Two-dimensional 180-degree coupler with filtering characteristic

Abstract

The invention discloses a two-dimensional 180-degree coupler with a filtering characteristic, and relates to the technical field of antennas. The invention discloses a two-dimensional 180-degree coupler with a filtering characteristic. The two-dimensional 180-degree coupler comprises a first 180-degree filtering coupler, a second 180-degree filtering coupler, a third 180-degree filtering coupler and a fourth 180-degree filtering coupler, the first 180-degree filtering coupler is respectively coupled with the third 180-degree filtering coupler and the fourth 180-degree filtering coupler; the second 180-degree filtering coupler is respectively coupled with a third 180-degree filtering coupler and a fourth 180-degree filtering coupler; the two-dimensional 180-degree coupler further comprises a first input port group, a second input port group, a first output port group and a second output port group, the first input port group is coupled with the first 180-degree filtering coupler, the second input port group is coupled with the second 180-degree filtering coupler, the first output port group is coupled with the third 180-degree filtering coupler, and the second output port group is coupled with the third 180-degree filtering coupler. And the second output port group is coupled with the fourth 180-degree filtering coupler. According to the invention, the system volume can be reduced and the performance can be improved.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a two-dimensional 180° coupler with filtering characteristics. Background Art

[0002] With the rapid development of wireless communication technology, people have higher and higher requirements for communication quality. Problems such as multipath fading and interference between channels are becoming more and more important. At present, the main technology to solve these problems is to use beam switching smart antennas. Multi-beam antenna systems with dynamically adjustable beam pointing have received high attention. The Butler matrix is ​​an important component of the beam switching smart antenna. The Butler matrix can provide phase difference for the multi-beam antenna, thereby expanding the communication capacity and improving the spectrum efficiency.

[0003] At the same time, with the rapid growth of wireless communication users, wireless communication systems have higher and higher performance requirements for system components, which also promotes the miniaturization, integration and multifunctionality of components. As one of the most commonly used methods to realize beamforming networks, the Butler matrix plays an important role in multi-beam antenna systems. How to realize a miniaturized and high-performance Butler matrix has attracted much attention. At present, the research on Butler matrix mainly focuses on the improvement of single performance, such as broadband and miniaturization. However, in practical applications, there are certain requirements for the volume and performance of Butler matrix.

[0004] Therefore, it is urgent to design a two-dimensional 180° coupler with filtering characteristics to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a two-dimensional 180° coupler with filtering characteristics, which can reduce the system volume and improve the performance.

[0006] In order to solve the above technical problems, the present invention provides a two-dimensional 180° coupler with filtering characteristics, including a first 180° filter coupler, a second 180° filter coupler, a third 180° filter coupler and a fourth 180° filter coupler; the first 180° filter coupler is coupled with the third 180° filter coupler and the fourth 180° filter coupler respectively; the second 180° filter coupler is coupled with the third 180° filter coupler and the fourth 180° filter coupler respectively; the two-dimensional 180° coupler also includes a first input port group, a second input port group, a first output port group and a second output port group, the first input port group is coupled with the first 180° filter coupler, the second input port group is coupled with the second 180° filter coupler, the first output port group is coupled with the third 180° filter coupler, and the second output port group is coupled with the fourth 180° filter coupler.

[0007] As an improvement of the above scheme, the first 180° filter coupler includes a first resonator, a fourth resonator, a second resonator and a third resonator coupled in sequence, and the first resonator is coupled to the third resonator; the second 180° filter coupler includes a sixth resonator, an eighth resonator, a fifth resonator and a seventh resonator coupled in sequence, and the sixth resonator is coupled to the seventh resonator; the third 180° filter coupler includes a ninth resonator, a twelfth resonator, a tenth resonator and an eleventh resonator coupled in sequence, and the ninth resonator is coupled to the eleventh resonator; the fourth 180° filter coupler includes a thirteenth resonator, a fifteenth resonator, a fourteenth resonator and a sixteenth resonator coupled in sequence, and the thirteenth resonator is coupled to the sixteenth resonator.

[0008] As an improvement of the above solution, the third resonator is coupled to the ninth resonator, the fourth resonator is coupled to the thirteenth resonator; the seventh resonator is coupled to the tenth resonator, and the eighth resonator is coupled to the fourteenth resonator.

[0009] As an improvement of the above scheme, the first input port group includes a first input port and a second input port, the first input port is coupled to the first resonator, and the second input port is coupled to the second resonator; the second input port group includes a third input port and a fourth input port, the third input port is coupled to the fifth resonator, and the fourth input port is coupled to the sixth resonator; the first output port group includes a fifth output port and a sixth output port, the fifth output port is coupled to the eleventh resonator, and the sixth output port is coupled to the twelfth resonator; the second output port group includes a seventh output port and an eighth output port, the seventh output port is coupled to the fifteenth resonator, and the eighth output port is coupled to the sixteenth resonator.

[0010] As an improvement of the above solution, the first input port is electrically coupled to the first resonator, the second input port is electrically coupled to the second resonator, the first resonator is electrically coupled to the third resonator and the fourth resonator respectively, the second resonator is electrically coupled to the third resonator, and the second resonator is magnetically coupled to the fourth resonator; the third input port is electrically coupled to the fifth resonator, the fourth input port is electrically coupled to the sixth resonator, the fifth resonator is electrically coupled to the seventh resonator and the eighth resonator respectively, the sixth resonator is electrically coupled to the seventh resonator, and the sixth resonator is magnetically coupled to the eighth resonator; The fifth output port is electrically coupled to the eleventh resonator, the sixth output port is electrically coupled to the twelfth resonator, the eleventh resonator is electrically coupled to the ninth resonator and the tenth resonator respectively, the twelfth resonator is electrically coupled to the ninth resonator, and the twelfth resonator is magnetically coupled to the tenth resonator; the seventh output port is electrically coupled to the fifteenth resonator, the eighth output port is electrically coupled to the sixteenth resonator, the thirteenth resonator is electrically coupled to the fifteenth resonator and the sixteenth resonator respectively, the fourteenth resonator is electrically coupled to the fifteenth resonator, and the fourteenth resonator is magnetically coupled to the sixteenth resonator.

[0011] As an improvement of the above-mentioned scheme, the two-dimensional 180° coupler adopts a stripline structure layout, and the stripline structure includes a top ground layer, a top dielectric layer, a middle dielectric layer, a bottom dielectric layer and a bottom ground layer arranged in sequence from top to bottom, and the thickness of the top dielectric layer and the bottom dielectric layer are both greater than the thickness of the middle dielectric layer.

[0012] As an improvement of the above scheme, the first input port, the first resonator, the fourth resonator, the third input port, the fifth resonator, the seventh resonator, the sixth output port, the twelfth resonator, the tenth resonator, the seventh output port, the fifteenth resonator and the thirteenth resonator are arranged on the bottom dielectric layer; the second input port, the second resonator, the third resonator, the fourth input port, the sixth resonator, the eighth resonator, the fifth output port, the eleventh resonator, the ninth resonator, the eighth output port, the sixteenth resonator and the fourteenth resonator are arranged on the top dielectric layer.

[0013] As an improvement of the above scheme, the first input port, the first resonator, the fourth resonator, the third input port, the fifth resonator, the seventh resonator, the sixth output port, the twelfth resonator, the tenth resonator, the seventh output port, the fifteenth resonator and the thirteenth resonator are arranged on the top of the bottom dielectric layer; the second input port, the second resonator, the third resonator, the fourth input port, the sixth resonator, the eighth resonator, the fifth output port, the eleventh resonator, the ninth resonator, the eighth output port, the sixteenth resonator and the fourteenth resonator are arranged at the bottom of the top dielectric layer.

[0014] As an improvement of the above solution, the dielectric constants of the top dielectric layer, the middle dielectric layer and the bottom dielectric layer are all 2.55, the heights of the top dielectric layer and the bottom dielectric layer are 1.5 mm, and the height of the middle dielectric layer is 0.25 mm.

[0015] The beneficial effects of implementing the present invention are:

[0016] The two-dimensional 180° coupler with filtering characteristics of the present invention adds filtering characteristics through the first 180° filtering coupler, the second 180° filtering coupler, the third 180° filtering coupler and the fourth 180° filtering coupler, thereby realizing a two-dimensional 180° coupler with filtering characteristics and reducing the overall volume of the two-dimensional 180° coupler system.

[0017] Furthermore, the two-dimensional 180° coupler with filtering characteristics of the present invention adopts a stripline structure layout, and the coupling between resonators is strengthened by setting the thickness of the top dielectric layer and the bottom dielectric layer to be greater than the thickness of the middle dielectric layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a principle diagram of a two-dimensional 180° coupler with filtering characteristics of the present invention;

[0019] Figure 2 A topological structure diagram of a two-dimensional 180° coupler with filtering characteristics according to the present invention;

[0020] Figure 3 It is a schematic diagram of the stripline structure of a two-dimensional 180° coupler with filtering characteristics of the present invention;

[0021] Figure 4 It is a schematic diagram of the stripline structure layout of the two-dimensional 180° coupler with filtering characteristics of the present invention;

[0022] Figure 5 It is a schematic diagram of S parameter simulation results when a signal is input to the third input port of the two-dimensional 180° coupler with filtering characteristics of the present invention;

[0023] Figure 6 It is a schematic diagram of phase test results when a signal is input to the third input port of the two-dimensional 180° coupler with filtering characteristics of the present invention;

[0024] Figure 7 It is a schematic diagram of the phase difference result when a signal is input from the third input port in the two-dimensional 180° coupler with filtering characteristics of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0026] like Figure 1 As shown, the two-dimensional 180° coupler with filtering characteristics of the present invention includes a first 180° filtering coupler 101, a second 180° filtering coupler 102, a third 180° filtering coupler 103 and a fourth 180° filtering coupler 104;

[0027] The first 180° filter coupler 101 is coupled to the third 180° filter coupler 103 and the fourth 180° filter coupler 104 respectively;

[0028] The second 180° filter coupler 102 is coupled to the third 180° filter coupler 103 and the fourth 180° filter coupler 104 respectively;

[0029] The two-dimensional 180° coupler also includes a first input port group 105, a second input port group 106, a first output port group 107 and a second output port group 108. The first input port group 105 is coupled to the first 180° filter coupler 101, the second input port group 106 is coupled to the second 180° filter coupler 102, the first output port group 107 is coupled to the third 180° filter coupler 103, and the second output port group 108 is coupled to the fourth 180° filter coupler 104.

[0030] The two-dimensional 180° coupler with filtering characteristics of the present invention adds filtering characteristics through the first 180° filtering coupler 101, the second 180° filtering coupler 102, the third 180° filtering coupler 103 and the fourth 180° filtering coupler 104, thereby realizing a two-dimensional 180° coupler with filtering characteristics and reducing the overall volume of the two-dimensional 180° coupler system.

[0031] like Figure 1 and Figure 2 As shown, the first 180° filter coupler 101 comprises a first resonator 1, a fourth resonator 4, a second resonator 2 and a third resonator 3 which are coupled in sequence, and the first resonator 1 is coupled to the third resonator 3;

[0032] The second 180° filter coupler 102 comprises a sixth resonator 6, an eighth resonator 8, a fifth resonator 5 and a seventh resonator 7 coupled in sequence, and the sixth resonator 6 is coupled to the seventh resonator 7;

[0033] The third 180° filter coupler 103 comprises a ninth resonator 9, a twelfth resonator 12, a tenth resonator 10 and an eleventh resonator 11 coupled in sequence, wherein the ninth resonator 9 is coupled to the eleventh resonator 11;

[0034] The fourth 180° filter coupler 104 includes a thirteenth resonator 13 , a fifteenth resonator 15 , a fourteenth resonator 14 and a sixteenth resonator 16 which are coupled in sequence, and the thirteenth resonator 13 is coupled to the sixteenth resonator 16 .

[0035] The third resonator 3 is coupled with the ninth resonator 9, and the fourth resonator 4 is coupled with the thirteenth resonator 13, so that the first 180° filter coupler 101 is coupled with the third 180° filter coupler 103 and the fourth 180° filter coupler 104 respectively;

[0036] The seventh resonator 7 is coupled with the tenth resonator 10, and the eighth resonator 8 is coupled with the fourteenth resonator 14, so that the second 180° filter coupler 102 is coupled with the third 180° filter coupler 103 and the fourth 180° filter coupler 104 respectively.

[0037] The first input port group 105 includes a first input port P1 and a second input port P2, the first input port P1 is coupled to the first resonator 1, and the second input port P2 is coupled to the second resonator 2;

[0038] The second input port group 106 includes a third input port P3 and a fourth input port P4, the third input port P3 is coupled to the fifth resonator 5, and the fourth input port P4 is coupled to the sixth resonator 6;

[0039] The first output port group 107 includes a fifth output port P5 and a sixth output port P6, the fifth output port P5 is coupled to the eleventh resonator 11, and the sixth output port P6 is coupled to the twelfth resonator 12;

[0040] The second output port group 108 includes a seventh output port P7 and an eighth output port P8 . The seventh output port P7 is coupled to the fifteenth resonator 15 , and the eighth output port P8 is coupled to the sixteenth resonator 16 .

[0041] The coupling mode of the two-dimensional 180° coupler with filtering characteristics of the present invention is electric coupling and magnetic coupling. Figure 2The solid line E represents electric coupling, the solid line M represents magnetic coupling, the first input port P1 is electrically coupled to the first resonator 1, the second input port P2 is electrically coupled to the second resonator 2, the first resonator 1 is electrically coupled to the third resonator 3 and the fourth resonator 4 respectively, the second resonator 2 is electrically coupled to the third resonator 3, and the second resonator 2 is magnetically coupled to the fourth resonator 4;

[0042] The third input port P3 is electrically coupled to the fifth resonator 5, the fourth input port P4 is electrically coupled to the sixth resonator 6, the fifth resonator 5 is electrically coupled to the seventh resonator 7 and the eighth resonator 8 respectively, the sixth resonator 6 is electrically coupled to the seventh resonator 7, and the sixth resonator 6 is magnetically coupled to the eighth resonator 8;

[0043] The fifth output port P5 is electrically coupled to the eleventh resonator 11, the sixth output port P6 is electrically coupled to the twelfth resonator 12, the eleventh resonator 11 is electrically coupled to the ninth resonator 9 and the tenth resonator 10 respectively, the twelfth resonator 12 is electrically coupled to the ninth resonator 9, and the twelfth resonator 12 is magnetically coupled to the tenth resonator 10;

[0044] The seventh output port P7 is electrically coupled to the fifteenth resonator 15, the eighth output port P8 is electrically coupled to the sixteenth resonator 16, the thirteenth resonator 13 is electrically coupled to the fifteenth resonator 15 and the sixteenth resonator 16 respectively, the fourteenth resonator 14 is electrically coupled to the fifteenth resonator 15, and the fourteenth resonator 14 is magnetically coupled to the sixteenth resonator 16.

[0045] like Figure 3 As shown, the two-dimensional 180° coupler adopts a stripline structure layout, and the stripline structure includes a top ground layer 109, a top dielectric layer 110, a middle dielectric layer 111, a bottom dielectric layer 112 and a bottom ground layer 113 arranged from top to bottom, and the thickness of the top dielectric layer 110 and the bottom dielectric layer 112 are both greater than the thickness of the middle dielectric layer 111.

[0046] Preferably, the dielectric constants of the top dielectric layer 110, the middle dielectric layer 111, and the bottom dielectric layer 112 are all 2.55, the heights of the top dielectric layer 110 and the bottom dielectric layer 112 are 1.5 mm, and the height of the middle dielectric layer 111 is 0.25 mm. This design makes the middle dielectric layer 111 thinner than the top dielectric layer 110 and the bottom dielectric layer 112, and can achieve strong coupling between the components located in the top dielectric layer 110 and the bottom dielectric layer 112.

[0047] Combination Figure 2 to Figure 4, describing the specific structure of the two-dimensional 180° coupler with filtering characteristics of the present invention: the first input port P1, the first resonator 1, the fourth resonator 4, the third input port P3, the fifth resonator 5, the seventh resonator 7, the sixth output port P6, the twelfth resonator 12, the tenth resonator 10, the seventh output port P7, the fifteenth resonator 15 and the thirteenth resonator 13 are arranged on the bottom dielectric layer 112;

[0048] The second input port P2, the second resonator 2, the third resonator 3, the fourth input port P4, the sixth resonator 6, the eighth resonator 8, the fifth output port P5, the eleventh resonator 11, the ninth resonator 9, the eighth output port P8, the sixteenth resonator 16 and the fourteenth resonator 14 are disposed on the top dielectric layer 110.

[0049] Further, in order to strengthen the coupling, the first input port P1, the first resonator 1, the fourth resonator 4, the third input port P3, the fifth resonator 5, the seventh resonator 7, the sixth output port P6, the twelfth resonator 12, the tenth resonator 10, the seventh output port P7, the fifteenth resonator 15 and the thirteenth resonator 13 are arranged on the top of the bottom dielectric layer 112;

[0050] The second input port P2, the second resonator 2, the third resonator 3, the fourth input port P4, the sixth resonator 6, the eighth resonator 8, the fifth output port P5, the eleventh resonator 11, the ninth resonator 9, the eighth output port P8, the sixteenth resonator 16 and the fourteenth resonator 14 are disposed at the bottom of the top dielectric layer 110.

[0051] The two-dimensional 180° coupler with filtering characteristics of the present invention is designed and manufactured;

[0052] like Figure 5 to Figure 7 As shown, it should be noted that Figure 5 to Figure 7 S AB In the figure, A and B both represent ports, and the ports include the first input port P1, the second input port P2, the third input port P3, the fourth input port P4, the fifth output port P5, the sixth output port P6, the seventh output port P7 and the eighth output port P8;

[0053] For example Figure 5 S83 in the figure represents: the transmission coefficient between the third input port P3 and the eighth output port P8;

[0054] For example Figure 6 ∠S83 in the equation represents the phase between the third input port P3 and the eighth output port P8;

[0055] For example Figure 7∠S83-∠S63 in ∠S83 represents the difference between the phase between the third input port P3 and the eighth output port P8 and the phase between the third input port P3 and the sixth output port P6.

[0056] It can be seen from the figure that the two-dimensional 180° coupler with filtering characteristics of the present invention has good filtering characteristics. And because the coupler is the main component of the Butler matrix, the two-dimensional 180° coupler with filtering characteristics of the present invention is applied to the Butler matrix, which can effectively reduce the volume of the system; at the same time, the Butler matrix using the two-dimensional 180° coupler with filtering characteristics of the present invention can effectively suppress the side lobe level of the antenna, thereby reducing mutual interference and making the performance of the system more excellent.

[0057] In summary, the two-dimensional 180° coupler with filtering characteristics of the present invention realizes a two-dimensional 180° coupler with filtering characteristics, and reduces the overall volume of the two-dimensional 180° coupler system; by adopting a stripline structure layout, and by setting the thickness of the top dielectric layer and the bottom dielectric layer to be greater than the thickness of the middle dielectric layer, the coupling between the resonators is strengthened. Applying the two-dimensional 180° coupler with filtering characteristics of the present invention to a Butler matrix can effectively reduce the volume of the system and make the performance of the system more excellent.

[0058] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A two-dimensional 180° coupler with filtering characteristics, characterized in that: comprising a first 180° filter coupler, a second 180° filter coupler, a third 180° filter coupler and a fourth 180° filter coupler; The first 180° filter coupler is coupled to the third 180° filter coupler and the fourth 180° filter coupler respectively; The second 180° filter coupler is coupled to the third 180° filter coupler and the fourth 180° filter coupler respectively; The two-dimensional 180° coupler also includes a first input port group, a second input port group, a first output port group and a second output port group. The first input port group is coupled to a first 180° filter coupler, the second input port group is coupled to a second 180° filter coupler, the first output port group is coupled to a third 180° filter coupler, and the second output port group is coupled to a fourth 180° filter coupler.

2. The two-dimensional 180° coupler with filtering characteristics according to claim 1, characterized in that: The first 180° filter coupler comprises a first resonator, a fourth resonator, a second resonator and a third resonator coupled in sequence, wherein the first resonator is coupled to the third resonator; The second 180° filter coupler comprises a sixth resonator, an eighth resonator, a fifth resonator and a seventh resonator coupled in sequence, and the sixth resonator is coupled to the seventh resonator; The third 180° filter coupler comprises a ninth resonator, a twelfth resonator, a tenth resonator and an eleventh resonator coupled in sequence, and the ninth resonator is coupled to the eleventh resonator; The fourth 180° filter coupler includes a thirteenth resonator, a fifteenth resonator, a fourteenth resonator and a sixteenth resonator coupled in sequence, and the thirteenth resonator is coupled to the sixteenth resonator.

3. The two-dimensional 180° coupler with filtering characteristics according to claim 2, characterized in that: The third resonator is coupled to the ninth resonator, and the fourth resonator is coupled to the thirteenth resonator; The seventh resonator is coupled to the tenth resonator, and the eighth resonator is coupled to the fourteenth resonator.

4. The two-dimensional 180° coupler with filtering characteristics according to claim 3, characterized in that: The first input port group includes a first input port and a second input port, the first input port is coupled to the first resonator, and the second input port is coupled to the second resonator; The second input port group includes a third input port and a fourth input port, the third input port is coupled to the fifth resonator, and the fourth input port is coupled to the sixth resonator; The first output port group includes a fifth output port and a sixth output port, the fifth output port is coupled to the eleventh resonator, and the sixth output port is coupled to the twelfth resonator; The second output port group includes a seventh output port and an eighth output port, the seventh output port is coupled to the fifteenth resonator, and the eighth output port is coupled to the sixteenth resonator.

5. The two-dimensional 180° coupler with filtering characteristics according to claim 4, characterized in that: The first input port is electrically coupled to the first resonator, the second input port is electrically coupled to the second resonator, the first resonator is electrically coupled to the third resonator and the fourth resonator respectively, the second resonator is electrically coupled to the third resonator, and the second resonator is magnetically coupled to the fourth resonator; The third input port is electrically coupled to the fifth resonator, the fourth input port is electrically coupled to the sixth resonator, the fifth resonator is electrically coupled to the seventh resonator and the eighth resonator respectively, the sixth resonator is electrically coupled to the seventh resonator, and the sixth resonator is magnetically coupled to the eighth resonator; The fifth output port is electrically coupled to the eleventh resonator, the sixth output port is electrically coupled to the twelfth resonator, the eleventh resonator is electrically coupled to the ninth resonator and the tenth resonator respectively, the twelfth resonator is electrically coupled to the ninth resonator, and the twelfth resonator is magnetically coupled to the tenth resonator; The seventh output port is electrically coupled to the fifteenth resonator, the eighth output port is electrically coupled to the sixteenth resonator, the thirteenth resonator is electrically coupled to the fifteenth resonator and the sixteenth resonator respectively, the fourteenth resonator is electrically coupled to the fifteenth resonator, and the fourteenth resonator is magnetically coupled to the sixteenth resonator.

6. The two-dimensional 180° coupler with filtering characteristics according to claim 4, characterized in that: The two-dimensional 180° coupler adopts a stripline structure layout, and the stripline structure includes a top ground layer, a top dielectric layer, a middle dielectric layer, a bottom dielectric layer and a bottom ground layer arranged in sequence from top to bottom, and the thickness of the top dielectric layer and the bottom dielectric layer are both greater than the thickness of the middle dielectric layer.

7. The two-dimensional 180° coupler with filtering characteristics according to claim 6, characterized in that: The first input port, the first resonator, the fourth resonator, the third input port, the fifth resonator, the seventh resonator, the sixth output port, the twelfth resonator, the tenth resonator, the seventh output port, the fifteenth resonator and the thirteenth resonator are disposed on the bottom dielectric layer; The second input port, the second resonator, the third resonator, the fourth input port, the sixth resonator, the eighth resonator, the fifth output port, the eleventh resonator, the ninth resonator, the eighth output port, the sixteenth resonator and the fourteenth resonator are disposed on the top dielectric layer.

8. The two-dimensional 180° coupler with filtering characteristics according to claim 7, characterized in that: The first input port, the first resonator, the fourth resonator, the third input port, the fifth resonator, the seventh resonator, the sixth output port, the twelfth resonator, the tenth resonator, the seventh output port, the fifteenth resonator and the thirteenth resonator are disposed on top of the bottom dielectric layer; The second input port, the second resonator, the third resonator, the fourth input port, the sixth resonator, the eighth resonator, the fifth output port, the eleventh resonator, the ninth resonator, the eighth output port, the sixteenth resonator and the fourteenth resonator are disposed at the bottom of the top dielectric layer.

9. The two-dimensional 180° coupler with filtering characteristics according to claim 6, characterized in that: The dielectric constants of the top dielectric layer, the middle dielectric layer, and the bottom dielectric layer are all 2.

55. The heights of the top dielectric layer and the bottom dielectric layer are 1.5 mm, and the height of the middle dielectric layer is 0.25 mm.

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