Integrated Butler power divider

Abstract

The invention provides an integrated Butler power divider, which comprises a first Butler power divider and a second Butler power divider, the first Butler power divider comprises a first three-branch directional coupler, a first unequal power divider and a second unequal power divider which are connected with the first three-branch directional coupler, and a plurality of equal power dividers which are connected with the unequal power dividers; the second Butler power divider comprises a second three-branch directional coupler, a third unequal power divider, a fourth unequal power divider and a plurality of equal power dividers, wherein the third unequal power divider and the fourth unequal power divider are connected with the second three-branch directional coupler, and the equal power dividers are connected with the unequal power dividers. Therefore, the antenna is not only simple to assemble, but also can meet the broadband communication requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile communications, and in particular to an integrated Butler power divider. Background Art

[0002] With the development of mobile communication technology, mobile traffic has exploded, and the number of base station antennas has also increased rapidly. In densely populated areas, traditional base station antennas have a wide beam and single beam characteristics, and the communication capacity is difficult to meet actual needs. Therefore, base station antennas are gradually evolving from traditional wide beam and single beam antennas to narrow beam, multi-beam antennas, and smart antennas.

[0003] The Butler power divider is the core module of the multi-beam antenna and is currently facing many challenges. For example, in a multi-frequency antenna array, the existing Butler matrix is ​​too large, and interference may occur in the antenna array layout; the Butler matrix has a narrow operating frequency band and low beam isolation, which cannot meet the communication needs of broadband; when mass-producing multi-beam antennas, the number of cables and solder joints connecting the Butler matrix is ​​large, which makes antenna assembly difficult, and the electrical performance and third-order passive intermodulation pass rate are low. Summary of the invention

[0004] In view of the above-mentioned defects, the object of the present invention is to provide an integrated Butler power divider to solve the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention provides an integrated Butler power divider, comprising a first Butler power divider and a second Butler power divider, wherein:

[0006] The first Butler power divider includes a first three-branch directional coupler, a first unequal power divider, a second unequal power divider, a second equal power divider, a fourth equal power divider, a fifth equal power divider and a seventh equal power divider; the first output port and the second output port of the first three-branch directional coupler are respectively connected to the first unequal power divider and the second unequal power divider, the output end of the first unequal power divider is respectively connected to the second equal power divider and the fifth equal power divider, and the output end of the second unequal power divider is respectively connected to the fourth equal power divider and the seventh equal power divider;

[0007] The second Butler power divider includes a second three-branch directional coupler, a third unequal power divider, a fourth unequal power divider, a first equal power divider, a third equal power divider, a sixth equal power divider and an eighth equal power divider; the third output port and the fourth output port of the second three-branch directional coupler are respectively connected to the third unequal power divider and the fourth unequal power divider, the output end of the third unequal power divider is respectively connected to the first equal power divider and the sixth equal power divider, and the output end of the fourth unequal power divider is respectively connected to the third equal power divider and the eighth equal power divider.

[0008] Optionally, the first three-branch directional coupler also includes a first input port and a second input port, the first input port and the first output port are arranged on a first branch line, the second input port and the second output port are arranged on a third branch line, the first branch line and the third branch line are both composed of four grounded short-circuit lines with a length of one quarter wavelength, the four short-circuit lines are parallel and have the same spacing, and the four short-circuit lines are cross-coupled in pairs; the first branch line and the third branch line are connected through a second branch line, the second branch line includes four U-shaped lines and a narrow line connected in the middle of the four U-shaped lines, wherein the four U-shaped lines are distributed in pairs up and down, and the two U-shaped lines at the upper end are connected through a wide line and are respectively connected to the first branch line and the third branch line, the two U-shaped lines at the lower end are connected through a wide line and are respectively connected to the first branch line and the third branch line, and the two ends of the narrow line are connected to the U-shaped lines up and down;

[0009] The second three-branch directional coupler further includes a third input port and a fourth input port, and the second three-branch directional coupler has the same circuit structure as the first three-branch directional coupler.

[0010] Optionally, both the first input port and the second input port are L-shaped structures and the ends are set as round pads, and the middle of the round pad is used to connect to the coaxial cable core wire of the ground layer;

[0011] The third input port and the fourth input port have the same structural design as the first input port and the second input port.

[0012] Optionally, the first unequal power divider includes a fifth input port, a fifth output port and a sixth output port, and the power ratio between the fifth output port and the sixth output port is 1:4.4; the fifth input port is connected to the first output port, and the fifth output port and the sixth output port are connected to the second equal power divider and the fifth equal power divider respectively;

[0013] The second unequal power divider includes a sixth input port, a seventh output port and an eighth output port, and the power ratio between the seventh output port and the eighth output port is 1:4.4; the sixth input port is connected to the second output port, and the seventh output port and the eighth output port are connected to the seventh equal power divider and the fourth equal power divider respectively;

[0014] The third unequal power divider includes a seventh input port, a ninth output port and a tenth output port, and the power ratio between the ninth output port and the tenth output port is 1:4.4; the seventh input port is connected to the third output port, and the ninth output port and the tenth output port are connected to the first equal power divider and the sixth equal power divider respectively;

[0015] The fourth unequal power divider includes an eighth input port, an eleventh output port and a twelfth output port, and the power ratio between the eleventh output port and the twelfth output port is 1:4.4; the eighth input port is connected to the fourth output port, and the eleventh output port and the twelfth output port are respectively connected to the eighth equal power divider and the third equal power divider.

[0016] Optionally, the first equally divided power divider includes a ninth input port, a thirteenth output port and a fourteenth output port, and the power ratio of the thirteenth output port to the fourteenth output port is 1:1; the line of the ninth input port and a ground short-circuit line are on the same vertical line, the line of the thirteenth output port and the line of the fourteenth output port are on the same vertical line, and the lines where the ninth input port, the thirteenth output port and the fourteenth output port are located are connected through a horizontal line;

[0017] The second equal power divider, the third equal power divider, the fourth equal power divider, the fifth equal power divider, the sixth equal power divider, the seventh equal power divider and the eighth equal power divider all have the same circuit structure design as the first equal power divider.

[0018] Optionally, the input ports corresponding to the first equal power divider, the third equal power divider, the sixth equal power divider and the eighth equal power divider have the same orientation, all facing the second three-branch directional coupler;

[0019] The input ports corresponding to the second equal power divider, the fourth equal power divider, the fifth equal power divider and the seventh equal power divider have the same orientation, which is facing the first three-branch directional coupler;

[0020] The first equal power divider, the third equal power divider, the fifth equal power divider and the seventh equal power divider are respectively distributed on the left sides of the second equal power divider, the fourth equal power divider, the sixth equal power divider and the eighth equal power divider.

[0021] Optionally, the first, third, fifth and seventh power dividers are spaced the same from each other; the second, fourth, sixth and eighth power dividers are spaced the same from each other.

[0022] Optionally, the integrated Butler power divider is a PCB microstrip line structure, which is composed of a circuit layer, a dielectric layer, a ground layer, a coaxial cable and an oscillator, and the first Butler power divider and the second Butler power divider are arranged on the circuit layer.

[0023] Optionally, the output port of each equal power divider is connected to the corresponding oscillator through a line, and the phase of the four oscillators respectively connected to the first equal power divider, the second equal power divider, the third equal power divider and the fourth equal power divider is 0 degrees, and the phase of the four oscillators respectively connected to the fifth equal power divider, the sixth equal power divider, the seventh equal power divider and the eighth equal power divider is 180 degrees.

[0024] Optionally, the corresponding ports of the first unequal power divider, the second unequal power divider, the third unequal power divider and the fourth unequal power divider are connected to the corresponding equal power dividers through lines, and the vertically crossed connection lines are avoided by bypassing the back of the ground plate through metal via jumpers.

[0025] The integrated Butler power divider described in the present invention includes a first Butler power divider and a second Butler power divider, wherein the first Butler power divider includes a first three-branch directional coupler, a first unequal power divider and a second unequal power divider connected to the first three-branch directional coupler, and a plurality of equal power dividers connected to the unequal power divider; the second Butler power divider includes a second three-branch directional coupler, a third unequal power divider and a fourth unequal power divider connected to the second three-branch directional coupler, and a plurality of equal power dividers connected to the unequal power divider. Through the structure and circuit construction of each module, the present invention can not only widen the working frequency band and improve the isolation to meet the communication requirements of broadband; it is simple to assemble and can greatly improve the qualified rate of the third-order passive intermodulation of the antenna; it is low in cost; it can be applied to multi-band multi-beam antennas to realize platform modularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A schematic diagram of the architecture of the integrated Butler power divider provided in one embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of the integrated Butler power divider provided in one embodiment of the present invention;

[0028] Figure 3 A schematic structural diagram of the three-branch directional coupler with integrated Butler power divider provided in one embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of each equally divided power divider of the integrated Butler power divider provided in one embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the assembly structure of the integrated Butler power divider provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that references to "one embodiment", "embodiment", "example embodiment", etc. in this specification refer to the embodiment described, which may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Furthermore, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it has been shown that it is within the knowledge of those skilled in the art to combine such features, structures or characteristics into other embodiments.

[0033] In addition, certain words are used in the specification and subsequent claims to refer to specific components or parts. Those with ordinary knowledge in the relevant field should understand that manufacturers can use different nouns or terms to refer to the same component or part. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0034] Figure 1An integrated Butler power divider provided by an embodiment of the present invention is shown, comprising a first Butler power divider and a second Butler power divider, wherein:

[0035] The first Butler power divider includes a first three-branch directional coupler 11, a first unequal power divider 21, a second unequal power divider 22, a second equal power divider 42, a fourth equal power divider 44, a fifth equal power divider 45 and a seventh equal power divider 47; see Figure 2 , the first output port 113 and the second output port 114 of the first three-branch directional coupler 11 are respectively connected to the first unequal power divider 21 and the second unequal power divider 22, the output end of the first unequal power divider 21 is respectively connected to the second equal power divider 42 and the fifth equal power divider 45, and the output end of the second unequal power divider 22 is respectively connected to the fourth equal power divider 44 and the seventh equal power divider 47;

[0036] The second Butler power divider includes a second three-branch directional coupler 12, a third unequal power divider 23, a fourth unequal power divider 24, a first equal power divider 41, a third equal power divider 43, a sixth equal power divider 46 and an eighth equal power divider 48; the third output port 123 and the fourth output port 124 of the second three-branch directional coupler 12 are respectively connected to the third unequal power divider 23 and the fourth unequal power divider 24, the output end of the third unequal power divider 23 is respectively connected to the first equal power divider 41 and the sixth equal power divider 46, and the output end of the fourth unequal power divider 24 is respectively connected to the third equal power divider 43 and the eighth equal power divider 48.

[0037] See also Figure 5 Preferably, the integrated Butler power divider is a PCB microstrip line structure, and the operating frequency band is 1695Mhz-2690Mhz; it is composed of a circuit layer 10, a dielectric layer 20, a ground layer 30, a coaxial cable 40 and an oscillator 50, and the first Butler power divider and the second Butler power divider are arranged on the circuit layer. Among them, the oscillator 50, the circuit layer 10, the dielectric layer 20, the ground layer 30 and the coaxial cable 40 are assembled from top to bottom in this way; specifically, the Butler matrix, the equal power divider, and the oscillator are integrated on the same PCB board, and the circuit connecting the Butler matrix and the equal power divider and the cable connecting the equal power divider and the oscillator are removed, so that assembly and winding are easier and the material cost is low; the number of solder joints is reduced, which can greatly improve the qualified rate of the third-order passive intermodulation of the antenna. The connection point between the integrated Butler power divider and the oscillator 50 adopts the wave soldering method, which can save manual soldering time and cost, and improve the product standing wave ratio, isolation, and stability of the third-order passive intermodulation.

[0038] The first three-branch directional coupler 11 includes a first input port 111, a second input port 112, a first output port 113 and a second output port 114; the second three-branch directional coupler 12 includes a third input port 121, a fourth input port 122, a third output port 123 and a fourth output port 124, that is, the second three-branch directional coupler 12 has the same circuit as the first three-branch directional coupler 11.

[0039] The first three-branch directional coupler 11 of this embodiment has three branch lines, and the length of the branch lines is about a quarter wavelength; see Figure 3 , the first input port 111 and the first output port 113 are arranged on the first branch line, the second input port 112 and the second output port 114 are arranged on the third branch line, the first branch line and the third branch line are both composed of four ground short-circuit lines 1152 with a length of one quarter wavelength, the four short-circuit lines 1152 are parallel and have the same spacing, the spacing between the short-circuit lines 1152 is between 0.2 and 1.2 mm, and the four short-circuit lines 1152 are cross-coupled in pairs, that is, two of the ground short-circuit lines 1152 are cross-coupled with the other two ground short-circuit lines 1152, specifically, the ports of the connected ground short-circuit lines 1152 are staggered; and the first branch line and the third branch line are connected through the second branch line, the second branch line includes four U-shaped lines 1153 and connected to the four The narrow line 1154 in the middle of the U-shaped line, wherein the four U-shaped lines 1153 are distributed in pairs up and down, and the two U-shaped lines 1153 at the upper end are connected through the wide line 1155 and are respectively connected to the first branch line and the third branch line, and the two U-shaped lines 1153 at the lower end are connected through the wide line 1155 and are respectively connected to the first branch line and the third branch line, and the two ends of the narrow line 1154 are connected to the U-shaped line 1153 up and down; specifically, the upper and lower ends of the narrow line 1154 are respectively connected to the wide line 1155, that is, a structure in which the middle line 1154 has a narrow line width and the wide lines 1155 on both sides have a wide line width, such a structure can widen the working bandwidth and improve the isolation; the second three-branch directional coupler 12 has the same line structure as the first three-branch directional coupler 11, which will not be repeated here.

[0040] As shown in the figure, the first input port 111 and the second input port 112 of this embodiment are both L-shaped structures and the ends are set as circular pads, and the middle of the circular pad is used to connect to the coaxial cable core wire of the ground layer; the third input port 121 and the fourth input port 122 have the same structural design as the first input port 111 and the second input port 112; in this way, the size of the integrated Butler power divider can be reduced.

[0041] The first unequal power divider 21 of the present embodiment includes a fifth input port 211, a fifth output port 212 and a sixth output port 213, and the power ratio between the fifth output port 212 and the sixth output port 213 is 1:4.4; the fifth input port 211 is connected to the first output port 113, and the fifth output port 212 and the sixth output port 213 are connected to the second equal power divider 42 and the fifth equal power divider 45 respectively; specifically, the fifth input port 211 is connected to the first output port 113 through a straight line 309 .... The lines of the fifth output port 212 and the sixth output port 213 are on the same straight line, and the line of the fifth input port 211 is perpendicular to the lines of the fifth output port 212 and the sixth output port 213. The end of the fifth input port 211 is bent ninety degrees and connected to the straight line 309. The straight line 309 is parallel to the straight line where the fifth output port 212 and the sixth output port 213 are located. The power ratio of the sixth output port 213 to the fifth output port 212 is 4.4:1, the power is relatively large, and the horizontal sidelobe suppression of the multi-beam antenna is good.

[0042] The second unequal power divider 22 includes a sixth input port 221, a seventh output port 222 and an eighth output port 223, and the power ratio between the seventh output port 222 and the eighth output port 223 is 1:4.4; the sixth input port 221 is connected to the second output port 114, and the seventh output port 222 and the eighth output port 223 are respectively connected to the seventh equal power divider 47 and the fourth equal power divider 44; the sixth input port 221 and the second output port 114 are connected via a line 310; the specific structural line design of the second unequal power divider 22 of this embodiment is the same as that of the first unequal power divider 21.

[0043] The third unequal power divider 23 includes a seventh input port 231, a ninth output port 232 and a tenth output port 233, and the power ratio between the ninth output port 232 and the tenth output port 233 is 1:4.4; the seventh input port 231 is connected to the third output port 123, and the ninth output port 232 and the tenth output port 233 are respectively connected to the first equal power divider 41 and the sixth equal power divider 46; the seventh input port 231 is connected to the third output port 123 through a line 311; the specific structural line design of the third unequal power divider 23 of this embodiment is the same as that of the first unequal power divider 21.

[0044] The fourth unequal power divider 24 includes an eighth input port 241, an eleventh output port 242 and a twelfth output port 243, and the power ratio between the eleventh output port 242 and the twelfth output port 243 is 1:4.4; the eighth input port 241 is connected to the fourth output port 124, and the eleventh output port 242 and the twelfth output port 243 are respectively connected to the eighth equal power divider 48 and the third equal power divider 43; the eighth input port 241 and the fourth output port 124 are connected via a line 312; the specific structural line design of the fourth unequal power divider 24 of this embodiment is the same as that of the first unequal power divider 21.

[0045] Further, the first equally divided power divider 41 of the present embodiment includes a ninth input port 4101, a thirteenth output port 4102 and a fourteenth output port 4103, and the power ratio of the thirteenth output port 4102 to the fourteenth output port 4103 is 1:1; preferably, the output port is preset with a phase difference that meets the requirements; the line of the ninth input port 4101 and a ground short-circuit line are on the same vertical line, the lines of the thirteenth output port 4102 and the fourteenth output port 4103 are on the same vertical line, and the lines where the ninth input port 4101, the thirteenth output port 4102 and the fourteenth output port 4103 are located are connected by a horizontal line; Figure 4 , the line 411 of the ninth input port 4101 is on the same straight line as a ground short-circuit line 413, and the end of the ground short-circuit line 413 is a ground port 414; the line 415 where the thirteenth output port 4102 is located and the line 416 where the fourteenth output port 4103 is located are on the same straight line, and then these two straight lines are connected through a horizontal line 412, that is, the ninth input port 4101, the thirteenth output port 4102 and the fourteenth output port 4103 are connected through the line 412; wherein, the two output ports are used to connect to the vibrator through the line 511 or the line 611.

[0046] As shown, the second equally divided power divider 42 includes a tenth input port 4201 , a fifteenth output port 4202 , and a sixteenth output port 4203 ;

[0047] The third equally dividing power divider 43 comprises an eleventh input port 4301 , a seventeenth output port 4302 and an eighteenth output port 4303 ;

[0048] The fourth equal power divider 44 includes a twelfth input port 4401 , a nineteenth output port 4402 , and a twentieth output port 4403 ;

[0049] The fifth equally dividing power divider 45 comprises a thirteenth input port 4501 , a twenty-first output port 4502 , and a twenty-second output port 4503 ;

[0050] The sixth equally dividing power divider 46 comprises a fourteenth input port 4601 , a twenty-third output port 4602 and a twenty-fourth output port 4603 ;

[0051] The seventh equal power divider includes a fifteenth input port 4701, a twenty-fifth output port 4702, and a twenty-sixth output port 4701;

[0052] The eighth equal power divider 48 includes a sixteenth input port 4801 , a twenty-seventh output port 4802 and a twenty-eighth output port 4803 .

[0053] The second equal power divider 42 , the third equal power divider 43 , the fourth equal power divider 44 , the fifth equal power divider 45 , the sixth equal power divider 46 , the seventh equal power divider 47 and the eighth equal power divider 48 all have the same circuit structure design as the first equal power divider 41 .

[0054] Furthermore, the input ports corresponding to the first equal power divider 41, the third equal power divider 43, the sixth equal power divider 46 and the eighth equal power divider 48 have the same orientation, all facing the second three-branch directional coupler 12; the input ports corresponding to the second equal power divider 42, the fourth equal power divider 44, the fifth equal power divider 45 and the seventh equal power divider 47 have the same orientation, all facing the first three-branch directional coupler 11; that is, the input ports of the first equal power divider 41, the third equal power divider 43, the sixth equal power divider 46 and the eighth equal power divider 48 have the same orientation, all facing downward; the input ports of the second equal power divider 42, the fourth equal power divider 44, the fifth equal power divider 45 and the seventh equal power divider 47 have the same orientation, all facing downward. The input ports of the fifth equal power divider 45 and the seventh equal power divider 47 have the same orientation, both facing upward; the adjacent spacings between the first equal power divider 41, the third equal power divider 43, the fifth equal power divider 45 and the seventh equal power divider 47 are the same; the adjacent spacings between the second equal power divider 42, the fourth equal power divider 44, the sixth equal power divider and the eighth equal power divider 48 are the same; the first equal power divider 41, the third equal power divider 43, the fifth equal power divider 45 and the seventh equal power divider 47 are respectively distributed on the left sides of the second equal power divider 42, the fourth equal power divider 44, the sixth equal power divider 46 and the eighth equal power divider 48.

[0055] Furthermore, the output ports of each equal power divider are connected to the corresponding oscillator 50 through a line, and the phases of the four oscillators 50 respectively connected to the first equal power divider 41, the second equal power divider 42, the third equal power divider 43 and the fourth equal power divider 44 are 0 degrees, and the phases of the four oscillators 50 respectively connected to the fifth equal power divider 45, the sixth equal power divider 46, the seventh equal power divider 47 and the eighth equal power divider 48 are 180 degrees.

[0056] The corresponding ports of the first unequal power divider 21, the second unequal power divider 22, the third unequal power divider 23 and the fourth unequal power divider 24 are connected to the corresponding equal power dividers through lines, and the vertically crossed connection lines are avoided by bypassing the back of the ground plate through metal via jumpers.

[0057] As shown in the figure, the fifth output port 212 of the first unequal power divider 21 is connected to the tenth input port 4201 of the second equal power divider 42 through the line 302; the sixth output port 213 of the first unequal power divider 21 is connected to the thirteenth input port 4501 of the fifth equal power divider 45 through the line 305. The eighth output port 223 of the second unequal power divider 22 is connected to the twelfth input port 4401 of the fourth equal power divider 44 through the line 304; the seventh output port 222 of the second unequal power divider 22 is connected to the fifteenth input port 4701 of the seventh equal power divider 47 through the line 307. Among them, the line 304 and the line 305 are vertically crossed, and the line 304 bypasses the line 305 from the back of the ground plate through the metal via jumper. Among them, the parallel part of line 304 and line 305, line 304 is wired between the first three-branch directional coupler 11 and line 305, and the line winding distance is short, which can reduce network loss, reduce the size of the integrated Butler power divider, and reduce material costs.

[0058] The ninth output port 232 of the third unequal power divider 23 is connected to the ninth input port 4101 of the first equal power divider 41 through line 301; the tenth output port 233 of the third unequal power divider 23 is connected to the fourteenth input port 4601 of the sixth equal power divider 46 through line 306. The eleventh output port 242 of the fourth unequal power divider 24 is connected to the sixteenth input port 4801 of the eighth equal power divider 48 through line 308; the twelfth output port 243 of the fourth unequal power divider 24 is connected to the eleventh input port 4301 of the third equal power divider 43 through line 303. Among them, line 303 and line 306 are vertically crossed, and line 306 bypasses line 303 from the back of the ground plate through a metal via jumper. Among them, the parallel part of line 303 and line 306, line 306 is wired between the second three-branch directional coupler 11 and line 303.

[0059] The integrated Butler power divider provided in this embodiment can be used as a vibrator feed plate due to the empty PCB circuit in the middle, which makes rational use of materials and saves product costs. In addition, the empty space in the middle of the integrated Butler power divider can also be embedded with a low-frequency vibrator, which is suitable for multi-band multi-beam antennas to achieve platform modularization.

[0060] The specific working principle of the integrated Butler power divider provided in this embodiment is as follows:

[0061] 1. When the electromagnetic wave signal is input from the first input port 111 of the first three-branch directional coupler 11, the second input port 112 of the first three-branch directional coupler 11 is an isolated port, and basically no signal is output. At this time, the power ratios output from the second, fourth, fifth, and seventh power dividers are 1:4.4:4.4:1, respectively, and the output phase differences are 0°, 90°, 0°, and 90°, respectively. Adding the phase of the corresponding vibrator 50, the phases of the corresponding radiation surface are 0°, 90°, 180°, and 270°, respectively, meeting the requirements of the phase difference of 90° for multi-beam antenna shaping, and forming a beam with a horizontal beam offset of about 30°.

[0062] 2. When the electromagnetic wave signal is input from the second input port 112 of the first three-branch directional coupler 11, the first input port 111 of the first three-branch directional coupler 11 is an isolated port, and basically no signal is output. At this time, the power ratios output from the second, fourth, fifth, and seventh power dividers are 1:4.4:4.4:1, respectively, and the output phase differences are 90°, 0°, 90°, and 0°, respectively. Adding the phase of the corresponding vibrator 50, the phases of the corresponding radiation surface are 90°, 0°, -90°, and -180°, respectively, meeting the requirements of the phase difference of 90° for multi-beam antenna shaping, and forming a beam with a horizontal beam offset of about 30°.

[0063] 3. When the electromagnetic wave signal is input from the third input port 121 of the second three-branch directional coupler 12, the fourth input port 122 of the second three-branch directional coupler 12 is an isolation port, and basically no signal is output. At this time, the power ratios output from the first, third, sixth, and eighth power dividers are 1:4.4:4.4:1, respectively, and the output phase differences are 0°, 90°, 0°, and 90°, respectively. Adding the phase of the corresponding vibrator 50, the phases of the corresponding radiation surface are 0°, 90°, 180°, and 270°, respectively, meeting the requirements of the phase difference of 90° for multi-beam antenna shaping, and forming a beam with a horizontal beam offset of about 30°.

[0064] Fourth, when the electromagnetic wave signal is input from the fourth input port 122 of the second three-branch directional coupler 12, the third input port 121 of the second three-branch directional coupler 12 is an isolation port, and basically no signal is output. At this time, the power ratios output from the first, third, sixth, and eighth power dividers are 1:4.4:4.4:1, respectively, and the output phase differences are 90°, 0°, 90°, and 0°, respectively. Adding the phase of the corresponding oscillator, the phase of the corresponding radiation surface is 90°, 0°, -90°, and -180°, respectively, which meets the requirements of the phase difference of 90° for multi-beam antenna shaping, and forms a beam with a horizontal beam offset of about 30°.

[0065] In summary, the integrated Butler power divider described in the present invention includes a first Butler power divider and a second Butler power divider, wherein the first Butler power divider includes a first three-branch directional coupler, a first unequal power divider and a second unequal power divider connected to the first three-branch directional coupler, and a plurality of equal power dividers connected to the unequal power divider; the second Butler power divider includes a second three-branch directional coupler, a third unequal power divider and a fourth unequal power divider connected to the second three-branch directional coupler, and a plurality of equal power dividers connected to the unequal power divider. Through the structure and circuit construction of each module, the present invention can not only widen the working frequency band and improve the isolation to meet the communication requirements of broadband; it is simple to assemble and can greatly improve the qualified rate of the third-order passive intermodulation of the antenna; it is low in cost; it can be applied to multi-band multi-beam antennas to realize platform modularization.

[0066] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An integrated Butler power divider, characterized in that: It includes a first Butler power divider and a second Butler power divider, wherein: The first Butler power divider includes a first three-branch directional coupler, a first unequal power divider, a second unequal power divider, a second equal power divider, a fourth equal power divider, a fifth equal power divider and a seventh equal power divider; the first output port and the second output port of the first three-branch directional coupler are respectively connected to the first unequal power divider and the second unequal power divider, the output end of the first unequal power divider is respectively connected to the second equal power divider and the fifth equal power divider, and the output end of the second unequal power divider is respectively connected to the fourth equal power divider and the seventh equal power divider; The second Butler power divider includes a second three-branch directional coupler, a third unequal power divider, a fourth unequal power divider, a first equal power divider, a third equal power divider, a sixth equal power divider and an eighth equal power divider; the third output port and the fourth output port of the second three-branch directional coupler are respectively connected to the third unequal power divider and the fourth unequal power divider, the output end of the third unequal power divider is respectively connected to the first equal power divider and the sixth equal power divider, and the output end of the fourth unequal power divider is respectively connected to the third equal power divider and the eighth equal power divider.

2. The integrated Butler power divider according to claim 1, characterized in that: The first three-branch directional coupler also includes a first input port and a second input port, the first input port and the first output port are arranged on the first branch line, the second input port and the second output port are arranged on the third branch line, the first branch line and the third branch line are both composed of four grounded short-circuit lines with a length of one quarter wavelength, the four short-circuit lines are parallel and have the same spacing, and the four short-circuit lines are cross-coupled in pairs; the first branch line and the third branch line are connected through the second branch line, the second branch line includes four U-shaped lines and a narrow line connected in the middle of the four U-shaped lines, wherein the four U-shaped lines are distributed in pairs up and down, and the two U-shaped lines at the upper end are connected through a wide line and are respectively connected to the first branch line and the third branch line, the two U-shaped lines at the lower end are connected through a wide line and are respectively connected to the first branch line and the third branch line, and the two ends of the narrow line are connected to the U-shaped lines up and down; The second three-branch directional coupler further includes a third input port and a fourth input port, and the second three-branch directional coupler has the same circuit structure as the first three-branch directional coupler.

3. The integrated Butler power divider according to claim 2, characterized in that: The first input port and the second input port are both L-shaped structures and the ends are set as round pads, and the middle of the round pad is used to connect to the coaxial cable core wire of the ground layer; The third input port and the fourth input port have the same structural design as the first input port and the second input port.

4. The integrated Butler power divider according to claim 1, characterized in that: The first unequal power divider includes a fifth input port, a fifth output port and a sixth output port, and the power ratio between the fifth output port and the sixth output port is 1:4.4; the fifth input port is connected to the first output port, and the fifth output port and the sixth output port are connected to the second equal power divider and the fifth equal power divider respectively; The second unequal power divider includes a sixth input port, a seventh output port and an eighth output port, and the power ratio between the seventh output port and the eighth output port is 1:4.4; the sixth input port is connected to the second output port, and the seventh output port and the eighth output port are connected to the seventh equal power divider and the fourth equal power divider respectively; The third unequal power divider includes a seventh input port, a ninth output port and a tenth output port, and the power ratio between the ninth output port and the tenth output port is 1:4.4; the seventh input port is connected to the third output port, and the ninth output port and the tenth output port are connected to the first equal power divider and the sixth equal power divider respectively; The fourth unequal power divider includes an eighth input port, an eleventh output port and a twelfth output port, and the power ratio between the eleventh output port and the twelfth output port is 1:4.4; the eighth input port is connected to the fourth output port, and the eleventh output port and the twelfth output port are respectively connected to the eighth equal power divider and the third equal power divider.

5. The integrated Butler power divider according to claim 1, characterized in that: The first equally divided power divider includes a ninth input port, a thirteenth output port and a fourteenth output port, the power ratio of the thirteenth output port to the fourteenth output port is 1:1; the line of the ninth input port and a ground short-circuit line are on the same vertical line, the line of the thirteenth output port and the line of the fourteenth output port are on the same vertical line, and the lines where the ninth input port, the thirteenth output port and the fourteenth output port are located are connected by a horizontal line; The second equal power divider, the third equal power divider, the fourth equal power divider, the fifth equal power divider, the sixth equal power divider, the seventh equal power divider and the eighth equal power divider all have the same circuit structure design as the first equal power divider.

6. The integrated Butler power divider according to claim 5, characterized in that: The input ports corresponding to the first equal power divider, the third equal power divider, the sixth equal power divider and the eighth equal power divider have the same orientation, which is facing the second three-branch directional coupler; The input ports corresponding to the second equal power divider, the fourth equal power divider, the fifth equal power divider and the seventh equal power divider have the same orientation, which is facing the first three-branch directional coupler; The first equal power divider, the third equal power divider, the fifth equal power divider and the seventh equal power divider are respectively distributed on the left sides of the second equal power divider, the fourth equal power divider, the sixth equal power divider and the eighth equal power divider.

7. The integrated Butler power divider according to claim 6, characterized in that: The first, third, fifth and seventh power dividers have the same spacing between them; the second, fourth, sixth and eighth power dividers have the same spacing between them.

8. The integrated Butler power divider according to any one of claims 1 to 7, characterized in that: The integrated Butler power divider is a PCB microstrip line structure, which is composed of a circuit layer, a dielectric layer, a ground layer, a coaxial cable and an oscillator. The first Butler power divider and the second Butler power divider are arranged on the circuit layer.

9. The integrated Butler power divider according to claim 8, characterized in that: The output port of each equal power divider is connected to the corresponding oscillator through a line, and the phase of the four oscillators respectively connected to the first equal power divider, the second equal power divider, the third equal power divider and the fourth equal power divider is 0 degree, and the phase of the four oscillators respectively connected to the fifth equal power divider, the sixth equal power divider, the seventh equal power divider and the eighth equal power divider is 180 degrees.

10. The integrated Butler power divider according to claim 1, characterized in that: The corresponding ports of the first unequal power divider, the second unequal power divider, the third unequal power divider and the fourth unequal power divider are connected to the corresponding equal power dividers through lines, and the vertically crossed connection lines are avoided by bypassing the back of the ground plate through metal via jumpers.

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