KR102409804B1 - Antenna apparatus and automotive radar apparatus having the same - Google Patents

Abstract

An antenna device according to an embodiment is an antenna device for a radar system, comprising: a plurality of radiators; and a feeding unit comprising a plurality of feeding lines respectively connected to the plurality of radiators, and a distribution unit distributing a signal received from a feeding point to the plurality of feeding lines, respectively, wherein the distribution unit includes: It includes a plurality of feeding ports respectively connected to the feeding lines, and a branching portion branched from at least one feeding port of the plurality of feeding ports.

Description

Antenna device and vehicle radar device including the same

The present invention relates to an antenna device and a vehicle radar device including the same, and more particularly, to an antenna device capable of forming a wide-angle beam through fine power distribution, and a vehicle radar device including the same.

In general, radar systems are being applied to various technical fields. At this time, the radar system is mounted on the vehicle to improve the mobility of the vehicle. Such a radar system detects information on the surrounding environment of the vehicle by using electromagnetic waves. And as the corresponding information is used for the movement of the vehicle, the efficiency of vehicle mobility may be improved. To this end, the radar system is provided with an antenna arrangement. That is, the radar system transmits and receives electromagnetic waves through the antenna device. In this case, the antenna device includes a plurality of radiators. Here, the radiators are formed in a certain size and shape.

However, the antenna device of the radar system as described above has a problem in that the performance of the radiators is not uniform. This is because, depending on the positions of the radiators in the antenna device, environmental factors such as a loss rate occur differently. In addition, the antenna device of the radar system as described above has a problem of having a certain detection range. For this reason, it is difficult for the radar system to detect information in a wide range by having one antenna device. Alternatively, when the radar system includes a plurality of antenna devices, the size of the radar system may be enlarged, and the cost may increase.

An embodiment of the present invention provides an antenna device capable of improving the operational efficiency of a radar system, and a vehicle radar device including the same.

In addition, an embodiment according to the present invention provides an antenna device including a power feeding unit capable of distributing fine power to a plurality of radiators, and a vehicle radar device including the same.

Technical tasks to be achieved in the proposed embodiment are not limited to the technical tasks mentioned above, and other technical tasks not mentioned are clear to those of ordinary skill in the art to which the proposed embodiment belongs from the description below. can be understood clearly.

An antenna device according to an embodiment is an antenna device for a radar system, comprising: a plurality of radiators; and a feeding unit comprising a plurality of feeding lines respectively connected to the plurality of radiators, and a distribution unit distributing a signal received from a feeding point to the plurality of feeding lines, respectively, wherein the distribution unit includes: It includes a plurality of feeding ports respectively connected to the feeding lines, and a branching portion branched from at least one feeding port of the plurality of feeding ports.

In addition, the plurality of feed lines extend in one direction and are arranged in parallel in the other direction perpendicular to the one direction.

In addition, the plurality of power feeding ports are arranged along the other direction and are sequentially connected.

In addition, each of the plurality of feeding ports includes a first connection part extending in the other direction, connected to the first connection part, extending from the first connection part in the one direction, and connected to the feeding lines, respectively and a second connection.

In addition, the branch unit has one end connected to a second connection part of a first feeding port among the plurality of feeding ports, and the other end connected to a second connection part of a second feeding port of the plurality of feeding ports.

The branching unit may further include a branch line connecting a first connection point in contact with the second connection part of the first feeding port and a second connection point in contact with the second connection part of the second feeding port.

In addition, the second feeding port is a feeding port spaced farthest from the feeding point among the plurality of feeding ports, and the first feeding port is a first connection part directly connected to the first connection part of the second feeding port. It is a feeding port that includes.

In addition, the phase of the signal supplied to the first connection point is the same as the phase of the signal supplied to the second connection point.

In addition, the phase of the signal supplied to the first connection point has an inverted phase of the signal supplied to the second connection point.

In addition, a slit recessed in the inner direction of the second connection part is formed in the second connection part of the second power feeding port.

In addition, in the antenna device of the radar system, a plurality of radiators; and a plurality of feeding lines respectively connected to the plurality of radiators, a feeding port respectively connected to the plurality of feeding lines, and a signal received from a feeding point through the feeding port to the plurality of feeding lines. Each of the plurality of feeding ports includes a feeding unit including a distributing unit, wherein the plurality of feeding lines extend in one direction and are arranged in parallel in the other direction perpendicular to the one direction, and each of the plurality of feeding ports is, a first connection part extending in a direction and sequentially connected; A slit recessed in the inward direction is formed in the second connection portion of at least one of the feed ports of the feed port.

In addition, the distribution unit may further include a branching unit branching from at least one of the plurality of power feeding ports.

In addition, the branch unit has one end connected to a second connection part of a first feeding port among the plurality of feeding ports, and the other end connected to a second connection part of a second feeding port of the plurality of feeding ports.

The branching unit may further include a branch line connecting a first connection point in contact with the second connection part of the first feeding port and a second connection point in contact with the second connection part of the second feeding port.

In addition, the second feeding port is a feeding port spaced farthest from the feeding point among the plurality of feeding ports, and the first feeding port is a first connection part directly connected to the first connection part of the second feeding port. It is a feeding port that includes.

In addition, the phase of the signal supplied to the first connection point is the same as the phase of the signal supplied to the second connection point.

In addition, the phase of the signal supplied to the first connection point has an inverted phase of the signal supplied to the second connection point.

On the other hand, a vehicle radar device according to an embodiment includes a case; and a printed circuit board accommodated in the case and including an antenna device, wherein the antenna device includes a plurality of radiators, a plurality of feed lines respectively connected to the plurality of radiators, and a feed point received from and a feeding unit including a distribution unit for distributing a signal to a plurality of feeding lines, respectively, wherein the distribution unit includes a plurality of feeding ports respectively connected to the plurality of feeding lines, and at least one of the plurality of feeding ports. It is formed in one feeding port and includes an adjustment unit for reducing the level of a signal supplied to the corresponding feeding port.

In addition, the adjustment unit, one end is connected to the first feed port, the other end is connected to the other end to the second feed port, and supplies a signal supplied through the first feed port to the second feed port, and a branching unit configured to re-supply a signal supplied through the second feeding port to the first feeding port.

In addition, the adjusting unit is formed in at least one of the plurality of power feeding ports, and includes a slit recessed inward.

According to an embodiment of the present invention, by adding a branch line to a port to which excessive power is allocated, only necessary power is transmitted to the corresponding port, and the remaining power is separated into other ports through the separation line, whereby fine power of 0.1 or less Distribution is possible, and accordingly, the beam width can be expanded by filling the null section of the main lobe and the side lobe of the antenna.

In addition, according to an embodiment of the present invention, various detection distances may be implemented in one antenna device, and through this, the radar system may be provided with one antenna device to secure a desired detection range. In other words, the detection range of the radar system can be expanded without increasing the size of the radar system. Accordingly, the performance of the radar system may be improved. Furthermore, the manufacturing cost of the radar system can be reduced.

Further, according to an embodiment of the present invention, by inducing mismatching by adding a slit to the branch line, the power transmitted through the separation line can be reduced to a desired value, and the power reflected through the separation line It is possible to reduce the decrease in performance due to noise by blocking the inflow of

1 is a plan view showing an antenna device of a general radar system.
2 is a plan view showing a power feeding unit of a general antenna device.
3 is a block diagram illustrating an internal configuration of a radar module according to an embodiment of the present invention.
4 is a plan view showing the antenna device of the radar system according to the first embodiment of the present invention.
5 is a plan view showing a power feeding unit of the antenna device according to the first embodiment of the present invention.
6 is a plan view showing a power feeding unit of the antenna device according to the second embodiment of the present invention.
7 is a plan view illustrating a power feeding unit of an antenna device according to a third embodiment of the present invention.
8 is a graph for explaining a gain for each sensing angle of the antenna device according to an embodiment of the present invention.
9 is an exemplary diagram for explaining a beam width of an antenna device according to an embodiment of the present invention.
10 is a perspective view illustrating a vehicle radar device according to an embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Combinations of each block in the accompanying drawings and each step in the flowchart may be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment may be in each block of the drawing or each of the flowcharts. Steps will create a means for performing the functions described. These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible to produce an article of manufacture containing instruction means for performing the functions described in each block of the drawing or in each step of the flowchart, the instructions stored in the block. The computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It is also possible that the instructions for performing the processing equipment provide steps for carrying out the functions described in each block of the figure and each step of the flowchart.

Further, each block or each step may represent a module, segment, or portion of code comprising one or more executable instructions for executing specified logical function(s). It should also be noted that, in some alternative embodiments, it is possible for the functions recited in blocks or steps to occur out of order. For example, it is possible that two blocks or steps shown one after another may in fact be performed substantially simultaneously, or that the blocks or steps may sometimes be performed in the reverse order according to the corresponding function.

1 is a plan view showing an antenna device of a general radar system. And FIG. 2 is a plan view showing a power feeding unit of a general antenna device. At this time, FIG. 2 is an enlarged view showing an enlarged area 'A' in FIG. 1 to FIG. 2 .

1 and 2 , in general, the antenna device 100 of a radar system includes a power supply unit 110 and a plurality of radiators 150 .

The power feeding unit 110 supplies signals from the antenna device 100 to the radiators 150 . At this time, the power supply 110 is connected to a control module (not shown). In addition, the power feeding unit 110 receives a signal from the control module and supplies the signal to the radiators 150 . At this time, in the feeding unit 110 , a feeding point 120 is defined. That is, the power feeding unit 110 receives a signal through the feeding point 120 . In addition, the power feeding unit 110 is made of a conductive material. Here, the power feeding unit 110 may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni). The feeding unit 110 includes a plurality of feeding lines 130 and a distribution unit 140 .

The feed lines 130 extend in one direction. And the feed lines 130 are arranged parallel to each other in the other direction. Here, the feed lines 130 are disposed to be spaced apart from each other at a predetermined interval. And a signal is transmitted from one end to the other end in each feed line 130 .

The distribution unit 140 supplies a signal from the feeding point 120 to the feeding lines 130 . At this time, the distribution unit 140 distributes the signal to the feed lines 130 . This distribution unit 140 includes a plurality of feeding ports (141, 142, 143, 144, 145, 146, 147 and 148). Here, each of the feeding ports 141 , 142 , 143 , 144 , 145 , 146 , 147 and 148 is connected to each of the feeding lines 130 . At this time, the feeding ports (141, 142, 143, 144, 145, 146, 147 and 148) are arranged in parallel with each other in the other direction. And the feeding ports (141, 142, 143, 144, 145, 146, 147 and 148) are sequentially connected. Through this, the feed ports (141, 142, 143, 144, 145, 146, 147 and 148), the signal is transmitted sequentially.

The radiators 150 radiate signals from the antenna device 100 . At this time, here, the radiators 120 are dispersedly disposed in the power feeding unit 110 . And the radiators 120 are connected to the power feeding unit 110 . Here, the radiators 120 are connected to the feed lines 130 . Through this, a signal is supplied from the power feeding unit 110 to the radiators 150 . And the radiators 150 are made of a conductive material. Here, the radiators 150 may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

According to the general antenna device 100, the distribution unit 140 does not distribute the signal with the same intensity in correspondence to the feeding ports (141, 142, 143, 144, 145, 146, 147, and 148). That is, the distribution unit 140 cannot finely adjust the signal distributed to the feed lines 130 . Specifically, the distribution unit 140 distributes a signal with a relatively high intensity to some of the feeding ports 141, 142, 143, 144, 145, 146, 147 and 148, and the feeding ports 141, 142, 143, 144, 145, 146, 147, and 148) distribute the signal with a relatively low intensity to the rest. This is because the feeding ports (141, 142, 143, 144, 145, 146, 147 and 148) are arranged in parallel with each other, and sequentially connected. That is, as the feed ports (141, 142, 143, 144, 145, 146, 147 and 148) sequentially transmit signals, the feed ports (141, 142, 143, 144, 145, 146, 147 and 148) in A signal can be distributed with a lower intensity toward the end.

On the other hand, such an antenna device, the feeding port (141, 142, 143, 144, 145, 146, 147, and 148) of the feed port (141, 142, 143, 144, 145, 146, 147 and 148) to fill the null section of the main lobe and the side lobe of the antenna with the feeding port disposed at the end. Only minute signals should be transmitted. That is, a signal having a magnitude of 0.1 or less should be transmitted to the feeding port 141 . However, it is difficult to transmit a signal having a magnitude of 0.1 or less to the feeding port 141 by the structure of the feeding unit as described above.

3 is a block diagram illustrating an internal configuration of a radar module according to an embodiment of the present invention. Referring to FIG. 3 , the radar module may include an antenna device 200 , a signal processing unit 20 , and a control unit 30 .

The radar module may perform a function of detecting the motion of an object in an area surrounding the current location. That is, the radar module may detect information about the surrounding environment through electromagnetic waves and detect the movement of the object by the motion of the object.

The antenna device 200 may include a transmit antenna unit 210 and a receive antenna unit 230 . The antenna device 200 performs a radio transmission/reception function of the radar module. That is, the antenna device 200 may transmit a transmission signal to the air and receive a reception signal from the air. Here, the transmission signal represents a radio signal transmitted from the radar module. In addition, the received signal represents a radio signal flowing into the radar module as the transmitted signal is reflected by the target.

The transmission antenna unit 210 may transmit a transmission signal to the air, and the reception antenna unit 230 may receive a reception signal from the air. In an embodiment, the transmit antenna unit 210 and the receive antenna unit 230 may be short-range antennas, but is not limited thereto.

The signal processing unit 20 may perform a radio processing function of the radar module. In this case, the signal processing unit 20 may process a transmission signal and a reception signal. The signal processing unit 20 may include a transmission processing unit 21 and a reception processing unit 23 .

The transmission processing unit 21 may generate a transmission signal from the transmission data. The transmission processing unit 21 may output a transmission signal to the transmission antenna unit 210 . The transmission processing unit 23 may include an oscillator (not shown), for example, the oscillator may include a voltage controlled oscillator (VCO) and an oscillator.

The reception processing unit 23 may receive a reception signal from the reception antenna unit 230 . The reception processing unit 23 may generate reception data from the reception signal. The reception processing unit 23 may include a low noise amplifier (LNA; not shown) and an analog-to-digital converter (ADC; not shown). The low noise amplifier may amplify the received signal to low noise, and the analog-to-digital converter may generate the received data by converting the received signal from an analog signal to digital data.

The controller 30 may drive the radar module. The controller 30 may drive the radar module while driving the vehicle. The controller 30 controls the radar module to determine whether an object is detected in a region surrounding the current location. The control unit 30 processes transmission data and reception data. The control unit 30 may control the transmission processing unit 210 to generate a transmission signal from transmission data. The control unit 30 may control the reception processing unit 23 to generate reception data from the reception signal. The controller 30 may synchronize the transmitted data and the received data. The controller 30 may perform a CFAR operation, a tracking operation, a target selection operation, and the like with the received data to extract angle information, speed information, and distance information about the target.

4 is a plan view showing the antenna device of the radar system according to the first embodiment of the present invention. And FIG. 5 is a plan view showing a power feeding unit of the antenna device according to the first embodiment of the present invention. At this time, FIG. 5 is an enlarged view showing an enlarged area 'B' in FIG. 4 .

4 and 5 , in the present embodiment, the antenna device 200 of the radar system includes a power supply unit 210 and a plurality of radiators 250 .

The power feeding unit 210 supplies signals from the antenna device 200 to the radiators 250 . At this time, the power feeding unit 210 is connected to the control unit 30 . In addition, the power supply unit 210 receives a signal from the control unit 30 and supplies the signal to the radiators 250 . At this time, in the feeding unit 210 , a feeding point 220 is defined. That is, the feeding unit 210 receives a signal through the feeding point 220 . In addition, the power feeding unit 210 is made of a conductive material. Here, the power supply unit 210 may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni). The power feeding unit 210 includes a feeding line unit 230 and a distribution unit 240 .

The feed line unit 230 supplies signals to the radiators 250 . In this case, the power supply line 230 is connected to the radiators 250 .

The feed line unit 230 includes a plurality of feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 . At this time, the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 extend in one direction. And the feed lines (231, 232, 233, 234, 235, 236, 237 and 238) are arranged parallel to each other in the other direction. Here, the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 are disposed to be spaced apart from each other at regular intervals. And each of the feed lines (231, 232, 233, 234, 235, 236, 237 and 238) from one end to the other end, the signal is transmitted.

For example, the feed line unit 230 may include eight feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 . And the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 may be arranged side by side in a transverse axis.

Here, the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 are along the transverse axis, respectively, the feed line 1 ( 231 ), the feed line 2 ( 232 ), the feed line 3 ( 233 ), and the feed line 4 234 , a feed line 5 ( 235 ), a feed line 6 ( 236 ), a feed line 7 ( 237 ), and a feed line 8 ( 238 ) may be defined.

In addition, based on the feeding point 220 , the feeding lines 231 , 232 , 233 , 234 , 235 , 236 , 237 , and 238 may be divided and disposed. Here, based on the feeding point 220, the feeding line 1 (231), the feeding line 2 (232), the feeding line 3 (233), and the feeding line 4 (234) are arranged on one side, and the feeding line on the other side. 5 ( 235 ), a feed line 6 ( 236 ), a feed line 7 ( 237 ), and a feed line 8 ( 238 ) may be disposed.

The distribution unit 240 receives a signal from the feed point 220 , distributes the received signal and supplies it to the feed line unit 230 . At this time, the distribution unit 240 distributes signals to the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 . This distribution unit 240 includes a plurality of feed ports (241, 242, 243, 244, 245, 246, 247 and 248). Here, the number of feeding ports 241, 242, 243, 244, 245, 246, 247 and 248 in the distribution unit 240 is, the number of feeding lines 231, 232, 233, 234, 235 in the feeding line unit 230 , 236, 237 and 238). And each of the feed ports 241 , 242 , 243 , 244 , 245 , 246 , 247 and 248 is connected to each of the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 . At this time, the feeding ports 241 , 242 , 243 , 244 , 245 , 246 , 247 and 248 are arranged parallel to each other in the other direction. In addition, the feed ports 241, 242, 243, 244, 245, 246, 247 and 248 are sequentially connected. Through this, in the feed ports (241, 242, 243, 244, 245, 246, 247 and 248), the signal is transmitted sequentially.

For example, the distribution unit 240 may include eight feed ports 241 , 242 , 243 , 244 , 245 , 246 , 247 and 248 . And the feed ports (241, 242, 243, 244, 245, 246, 247 and 248) in the transverse axis, may be arranged side by side. Here, the feed ports 241 , 242 , 243 , 244 , 245 , 246 , 247 and 248 are along the transverse axis, feed port 1 241 , feed port 2 242 , feed port 3 243 , feed port 4 244 , feed port 5 245 , feed port 6 246 , feed port 7 247 , and feed port 8 248 . Also feed port 1 (241), feed port 2 (242), feed port 3 (243), feed port 4 (244), feed port 5 (245), feed port 6 (246), feed port 7 (247) and Feed port 8 (248) is feed line 1 (231), feed line 2 (232), feed line 3 (233), feed line 4 (234), feed line 5 (235), feed line 6 (236), feed It may be individually connected to the line 7 (237) and the feed line 8 (238). In addition, based on the feeding point 220 , the feeding ports 241 , 242 , 243 , 244 , 245 , 246 , 247 and 248 may be dividedly disposed.

In this case, the feeding port 1 ( 241 ), the feeding port 2 ( 242 ), the feeding port 3 ( 243 ), and the feeding port 4 ( 244 ) may be disposed on one side of the feeding point 220 . The feeding port 1 241 may include a first connection part 241a and a second connection part 241b. In addition, the feeding port 2 242 may include a first connection part 242a, a second connection part 242b, and a branch part 242c. One end of the branch portion 242c is connected to the feed port 1 (241), and the other end is connected to the feed port 2 (242).

In other words, the branch unit 242c transmits the signal supplied to the feed line 1 (231) to the feed line 2 (232) or transmits the signal supplied through the feed line 2 (232) to the feed line 1 (231).

In addition, the feeding port 3 ( 243 ) may include a first connection part ( 243a ) and a second connection part ( 243b ). In addition, the feed port 4 244 may include a first connection portion 244a and a second connection portion 244b. Here, in the reverse direction from the feeding point 220 to the other direction, the feeding port 4 244 , the feeding port 3 243 , the feeding port 2 242 , and the feeding port 1 241 may be arranged in the order.

Specifically, the feeding port 4 244 may be connected to the feeding point 220 . That is, in the feeding port 4 244 , the first connection part 244a may be connected to the feeding point 220 , and may extend in another direction from the feeding point 220 .

In addition, in the feeding port 4 244 , the second connection part 244b may be connected to the first connection part 244a and may extend from the first connection part 244a in one direction. Here, the second connection portion 244b may be connected to the feed line 4 (234).

And the feed port 3 (243) may be connected to the feed port 4 (244). That is, in the feed port 3 (243), the first connection portion (243a) is connected to the first connection portion (244a) of the feed port 4 (244), from the first connection portion (244a) of the feed port 4 (244) in the other direction can be extended Also, in the feeding port 3 ( 243 ), the second connection part 243b may be connected to the first connection part 243a and may extend from the first connection part 243a in one direction. Here, the second connection part 243b may be connected to the feed line 3 (233).

Also, feed port 2 ( 242 ) may be connected to feed port 3 ( 243 ). That is, in the feeding port 2 ( 242 ), the first connection part ( 242a ) is connected to the first connection part ( 243a ) of the feeding port 3 ( 243 ), and from the first connection part ( 243a ) of the feeding port 3 ( 243 ) in the other direction. can be extended In addition, in the feed port 2 ( 242 ), the second connection part ( 242b ) may be connected to the first connection part ( 242a ) and may extend from the first connection part ( 242a ) in one direction. Here, the second connection part 242b may be connected to the feed line 2 232 . In addition, in the feeding port 2 ( 242 ), the branch part ( 242c ) may be connected to the second connection part ( 242b ) and may extend from the second connection part ( 242b ) in a vertical direction in one direction. Preferably, the branch portion 242c may have one end connected to the second connection portion 242b and the other end connected to the second connection portion 241b of the feeding port 1 ( 241 ).

Specifically, the branch portion 242c includes a first connection point (B) and a second connection point (C). In addition, the first connection point (B) is connected to the feeding port 2 (242), and the second connection point (C) is connected to the feeding port 1 (241).

In addition, a portion of the signal supplied to the feed line 2 (232) through the first connection point (B) is branched by the branch unit (242c) and supplied to the feed line 1 (231).

To this end, the branch portion 242c includes a branch line interconnecting the first connection point B and the second connection point C, and accordingly, the feed line 2 (232) through the feed port 2 (242). ), a portion of the signal supplied to the first feed line 231 is supplied, and a part of the signal supplied to the feed line 1 231 through the feed port 1 241 is transferred to the second feed line 232 ) is supplied.

In addition, a portion of the signal supplied through the first connection part 241a of the feeding port 1 ( 241 ) is branched from the second connection point (C) and supplied to the feeding line 2 ( 232 ).

In other words, as described above, a portion of the signal supplied to the feed line 1 (231) is branched through the second connection point (C), and accordingly, the feed line 1 (231) is equal to the size of the branched signal. ) so that the magnitude of the signal supplied to it is reduced.

On the other hand, the phase of the signal supplied to the first connection point (B) is the same as the phase of the signal supplied to the second connection point (C). In other words, the phase of the power applied to the first connection point (B) is the same as the phase of the power applied to the second connection point (C).

In addition, the feeding port 1 ( 241 ) may be connected to the feeding port 2 ( 242 ). That is, in the feeding port 1 ( 241 ), the first connection part ( 241a ) is connected to the first connection part ( 242a ) of the feeding port 2 ( 242 ), and from the first connection part ( 242a ) of the feeding port 2 ( 242 ) in the other direction. can be extended In addition, in the feeding port 1 241 , the second connection part 241b may be connected to the first connection part 241a and may extend from the first connection part 241a in one direction. Here, the second connection part 241b may be connected to the first feed line 231 .

Meanwhile, a feeding port 5 (245), a feeding port 6 (246), a feeding port 7 (247), and a feeding port 8 (248) may be disposed on the other side of the feeding point 220 . The feeding port 5 245 may include a first connection part 245a and a second connection part 245b. In addition, the feeding port 6 246 may include a first connection part 246a and a second connection part 246b. Also, the feeding port 7 247 may include a first connection part 247a , a second connection part 247b , and a branch part 247c . In addition, the feed port 8 ( 248 ) may include a first connection portion ( 248a ) and a second connection portion ( 248b ). Here, along the other direction from the feeding point 220, the feeding port 5 (245), the feeding port 6 (246), the feeding port 7 (247) and the feeding port 8 (248) may be arranged in the order.

Specifically, the feeding port 5 (245) may be connected to the feeding point (220). That is, in the feeding port 5 245 , the first connection part 245a may be connected to the feeding point 220 , and may extend from the feeding point 220 in the other direction. In addition, in the feeding port 5 245 , the second connection part 245b may be connected to the first connection part 245a and may extend from the first connection part 245a in one direction. Here, the second connection part 245b may be connected to the feed line 5 (235).

And feed port 6 (246) may be connected to the feed port 5 (245). That is, in the feeding port 6 246 , the first connection part 246a is connected to the first connection part 245a of the feeding port 5 245 , and from the first connection part 245a of the feeding port 5 245 in the other direction. can be extended Also, in the feeding port 6 246 , the second connection part 246b may be connected to the first connection part 246a and may extend from the first connection part 246a in one direction. Here, the second connection part 246b may be connected to the feed line 6 (236).

Feed port 7 (247) may also be connected to feed port 6 (246). That is, in the feeding port 7 247 , the first connection part 247a is connected to the first connection part 246a of the feeding port 6 246 , and from the first connection part 246a of the feeding port 6 246 in the other direction. can be extended In addition, in the feeding port 7 247 , the second connection part 247b may be connected to the first connection part 247a and may extend from the first connection part 247a in one direction. Here, the second connection part 247b may be connected to the feed line 7 ( 237 ).

In addition, in the feeding port 7 247 , the branch 247c may be connected to the second connection part 247b and may extend from the second connection part 247b in a vertical direction in one direction.

In addition, feed port 8 (248) may be connected to feed port 7 (247). That is, in the feeding port 8 (248), the first connection portion (248a) is connected to the first connection portion (247b) of the feeding port 7 (247), from the first connection portion (247b) of the feeding port 7 (247) in the other direction can be extended In addition, in the feeding port 8 ( 248 ), the second connection part 248b may be connected to the first connection part 248a and may extend from the first connection part 248a in one direction. Here, the second connection part 248b may be connected to the eighth feed line 238 .

Specifically, the branch portion 247c includes a first connection point (B) and a second connection point (C). In addition, the first connection point (B) is connected to the feeding port 7 (247), and the second connection point (C) is connected to the feeding port 8 (248).

In addition, a portion of the signal supplied to the feed line 7 (237) through the first connection point (B) is branched by the branch unit 247c and supplied to the feed line 8 (238).

In addition, a portion of the signal supplied through the first connection part 248a of the feeding port 8 (248) is branched from the second connection point (C) and supplied to the feeding line 7 (237).

In other words, the branch unit 247c causes a portion of the signal supplied to the feed line 8 (238) to be branched through the second connection point (C) as described above, and accordingly, by the size of the branched signal The magnitude of the signal supplied to the feed line 8 (238) is reduced.

On the other hand, the phase of the signal supplied to the first connection point (B) is the same as the phase of the signal supplied to the second connection point (C). In other words, the phase of the power applied to the first connection point (B) is the same as the phase of the power applied to the second connection point (C).

To this end, the branch portion 247c includes a branch line interconnecting the first connection point B and the second connection point C, and accordingly, the feeding line 7 (237) through the feeding port 7 (247). ), a portion of the signal supplied to the eighth feed line 238 is supplied, and a part of the signal supplied to the feed line 8 (238) through the feed port 8 (248) is transferred to the seventh feed line 237 ) is supplied.

On the other hand, the branch portions 242c and 247c as described above are disposed on a power supply line requiring fine power distribution. Preferably, the branch portions 242c and 247c are connected to the first and eighth feed lines furthest from the feeding point, and the second and seventh feed lines, one end of which is directly connected to the first and eighth feed lines. .

According to the embodiment of the present invention as described above, by adding a branch line to the port to which excessive power is allocated, only necessary power is transmitted to the corresponding port, and the remaining power is separated into other ports through the separation line, so that 0.1 or less It is possible to distribute the fine power of , and accordingly, the beam width can be enlarged by filling the null section of the main lobe and the side lobe of the antenna.

In addition, according to an embodiment of the present invention, various detection distances may be implemented in one antenna device, and through this, the radar system may be provided with one antenna device to secure a desired detection range. In other words, the detection range of the radar system can be expanded without increasing the size of the radar system. Accordingly, the performance of the radar system may be improved. Furthermore, the manufacturing cost of the radar system can be reduced.

The radiators 250 radiate signals from the antenna device 200 . At this time, the radiators 250 are connected to the power feeding unit 210 . Here, the radiators 250 are dispersedly disposed in the power supply line unit 230 . Through this, a signal is supplied from the power feeding unit 210 to the radiators 250 . And the radiators 250 are made of a conductive material. Here, the radiators 250 may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

In addition, weights are individually preset to the radiators 250 . That is, a unique weight is set for each radiator 250 . At this time, corresponding to each radiator 250 , the weight is set as a value for impedance matching by acquiring the resonance frequency, radiation coefficient, beam width, and detection distance of the corresponding radiator 250 . Here, in response to each radiator 250 , a weight may be calculated according to a Taylor function or a Chebyshev function. In addition, with respect to the radiators 250 , the weights are set to be symmetrical with respect to the center point of the power feeding unit 210 . Through this, the weight is set differently according to the positions of the radiators 250 .

In addition, each radiator 250 is formed with a variable determined according to each weight. In this case, the variable of the radiator 250 may determine the size of the radiator 250 and the shape of the radiator 250 . These radiators 250 include a connection part 251 and a radiation part 253 . Here, the variables of the radiator 250 include the length of the radiating part 253 and the width of the radiating part 253 .

The connection part 251 is connected to the power feeding part 210 . At this time, the connection unit 251 is connected to the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 . Here, the connection part 251 is connected to the power supply part 210 through one end. And the connection part 251 extends from the power feeding part 210 . At this time, the connection part 251 extends in a direction different from the extending direction of the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 . Here, the connecting portion 251 extends through the other end. Through this, a signal is transmitted from the feed lines 231 , 232 , 233 , 234 , 235 , 236 , 237 and 238 to the connection unit 251 .

The radiation part 253 is connected to the connection part 251 . At this time, the radiation part 253 is connected to the other end of the connection part 251 . Here, the radiation part 253 is connected to the connection part 251 through one end. And the radiating portion 253 extends from the connecting portion (251). At this time, the radiation part 253 extends along the extending direction of the connection part 251 . Here, the radiating part 253 extends through the other end. In addition, the other end of the radiating portion 253 is open (open). Through this, a signal is transmitted from the connection unit 251 to the radiation unit 253 . In this case, the length of the radiating part 253 and the width w1 of the radiating part 253 may be defined. Here, the length of the radiating part 253 may correspond to the extending direction of the radiating part 253 , and the width of the radiating part 253 may correspond to the direction perpendicular to the extending direction of the radiating part 253 .

6 is a plan view showing a power feeding unit of the antenna device according to the second embodiment of the present invention.

Referring to FIG. 6 , the configuration except for the power feeding unit 310 in the antenna device of the present embodiment is similar to the corresponding configuration of the above-described embodiment, and thus a detailed description thereof will be omitted. However, the antenna device of the present embodiment includes a power feeding unit 310 . At this time, in the feeding unit 310 , a feeding point 320 is defined. That is, the feeding unit 310 receives a signal through the feeding point 320 . In addition, the feeding unit 310 includes a feeding line unit 330 and a distribution unit 340 .

The power feeding unit 310 supplies signals from the antenna device 300 to the radiators 350 . At this time, the power feeding unit 310 is connected to the control unit 30 . In addition, the power feeding unit 310 receives a signal from the control unit 30 and supplies the signal to the radiators 350 . At this time, in the feeding unit 310 , a feeding point 320 is defined. That is, the feeding unit 310 receives a signal through the feeding point 320 . In addition, the power feeding unit 310 is made of a conductive material. Here, the power supply unit 310 may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni). The power feeding unit 310 includes a feeding line unit 330 and a distribution unit 340 .

The feed line unit 330 supplies signals to the radiators 350 . At this time, the power supply line 330 is connected to the radiators 350 .

The feed line unit 330 includes a plurality of feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 . At this time, the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 extend in one direction. And the feed lines (331, 332, 333, 334, 335, 336, 337 and 338) are arranged parallel to each other in the other direction.

Here, the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 are disposed to be spaced apart from each other by a predetermined interval. And each of the feed lines (331, 332, 333, 334, 335, 336, 337 and 338) from one end to the other end, the signal is transmitted.

For example, the feed line unit 330 may include eight feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 . And the feed lines (331, 332, 333, 334, 335, 336, 337 and 338) may be arranged side by side in the transverse axis.

Here, the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 are, along the transverse axis, the feed line 1 ( 331 ), the feed line 2 ( 332 ), the feed line 3 ( 333 ), the feed line 4 334 , a feed line 5 ( 335 ), a feed line 6 ( 336 ), a feed line 7 ( 337 ), and a feed line 8 ( 338 ) may be defined.

In addition, based on the feeding point 320 , the feeding lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 may be divided and disposed. Here, with the feed point 320 as the center, a feed line 1 (331), a feed line 2 (332), a feed line 3 (333), and a feed line 4 (334) are disposed on one side, and a feed line on the other side 5 (335), a feed line 6 (336), a feed line 7 (337), and a feed line 8 (338) may be disposed.

The distribution unit 340 receives a signal from the feeding point 320 , distributes the received signal, and supplies the received signal to the feeding line unit 330 . At this time, the distribution unit 340 distributes the signal to the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 . This distribution unit 340 includes a plurality of feed ports (341, 342, 343, 344, 345, 346, 347 and 348). Here, the number of the feeding ports 341, 342, 343, 344, 345, 346, 347 and 348 in the distribution unit 340 is, in the feeding line unit 330, the feeding lines 331, 332, 333, 334, 335 , 336, 337 and 338). And each of the feed ports (341, 342, 343, 344, 345, 346, 347, and 348) is connected to each of the feed lines (331, 332, 333, 334, 335, 336, 337 and 338). At this time, the feeding ports (341, 342, 343, 344, 345, 346, 347, and 348) are arranged in parallel with each other in the other direction. In addition, the feed ports (341, 342, 343, 344, 345, 346, 347 and 348) are sequentially connected. Through this, in the feed ports (341, 342, 343, 344, 345, 346, 347 and 348), the signal is transmitted sequentially.

For example, the distribution unit 340 may include eight feed ports 341 , 342 , 343 , 344 , 345 , 346 , 347 and 348 . And the feed ports (341, 342, 343, 344, 345, 346, 347 and 348) in the transverse axis, may be arranged side by side. Here, the feed ports 341 , 342 , 343 , 344 , 345 , 346 , 347 and 348 are along the transverse axis, feed port 1 341 , feed port 2 342 , feed port 3 343 , feed port 4 344 , feed port 5 345 , feed port 6 346 , feed port 7 347 , and feed port 8 348 . Also feed port 1 (341), feed port 2 (342), feed port 3 (343), feed port 4 (344), feed port 5 (345), feed port 6 (346), feed port 7 (347) and Feed port 8 (348) is feed line 1 (331), feed line 2 (332), feed line 3 (333), feed line 4 (334), feed line 5 (335), feed line 6 (336), feed It may be individually connected to the line 7 (337) and the feed line 8 (338). In addition, based on the feeding point 320 , the feeding ports 341 , 342 , 343 , 344 , 345 , 346 , 347 and 348 may be dividedly disposed.

At this time, a feeding port 1 341 , a feeding port 2 342 , a feeding port 3 343 , and a feeding port 4 344 may be disposed on one side of the feeding point 320 . The feeding port 1 341 may include a first connection part 341a and a second connection part 341b. In addition, the feeding port 2 342 may include a first connection part 342a, a second connection part 342b, and a branch part 342c. The branch portion 342c has one end connected to the feed port 1 341 and the other end connected to the feed port 2 342 .

In other words, the branch unit 342c transmits the signal supplied to the feed line 1 (331) to the feed line 2 (332) or transmits the signal supplied through the feed line 2 (332) to the feed line 1 forward to (331).

Also, the feeding port 3 343 may include a first connection part 343a and a second connection part 343b. In addition, the feed port 4 344 may include a first connection portion 344a and a second connection portion 344b. Here, along a reverse direction from the feeding point 320 to the other direction, the feeding port 4 344 , the feeding port 3 343 , the feeding port 2 342 , and the feeding port 1 341 may be arranged in the order.

Specifically, the feeding port 4 ( 344 ) may be connected to the feeding point ( 320 ). That is, in the feeding port 4 ( 344 ), the first connection part ( 344a ) may be connected to the feeding point ( 320 ) and may extend from the feeding point ( 320 ) in another direction.

In addition, in the feeding port 4 (344), the second connection portion (344b) may be connected to the first connection portion (344a) and extend from the first connection portion (344a) in one direction. Here, the second connection part 344b may be connected to the feed line 4 (334).

And the feed port 3 (343) may be connected to the feed port 4 (344). That is, in the feeding port 3 (343), the first connection part (343a) is connected to the first connection part (344a) of the feeding port 4 (344), and from the first connection part (344a) of the feeding port 4 (344) in the other direction can be extended Also, in the feeding port 3 343 , the second connection part 343b may be connected to the first connection part 343a and may extend from the first connection part 343a in one direction. Here, the second connection part 343b may be connected to the feed line 3 (333).

Also, feed port 2 (342) may be connected to feed port 3 (343). That is, in the feeding port 2 (342), the first connection part (342a) is connected to the first connection part (343a) of the feeding port 3 (343), and from the first connection part (343a) of the feeding port 3 (343) in the other direction can be extended In addition, in the feeding port 2 342 , the second connection part 342b may be connected to the first connection part 342a and may extend from the first connection part 342a in one direction. Here, the second connection part 342b may be connected to the feed line 2 (332). Also, in the feeding port 2 342 , the branch portion 342c may be connected to the second connection portion 342b and may extend from the second connection portion 342b in a vertical direction in one direction. Preferably, the branch portion 342c may have one end connected to the second connection portion 342b and the other end connected to the second connection portion 341b of the feeding port 1 341 .

Specifically, the branch portion 342c includes a first connection point B and a second connection point C. As shown in FIG. In addition, the first connection point (B) is connected to the feeding port 2 (342), and the second connection point (C) is connected to the feeding port 1 (341).

A portion of the signal supplied to the feed line 2 (332) through the first connection point (B) is branched by the branch unit (342c) and supplied to the feed line 1 (331).

To this end, the branch portion 342c includes a branch line interconnecting the first connection point B and the second connection point C, and accordingly, the feed line 2 332 through the feed port 2 342 . ), a portion of the signal supplied to the first feed line 331 is supplied, and a part of the signal supplied to the feed line 1 331 through the feed port 1 341 is transferred to the second feed line 332 . ) is supplied.

In addition, a portion of the signal supplied through the first connection part 341a of the feeding port 1 341 is branched from the second connection point C and supplied to the feeding line 2 332 .

In other words, as described above, a part of the signal supplied to the feed line 1 (331) is branched through the second connection point (C), and accordingly, the feed line 1 (331) is equal to the size of the branched signal. ) so that the magnitude of the signal supplied to it is reduced.

On the other hand, the phase of the signal supplied to the first connection point (B) is such that the inverted phase of the signal supplied to the second connection point (C). In other words, the phase of the power applied to the first connection point (B) is inversely related to the phase of the power applied to the second connection point (C).

Accordingly, the signal supplied to the second connection point C through the first connection point B has an inverse relationship with each other, and accordingly, the magnitude of the signal supplied through the feed line 1 231 can be further reduced. can

In addition, the feeding port 1 (341) may be connected to the feeding port 2 (342). That is, in the feeding port 1 (341), the first connection part (341a) is connected to the first connection part (342a) of the feeding port 2 (342), and from the first connection part (342a) of the feeding port 2 (342) in the other direction can be extended In addition, in the feeding port 1 341 , the second connection part 341b may be connected to the first connection part 341a and may extend from the first connection part 341a in one direction. Here, the second connection part 341b may be connected to the first feed line 331 .

On the other hand, on the other side of the feeding point 320, the feeding port 5 (345), the feeding port 6 (346), the feeding port 7 (347) and the feeding port 8 (348) may be disposed. The feeding port 5 345 may include a first connection part 345a and a second connection part 345b. And the feeding port 6 (346) may include a first connection portion (346a) and a second connection portion (346b). In addition, the feed port 7 (347) may include a first connection portion (347a), a second connection portion (347b), and a branch portion (347c). In addition, the feed port 8 ( 348 ) may include a first connection portion ( 348a ) and a second connection portion ( 348b ). Here, along the other direction from the feeding point 320, the feeding port 5 (345), the feeding port 6 (346), the feeding port 7 (347) and the feeding port 8 (348) may be arranged in the order.

Specifically, the feeding port 5 (345) may be connected to the feeding point (320). That is, in the feeding port 5 345 , the first connection part 345a may be connected to the feeding point 320 and may extend in the other direction from the feeding point 320 . In addition, in the feeding port 5 345 , the second connection part 345b may be connected to the first connection part 345a and may extend from the first connection part 345a in one direction. Here, the second connection part 345b may be connected to the feed line 5 (335).

And feed port 6 (346) may be connected to the feed port 5 (345). That is, in the feeding port 6 (346), the first connection portion (346a) is connected to the first connection portion (345a) of the feeding port 5 (345), from the first connection portion (345a) of the feeding port 5 (345) in the other direction can be extended In addition, in the feeding port 6 346 , the second connection part 346b may be connected to the first connection part 346a and may extend from the first connection part 346a in one direction. Here, the second connection part 346b may be connected to the feed line 6 (336).

Feed port 7 (347) may also be connected to feed port 6 (346). That is, in the feeding port 7 (347), the first connection portion (347a) is connected to the first connection portion (346a) of the feeding port 6 (346), from the first connection portion (346a) of the feeding port 6 (346) in the other direction can be extended And in the feeding port 7 (347), the second connection portion (347b) is connected to the first connection portion (347a), it may extend from the first connection portion (347a) in one direction. Here, the second connection part 347b may be connected to the feed line 7 (337).

In addition, in the feeding port 7 (347), the branch portion (347c) is connected to the second connection portion (347b), it may extend from the second connection portion (347b) in a vertical direction in one direction.

Additionally, feed port 8 (348) may be connected to feed port 7 (347). That is, in the feeding port 8 (348), the first connection portion (348a) is connected to the first connection portion (347b) of the feeding port 7 (347), from the first connection portion (347b) of the feeding port 7 (347) in the other direction can be extended In addition, in the feeding port 8 (348), the second connection portion 348b may be connected to the first connection portion 348a, and may extend from the first connection portion 348a in one direction. Here, the second connection part 348b may be connected to the eighth feed line 338 .

Specifically, the branch portion 347c includes a first connection point (B) and a second connection point (C). In addition, the first connection point (B) is connected to the feeding port 7 (347), and the second connection point (C) is connected to the feeding port 8 (348).

In addition, a portion of the signal supplied to the feed line 7 (337) through the first connection point (B) is branched by the branch unit 347c and supplied to the feed line 8 (338).

In addition, a part of the signal supplied through the first connection part 348a of the feeding port 8 (348) is branched from the second connection point (C) and supplied to the feeding line 7 (337).

In other words, the branch unit 347c causes a portion of the signal supplied to the feed line 8 (338) to be branched through the second connection point (C) as described above, and accordingly, by the size of the branched signal The magnitude of the signal supplied to the feed line 8 (338) is reduced.

On the other hand, the phase of the signal supplied to the first connection point (B) is such that the inverted phase of the signal supplied to the second connection point (C). In other words, the phase of the power applied to the first connection point (B) is inversely related to the phase of the power applied to the second connection point (C).

Accordingly, the signal supplied to the second connection point C through the first connection point B has an inverse relationship with each other, thereby further reducing the magnitude of the signal supplied through the feed line 1 231 . can

To this end, the branch portion 347c includes a branch line interconnecting the first connection point B and the second connection point C, and accordingly, the feeding line 7 (337) through the feeding port 7 (347). ), a part of the signal supplied to the eighth feed line 338 is supplied, and a part of the signal supplied to the feed line 8 (338) through the feed port 8 (348) is transferred to the seventh feed line 337 ) is supplied.

On the other hand, the branch portions 342c and 347c as described above are disposed on a power supply line requiring fine power distribution. Preferably, the branch portions 342c and 347c are connected to the first and eighth feed lines furthest from the feeding point, and the second and seventh feed lines having one end directly connected to the first and eighth feeding lines. .

According to the embodiment of the present invention as described above, by adding a branch line to the port to which excessive power is allocated, only necessary power is transmitted to the corresponding port, and the remaining power is separated into other ports through the separation line, so that 0.1 or less It is possible to distribute the fine power of , and accordingly, the beam width can be enlarged by filling the null section of the main lobe and the side lobe of the antenna.

In addition, according to an embodiment of the present invention, various detection distances may be implemented in one antenna device, and through this, the radar system may be provided with one antenna device to secure a desired detection range. In other words, the detection range of the radar system can be expanded without increasing the size of the radar system. Accordingly, the performance of the radar system may be improved. Furthermore, the manufacturing cost of the radar system can be reduced.

The radiators 350 radiate signals from the antenna device 200 . At this time, the radiators 350 are connected to the power feeding unit 310 . Here, the radiators 350 are dispersedly disposed in the power supply line 330 . Through this, a signal is supplied from the power supply unit 310 to the radiators 350 . And the radiators 350 are made of a conductive material. Here, the radiators 350 may include at least one of silver (Ag), palladium (Pd), platinum (Pt), copper (Gu), gold (Au), and nickel (Ni).

In addition, weights are individually preset to the radiators 350 . That is, a unique weight is set for each radiator 350 . In this case, in response to each radiator 350 , the weight is set as a value for impedance matching by acquiring the resonance frequency, radiation coefficient, beam width, and detection distance of the corresponding radiator 350 . Here, in response to each radiator 350 , a weight may be calculated according to a Taylor function or a Chebyshev function. In addition, with respect to the radiators 350 , the weights are set to be symmetrical with respect to the center point of the power feeding unit 310 . Through this, the weight is set differently according to the positions of the radiators 350 .

In addition, each radiator 350 is formed with a variable determined according to each weight. In this case, the variable of the radiator 350 may determine the size of the radiator 350 and the shape of the radiator 350 . These radiators 350 include a connection part 351 and a radiation part 353 . Here, the variables of the radiator 350 include the length of the radiation part 353 and the width of the radiation part 353 .

The connection part 351 is connected to the power feeding part 310 . At this time, the connection part 351 is connected to the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 . Here, the connection part 351 is connected to the power supply part 310 through one end. And the connection part 351 is extended from the power feeding part 310 . At this time, the connecting portion 351 extends in a direction different from the extending direction of the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 . Here, the connecting portion 351 extends through the other end. Through this, a signal is transmitted from the feed lines 331 , 332 , 333 , 334 , 335 , 336 , 337 and 338 to the connection part 351 .

The radiation part 353 is connected to the connection part 351 . At this time, the radiation part 353 is connected to the other end of the connection part 351 . Here, the radiation part 353 is connected to the connection part 351 through one end. And the radiation part 353 extends from the connection part 351 . At this time, the radiation part 353 extends along the extending direction of the connection part 351 . Here, the radiating part 353 extends through the other end. In addition, the other end of the radiating part 353 is open (open). Through this, a signal is transmitted from the connection part 351 to the radiation part 353 . In this case, the length of the radiating part 353 and the width w1 of the radiating part 353 may be defined. Here, the length of the radiating part 353 may correspond to the extending direction of the radiating part 353 , and the width of the radiating part 353 may correspond to the direction perpendicular to the extending direction of the radiating part 353 .

7 is a plan view illustrating a power feeding unit of an antenna device according to a third embodiment of the present invention.

Referring to FIG. 7 , in the antenna device of the present embodiment, except for the power feeding unit 410 , the configuration is similar to the corresponding configuration of the above-described embodiment, and thus a detailed description thereof will be omitted. However, the antenna device of the present embodiment includes a power feeding unit 410 . At this time, in the feeding unit 410 , a feeding point 420 is defined. That is, the feeding unit 410 receives a signal through the feeding point 420 . In addition, the power feeding unit 410 includes a feeding line unit 430 and a distribution unit 440 .

The feed line unit 430 includes a plurality of feed lines 431 , 432 , 433 , 434 , 435 , 436 , 437 and 438 . At this time, the feed lines 431 , 432 , 433 , 434 , 435 , 436 , 437 and 438 extend in one direction. And the feed lines (431, 432, 433, 434, 435, 436, 437, and 438) are arranged parallel to each other in the other direction.

The distribution unit 440 supplies a signal from the feeding point 420 to the feeding line unit 430 . At this time, the distribution unit 440 distributes the signal to the power supply line unit 430 . This distribution unit 440 includes a plurality of feed ports (441, 442, 443, 444, 445, 446, 447 and 448). At this time, the feed ports (441, 442, 443, 444, 445, 446, 447, and 448) are arranged in parallel with each other in the other direction. At this time, the feeding ports (441, 442, 443, 444, 445, 446, 447 and 448) are sequentially connected. Through this, in the feed ports (441, 442, 443, 444, 445, 446, 447 and 448), the signal is transmitted sequentially.

For example, the distribution unit 440 may include eight feed ports 441 , 442 , 443 , 444 , 445 , 446 , 447 and 448 . And the feeding ports (441, 442, 443, 444, 445, 446, 447, and 448) may be arranged side by side in the transverse axis. Here, the feed ports 441 , 442 , 443 , 444 , 445 , 446 , 447 and 448 are, along the transverse axis, the feed port 1 441 , the feed port 2 442 , the feed port 3 443 , and the feed port 4 444 , feed port 5 445 , feed port 6 446 , feed port 7 447 , and feed port 8 448 . Also, feeding ports 441 , 442 , 443 , 444 , 445 , 446 , 447 and 448 may be divided around the feeding point 420 .

In this case, a feeding port 1 441 , a feeding port 2 442 , a feeding port 3 443 , and a feeding port 4 444 may be disposed on one side of the feeding point 420 . The feeding port 1 441 may include a first connection part 441a and a second connection part 441b.

In addition, a slit 441c recessed inwardly is formed in the second connection part 441b. At this time, the slit 441c has one end connected to the branching part as described above, and thus mismatching the signal transmitted through the branching part is performed, and the feed line 1 through the second connection part 441b. Decrease the magnitude of the signal supplied to (431).

In addition, when the signal supplied through the feed line 1 (431) is reflected and supplied to the branch unit, the slit 441c blocks the flow of the reversely supplied signal, which is generated by the reverse supply of the signal. Reduce noise.

In addition, the feeding port 2 442 may include a first connection part 442a and a second connection part 442b. Also, the feeding port 3 443 may include a first connection part 443a and a second connection part 443b. In addition, the feed port 4 444 may include a first connection portion 444a and a second connection portion 444b. Here, in the reverse direction from the feeding point 420 to the other direction, the feeding port 4 444 , the feeding port 3 443 , the feeding port 2 442 , and the feeding port 1 441 may be arranged in the order.

Specifically, the feeding port 4 444 may be connected to the feeding point 220 . That is, in the feeding port 4 444 , the first connection part 444a may be connected to the feeding point 220 , and may extend from the feeding point 220 in the other direction. In addition, in the feeding port 4 444 , the second connection part 444b may be connected to the first connection part 444a and may extend from the first connection part 444a in one direction.

And the feeding port 3 (443) may be connected to the feeding port 4 (444). That is, in the feed port 3 (443), the first connection portion (443a) is connected to the first connection portion (444a) of the feeding port 4 (444), from the first connection portion (444a) of the feeding port 4 (444) in the other direction can be extended Also, in the feeding port 3 443 , the second connection part 443b may be connected to the first connection part 443a and may extend from the first connection part 443a in one direction.

Also, the feed port 2 (442) may be connected to the feed port 3 (443). That is, in the feeding port 2 442 , the first connection part 442a is connected to the first connection part 443a of the feeding port 3 443 , and from the first connection part 443a of the feeding port 3 443 in the other direction. can be extended In addition, in the feeding port 2 442 , the second connection part 442b may be connected to the first connection part 442a and may extend from the first connection part 442a in one direction.

In addition, the feeding port 1 ( 441 ) may be connected to the feeding port 2 ( 442 ). That is, in the feeding port 1 441 , in the feeding port 1 441 , the first connection part 441b is connected to the first connection part 442a of the feeding port 2 442 , and the first of the feeding port 2 442 . It may extend in another direction from the connection part 442a. In addition, in the feeding port 1 441 , the second connection part 441b may be connected to the first connection part 441a and may extend from the first connection part 441a in one direction.

Meanwhile, a feeding port 5 ( 445 ), a feeding port 6 ( 446 ), a feeding port 7 ( 447 ), and a feeding port 8 ( 448 ) may be disposed on the other side of the feeding point 420 . The feeding port 5 (445) may include a first connection part (445a) and a second connection part (445b). In addition, the feeding port 6 (446) may include a first connection part (446a) and a second connection part (446b). In addition, the feed port 7 447 may include a first connection part 447a , a second connection part 447b , and a third connection part 447c . In addition, the feed port 8 ( 448 ) may include a first connection portion ( 448a ) and a second connection portion ( 448b ). Here, along the other direction from the feeding point 420, the feeding port 5 (445), the feeding port 6 (446), the feeding port 7 (447), and the feeding port 8 (448) may be arranged in the order.

Specifically, the feeding port 5 ( 445 ) may be connected to the feeding point ( 220 ). That is, in the feeding port 5 ( 445 ), the first connection part ( 445a ) may be connected to the feeding point ( 220 ), and may extend from the feeding point ( 220 ) in another direction. In addition, in the feeding port 5 ( 445 ), the second connection part ( 445b ) may be connected to the first connection part ( 445a ) and may extend from the first connection part ( 445a ) in one direction.

And feed port 6 (446) may be connected to the feed port 5 (445). That is, in the feeding port 6 (446), the first connection part (446a) is connected to the first connection part (445a) of the feeding port 5 (445), and from the first connection part (445a) of the feeding port 5 (445) in the other direction can be extended Also, in the feeding port 6 (446), the second connection part 446b may be connected to the first connection part 446a and may extend from the first connection part 446a in one direction.

Feed port 7 (447) may also be connected to feed port 6 (446). That is, in the feed port 7 (447), the first connection portion (447a) is connected to the first connection portion (446a) of the feeding port 6 (446), from the first connection portion (446a) of the feeding port 6 (446) in the other direction can be extended In addition, in the feeding port 7 447 , the second connection part 447b may be connected to the first connection part 447a and may extend from the first connection part 447a in one direction.

Additionally, feed port 8 ( 448 ) may be connected to feed port 7 ( 447 ). That is, in the feed port 8 (448), in the feed port 8 (448), the first connection portion (448a) is connected to the first connection portion (447a) of the feed port 7 (447), the first of the feed port 7 (447) It may extend in another direction from the connection part 447a. And in the feeding port 8 (448), the second connection portion (448b) may be connected to the first connection portion (448a), extending from the first connection portion (448a) in one direction.

Meanwhile, the slit may be additionally formed in the second connection part 448b.

According to the antenna device 200 of the present invention, the distribution unit 240; 340; 440 is a feed port 241, 242, 243, 244, 245, 246, 247 and 248; 341, 342, 343, 344, 345, 346, 347 and 348; 441, 442, 443, 444, 445, 446, 447, and 448), and distribute the signal with the same intensity. That is, the distribution unit 240 includes the feed lines 231, 232, 233, 234, 235, 236, 237 and 238; 331, 332, 333, 334, 335, 336, 337 and 338; 431, 432, 433, 434; 435, 436, 437 and 438), distribute the signal through fine scaling. These are the feed ports 241, 242, 243, 244, 245, 246, 247 and 248; 341, 342, 343, 344, 345, 346, 347 and 348; 441, 442, 443, 444, 445, 446, 447. and 448 , at least some of which include branch portions 242c and 247c; 342c and 347c or slits 441c and 448c. At this time, in a position where the fine distribution of the signal is not made efficiently, the feeding ports 241, 242, 243, 244, 245, 246, 247 and 248; 341, 342, 343, 344, 345, 346, 347 and 348; At least some of 441 , 442 , 443 , 444 , 445 , 446 , 447 and 448 may include branch portions 242c , 247c ; 342c , 347c , and slits 441c and 448c . This allows the feed ports 241, 242, 243, 244, 245, 246, 247 and 248; 341, 342, 343, 344, 345, 346, 347 and 348; 441, 442, 443, 444, 445, 446; Between 447 and 448, fine signal distribution can be made more efficiently.

8 and 9 are diagrams for explaining the operating characteristics of an antenna device according to an embodiment of the present invention. At this time, FIG. 8 is a graph for explaining a gain for each sensing angle of the antenna device according to an embodiment of the present invention. Here, the gain represents a degree of concentration and radiation of a signal in response to a desired direction in the antenna device. In the following description, the main lobe indicates a direction in which a signal is concentrated and radiated from the antenna device, and the side lobe indicates another direction in which the signal is finely radiated from the antenna device except for the main lobe. And FIG. 9 is an exemplary view for explaining a beam width of an antenna device according to an embodiment of the present invention.

Referring to FIG. 8 , a typical antenna device 100 has a plurality of minor lobes in addition to a main lobe. Due to this, a null section is formed between -20 degree and 20 degree. In addition, the general antenna device 100 has a certain detection distance. Accordingly, a general radar system must include a plurality of antenna devices 100 as shown in FIG. 9( b ) in order to secure a desired detection range and detection distance.

In contrast, in the antenna device 200 according to the present invention, a null section is filled between -60 degrees and 60 degrees, and the side lobe is suppressed. Through this, the performance of the antenna device 200 according to the embodiment of the present invention is improved, so that the antenna device 200 has a larger sensing angle, that is, a larger main lobe. In other words, the antenna device 200 according to the present invention has a wider beam width. In addition, the antenna device 200 according to the present invention has various detection distances. Accordingly, the radar system according to the embodiment of the present invention. As shown in (a) of FIG. 9 , a desired detection range may be secured by providing one antenna device 200 .

According to the present invention, feed ports 241, 242, 243, 244, 245, 246, 247 and 248; 341, 342, 343, 344, 345, 346, 347 and 348; 441, 442, 443, 444, 445; As signals are finely distributed in response to 446 , 447 and 448 , the performance of the radiators 250 may be further improved.

10 is a perspective view illustrating a vehicle radar device according to an embodiment of the present invention. Referring to FIG. 10 , the vehicle radar device 1000 includes a radome 500 , a waterproof ring 550 , a shielding unit 600 , a printed circuit board (PCB, 650 ), a bracket; 700 ), an auxiliary printed circuit board 750 , a case 800 , and a connector 850 .

The radome 500 may accommodate the printed circuit board 650 to protect the printed circuit board 650 , and the radome 500 may be coupled to the case 800 . The radome 500 may be made of a material having less attenuation of radio waves, and may be an electrical insulator.

The waterproof ring 550 is disposed between the radome 500 and the case 800 to prevent submersion of the vehicle radar device 1000 . For example, the waterproof ring 550 may be formed of an elastic material.

The shielding unit 600 may shield the RF signal generated from the IC chip of the printed circuit board 650 . To this end, the shielding unit 160 may be formed in a region corresponding to the IC chip of the printed circuit board 150 .

The printed circuit board 650 may have a radar module including an antenna unit and a signal processing unit mounted thereon. The antenna unit may include a plurality of wide-angle antennas arranged in a line, but is not limited thereto. The signal processing unit may be a millimeter wave radio frequency IC (RFIC), but is not limited thereto.

The bracket 700 may block noise generated during the signal processing process of the printed circuit board 650 .

The protection printed circuit board 750 may be equipped with circuits for power and signal processing, but is not limited thereto.

The case 800 may accommodate the connector 850 , the auxiliary printed circuit board 750 , the bracket 700 , the printed circuit board 650 , and the shielding unit 600 .

The connector 850 may transmit/receive a signal between the vehicle radar device 1000 and an external device. For example, the connector 850 may be a controller area network (CAN) connector, but is not limited thereto.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the embodiments.

In the above, the embodiment has been mainly described, but this is only an example and does not limit the embodiment, and those of ordinary skill in the art to which the embodiment belongs are provided with several examples not illustrated above within the range that does not deviate from the essential characteristics of the embodiment. It can be seen that variations and applications of branches are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the embodiments set forth in the appended claims.

100, 200: antenna device
110, 210, 310, 410: feeding unit
120, 220, 320, 420: feeding point
130, 230, 330, 430: feed line part
140, 240, 340, 440: distribution unit

Claims (20)

In the antenna device of a radar system,
a plurality of emitters; and
and a feeding unit connected to the plurality of radiators;
The power supply unit,
a plurality of feed lines respectively connected to the plurality of radiators and extending in a first direction;
and a feeding unit including a distribution unit including a plurality of feeding ports for distributing a signal received from a feeding point to the plurality of feeding lines, respectively,
Each of the plurality of feeding ports,
a first connection part connected to the feeding point and extending in a second direction perpendicular to the first direction;
and a second connection part extending in the first direction from the first connection part and connected to the feed line,
The first connection portion of each of the plurality of feeding ports is directly connected to the first connection portion of the neighboring feeding port,
The plurality of power feeding ports,
a first feeding port farthest from the feeding point in the second direction and connected to a first feeding line;
It is disposed adjacent to the first feed port and comprises a second feed port connected to a second feed line,
The distribution unit,
A first connection point at one end spaced apart from the first connection part of the first feeding port and the first connection part of the second feeding port in the first direction and connected to the first connection part of the first feeding port; and a branching portion including a branching line having a second connection point of the other end connected to the second connection portion of the feeding port,
The branch is
Transmitting the signal supplied to the first feed line to the second feed line,
Transmitting a signal supplied to the second feed line to the first feed line,
antenna device. The method of claim 1,
The plurality of feed lines are,
extending in the first direction, spaced apart from each other in the second direction perpendicular to the first direction, and arranged side by side
antenna device. 3. The method of claim 2,
The first connection portion of the plurality of feeding ports
sequentially connected to each other along the second direction
antenna device. The method of claim 1,
The branch is
disposed parallel to the first connection portion of the plurality of feeding ports
antenna device. The method of claim 1,
The branch is
It is disposed with a predetermined inclination with the first connection portion of the plurality of feeding ports,
The length between one end of the second connection part of the first feeding port from the first connection point is,
different from the length between one end of the second connection part of the second feeding port from the second connection point,
antenna device. delete delete The method of claim 1,
The phase of the signal supplied to the first connection point is,
the same as the phase of the signal supplied to the second connection point
antenna device. The method of claim 1,
The phase of the signal supplied to the first connection point is,
having an inverted phase of the signal supplied to the second connection point
antenna device. The method of claim 1,
In the second connection portion of the first feed port,
A slit recessed inwardly adjacent to the first connection point and away from the second feeding port is formed.
antenna device. In the antenna device of a radar system,
a plurality of emitters; and
and a feeding unit connected to the plurality of radiators;
The power supply unit,
a plurality of feed lines respectively connected to the plurality of radiators and extending in a first direction;
and a feeding unit including a distribution unit including a plurality of feeding ports for distributing a signal received from a feeding point to the plurality of feeding lines, respectively,
Each of the plurality of feeding ports,
a first connection part connected to the feeding point and extending in a second direction perpendicular to the first direction;
and a second connection part extending in the first direction from the first connection part and connected to the feed line,
The first connection portion of each of the plurality of feeding ports is directly connected to the first connection portion of the neighboring feeding port,
The plurality of power feeding ports,
a first feeding port farthest from the feeding point in the second direction and connected to a first feeding line;
It is disposed adjacent to the first feed port and comprises a second feed port connected to a second feed line,
The distribution unit,
A first connection point at one end spaced apart from the first connection part of the first feeding port and the first connection part of the second feeding port in the first direction and connected to the first connection part of the first feeding port; and a branching portion including a branching line having a second connection point of the other end connected to the second connection portion of the feeding port,
The branch is
Transmitting the signal supplied to the first feed line to the second feed line,
Transmitting the signal supplied to the second feed line to the first feed line,
In the second connection portion of the first feed port,
A slit recessed inwardly adjacent to the first connection point and away from the second feeding port is formed,
antenna device. 12. The method of claim 11,
The plurality of feed lines are,
extending in the first direction, spaced apart from each other in the second direction perpendicular to the first direction, and arranged side by side;
The first connection portion of the plurality of feeding ports
sequentially connected to each other along the second direction
antenna device. 13. The method of claim 12,
The branch is
disposed parallel to the first connection portion of the plurality of feeding ports
antenna device. 13. The method of claim 12,
The branch is
It is disposed with a predetermined inclination with the first connection portion of the plurality of feeding ports,
The length between one end of the second connection part of the first feeding port from the first connection point is,
different from the length between one end of the second connection part of the second feeding port from the second connection point
antenna device. delete 13. The method of claim 12,
The phase of the signal supplied to the first connection point is,
the same as the phase of the signal supplied to the second connection point
antenna device. 13. The method of claim 12,
The phase of the signal supplied to the first connection point is,
having an inverted phase of the signal supplied to the second connection point
antenna device. case;
and a printed circuit board accommodated in the case and including an antenna device,
The antenna device,
a plurality of emitters; and
and a feeding unit connected to the plurality of radiators;
The power supply unit,
a plurality of feed lines respectively connected to the plurality of radiators and extending in a first direction;
and a feeding unit including a distribution unit including a plurality of feeding ports for distributing a signal received from a feeding point to the plurality of feeding lines, respectively,
Each of the plurality of feeding ports,
a first connection part connected to the feeding point and extending in a second direction perpendicular to the first direction;
and a second connection part extending in the first direction from the first connection part and connected to the feed line,
The first connection portion of each of the plurality of feeding ports is directly connected to the first connection portion of the neighboring feeding port,
The plurality of power feeding ports,
a first feeding port farthest from the feeding point in the second direction and connected to a first feeding line;
It is disposed adjacent to the first feed port and comprises a second feed port connected to a second feed line,
The distribution unit,
A first connection point at one end spaced apart from the first connection part of the first feeding port and the first connection part of the second feeding port in the first direction and connected to the first connection part of the first feeding port; and a branching portion including a branching line having a second connection point of the other end connected to the second connection portion of the feeding port,
The branch is
Transmitting the signal supplied to the first feed line to the second feed line,
Transmitting a signal supplied to the second feed line to the first feed line,
In the second connection portion of the first feed port,
A slit recessed inwardly adjacent to the first connection point and away from the second feeding port is formed,
The branch is
It is disposed with a predetermined inclination with the first connection portion of the plurality of feeding ports,
The length between one end of the second connection part of the first feeding port from the first connection point is,
different from the length between one end of the second connection part of the second feeding port from the second connection point,
Vehicle radar device. delete delete

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