KR20040089267A - A 3d antenna for radar system - Google Patents

Abstract

PURPOSE: A three-dimensional antenna is provided to detect and track a target by varying the direction of vertical beam through the use of a reversible phase shifter and varying the direction of horizontal beam through the rotation of the antenna. CONSTITUTION: A three-dimensional antenna comprises a radar antenna and a friend and foe discrimination antenna. The radar antenna includes a wide band power distributor(110) for distributing the high frequency signal applied from a rotary joint(5); phase shifters(120-1 to 120-n) for varying phases of the high frequency signal distributed from the wide band power distributor in accordance with a phase control signal; a direction converting connecting unit for converting directions of the signals output from the phase shifters; a radiation element array in which radiator elements are connected in a horizontal direction, wherein the radiation element array radiates, in the air, the high frequency signal transmitted from the direction converting connecting unit; and a phase controller(140) for controlling the phase shifters.

Description

3D antenna for target detection {A 3D ANTENNA FOR RADAR SYSTEM}

The present invention relates to an antenna for detecting a target, and more particularly, to a three-dimensional antenna for detecting a target that can detect position information in the horizontal and vertical directions of the target using a reversible phase shifter.

In general, a radar system is a wireless monitoring system that detects the existence and distance (direction) of the target by using the reflected wave reflected from the object after firing the radio waves, conventionally by firing the beam by the mechanical rotation and the horizontal direction and distance The altitude of the target was measured by using a perpendicular radar separately. The three-dimensional radar developed to solve the inconvenience of using two antennas has been able to detect the target with one antenna by processing the mechanical motion of the neck of the conventional right-angle radar by the operation of an electric beam. .

However, since the conventional antenna used in such a three-dimensional radar system forms a pencil-beam using an irreversible phase shifter as a phase shifter, it is possible to search in the horizontal direction, but in a vertical direction (ie, elevation angle). It was difficult to accurately search and the required parts increased. In other words, the pencil-beam has a form in which a radiation pattern is composed of a single main beam having a narrow half-power beam width and a relatively low level side lobe. The irreversible phase shifter is used to control the beam in the vertical direction. If used, at least two phase shifters are required.

Accordingly, the present invention has been made to solve the above-described problems, by using a reversible phase shifter to change the elevation angle of the vertical beam, and by rotating the antenna itself in the horizontal direction to change the direction of the horizontal beam It is an object of the present invention to provide a three-dimensional antenna for target detection, which is capable of detecting and tracking a directional target.

It is another object of the present invention to provide a three-dimensional antenna for target detection having a wideband power bubble that can form a pencil-beam.

In addition, another object of the present invention is to provide a three-dimensional antenna for detecting a target to be able to identify a friend and foe by installing a pia identification antenna on the top or rear of the above-described target search antenna.

1 is a schematic diagram showing the configuration of a general radar system,

2a is a front view of an antenna according to the present invention;

2b is a rear view of the antenna according to the present invention;

2c is a plan view of an antenna according to the present invention;

3 is a block diagram of an antenna according to the present invention;

4A is an external view of the broadband power divider shown in FIG. 3;

4B is a cross-sectional view of the broadband power divider shown in FIG. 3;

4C is a partial cross-sectional view of the broadband power divider shown in FIG. 4B;

4d is another example of the broadband power divider shown in FIG.

5 is an example of the reversible phase shifter shown in FIG.

6 is a configuration diagram of an antenna for identifying a pia according to the present invention;

7 illustrates an example of an antenna radiation pattern according to the present invention.

* Explanation of symbols for main parts of the drawings

100: blind search main antenna 110: broadband power splitter

120: phase shifter 130: radiation element

140: phase controller 150: U-link

The present invention for achieving the above object is an antenna consisting of a target detection antenna for detecting a target, and a pia identification antenna for identifying a pia, wherein the target detection antenna is drawn from the rotary joint A broadband power distributor for distributing high frequency signals; A phase shifter for varying a phase of a high frequency signal distributed from the broadband power divider according to a phase control signal; A direction change connector for changing a direction of an output signal of the phase shifter; A radiating element array in which horizontally connected radiating elements are arranged vertically and radiating high frequency signals transmitted from the redirection connection parts into the air; And a phase controller for controlling the phase shifter, wherein the phase shifter matches an impedance to efficiently transmit an input / output signal; A first polarizer for converting an input signal from a linearly polarized wave to a circularly polarized wave at the time of transmission and converting the circularly polarized wave to a linearly polarized wave at reception; A driving circuit outputting a driving current for shifting a phase of the high frequency signal according to the control of the phase controller; A phase shift unit for shifting a phase of the high frequency signal according to the driving current; A second polarizer for converting an input signal from a circularly polarized wave to a linearly polarized wave at the time of transmission and converting the linearly polarized wave to a circularly polarized wave at the time of reception; And a second impedance matching unit matching an impedance to efficiently transmit the input / output signal.

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

1 is a schematic diagram of a general radar system to which the antenna of the present invention may be applied.

As shown in FIG. 1, a general radar system to which the present invention can be applied is supported by a lower support 6 on a support structure 7 and connected to the rotary joint 5 by a three-dimensional antenna for detecting a target 1. ), A transceiver 8 for transmitting and receiving a high frequency radio signal through the three-dimensional antenna 1, and a control and monitor 9 for analyzing the received signal and monitoring the target. Usually, the transmitter / receiver 8 and the control monitor 9 are located in a control room or the like so that an operator can operate the antenna 10, and the antenna 10 is located outside the payload.

In addition, the three-dimensional antenna 1 for detecting a target is composed of a main antenna 3 for detecting a target and a pia identification antenna 2 installed on the main antenna 3. In this case, although not shown in detail in the drawings, a reflector may be added as needed, a support plate for supporting the antenna array may be installed, and a snow cover (4 in FIG. 2A) to protect the entire antenna from rain or snowstorm It is installed. The antenna 1 detects a target and accurately identifies a target by analyzing the reflected signal received from the target after radio wave copying the high frequency radio signal transmitted from the operator's transmitter / receiver 8 toward the target. Provides the ability to

2A, 2B, and 2C are front, rear, and plan views of the antenna according to the present invention, and FIG. 3 is a block diagram of a three-dimensional antenna for target searching according to the present invention.

2 and 3, the rotary joint 5 located below the antenna 10 according to the present invention is connected to a fixed lower support 6 so that the antenna 10 rotates 360 ° in left and right directions. It allows you to send and receive signals smoothly.

In front of the antenna 10, the radiation elements (130-1 ~ 130-n) of the main antenna 100 for the target search is configured in a horizontal, vertical array to form a two-dimensional plane, in the embodiment of the present invention A plurality of slotted waveguides are arranged vertically. In addition, the radiating elements 210-1 to 210-n and 210'-1 to 210 of the PIA identification antenna 200 having a different frequency band from the target searching main antenna 100 on the upper part of the target searching main antenna 100. '-n' are arranged horizontally, and the omni-directional antenna 220 is positioned above.

Meanwhile, as illustrated in FIG. 2B, the rear surface of the antenna 10 is connected to a horizontal array radiating element group 130-1 to 130-n of the target search antenna 100 to change the direction toward the rear surface. The female direction change connection part (referred to as U-link; 150-1 to 150-n), a reversible phase shifter 120-1 to 120-n, a power divider 110, and a phase controller 140 are respectively installed. have.

Hereinafter, the respective components will be described in detail by dividing the target search main antenna and the PIA identification antenna so that the present invention can be easily understood.

1.Main antenna for target search

The main antenna 100 for target searching according to the present invention includes a broadband power divider 110 for forming a pencil-beam, a phase controller 140 and a phase shifter for varying the elevation angle of the vertical beam. 120-1 to 120-n, U-links 150-1 to 150-n, and horizontal array radiating element groups 130-1 to 130-n arranged vertically on the front surface of the horizontal beam. In order to change the direction, the entire antenna 10 of the present invention is configured to rotate 360 ° continuously in the horizontal direction. That is, the array radiation element groups 130-1 to 130-n horizontally arranged on the front surface of the antenna 10 are vertically arranged, and are connected to one end of the radiation element groups 130-1 to 130-n described above. The reversible phase shifters 120-1 to 120-n, the broadband power divider 110, and the phase controller 140 are located at the rear of the antenna by the U-links 150-1 to 150-n that change directions. do.

4A is an outline view of a broadband power divider according to the present invention, FIG. 4B is a cross-sectional view of the present invention, and FIG. 4C is a cross-sectional view of each part of the present invention. The horn structure shown in Figs. 4A to 4C extends the E plane (electric plane).

4A to 4C, the broadband power divider 110 is a sector horn 112 that forms an outer housing of a horn structure, and is installed in a predetermined space inside the sector horn 112 to distribute power. More diaphragms 114. The diaphragm 114 includes an input part 114-2 disposed at a predetermined position inside the sector horn 112, a guide part 114-4 formed along the shape of the sector horn 112, and a sector horn 112. It consists of the output part 114-5 arrange | positioned toward an opening surface.

The input unit 114-2 includes a peak unit 114-1 through which power is introduced, and a converter unit 114-3 in which a thickness increases from the peak unit at a predetermined ratio along the sector horn. The apex 114-1 and the converter 114-3 of the diaphragm are arranged in a symmetrical parallel structure on a concentric circle of a predetermined radius around the length of the sector horn 112. The sector horn 112 is an electric plane horn, and the diaphragm 114 is spherical, suggesting as a preferred embodiment.

The pickup horn 116 is formed by the diaphragm 120 and the sector horn 110 or the diaphragm and another diaphragm, and adjusts the electric plane inlet size of the pickup horn 116 to a predetermined ratio. To distribute. The pickup horn 116 has a broadband characteristic using traveling wave mode, and there is no change in beam direction with frequency.

In the present invention configured as described above, the process of power distribution while incident power passes through the pickup horn will be described in detail as follows. In the following description, the power is used in the TE ₁₀ mode of the basic mode, the sector horn 110 uses an electric plane horn, the diaphragm 114 is described as an embodiment Let's do it. 4B and 4C are sectional views taken on the basis of the temporary line shown in FIG. 4A.

4B and 4C, the power of the TE ₁₀ mode incident to the rectangular waveguide portion (AA cross section) of the broadband power divider 110 is changed to the cylindrical TE ₁₀ mode while passing through the waveguide converting portion (BB cross section). It passes through the horn area (CC section). The horn area is an area for implementing the required number of channels, and arranges the diaphragm 114 corresponding to the number of channels necessary for the end portion DD of this area. The thickness is increased at a constant rate along the sector horn 112 from the peak portion 114-1 and the peak portion 114-1 of the diaphragm into which electric power flows from the input portion 114-2 of the diaphragm. The converters 114-3 are arranged in a symmetrical parallel structure on concentric circles of a predetermined radius with the length of the sector horn 112 as an axis. Accordingly, the power divided by each of the peaks 114-1 is converted into the TE ₁₀ mode through the conversion section (EE section), and reaches the output section (FF section) through the guide section 114-4. do. Since the power divider basically consists of a waveguide structure, the unique characteristics of the waveguide are maintained.

The pickup horn 116 is formed by the diaphragm 114 and the sector horn 112 or the diaphragm and another diaphragm. The process of distributing power in the pickup horn will be described in detail as follows. 4a and 4c, a denotes the waveguide H plane size, which determines the cutoff frequency of the waveguide. In the present invention, since there is no change in the size of the H plane (magnetic plane), there is no change in the cutoff frequency, and basically it can be used at the frequency of the entire band accommodated by the waveguide. b denotes the size of the waveguide E plane, and the size of b does not affect the propagation characteristics since it is independent of the waveguide cutoff frequency. That is, the size of the E plane (electric plane) can be increased or reduced as necessary, or divided into the required number. In addition, since the electric field distribution is uniform in the E plane direction, the electric power distribution is uniform. The arrow shown in FIG. 4C indicates that the electric field in the E plane direction is constant.

Therefore, when power is divided into several parts, the power distributed is proportional to the inlet size (or opening size) of the electric plane of each pickup horn 130. That is, since power is distributed at the ratio of each pickup horn opening size to the total opening size of the sector horn, the variable for determining the power distribution is independent of frequency. As described above, the present invention uses a traveling wave mode, and basically has a broadband characteristic because the electromagnetic field distribution maintains the shape of the TE ₁₀ mode regardless of frequency. And, because all power passes through the closed waveguide structure, losses are minimized. In addition, there is no change in the antenna beam direction according to the frequency because a structurally symmetrical parallel structure is used.

4D is another example of the broadband power divider shown in FIG. 3.

In the broadband power divider having the structure as shown in FIG. 4A, the length of the path from the input terminal to the output terminal is relatively short in the center portion and becomes longer toward the outer shell so that a phase difference is generated accordingly, and the phase shift should be corrected in the phase shifter.

However, as shown in FIG. 4D, when the lengths of all the paths are the same, the phases are the same and there is no need for correction. Referring to FIG. 4D, the lengths of the physical paths r1, r2, ..., r8 from the outer shell to the center become serpentine (i.e., bend) toward the center to have the same length as a whole. The propagation path could be in phase.

On the other hand, in the reversible phase shifter 120-1 for varying the beam in an elevation direction, as shown in FIG. 5, dielectric rods 35a and 35b are bonded to both sides of the ferrite rod 31 to form one bonding rod. After being formed in the structure, the silver-plated bonding rod is positioned at the center to connect the waveguide 36a on the distribution / compositor 10 side and the waveguide 36b on the copier side, and the dielectric rods 35a and 35b at both ends of the bonding rod are formed. Is coupled to each of the waveguides 36a and 36b to form impedance matchers 22a and 22b. In addition, a set coil 32s and a rest coil 32r are wound around the center ferrite rod 31 of the joining rod, and are surrounded by the perike yoke 33 to form a phase shift portion 24. Between the phase shifter 24 and the left and right impedance matchers 22a and 22b, magnets 34a and 34b surrounding the joining rod are positioned, respectively, so that a linear polarization is a circular polarization or a circular polarization is a linear polarization. The polarizers 23a and 23b to be converted are formed. At this time, the current i1 is supplied to the set coil 32s of the phase shifter 24 from the set driver 25s of the drive circuit 25, and the reset driver 32 of the drive circuit 25 is supplied to the reset coil 32r. The current i2 is supplied and flows from 25r, and the magnitudes of the currents i1 and i2 are varied under the control of the phase controller 27 to automatically vary the phase of the high frequency signal passing through the junction rod. And the shape of the bonding rod can be implemented in a variety of shapes, such as circular columnar or square columnar. As the waveguide 36a on the distributor / compositor 10 side and the waveguide 36b on the copying machine 30 side, a spherical waveguide or a cylindrical waveguide may be used.

In such a configuration, the high frequency radio signal transmitted from the transmitter 8 through the rotary joint 5 is input to the inlet feed point 14 of the broadband power divider 110 and thus the number of horizontal radiating elements in the broadband power divider 110. (n) is distributed and transmitted to the phase shifters 120-1 to 120-n, and the phase shifters 120-1 to 120-n are radio frequency radios according to the phase control signal transmitted from the phase controller 140. The phase of the signal is displaced and transmitted to the corresponding horizontal radiation elements 130-1 to 130-n via the U-links 150-1 to 150-n, and radiated to the air. The phase controller 140 generates a phase control signal according to the scan control signal transmitted from the control and monitor 9 through the rotary joint 5 and provides the phase control signal to the phase shifters 120-1 to 120-n. .

That is, as shown in FIG. 2, when the high frequency signal generated by the transmitter 8 enters the rotary joint 5, the main antenna 100 for target search feeds into the antenna 100 while rotating through the rotating body. do. The fed high frequency signal enters the broadband power divider feed-in point 14 and is appropriately distributed by the broadband power divider 110 and then transmitted to the corresponding phase shifters 120-1 to 120-n. In the crisis 120-1 to 120-n, the phases are changed differently, so that signals having different phases are transmitted to the corresponding radiation element groups 130-1 to 130-n and radiated. After transmission, the signal reflected from the target is again received through the target antenna 100 for searching for the target, and then transmitted to the receiver 8 through a path opposite to that of the transmission, and the received signal is analyzed by the control and monitor 9. It detects the target's location (distance and altitude, etc.) and its moving speed.

At this time, the phase shifters 120-1 to 120-n periodically perform dozens of times per second through phase controllers 140 connected to each other in order to continuously control the phase shifters 120-1 to 120-n. The phases are varied with each other to form a pencil beam at a vertical elevation angle. In addition, the broadband power divider 110 serves to lower the side lobe level by distributing the transmission power unevenly, and the antenna radiation elements 130-1 to 130-n have various polarizations such as slot waveguides, linear polarizations, or circular polarizations. Can be implemented.

As described above, the target search antenna 100 according to the present invention has a low angle of view even when the vertical beam is not moved in the vertical direction by varying the elevation angle of the vertical beam due to the phase shifters 120-1 to 120-n for automatically adjusting the phase. The elevation of the target may be detected (scanned), and the horizontal joint angle of the omnidirectional target may be detected by rotating the entire antenna 10 360 degrees due to the rotary joint 5.

2. PIA identification antenna

As illustrated in FIG. 6, the PIA antenna 200 of the present invention includes a combiner 202 for generating a sum and a difference pattern, and two broadband power dividers 110a for distributing the classified signals from the combiner 202. 110b), and the radiation element groups 210-1 to 210-n and 210'-1 to 210'-n arranged horizontally and symmetrically about the center where the combiner 202 is located; , The right radiation element group) and the central omni-directional antenna 220. In this case, the left and right radiating element groups 210-1 to 210-n and 210'-1 to 210'-n may be implemented by various antennas such as Yagi antenna, slot antenna, and strip antenna. It can be modified by various polarizations such as polarization.

In more detail, when a high frequency signal (pia identification high frequency signal) having a frequency different from that of the target detection generated by the transceiver 8 is introduced into the rotary joint 5, the high frequency signal for pia identification is a rotary joint ( The power is fed to the combiner 202 via the phase controller 140 connected with 5). The high frequency signal supplied to the combiner 202 is distributed at a constant rate through the coaxial feed line, and the left and right radiating element groups 210-1 to 210-n and 210'-1 to 210'-n of the PIA antenna are separated. After being transmitted to the central omni-directional antenna 220, the transmission is made by copying in the direction of the target.

The signal copied at the transmission includes an encryption code for identifying the PIA, and the signal reflected from the target is received by the PIA identifying antenna 200 through the reverse path at the time of transmission. Coupler 202 consists of a 180-degree hybrid or a 90-degree hybrid, a 90-degree phase feed, a Rat Race Ring and a Walkilson divider. The antenna 200 is connected, and the omni-directional antenna 220 is connected to the input terminal of the Walkinson divider. The hybrid generates a sum pattern and a difference pattern of signals received from the left and right radiation elements, and the divider uses a notch pattern using the difference pattern and the signal received from the omnidirectional antenna 220. Outputs Therefore, the sum pattern generated in the hybrid racelace ring and the notch pattern generated in the Walkinson divider are output from the output port of the combiner 202. That is, a signal input from each of the left and right radiating element groups 2 ₁ to 2n and 2 ' ₁ to 2'n generates a sum pattern and a difference pattern by using the above-described lattice ring, and generates an omni-directional antenna ( The signal input from 220 is combined with the difference pattern described above using a Walkins divider to generate a notch pattern. In this case, the omni-directional antenna 220 is preferably to have the same range in all directions using an antenna having a non-directional characteristic, such as omni antenna.

Accordingly, the PIA identification antenna 200 uses a different frequency band, that is, the UHF band or the microwave band, from the target search antenna 100, and the high frequency power supplied is distributed at a constant rate in the combiner 202 to radiate the radiation element 210. -1 ~ 210-n, 210'-1 ~ 210'-n) and radio wave radiation to the omni-directional antenna 220, reflected from the target and received back to the combiner 202 to generate a sum, difference pattern, and notch pattern. To identify the pia.

With the configuration of the target search antenna 100 and the PIA identification antenna 200, the target detection antenna 10 according to the present invention is a vertical array of horizontal array radiation element group 130-1 ~ 130-n Automatically adjust the phase to change the direction of the vertical beam to form a high-gain, narrow band vertical beam, and rotate the entire antenna 10 in the horizontal direction to enable 360 degrees of continuous rotation of the horizontal beam. It provides the ability to detect pia angles while simultaneously identifying horizontal angles.

On the other hand, as shown in Fig. 2a to 2c is applied to the entire deflection cover 4, that is, an insulator with good radio wave transmittance to protect the internal antenna from environmental changes, the power ratio in the horizontal and vertical direction is It is desirable to minimize the side lobe by disproportionating the elements.

Figure 7 shows the vertical and horizontal radiation pattern of the antenna according to the present invention, (a) shows a vertical radiation pattern, (b) shows a horizontal radiation pattern.

In FIG. 7, reference numeral “A” is a side view of the antenna, “I _VO ” is a vertical radiation pattern of the PIA identification omnidirectional antenna 220, and “I _V ” is a vertical pattern of the PIA identification antenna 200, “P _V1. P _Vn "is the vertical pattern of the target search antenna 100," I _HO "is the heart-shaped horizontal radiation pattern of the pia identification omnidirectional antenna 220," I _H "is the horizontal of the pia identification antenna 200 The radiation pattern, "P _H1 to P _Hn ", is a horizontal radiation pattern of the target search antenna 100.

First, looking at the vertical radiation pattern of the antenna shown in (a), the PIA identification antenna 200 is a hemispherical shape (I _V ), the omni-directional antenna 220 located on the top of the PIA identification antenna 200 Is an _octagonal shape (I _VO ), and the target search antenna 100 is a vertical beam (pencil beam) with sensitive directivity, and shows that the elevation angle is changed up and down. As described above, the vertical radiation patterns P _V1 to P _{Vn of the} target search antenna 100 are electrically dozens of phases in one second using the phase controller 140 and the phase shifters 120-1 to 120-n. By automatically adjusting the angle, the direction of the vertical beam can be changed to accurately detect the target at the lower or upper elevation angle.

Looking at the horizontal radiation pattern of the antenna shown in (b), the omni-directional antenna 220 is a heart-shaped (I _HO ) has a characteristic of a single directivity in the horizontal plane, the radiation pattern (P) of the target antenna 100 for search _H1 to P _Hn ) is more directional than the PIA identification antenna 200, and thus, it is easy to identify a PIA after detecting a target of a long distance. At this time, the side lobe refers to the rest of the main beam except for the main beam, which shows high electric field strength and power density. The lower the side lobe level, the easier it is to track and accurately detect an object.

This invention is not limited to the above-mentioned embodiment, It can be implemented in various applications or modifications within the range which the technical idea of this invention allows.

As described above, according to the present invention, the phase of the vertically arranged horizontal array radiating element group is electrically changed (scanned) so that the altitude (eft angle / elevation angle) of the target object located in all directions even when the antenna does not move in the vertical direction. At the same time, the antenna itself can be rotated 360 degrees in the horizontal direction to detect the horizontal direction angle of the omnidirectional target, enabling a high performance antenna with a very simple control mechanism and mechanical structure. Furthermore, it is equipped with a pia identification antenna together with the target detection antenna, which makes it easy to identify the pia, and by distributing the power ratio in the horizontal or vertical direction unevenly through the broadband power divider of the target detection antenna, the subleaf level is reduced. Can be minimized. Conventional antennas use phase shifters in the vertical direction to form cosecant fan beams (very wide beam widths), so they cannot know the exact elevation and elevation angles only by knowing the horizontal position of the search object. In order to prevent such closure, the phase shifter controller precisely controls the phase to form a pencil beam with a very narrow beam width, and controls the elevation angle to accurately identify the height and elevation distance of the object to be inspected.

Claims (5)

In the antenna consisting of a target detection antenna for detecting a target, and a Pia identification antenna for identifying a Pia, The target detection antenna, A wideband power distributor for distributing high frequency signals drawn from the rotary joints; A phase shifter for varying a phase of a high frequency signal distributed from the broadband power divider according to a phase control signal; A direction change connector for changing a direction of an output signal of the phase shifter; A radiating element array in which horizontally connected radiating elements are arranged vertically and radiating high frequency signals transmitted from the redirection connection parts into the air; And A phase controller for controlling the phase shifter, The phase shifter, A first impedance matching unit for matching impedance to efficiently transmit an input / output signal; A first polarizer for converting an input signal from a linearly polarized wave to a circularly polarized wave at the time of transmission and converting the circularly polarized wave to a linearly polarized wave at reception; A driving circuit outputting a driving current for shifting a phase of the high frequency signal according to the control of the phase controller; A phase shift unit for shifting a phase of the high frequency signal according to the driving current; A second polarizer for converting an input signal from a circularly polarized wave to a linearly polarized wave at the time of transmission and converting the linearly polarized wave to a circularly polarized wave at the time of reception; And 3D antenna for target detection, characterized in that it comprises a second impedance matching unit for matching the impedance to efficiently transmit the input and output signals. The broadband power divider of claim 1, wherein A sector horn forming an outer housing of the horn structure; One or more diaphragms installed in a predetermined space inside the sector horn to distribute power, The diaphragm is An input unit disposed at a predetermined position inside the sector horn; A guide formed along the shape of the sector horn; 3D antenna for target detection, characterized in that the output portion disposed toward the opening surface of the sector horn. According to claim 2, The broadband power divider, 3D antenna for target detection, characterized in that the path is bent toward the center portion of the sector horn so that the length of the entire path is the same. The method of claim 2, wherein the input unit A peak portion into which power is introduced; A conversion unit having a thickness increased from the peak part at a predetermined ratio along the sector horn, The peak portion is arranged in a symmetrical parallel structure on a concentric circle of a predetermined radius around the length of the sector horn, and the conversion unit is arranged in a symmetrical parallel structure on a concentric circle of a predetermined radius around the length of the sector horn 3D antenna for detection. According to claim 1, The three-dimensional antenna for detecting the target, And the phase controller controls the phase of the phase shifter to construct a pencil beam to search elevation angles, elevations, and distances of the object to be searched.