas 110-1 to 110-n. Selection switches 140-1 to 140-n, n high-band receivers 150-1 to 150-n for receiving radio signals from selected antennas, and omni-directional antennas installed together with low-band antennas 110L (A). _V ), omni-directional receiver 180-1, omni-directional antenna (A _RV ) installed with high-band antenna 110H, omni-directional receiver 180-2, and each receiver 130-1 to 130-n, 150 -1 to 150-n) strength and top of the received signal It consists of a sub-controller 170 for generating detection data for the radio wave source using the phase information. In this case, since the high-band antenna 110H uses a parabola antenna, the beam width is narrow, so that the n main directions antennas are implemented as k sub-directional antennas, and the k sub-directional antennas are high-speed direction selection switches 140'-1. ~ 140'-n) can be configured to switch.

The detection antennas 110-1 to 110-n are 'low band antennas' 110L composed of logarithmic period dipole antennas for receiving high frequency signals of 20 MHz to 2 (3) GHz, and 2 GHz. It consists of a 'high band antenna' (110H) consisting of a parabolic or paraflective antenna to receive a high-frequency signal up to ~ 50GHz. In this case, each antenna may be configured as a single polarized, double polarized or circular polarized antenna. In some cases, where the radio noise is low, the direction detection may be performed in comparison with the directional antenna based on the omnidirectional broadband antenna (vertical or horizontal polarization) (A _V , A _RV ).

The low band antenna 110L is implemented as a dual polarized logarithmic antenna, and is configured as a first low band antenna LP1 for detecting a radio signal in the 20 MHz to 120 MHz frequency band, and a dual polarized logarithmic antenna to be 120 MHz to 500 MHz. A second low band antenna LP2 for detecting a radio signal in a frequency band and a third low band antenna LP3 for detecting a radio signal in a 500 MHz to 3000 MHz frequency band are implemented as a dual polarized logarithmic antenna. It is composed.

The high band antenna 110H is implemented as a parabola or parafracted antenna and is a first high band antenna P1 for detecting a radio signal in a frequency band of 2 GHz to 10 GHz, and is implemented as a parabola or parafracted antenna and is 10 GHz to 20 GHz. Implemented as a second high band antenna P2 for detecting a radio wave signal in a frequency band, a parabolic or para-fragment antenna, and configured as a third high band antenna P3 for detecting a radio wave signal in a 20 GHz to 50 GHz frequency band. .

The signal received in each direction of the low band antenna 110L is amplified by the first to nth direction low band receivers 130-1 to 130-n, and one low band receiver is used for each direction. For this purpose, band selection switches 120-1 to 120-n for selecting a band are used.

In addition, a signal received in each direction of the high band antenna 110H is amplified by the first to n-th direction high band receivers 150-1 to 150-n, using one high band receiver for each direction, To this end, band selection switches 140-1 to 140-n are used to select bands. Here, the band selection switches 120-1 to 120-6 and 140-1 to 140-6 may be automatically switched under the control of the sub controller 170 or manually by an operator's operation.

Referring back to FIG. 3, the sub-controller 170 first controls each band selection switch 120-1 to 120-n and 140-1 to 140-n to select a frequency band to be monitored. Select the antenna output. The output signal of the low band antenna selected by the low band selection switches 120-1 to 120-n is amplified and demodulated by the low band receivers 130-1 to 130-n in the corresponding direction and transmitted to the sub-controller 170. The output signal of the high band antenna selected by the direction selection switches 140'-1 to 140'-n and the high band selection switches 140-1 to 140-n is a high band receiver 150-1 in the corresponding direction. 150-n) is amplified and demodulated and transmitted to the sub-controller 170.

As shown in FIG. 4, the sub controller 170 includes a low band input unit 410, a high band input unit 420, an input / output interface 430, a microcontrol unit 440, a memory 441, and an RTC 442. ), A digital signal processor (DSP) 443, an LCD 450, a key input unit 460, a GPS receiver 470, and a communication unit 480. The low band input unit 410 and the high band input unit 420 are adjacent to an analog to digital converter (A / D: 411-1 to 411-n) for converting an analog signal received from a receiver in each direction into digital. Phase detectors 412-1 to 412-n for detecting phases from received signals received from the antenna, and analog-to-digital converters for converting analog phase detection signals to digital (A / D: 413-1 to 413-n). )

Referring to FIG. 4, the analog-to-digital converter 411-1 converts the analog signal strength received from the first direction low-band receiver 130-1 into digital, and the analog-to-digital converter 411-2 converts into the second direction. The analog signal strength received from the low band receiver 130-2 is converted into digital, and the analog to digital converter 411-3 converts the analog signal strength received from the third direction low band receiver 130-3 into digital. do. Proceeding in the same manner, the analog-to-digital converter 411-n converts the analog signal strength received from the n-th direction low band receiver 130-n to digital.

The phase detector 412-1 detects a phase from a received signal transmitted from the first directional low band receiver 130-1 and a received signal transmitted from the second directional receiver 130-2, and in some cases, omni-directional. Phase comparison is also detected with the antennas A _V and A _RV . The analog-to-digital converter 413-1 converts the analog signal of the phase detector 412-1 to digital. In the same manner, the phase detector 412-n detects a phase from a received signal transmitted from the n-th direction low band receiver 130-n and a received signal transmitted from the first direction receiver 130-1. The analog to digital converter 413-n converts the analog signal of the phase detector 412-n into digital. All digitally converted data as described above is transferred to the microcontrol unit 440 through the input / output interface 430.

As described below, the microcontrol unit (MCU) 440 converts a received signal with a Fast Fourier transform (FFT) together with a digital signal processor (DSP) 443, and processes the received signal according to a predetermined detection algorithm. After calculating the frequency, phase, signal strength and the like and transmits to the radio wave monitoring and control center 200 through the communication unit 480. The memory 441 and the real time clock (RTC) 442 are peripheral elements used with conventional processors, and provide real-time information and storage space, and the communication unit 480 is wired or wireless according to a predetermined communication protocol. The data detected through the network is transmitted to the radio monitoring center (200).

5A and 5B are diagrams illustrating a 'low band antenna' for radio wave detection of high gain shown in FIG. 3, and FIGS. 6A to 6C are diagrams of a 'high band antenna' for high gain radio wave detection shown in FIG. The figure is shown. Although not shown in the drawing, the low band antenna and the high band antenna may be installed in the same steel tower or support rod in series or side by side in parallel, and are configured to cover the insulation cover to protect each antenna element from snow, rain or fallout. You may. In addition, in order to reduce interference of adjacent antennas in the other direction, a metal shielding network (plate) S1 to Sn between antennas may be attached.

In addition, each low-band antenna (110L) is based on the center of the antenna installation, such as a tower or pillar 112, n is arranged on the concentric circles at equal intervals as shown in Figure 5b can receive radio waves arriving in the n direction Each of the high band antennas 110H is arranged at equal intervals on the concentric circles to receive radio waves reaching in the n direction, as shown in FIG. 6B with respect to the center of the antenna installation such as the pylon or the pillar 112. Can be.

In the embodiment of the present invention, as shown in FIG. 5A, the low band antenna 110L includes a first low band antenna LP1 having a frequency band of 30 MHz to 120 MHz and a 120 MHz to 500 MHz frequency as a dual polarized logarithmic antenna. A second low band antenna LP2 of the band, and a third low band antenna LP3 of the 500 MHz to 3000 MHz frequency band. In addition, the metal shielding network (plate) (S1 ~ Sn) is installed between each antenna may be isolated from each other.

The first low band antenna LP1 includes first low band antennas LP1-1 to LP1-n in the first to nth directions in which n dual dipole logarithmic antennas are arranged at a predetermined interval on a concentric circle. The second low band antenna LP2 includes second low band antennas LP2- 1 to LP2-n in the first to n-th directions in which n dual dipole algebraic antennas are arranged at regular intervals on a concentric circle. The third low band antenna LP3 is a third low band antenna LP4-1 to LP3-n in the first to nth directions in which six dual dipole logarithmic antennas are arranged at a predetermined interval on the concentric circle. Is done.

In addition, in the embodiment of the present invention, as shown in FIG. 6A, the high band antenna 110H includes a first high band antenna P1 having a frequency band of 2 GHz to 10 GHz and a 10 GHz to 20 GHz frequency band implemented by a parabola or para-fracted antenna. A second high band antenna P2 in the frequency band, and a third high band antenna P3 in the 20 GHz to 50 GHz frequency band.

 The first high band antenna P1 is a first high band antenna P1-1 to P1-n in a first direction to an nth direction in which n parabolic or parafrack antennas are arranged at a predetermined interval on a concentric circle. The second high band antenna P2 includes a second high band antenna P2-1 to P2- in a first direction to an nth direction in which n parabolic or parafracted antennas are arranged at a predetermined interval on the concentric circle. n), and the third high band antenna LP3 is a third high band antenna P3-1 in the first to nth directions in which n parabolic or paraflective antennas are arranged at regular intervals on a concentric circle. P3-n).

FIG. 6C shows an example in which k antennas are arranged in each (1 to n) directions of a high-gain antenna for high-frequency detection.

Parabolic antennas in the high band of 2GHz or higher have a narrow beam width, and dozens of antennas need to be installed. Therefore, after dividing the K by each direction group of the parabolic antenna, the automatic high speed switch (140'-1 ~ 140'-n) is attached to reduce the number of receivers, and by adding n more switches, the entire receiver can be simultaneously received ( Actually dozens, hundreds of second intervals receive) Auxiliary switch can be attached.

Referring to FIG. 6C, in the case of a high band antenna, a plurality of directional antennas P1-1-1 to P1-1-k, P1-2-1 to P1-2-k, ... P1-n-1 to P1-nk; P2-1-1 ~ P2-1-k, P2-2-1 ~ P2-2-k, ... P2-n-1 ~ P2-nk; P3-1-1 ~ P3-1 -k, P3-2-1 ~ P3-2-k, ... P3-n-1 ~ P3-nk, then high speed direction selector switch (SW1 ~ SWn; 140'1) to select antenna ˜140'-n, band selection switches 140-1 to 140-b, and a small number of receivers RX1 to RXn 150-1 to 150-n can be received in all directions.

That is, P1-1-1 to P1-1-k antennas are switched at a high speed with the first switch (SW1; 140'-1) and then received by the first receiver (RX1) 150-1, and then P1-2. -1 to P1-2-k antennas are switched at high speed by the second switch (SW2; 140'-2) and then received by the second receiver (RX2; 150-2), and P1-3-1 to P1- The 3-k antenna is switched at a high speed with the third switch (SW3; 140'-3) and then received by the third receiver (RX3; 150-3), and the P1-n-1 to P1-nk antennas are After switching at high speed with the n switch (SWn) 140'-n, the signal is received by the n-th receiver (RXn) 150-n. In this way, by installing dozens of microwave antennas so that beams in all directions overlap, the direction selection switches 140'-1 to 140'-n are switched at high speed to simultaneously receive the signals within a short time. The directions and positions can be calculated in the same way as in the VHF and UHF bands shown.

In the exemplary embodiment of the present invention, an example of using a para-fractal antenna rather than a parabolic is illustrated and described, but the same may be applied to the parabolic antenna.

FIG. 7 is a diagram illustrating an example of each of the low-frequency dual dipole logarithmic antennas shown in FIG. 5A, wherein (a) is a perspective view, (b) is a side view, and (c) is a rear view.

In the low band antenna 110L according to the present invention, the low band antennas in each direction of the same band are all the same, and even when the frequency bands are different, the dual dipole logarithmic antennas having the same structure are used. Depending on the frequency band used, the dipole size and placement intervals are different. As described above, since the difference configuration according to the use frequency band can be easily implemented at a level of ordinary skill in the art, only one dual dipole logarithmic periodic antenna will be described as an example as shown in FIG. 7.

Referring to FIG. 7, the dual dipole logarithmic antenna has m copiers arranged on a horizontal support bar at regular intervals. In an embodiment of the present invention, six copiers are arranged on a horizontal support bar, and each copier has a vertical half. The wavelength dipole and the horizontal half-wave dipole are orthogonal. The power sensed by the horizontal dipole is output through the horizontal feed terminal CH, and the power sensed by the vertical dipole is output through the vertical feed terminal CV. In some cases, the phase feeder (Ph) is connected to the vertical feed terminal (CV) to adjust the phase by ± 90 °, and then the output of the horizontal feed terminal and the vertical feed terminal can receive left turn polarization and right turn polarization through the integrated terminal (Cc). It may be.

FIG. 8 is a diagram illustrating an example of each of the high band para-frag antennas shown in FIG. 6A, wherein (a) is a perspective view, (b) is a side view, (c) is a plan view, and (d) is a front view to be. FIG. 9A is a diagram showing an example of a radiation horn of the para-fractal antenna shown in FIG. 8, (a) is a copier for receiving a right-turning polarization, and (b) is a copier for receiving a left-turning polarization. ) Is a plan view.

In the high-band antenna 110H according to the present invention, the high-band antennas in each direction of the same band are all the same, and even when the frequency bands are different, the para-flac antennas having the same structure are used. Only the size of the antenna differs depending on the frequency band. As such, the configuration of the difference according to the frequency band used can be easily implemented at the level of those skilled in the art. As shown in FIG. 8, only one para-fract antenna will be described as an example.

Referring to FIG. 8, the para-fracted antenna used in the present invention is composed of a cylindrical reflector 72 and a radiation horn 74 supported through a support rod on the front of the reflector 72. The rear of the fastener 76 and the connector (C) for fixing the reflecting plate 72 is provided.

The radiation horn 74 has a wideband right turn polarized copying machine 74R as shown in (a) of FIG. 9A and a wideband left turn polarizing copying machine 74L as shown in (b) of FIG. 9A, and a right turn polarization. The + line and the-line are spirally rotated to the right of the copying machine 74R, and the + line and-line are spirally rotated to the left of the left rotating polarizing copying machine 74L. Such a copying machine 74 is provided with a radiation horn 74 at the front of the copying machine H, as shown in FIG. 9A (C). In the case of ultra-wide bands, this spiral copier may be spaced apart as logarithmic spirals. The helix may be composed of circular or hexagonal shapes (four, six, eight).

Figure 9b shows an example of the omni-directional antenna ( _AV , A _RV ) according to the present invention, (a) is a side view, (b) is a plan view, (c) is a horizontal radiation pattern diagram, (d) is Vertical copy pattern diagram.

Referring to FIG. 9B, the omni-directional antennas A _V and A _RV of the present invention have two pairs of logarithmic helical copiers 2 and 2 'in nautical shape outside the two pairs of conical insulators 1 and 1'. 2 pairs of feed points 5, 5 'are output to the feed connector 6 through the inside of the support structure pipe 3 after synthesis | combination in the balun 4. In some cases, the high gain omni-directional broadband antenna is installed in high altitude where the beam can be tilted with the size of the two pairs of radiant horns and the diameter being differential. .

10 is a block diagram showing the configuration of a radio wave monitoring control center according to the present invention, the control center 200 is connected to each detection base station (100-1 ~ 100-3) to receive detection data of each detection base station Analyze the communication unit 210 and the received detection data to calculate the exact position of the radio source, calculate the transmission frequency of the radio source, the magnitude of the transmission signal, etc. and display it on the electronic map display unit 230 as an electronic map. Or a main controller 220 for controlling recording to the recorder 240, an electronic guidance unit 230, and a recorder 240.

Referring to FIG. 10, the main controller 220 displays a key input unit 231 for an operator to operate, a microcontrol unit (MCU) 232 that processes a whole function by executing a predetermined radio wave monitoring application program, and time information. A real time clock (RTC) 233, a memory 234 for storing data or software, an LCD 235 for displaying an operation state, and a GPS receiver 235 for receiving a GPS signal.

11 is a schematic diagram illustrating a concept of detecting the position of a radio wave source according to the present invention.

Referring to FIG. 11, the radio wave detection region 1DR detectable through the first directional low band antenna LP1-1 is elliptical like a rugby rod and is detected through the second directional low band antenna LP1-2. The radio wave detection area 2DR which can be made is also elliptical like a rugby rod, and the two detection areas 1DR and 2DR have a phase difference θ. The distance in the center direction # 1 is the longest in the first direction detection region 1DR, and the distance in the center direction # 2 is the longest in the second direction detection region 2DR. The subdivision is further divided from the central position # 1 in the first direction to the second direction # 2 side to be divided into # 1-1 to # 1-n, and the first from the central position # 2 in the second direction. The direction (# 1) side is further subdivided and divided into # 2 + 1-# 2 + n.

The signal detected by the first directional low band antenna LP1-1 is amplified by the first directional low band receiver 130-1 and then converted into digital signals to the sub-controller 170. The signal detected by the LP1-2 is amplified by the second directional low band receiver 130-2, and then digitally converted and transmitted to the sub-controller 170, and is transmitted by the phase detector to the first directional low band receiver 130. The analog phase signal detected from the signal of -1) and the output of the second directional low band receiver 130-2 is converted to digital and then transmitted to the sub controller 170.

Accordingly, the sub-controller 170 can calculate the position and frequency of the detected radio source from the magnitude of the electric field and the phase difference of the corresponding direction detected by each antenna, and transmit the radio wave in combination with the internal real-time information. The time, the magnitude of the outgoing signal, and the like can be calculated.

In some cases, in the low-noise region, the omnidirectional antenna (A _V , A _RV ) receiving signal is received by the omnidirectional receiver 180-1, and then the phase difference detector is input, and then the phase difference is transmitted to the sub-controller 170. You can detect the direction.

As such, the relative magnitudes and phase differences of the electric field strengths detected by the antennas according to the direction of propagation are summarized in Table 1 below.

Radio wave Field strength of the first direction antenna  Field strength of the second directional antenna  Phase difference #One 9 One  θ # 1-1 8 2  θ-1 # 1-2 7 3  θ-2 . . . . . . . . # 1-n (# 2 + n) 5 5  θ-n . . . . . . # 2 + 2 3 7  θ + 2 # 2 + 1 2 8  θ + 1 #2 One 9  θ

On the other hand, in the case of a parabolic / parafracted antenna having a narrow beam width, radio waves are detected as shown in FIG. 6C.

12 is a flowchart illustrating a procedure performed by a detection base station according to the present invention, and FIG. 13 is a flowchart illustrating a procedure performed by a radio monitoring control center according to the present invention.

Referring to FIG. 12, when the detection period of the sub-controller 170 of each detection base station, the band selection switch (120-1 ~ 120-n, 140-1 ~ 140-n) and direction selection switch 140 for each direction '-1 to 140'-n) is selected to select a band to be detected (S101 and S102). When the band to be detected is selected, the receivers 130-1 to 130-n and 150-1 to 150-n for each direction receive and process radio signals from the selected antenna and output the processed signals to the sub controller 170 (S103). .

The sub-controller 170 processes signals received from the receivers 130-1 to 130-n and 150-1 to 150-n for each direction to calculate a phase difference between adjacent antennas and fast forwards all received signals. By transforming (FFT), information in the time domain is analyzed and processed in the frequency domain to form detection data of a radio wave source in the corresponding frequency band (S104 to S107). When the above process is completed in one frequency band, it is determined whether the detection is completed in all frequency bands. If the detection is not completed, the process is repeated for the next frequency band. When the detection is completed, the signal data detected by the corresponding base station is detected. Packetized according to a predetermined communication protocol and transmitted to the control center 200 through the communication unit (S108, S109).

As shown in FIG. 13, the radio monitoring control center 200 receives detection data from each detection base station 100-1 to 100-3 and analyzes the location and frequency of the detected radio source, transmission size, and transmission. The time and the like are calculated and stored (S201 to S203).

Subsequently, it is determined whether the detected radio sources are authorized radio sources and transmit radio waves within the permitted range, thereby determining whether the radio sources are illegal and defective, and displaying them on a radio map of the region (S204, S205). In order to leave the detected record as evidence, the detection information is recorded using the recorder 240 (S206).

As described above, according to the present invention, after distributing at least two or more detection base stations having high gain broadband antennas installed in various directions, radio signals in each direction are received through the antennas to monitor radio sources in the corresponding area. In particular, it is possible to control the illegal use of radio waves by accurately detecting and recording the location and frequency of the illegal radio wave source, the size of the transmission signal, the transmission time, and the like.

In addition, the antenna according to the present invention can monitor a wide range of frequency bands ranging from 20MHz to 50GHz, and by using a high-gain antenna, radio waves can be detected with high sensitivity even in urban areas where radio waves are poor due to noise or spurious. Can be.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand that you can.

Claims (14)

At least three detection base stations capable of detecting radio signals in all directions; and Connected to the detection base station through a wired or wireless communication network, receives detection data transmitted from each detection base station, prepares a radio wave map of the corresponding area, and transmits a location, a transmission frequency, a radio wave transmission time, and a transmission source of an illegal radio wave. A radio wave monitoring system using a high-performance antenna for radio wave detection, comprising a central radio wave monitoring control center that detects and manages the magnitude of electric power. The method of claim 1, wherein the detection base station is detection antennas for receiving a radio signal in an n direction, A band selection switch for selecting a band in the low band antennas of the detection antennas; N lowband receivers for receiving radio signals from the antenna selected by the band selection switch; A band selection switch for selecting a band in the high band antennas of the detection antennas; N highband receivers for receiving radio signals from the selected antenna; And And a sub-controller for generating detection data for a radio wave source using the strength and phase information of the signal received from each receiver. The method of claim 2, wherein the sub-controller An analog to digital converter for converting an analog signal received from a receiver in each direction to digital, a phase detector for detecting a phase from a received signal received from an adjacent antenna, and analog to digital for converting an analog phase detection signal to digital An input unit consisting of a transducer; A microprocessor for converting a received signal with a digital signal processor to perform Fast Fourier transform (FFT) and processing the signal according to a predetermined detection algorithm to calculate a frequency, phase, signal strength, etc. of the detected radio wave source; And A radio wave monitoring system using a high-performance antenna for radio wave detection, characterized in that the communication unit for transmitting the data detected through a wired or wireless network according to a predetermined communication protocol to the radio wave monitoring control center. The method of claim 1, wherein the detection antennas A low band antenna composed of a logarithmic period dipole antenna for high frequency reception of a frequency signal from 20 MHz to 2 In order to receive the frequency signal from 2GHz to 50GHz with high gain, it consists of a high-band antenna consisting of a parabolic or para-fracted antenna, and each antenna may be configured as a single polarized, double polarized or circular polarized antenna Radio monitoring system using high performance antenna for radio wave detection. The antenna of claim 4, wherein the low band antenna is Implemented as a dual polarized logarithmic antenna to detect a radio signal in the 20 MHz to 120 MHz frequency band and a first low band high gain antenna and a dual polarized logarithmic antenna to detect a radio signal in the 120 MHz to 500 MHz frequency band A high performance antenna for wave detection comprising a second low band high gain antenna and a third low band high gain antenna for detecting a radio signal in a frequency band of 500 MHz to 3000 MHz, implemented as a dual polarized logarithmic antenna. Radio monitoring system using the. The antenna of claim 4, wherein the high band antenna is Implemented as a parabola or parafracted antenna to detect radio signals in the 2 GHz to 10 GHz frequency band, and detecting a radio signal in the 10 GHz to 20 GHz frequency band implemented as a parabola or parafract antenna And a third high band high gain antenna implemented as a second high band high gain antenna and a parabola or para-fracted antenna for detecting a radio signal in a frequency band of 20 GHz to 50 GHz. Radio monitoring system used. 7. The antenna of claim 5 or 6, wherein each antenna is Radio frequency monitoring system using a high-performance antenna for radio wave detection, characterized in that the facility is configured to change the frequency bandwidth, band range, the number of antennas in accordance with the antenna gain and the low-band, high-band, up and down frequency range changes. According to claim 1, wherein the control center A communication unit connected to each detection base station to receive detection data of each detection base station; It is provided with a main controller that analyzes the received detection data to calculate the exact position of the radio wave source, calculates the frequency of transmission of the radio wave source, the magnitude of the signal, etc. and displays it on the electronic map display as an electronic map or records it in the recorder. Radio monitoring system using a high-performance antenna for radio wave detection, characterized in that. The method of claim 8, wherein the main controller Key input unit for the operator to operate, a microcontrol unit that executes a predetermined radio wave monitoring application program to handle all functions, a real time clock that provides time information, a memory for storing data or software, and an operating state Radio monitoring system using a high-performance antenna for radio wave detection, characterized in that it has an LCD for displaying the display, and a GPS receiver for receiving a GPS signal. delete delete delete delete delete

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