ASYMMETRIC WIDE-ANGLE RADAR MODULE

Abstract

An asymmetric wide-angle radar module according to an embodiment of the present invention includes: a first antenna unit with M (M: a positive integer) antenna structures of a first array in each of which L (L: a positive integer) antennas of the first array including A (A: a positive integer) radiating elements are arranged side by side: a second antenna unit with N (N: a positive integer) second array antennas comprising B (B: a positive integer) radiating elements; M first feed units supplying a feed signal to the first antenna unit; N second feed units supplying, a feed signal to the second antenna unit; and M first feed, lines connecting between the first feed unit and the one end of the first array antenna structure in the asymmetric wide-angle radar module.

Claims

1. An asymmetric wide-angle radar module comprising: a first antenna unit comprising M (M: a positive integer) first array antenna structures arranged side by side, each of which comprises L (L: a positive integer) first array antennas, each of which is composed of A (A: a positive integer) radiating elements; a second antenna unit comprising N (N: a positive integer) second array antennas, each of which is composed of B (B: a positive integer) radiating elements; M first feed units supplying the feed signal to the first antenna unit; N second feed units supplying the feed signal to the second antenna unit; and M first feed lines connecting to the first feed unit and the one end of the first array antenna structure.

2. The asymmetric wide-angle radar module according to claim 1, wherein the spacing of each of the N second array antennas is 0.5.

3. The asymmetric wide-angle radar module according to claim 1, wherein the spacing of each of the M first array antennas is N*0.5 or lower.

4. The asymmetric wide-angle radar module according to claim 1, wherein the spacing between each of the L first array antennas is 0.5-1.0.

5. The asymmetric wide-angle radar module according to claim 1, wherein the first feed line comprises; a 1-1 feed line placed on the left of the branch point at the other end of the first feed unit; and a 1-2 feed line placed on the right side of the branch point at the other end of the first feed unit.

6. The asymmetric wide-angle radar module according to claim 5, wherein when the lengths of the 1-1 feed line and the 1-2 feed line are the same, the phases of the feed signals supplied to the 1-1 feed line and the 1-2 feed line become same.

7. The asymmetric wide-angle radar module according to claim 5, wherein when the lengths of the 1-1 feed line and the 1-2 feed line are different and L is 2, the feed signals supplied to the 1-1 feed line and the 1-2 feed line come to have a phase difference corresponding to the difference in lengths of the 1-1 feed line and the 1-2 feed line.

8. The asymmetric wide-angle radar module according to claim 5, wherein: when L is 3 or more, and only one first array antenna is placed at the other end of the 1-1 feed line, and the 1-2 feed line comprises the 1-2-1 feed line lying between the branch point and the first array antenna placed closest to the branch point on its right; and when the lengths of the 1-1 feed line and the 1-2-1 feed line are different, the feed signals supplied to the 1-1 feed line and the 1-2-1 feed line indicate a phase difference corresponding to the difference in lengths of the 1-1 feed line and the 1-2-1 feed line.

9. The asymmetric wide-angle radar module according to claim 8, wherein: the 1-2 feeding line further comprises the K-1 1-2-2 feed lines lying between K (K: a positive integer) first array antennas disposed on the right of the first array antenna which is closest to the branch point, and when the lengths of the 1-1 feed line and the 1-2-1 feed line are different, the lengths of each of the K-1 1-2-2 feed lines are the sum of and the half of the length differences between the 1-1 feed line and the 1-2-1 feed line.

10. The asymmetric wide-angle radar module according to claim 5, wherein when the thickness of the first length of the 1-1 feed line in the direction to the branch point is the same as the thickness of the first length of the 1-2 feed line in the direction to the branch point, the power level of the feed signal supplied to the 1-1 feed line becomes the same as that of the feed signal supplied to the 1-2 feed line.

11. The asymmetric wide-angle radar module according to claim 5, wherein when the thickness of the first length of the 1-1 feed line in the direction to the branch point is different from the thickness of the first length of the 1-2 feed line in the direction to the branch point and the L is 2, the power level of the feed signal supplied to the 1-1 feed line becomes different from that of the feed signal supplied to the 1-2 feed line.

12. The asymmetric wide-angle radar module according to claim 11, wherein the thickness of the first length placed in the direction to the branch point in the first feed unit can be adjusted to achieve the impedance match.

13. The asymmetric wide-angle radar module according to claim 5, wherein: the L is 3 or more, and only one first array antenna is placed at the other end of the 1-1 feed line; the 1-2 feeding line comprises the 1-2-1 feed line lying between the branch point and the first array antenna disposed closest to the branch point on its right; and when the thickness of the first length of the 1-1 feed line in the direction to the branch point is different from that of the first length of the 1-2-1 feed line in the direction to the branch point, the power level of the feed signal supplied to the 1-1 feed line becomes different from that of the feed signal supplied to the 1-2-1 feed line.

14. The asymmetric wide-angle radar module according to claim 13, wherein: the 1-2 feed line further comprises the K-1 1-2-2 feed lines lying between K (K: a positive integer) first array antennas disposed on the right of the first array antenna which is closest to the branch point; the power level of the feed signal supplied to each of the K-1 1-2-2 feed lines is determined using the thickness of the feed line connected to the input end of the first array antenna in the direction to the branch point on the relevant 1-2-2 feed line and the thickness of the first length on the right of the feed line connected to the input end of the first array antenna on the relevant 1-2-2 feed lines.

15. The asymmetric wide-angle radar module according to claim 10, wherein the first length is /4.

16. The asymmetric wide-angle radar module according to claim 1, wherein when the first antenna unit is a transmission channel antenna unit, the second antenna unit becomes a reception channel antenna unit.

17. The asymmetric wide-angle radar module according to claim 1, wherein when the first antenna unit is a reception channel antenna unit, the second antenna unit becomes a transmission channel antenna unit.

18.-22. (canceled)

23. The asymmetric wide-angle radar module according to claim 11, wherein the first length is /4.

24. The asymmetric wide-angle radar module according to claim 12, wherein the first length is /4.

25. The asymmetric wide-angle radar module according to claim 13, wherein the first length is /4.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG. 1 is a diagram illustrating a configuration of the asymmetric wide-angle radar module according to an embodiment of the present invention.

[0036] FIG. 2 is an exemplary diagram showing a first antenna unit.

[0037] FIG. 3 is a diagram showing a radiation pattern in the case that the first antenna unit is 10 by 2(102).

[0038] FIG. 4 is a diagram showing a second antenna unit.

[0039] FIG. 5 is a diagram illustrating the radiation pattern in the case that the second antenna unit is 101.

[0040] FIGS. 6 to 8 are the exemplary illustrations in which a phase difference of the power feed signal is adjusted.

[0041] FIGS. 9 to 11 are the exemplary illustrations in which the power level of a feed signal is adjusted.

[0042] FIG. 12 is a diagram illustrating a radiation pattern of the asymmetric wide-angle radar module itself according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0043] Hereinafter, some preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, as well as methods for achieving them, will get clear with the embodiments described below and the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. The present embodiments just make the disclosure of the present invention complete, and inform those with common knowledge in the relevant field of the complete range of present invention. The present invention is only defined by the scope of the claims. The same reference numbers are used for the same elements throughout the specification.

[0044] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may have meanings commonly understood by ordinary technicians in the field to which the present invention belongs. In addition, the terms defined in commonly used dictionaries are not interpreted oddly or excessively unless specifically defined as such. The terms in this specification are for describing embodiments and are not intended to limit the present invention. In this specification, singular forms may also include plural forms unless specifically stated otherwise in the phrase.

[0045] The term comprises and/or comprising in this specification does not exclude the existence or additions of one or more components, steps, operations, and/or elements other than the stated component, step, operation, and/or element.

[0046] FIG. 1 is a diagram showing the configuration of the asymmetric wide-angle radar module (100) according to an embodiment of the present invention.

[0047] The multi-mode radar module (100) according to an embodiment of the present invention comprises the first antenna unit (10), the second antenna unit (20), the first feed unit (30), a second feed unit (40) and the first feed line (50), in addition to which the module may surely comprise typical components required in achieving the object of the present invention.

[0048] The first antenna unit (10) comprises M (M: a positive integer) first array antenna structures (I) in which L (L: a positive integer) first array antennas (15) with A (A: a positive integer) radiating elements are arranged side by side. M (M is a positive integer) are arranged.

[0049] In FIG. 2 showing an example of the first antenna unit (10), one first array antenna structure (I) itself is a AL array antenna (A radiating element in the elevation direction and L radiating elements in the azimuth direction). The fact that L first array antenna elements (15) are arranged side by side means that the individual first array elements (15) are arranged in parallel with each other. More specifically, the spacing between each of the first array elements (15) arranged parallel is 0.51.0, which is an array spacing in the azimuth direction.

[0050] The first antenna unit (10) can be seen as a structure in which an array antenna element of A1 is arranged as many as L in the azimuth direction. Therefore, when feeding L array elements of A1 in the azimuth direction, the maximum aiming direction may be controlled through the phase difference of the feed signals, and the flatness of the radiation pattern be controlled by adjusting the power level of the feed signals.

[0051] On the other hand, in relation to the arrangement of the first array antenna structures (I), the spacing between each of the M first array antenna structures (I) is related to N (N: a positive integer), which is the number of second array antennas to be described later. More specifically, the spacing is N*0.5 or less, which is to operate it as a MIMO radar system together with the second antenna unit (20) to be described later.

[0052] The first array antenna structure (I) has no special or independent meaning in its name but was arbitrarily coined in this specification to distinguish a configuration, in which L first array antennas comprising A radiating elements are arranged side by side, from other configurations. It can be regarded just as a set of L first array antennas, one end of which is connected to the first feed line (50) to be described later.

[0053] FIG. 3 exemplarily shows a radiation pattern with the first antenna unit (10) of array, where the left radiation pattern and the right radiation pattern are different from each other with respect to 0, and at the same time, the maximum aiming direction is clearly asymmetric. The principle of this radiation pattern can be explained based on two A1 array antennas as follows: the maximum aiming direction is the straight forward (0) when the phase difference of the feed signals is 0; but it becomes 90 with the phase difference of 180; so the maximum aiming direction comes to be between 0 and 90 because the phase difference must have a value between 0 and 180.

[0054] Based on this principle, the asymmetric wide-angle radar module (100) according to an embodiment of the present invention adjusts the phase difference of the feed signals supplied to the first antenna unit (10) so as to freely control the maximum directing direction on the asymmetric radiation pattern as the designer has intended, which will be described later.

[0055] In the second antenna unit (20), N second array antennas (25) comprising B (B: a positive integer) radiating elements.

[0056] FIG. 4 shows an example of the second antenna unit (20), which does not require a second array antenna structure, unlike the first antenna unit (10), because the second antenna unit (20) has N second array antennas arranged independently to each other. Therefore, it can be regarded as a B1 array antenna, where the number B can be the same as A.

[0057] The beam width of the second antenna unit (20) in the elevation direction can change according to B, which is the number of radiating elements arranged in the elevation direction, but the beam width in the azimuth direction can be formed constant regardless of B because it has just one radiating element in the azimuth direction. Therefore, it has a structure suitable for displaying a wide-angle radiation pattern.

[0058] Meanwhile, the spacing between each of the N second array antennas may be because the detectable angle becomes the widest as 180 when the second array antennas are arranged at 0.5 spacing according to the radar and antenna theory. And the wide-angle effect can be maximized if the second array antennas in the second antenna unit (20) have a symmetrical shape by adjusting N and, at the same time, have a beam width of 150 or more.

[0059] FIG. 5 exemplarily shows a radiation pattern when the second antenna unit (20) is a 101 array, where it mostly shows a relatively uniform and wide-angle radiation pattern between 90 and +90.

[0060] Now, let's go back to the description of FIG. 2.

[0061] The first feed unit (30) supplies the feed signal to the first antenna unit (10), which comprises the M first array antenna structures (I). The first feed unit (30) is also arranged as many as M to supply the feed signal to each of the first array antenna structures (I).

[0062] The second feed unit (40) supplies the feed signal to the second antenna unit (20), which comprises the N second array antennas. The second feed unit (40) is also arranged as many as N to supply the feed signal to each of the second array antennas.

[0063] Such first feed unit (30) and second feed unit (40) can receive the power from the main processor (not illustrated) or the control unit (not illustrated), which is one of the typical components required for achieving the purpose of the asymmetric wide-angle radar module (100) according to an embodiment of the present invention. However, since it corresponds to a known configuration in the radar module field, a detailed description thereof is omitted.

[0064] The first feed line (50) is connected to the first feed unit (30), more specifically, to the branch point(P) placed at the other end of the first feed unit (30), and to one end of the first array antenna structure (I). Since the first antenna unit (10) comprises M first array antenna structures (I), the first feed line (50) is also arranged as many as M to provide the first array antenna structures (I) with the feed signal supplied by the first feed unit (30).

[0065] Meanwhile, the first feed line (50) comprises the 1-1 feed line (50-1) placed on the left side of the branch point(P) at the other end of the first feed unit (30) and the 1-2 feeding line (50-2) placed on the right side of the branch point(P) at the other end of the first feed unit (30). The phase difference of feed signals supplied to the L first array antennas can be controlled by adjusting the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2), And the power level of the feed signal supplied to the L first array antennas can be controlled by adjusting the thickness of the 1-1 feed line (50-1) and the 1-2 feed line (50-2). Through these, the first antenna unit (10) can have characteristics of an asymmetric radiation pattern. Hereinafter, the phase difference adjustment of the feed signal will be described in detail.

[0066] As mentioned above, the phase difference of the feed signals supplied to the L first array antennas can be controlled by adjusting the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2). As shown in FIG. 6, when the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2) are the same, the phases of the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2 feed line (50-2) become the same. If the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2) are the same, the phases of the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2 feed line (50-2) become the same regardless of the number L of the first array antennas. Therefore, all the L first array antennas can be supplied with the feed signals of same phase.

[0067] Meanwhile, as illustrated in FIG. 7, if the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2) are different and the number L of first array antennas is 2, the phases of the feed signals supplied to the 1-1 feed line (50-1) and the 1-2 feed line (50-2) become different, having the phase difference corresponding to the length difference between the 1-1 feed line (50-1) and the 1-2 feed line (50-2).

[0068] In the drawing, when the first feed unit (30) moves from the center to one direction, there happens a phase difference corresponding to twice the distance moved. For example, if a phase difference of 110 needs to be generated, the first feed unit (30) moves from the center to one direction by a distance that the phase change on the feeding line is 55 (55/360*). Then, the phase of the feed signal decreases by 55 at the 1-1 feed line (50-1) where #1 is placed, and increases by 55 at the 1-2 feed line (50-2) where #2 is placed, resulting in the phase difference of 110.

[0069] Here, the distance that the first feed unit (30) moves from the center in one direction can be represented by the length difference between the 1-1 feed line (50-1) and the 1-2 feed line (50-2). For example, when the first feed unit (30) is located at the center and the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2) are 2, if the first feed unit (30) moves by 1 to the #1 direction, the phase difference is generated by 2, corresponding to twice of this. In this case, the length of the 1-1 feed line (50-1) becomes 1 and the length of the 1-2 feed line (50-2) becomes 3, resulting the length difference between the 1-1 feed line (50-1) and the 1-2 feed line (50-2) to be 2. Thus, the distance the first feed unit (30) moves from the center in one direction becomes the half of the length difference between the 1-1 feed line (50-1) and the 1-2 feed line (50-2); in other words, twice the distance the first feed unit (30) moves from the center in one direction becomes the same as the length difference between the 1-1 feed line (50-1) and the 1-2 feed line (50-2). Accordingly, when the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2) are different, there happens a phase difference corresponding to the length difference between them.

[0070] This reflects the situation that the lengths of the 1-1 feed line (50-1) and the 1-2 feed line (50-2), which were the same, becomes different if the first feed unit (30) moves in one direction from the center. As described above, it can also be said that there happens a phase difference corresponding to twice the distance moved by the first feed unit (30).

[0071] Now, let's think about the case where L is 3 or more.

[0072] According to an embodiment in FIG. 8, the number L of the first array antennas is 3 or more, only one first array antenna is arranged at the other end of the 1-1 feed line (50-1), and the 1-2 feed line (50-2) comprises the 1-2-1 feed line (50-2-1) supplying the power to the first array antenna which is arranged closest to the right side of the branch point(P). When the lengths of the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) are different, the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2-1 feed line (50-2-1) come to have the phase difference corresponding to the length difference between the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1).

[0073] FIG. 8 differs from FIG. 7 in that two or more first array antennas are arranged on the 1-2 feed line (50-2) in FIG. 8. Among the first array antennas arranged on the 1-2 feed line (50-2), the first array antenna placed closest to the right side of the branch point(P) along with the 1-2-1 feed line (50-2-1), the 1-1 feed line (50-1) and one first array antenna connected to it can be considered to have the same relations as in FIG. 7. Therefore, as in FIG. 7, if the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) have different lengths, the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2-1 feed line (50-2-1) come to have the phase difference corresponding to the length difference between the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1). Detailed explanations are omitted to prevent redundant description.

[0074] In this case, it becomes important how to arrange the lengths of the 1-2 feed line (50-2) and the other K-1 (K: a positive integer) 1-2-2 feed lines (50-2-2) lying between the nearest first array antenna on the right of branch point(P) and the K first array antennas. It is because the phase difference between feed signals supplied to all first array antennas should be the same.

[0075] When the lengths of the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) are different, each length of K-1 1-2-2 feed lines (50-2-2) should be the sum of and half of the length difference between the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) so as to generate the same phase difference between all pairs of #2 and #3, #3 and #4, and then #K1 and #K as the phase difference between #1 and #2.As described above, the length difference between the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) is twice the distance traveled by the first feed unit (30), and the distance traveled by the first feed unit (30) to generate the phase difference is the half of length difference between the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1). Therefore, only when each length of K-1 1-2-2 feed lines (50-2-2) should include the half of the length difference between the same 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) as such, the phase difference between #1 and #2 can also occur individually in #2 and #3, #3 and #4, and thereafter #K-1 and #K.

[0076] Meanwhile, the reason why each length of K-1 1-2-2 feed lines (50-2-2) should include in addition to the half of the length difference between the 1-1 feed line (50-1) and the 1-2-1 feed line (50-2-1) is that represents 360, giving no effects on the phase and allows the physical space between the first array antennas in the actual implementation.

[0077] Up to now, the adjustment of the phase difference between the feed signals has been described so that the first antenna unit (10) can have the characteristics of an asymmetric radiation pattern in the asymmetric wide-angle radar module (100) according to an embodiment of the present invention. According to the present invention, the phase difference of feed signals supplied to the L first array antennas can be controlled by adjusting the length difference between the 1-1 feed line (50-1) which supplies the feed signal to the first array antenna arranged on the left of the branch point(P) and the 1-2 feed line (50-2) which supplies the feed signal to the first array antenna arranged on the right, or moreover the 1-2-1 feed line (50-2-1) included in the 1-2 feed line (50-2), and the length of the 1-2-2 feed line (50-2-2). In this way, the characteristics of an asymmetric radiation pattern can be effectively implemented as intended by the designer. From now on, the adjustment of the power level that can implement the characteristics of the asymmetric radiation pattern together with the phase difference of the feed signal will be described.

[0078] As mentioned above, the power level of the feed signal supplied to the L first array antennas can be controlled by adjusting the thickness of the 1-1 feed line (50-1) and the 1-2 feed line (50-2). As shown in FIG. 9, when the thickness of the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) is the same as the thickness of the first length (a) in the direction to the branch point(P) on the 1-2 feed line (50-2), the power level of the feed signal supplied to the 1-1 feed line (50-1) becomes the same as that of the feed signal supplied to the 1-2 feed line (50-2). If the thicknesses of the 1-1 feed line (50-1) and the first length (a) in the direction to the branch point(P) on the 1-2 feed line (50-2) are the same, the power levels of the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2 feed line (50-2) become the same regardless of the number L of the first array antennas. Therefore, all the L first array antennas can be supplied with the feed signals of same power level.

[0079] On the other hand, as shown in FIG. 10, when the thickness of the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) is different from that of the first length (a) in the direction to the branch point(P) on the 1-2 feed line (50-2) and the number L of the first array antenna is 2, the power levels of the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2 feed line (50-2) become different from each other.

[0080] Herein, it is rather difficult to express the difference in the power levels, unlike the phase difference of the feed signals, with the constant criteria, such as the thickness difference between the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) and the first length (a) in the direction to the branch point(P) on the 1-2 feed line (50-2). It is because to adjust the thickness of the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) and thickness of the first length (a) in the direction to the branch point(P) on the 1-2 feed line (50-2) in order to supply the feed signals of different power levels to two first array antennas is to adjust their impedance ratio. And furthermore, it becomes to additionally adjust the thickness of the first length (a) in the direction to the branch point(P) on the first feed unit (30) to achieve the impedance matching.

[0081] To put it simply, if the first length (a) gets thicker, the impedance gets lower. In this case, the power level of the feed signal supplied to the corresponding part gets higher. On the other, if the first length (a) gets thinner, the impedance increases, and then the power level of the feed signal supplied to the corresponding part gets lower. It is to utilize the phenomenon in which power is distributed according to the impedance ratio.

[0082] Now, the case where L is 3 or more will be explained.

[0083] As illustrated in FIG. 11, the number L of the first array antennas is 3 or more, only one first array antenna is arranged at the other end of the 1-1 feed line (50-1), and the 1-2 feed line (50-2) comprises the 1-2-1 feed line (50-2-1) supplying the power to the first array antenna which is arranged closest to the right side of the branch point(P). And when the thickness of the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) is different from the thickness of the first length (a) in the direction to the branch point(P) on the 1-2-1 feed line (50-2), the power level of the feed signal onto the 1-1 feed line (50-1) becomes different from the power level of the feed signal onto the 1-2-1 feed line (50-2-1).

[0084] FIG. 11 differs from FIG. 10 in that two or more first array antennas are arranged on the 1-2 feed line (50-2) in FIG. 11. Among the first array antennas arranged on the 1-2 feed line (50-2), the first array antenna placed closest to the right side of the branch point(P) along with the 1-2-1 feed line (50-2-1), the 1-1 feed line (50-1) and one first array antenna connected to it can be considered to have the same relations as in FIG. 10. Therefore, as in FIG. 10, if the thickness of the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) is different from the thickness of the first length (a) in the direction to the branch point(P) on the 1-2-1 feed line (50-2), the feed signals supplied to the 1-1 feed line (50-1) and to the 1-2-1 feed line (50-2-1) come to have different power levels. Detailed explanations are omitted to prevent redundant description.

[0085] In this case, it becomes important how to determine the power levels of feed signals supplied to the 1-2 feed line (50-2) and the other K-1 (K: a positive integer) 1-2-2 feed lines (50-2-2) lying between the nearest first array antenna on the right of branch point(P) and the K first array antennas.

[0086] The power level of the feed signals supplied to each of the K-1 1-2-2 power supply lines (50-2-2) is determined using the thickness of the feed line (b) connected to the input end of first array antenna in the direction to the branch point(P) based on the relevant 1-2-2 feed line (50-2-2) and the thickness of the first length (a) placed on the right side of feed line connected to the input end of first array antenna on the relevant 1-2-2 feed line (50-2-2). Like the thickness of the first length (a) in the direction to the branch point(P) in the first feed unit (30), the thickness of the first length (a) on the left of the feed line connected to the input end of first array antenna on the relevant 1-2-2 feed line (50-2-2) is adjusted to achieve the impedance matching.

[0087] For ease of explanation, in the whole system, considering the antennas of #2 #K as one first antenna unit (10), the thickness of the first length (a) in the direction from #1 to the branch point(P) on the 1-1 feed line (50-1) and the thickness of the first length (a) in the direction to the branch point(P) on the 1-2-1 feed lines (50-2-1) are adjusted to control the power level of the feed signal; in the system comprising #2#K, considering the antennas of #3#K as one first antenna unit (10), the thickness of the feed line connected to the input end of #2 and the thickness of the first length lying on its right side are used to control the power level of the feed signal. By repeating this process, the power level of the feed signals supplied to the L first array antennas can be adjusted.

[0088] Meanwhile, the first length (a) in the above description may be /4, which is for impedance matching.

[0089] So far, the adjustment of the power level of the feed signal so that the first antenna unit (10) may have the characteristics of an asymmetric radiation pattern in the asymmetric wide-angle radar module (100) according to an embodiment of the present invention has been described. According to the present invention, the power level of the feed signal provided to the L first array antennas can be freely adjusted and thus the characteristics of the asymmetric radiation pattern can be effectively implemented as intended by the designer by adjusting the thickness of the first length (a) in the direction to the branch point(P) on the 1-1 feed line (50-1) providing the feed signal to the first array antenna placed on the left side of the branch point(P) and the thickness of the first length (a) in the direction to the branch point(P) on the 1-2 feed line (50-2) providing the feed signal to the first array antenna placed on the right and the right side, and furthermore, by adjusting the thickness of the 1-2-1 feed line (50-2-1) included in the 1-2 feed line (50-2) and of the feed line (b) connected to the input end of the first array antenna in the direction to the branch point(P) based on the 1-2-2 feed line (50-2-2) and the thickness of the first length (a) placed on the right side of the feed line connected to the input end of the first array antenna on the relevant 1-2-2 feed line (50-2-2).

[0090] FIG. 12 is a diagram showing the radiation pattern of the asymmetric wide-angle radar module (100) itself according to an embodiment of the present invention, where the radiation pattern of the first antenna unit (10) in FIG. 3 and the radiation pattern of the second antenna unit (20) in FIG. 5 are integrated and, more specifically, the wide-angle characteristic is 150 or more. In this, since the asymmetric wide-angle radar module (100) itself according to an embodiment of the present invention presents an asymmetric wide-angle radiation pattern, it can perform a plurality of functions through one radar module, minimizing the number of mounting radars and thus preventing the price increase of autonomous driving vehicle. In addition, with its asymmetric wide-angle radiation pattern, it can be widely used for BSD function, RCTA function, and LCA function that need to detect the farthest and widest area with one-time sensing.

[0091] On the other hand, In the case of a general radar module, two antenna units are included: a transmission channel antenna unit and a reception channel antenna unit. In the embodiment of the present invention for the asymmetric wide-angle radar module (100) described so far, the first antenna unit (10) is the transmission channel antenna unit and the second antenna unit (20) is the reception channel antenna unit. Of course, the first antenna unit (10) may be the reception channel antenna unit, and the second antenna unit (20) be the transmission channel antenna unit. In this case, all the above descriptions on the first antenna unit (10), for example, on the adjustments of phase difference and power level of the feed signal in order to implement an asymmetric wide-angle radiation pattern may be applied to the second antenna unit (20) as it is.

[0092] Finally, another embodiment of the present invention may be an autonomous driving vehicle module (not illustrated), an autonomous driving vehicle system (not illustrated), and an autonomous driving vehicle (not illustrated) including an asymmetric wide-angle radar module (100). Furthermore, the manufacturing method and control method of the asymmetric wide-angle radar module (100) may also correspond to one of various embodiments of the present invention.

[0093] Up to now, the embodiments of the present invention have been described with reference to the accompanying drawings. But those who are skilled in the field related to the present invention would well understand that this invention can be implemented in other specific forms without changing its technical spirit or essential features. Therefore, the embodiments described above shall be understood just as illustrative in all respects and not definitive.