Ridge waveguide broadband sum-difference device with compact structure

Abstract

The invention relates to the technical field of sum-difference devices, and particularly discloses a ridge waveguide broadband sum-difference device with a compact structure. In the sum-difference device, a feed unit adopts a coaxial structure, a coaxial connector of the feed unit is combined with a cavity of the sum-difference device, and a pin head of the connector is jacked into a metal conductor in the cavity of the sum-difference device to excite and generate a signal; the feed unit adopts the outer skin of the coaxial connector and the cavity shell to be grounded, and all the feed ports are in the same plane; according to the feed structure, the space occupied by the sum-difference device can be saved, the coaxial connector can be connected in an opposite insertion mode, and the stability between the sum-difference device and an antenna system is improved; the ridge waveguide structure is integrally in the shape of an inverted Chinese character'ao ', the use bandwidth can be increased through the through arrangement of the ridge waveguide, the equivalent impedance of the ridge waveguide structure is low, the ridge waveguide structure can be easily matched with a low-impedance coaxial line, and the ridge waveguide structure is quite suitable for being used in a radar system.

Description

Technical Field

[0001] The invention relates to the field of radar technology, and in particular to a ridge waveguide broadband summator with a compact structure. Background Art

[0002] The summator is an important device in microwave, millimeter wave circuits and antenna systems. Its performance directly affects important indicators such as radar tracking accuracy and tracking distance. Under certain conditions, the summator is often required to have structural dimensions. For example, in airborne and vehicle-mounted antenna systems, the summator is required to be small in size and be integrated with the transceiver, which greatly restricts the structure of the summator. At the same time, when the production batch is relatively large, the summator is required to be simple to process and easy to debug.

[0003] Therefore, there is an urgent need for a summator with both high performance and production efficiency. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a compact ridge waveguide broadband summator, the overall structure of the summator is planarized and miniaturized, the feeding unit is novel, and the ridge waveguide structure is used to widen the bandwidth of the summator.

[0005] In the first aspect, an embodiment of the present invention provides a compact ridge waveguide broadband summator, characterized in that it includes a summator, a ridge waveguide and a feeding unit; the summator is in a "cross" structure, and the interior of the summator is arranged as a cavity; the summator preferably includes a metal conductor; the metal conductor is arranged in the cavity at the four ends of the "cross" structure of the summator, and at least two of the metal conductors are arranged at each end; the ridge waveguide is arranged in the cavity of the summator, and the ridge waveguide structure as a whole presents an inverted "concave" shape, and the cavity at each end of the summator is provided with at least two parallel "concave" ridge waveguides; the ridge waveguides on each adjacent side of the summator are perpendicular to each other and interconnected; the feeding unit is arranged at the four ends of the "cross" structure of the summator, and the feeding unit includes a plurality of feeding ports and connectors; at least two of the feeding ports are arranged at each end of the summator; the connector includes a needle.

[0006] As a preferred technical solution of this embodiment, the connector includes a coaxial connector; the needle electrically connects the connector with the metal conductor by pushing in, and generates a signal through excitation.

[0007] As a preferred technical solution of this embodiment, the feeding unit adopts a coaxial structure, and the coaxial connector of the feeding unit is electrically connected to the cavity of the summator; the feeding unit is grounded to the cavity shell of the summator through the outer skin of the coaxial connector.

[0008] As a preferred technical solution of this embodiment, all the feeding ports are on the same plane.

[0009] As a preferred technical solution of this embodiment, the feed ports are provided with feed ports I-VIII in a counterclockwise direction on the summator; among which port IV is a pitch difference port, port VII is a sum port, and port VIII is an azimuth difference port.

[0010] As the preferred technical solution of this embodiment, the maximum amplitude difference of the pitch difference port is 0.35, and the average frequency difference loss is 0.3; the phase fluctuation within the combination of port I and port VI and port II and port V is within 10°, and the phase difference between the two groups of ports is 180°±10°.

[0011] As a preferred technical solution of this embodiment, the maximum amplitude difference at the port VIII is 0.34, and the average frequency difference loss is 0.3.

[0012] As a preferred technical solution of this embodiment, the maximum amplitude difference at port VII is 0.24, the average frequency difference is 0.3, and the maximum phase fluctuation of port I, port II1, port V and port VI is within ±10°.

[0013] In a second aspect, a receiving device is provided, characterized in that it includes an adder and subtractor as described in any one of the above items.

[0014] In summary, the beneficial effects of the present invention are as follows:

[0015] In order to solve the above technical problems, an embodiment of the present invention provides a compact ridge waveguide broadband summator, in which a feed unit adopts a coaxial structure, the coaxial connector of the feed unit is combined with the summator cavity, and the needle of the connector is pushed into the metal conductor in the summator cavity to stimulate the generation of signals; the feed unit adopts the outer skin of the coaxial connector and the cavity shell to be grounded, and all the feed ports are in the same plane; this feeding structure can save the space occupied by the summator, and the coaxial connector can be connected in a plug-in manner to increase the stability between the summator and the antenna system; the ridge waveguide structure as a whole presents an inverted "concave" shape, and the through-setting of the ridge waveguide can increase the use bandwidth, and its equivalent impedance is low, which is easy to match with the low-impedance coaxial line, and is very suitable for use in radar systems; and the overall structure of the summator is planarized and miniaturized; the feeding structure is novel and fully combined with the summator, and the ridge waveguide structure is used to widen the bandwidth of the summator to more than 10%. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0017] Figure 1 It is a schematic diagram of the structure of a compact ridge waveguide broadband sum-and-difference device;

[0018] Figure 2 It is a schematic diagram of the local structure of a compact ridge waveguide broadband sum-and-difference device;

[0019] Figure 3 It is a standing wave diagram of each output port of a compact ridge waveguide broadband sum-difference device;

[0020] Figure 4 It is a pitch difference port amplitude curve of a compact ridge waveguide broadband sum-difference device;

[0021] Figure 5 It is a phase curve of the elevation difference port of a compact ridge waveguide broadband sum-difference device;

[0022] Figure 6 It is a compact ridge waveguide broadband sum-difference device with a position difference port amplitude curve.

[0023] Figure 7 It is a compact ridge waveguide broadband sum-and-difference device with a phase curve of the azimuth difference port;

[0024] Figure 8 It is a compact ridge waveguide broadband sum-difference device and port amplitude curve;

[0025] Fig. 9 It is a compact ridge waveguide broadband sum-difference device and port phase curve;

[0026] Parts and numbers in the figure: 10- sum and difference device, 12- feed port, 13- ridge waveguide, 14- needle, 15- metal conductor, 16- cavity, 17- shell. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the various features in the embodiments and examples of the present invention can be combined with each other, all within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figure 1 and Figure 2 The embodiment of the present invention provides a compact ridge waveguide broadband summator, characterized in that it includes a summator 10, a ridge waveguide 13 and a feed unit 0; the summator 10 is in a "cross" structure, and the summator 10 is provided with a cavity; the summator 10 preferably includes a metal conductor 15; the metal conductor 15 is provided in the cavity 16 at the four ends of the "cross" structure of the summator, and at least two metal conductors 15 are provided at each end; the ridge waveguide 13 is provided in the cavity 16 of the summator 10 The ridge waveguide 13 structure as a whole presents an inverted "concave" shape, and the cavity 16 at each end of the summator 10 is provided with at least two parallel "concave" shaped ridge waveguides 13; the ridge waveguides 13 on each adjacent side of the summator 10 are perpendicular to each other and interconnected; the feeding unit is arranged at the four ends of the "cross" structure of the summator 10, and the feeding unit includes a plurality of feeding ports and connectors; each end of the summator 10 is provided with at least two feeding ports; the connector includes a needle 14.

[0030] As a preferred technical solution of this embodiment, the connector includes a coaxial connector; the needle 14 electrically connects the connector with the metal conductor by pushing in, and generates a signal by excitation;

[0031] As a preferred technical solution of this embodiment, the feeding unit adopts a coaxial structure, and the coaxial connector of the feeding unit 0 is electrically connected to the cavity of the summator 10; the feeding unit is grounded to the cavity shell of the summator 10 through the outer skin of the coaxial connector.

[0032] As a preferred technical solution of this embodiment, all the feeding ports are on the same plane.

[0033] As a preferred technical solution of this embodiment, the feed port is provided with feed ports Ⅰ-Ⅷ on the summator 10 in a counterclockwise direction; wherein port Ⅳ is a pitch difference port, port Ⅶ is a sum port, and port Ⅷ is an azimuth difference port; as a preferred technical solution of this embodiment, the maximum amplitude difference of the pitch difference port is 0.35, and the average frequency difference loss is 0.3; the phase fluctuation within the combination of port Ⅰ and port Ⅵ and port Ⅱ and port Ⅴ is within 10°, and the phase difference between the two groups of ports is 180°±10°; as a preferred technical solution of this embodiment, the maximum amplitude difference at port Ⅷ is 0.34, and the average frequency difference loss is 0.3; as a preferred technical solution of this embodiment, the maximum amplitude difference at port Ⅶ is 0.24, and the average frequency difference loss is 0.3, and the maximum phase fluctuation of port Ⅰ, port Ⅱ1, port Ⅴ and port Ⅵ is within ±10°; maintaining good amplitude consistency;

[0034] All the feeding ports of the summator 10 are in the same plane, which is easy to integrate with other system parts. If used in the Ku band, the overall height of the summator 10 can be controlled within 6 mm; the output signal of port IV is (1+6)-(2+5), the port VII is the sum port, and the output signal is (1+2+5+6), the port VIII is the azimuth difference, and the output signal of port VIII is (1+2)-(5+6).

[0035] In a second aspect, a receiving device is provided, characterized in that it includes an adder and subtractor as described in any one of the above items.

[0036] Example 2

[0037] See also Figure 1 and Figure 2The embodiment of the present invention provides a compact ridge waveguide broadband summator and differencer. In the summator and differencer 10, the feeding unit adopts a coaxial structure, the coaxial connector of the feeding unit 0 is combined with the cavity of the summator and differencer 10, and the needle of the connector is inserted into the metal conductor 15 in the cavity of the summator and differencer 10 to stimulate the generation of signals; the feeding unit adopts the outer skin of the coaxial connector and the cavity shell to be grounded, and all the feeding ports are in the same plane; this feeding structure can save the space occupied by the summator and differencer, and the coaxial connector can be used for The ridge waveguide structure is connected by plugging, which increases the stability between the summator and the antenna system; the ridge waveguide structure as a whole presents an inverted "concave" shape, and the through-setting of the ridge waveguide 13 can increase the usable bandwidth. Its equivalent impedance is low and it is easy to match with the low-impedance coaxial line, which is very suitable for use in radar systems; and the overall structure of the summator 10 is planarized and miniaturized; the feeding structure is novel and fully integrated with the summator, and the ridge waveguide structure is used to widen the bandwidth of the summator 10 to more than 10%, and the specific measured value is at least more than 10.84%.

[0038] The meanings of the performance curves of the summator and subtractor are as follows:

[0039] The standing wave curves of each output port are shown in the figure below: Figure 3 As shown, the fluctuation range of the standing wave value of each port is 1.14±0.07, maintaining good and stable standing wave characteristics;

[0040] The amplitude imbalance curve at the pitch difference port and port IV is as follows: Figure 4 As shown, the maximum amplitude difference is 0.35, and the average frequency difference is about 0.3, maintaining good amplitude consistency.

[0041] Figure 5 This is the phase curve at port IV. It can be seen that the phase fluctuations between ports I and VI, and between ports II and V are within 10°, and the phase difference between the two groups of ports is 180°±10°.

[0042] Azimuth difference port, the amplitude imbalance curve at the port is as follows Figure 6 As shown, the maximum amplitude difference is 0.34, and the average frequency difference is about 0.3, maintaining good amplitude consistency;

[0043] Figure 7 This is the phase curve at port VIII. It can be seen that the phase fluctuation between ports I and II, and between ports VI and V, is within 10° within the combination, and the phase difference between the two groups of ports is 180°±10°.

[0044] and ports, the amplitude imbalance curve at port Ⅶ is as follows Figure 8 As shown, the maximum amplitude difference is 0.24, and the average frequency difference is about 0.3, maintaining good amplitude consistency;

[0045] Fig. 9 3 is the phase curve at the port VIII. It can be seen that the maximum phase fluctuation of the port I, port II1, port V and port VI is within ±10°.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0047] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A compact ridge waveguide broadband summator, characterized in that: It includes a summator, a ridge waveguide and a feeding unit; The summator and the differential device are in a "cross" structure, and the interior of the summator and the differential device is provided with a cavity; the summator and the differential device preferably include a metal conductor; the metal conductor is arranged in the cavity at the four ends of the "cross" structure of the summator and the differential device, and at least two metal conductors are arranged at each end; The ridge waveguide is arranged in the cavity of the summator and the ridge waveguide structure as a whole presents an inverted "concave" shape. The cavity at each end of the summator and the differencer is provided with at least two parallel "concave" ridge waveguides; the ridge waveguides on each adjacent side of the summator and the differencer are perpendicular to each other and interpenetrate each other; The feeding unit is arranged at the four ends of the "cross" structure of the summator and the differential device, and the feeding unit includes a plurality of feeding ports and a connector; at least two feeding ports are arranged at each end of the summator and the differential device; and the connector includes a needle.

2. The summator according to claim 1, characterized in that: The connector includes a coaxial connector; the needle electrically connects the connector with the metal conductor by pushing in, and generates a signal by excitation.

3. The summator according to claim 2, characterized in that: The feeding unit adopts a coaxial structure, and the coaxial connector of the feeding unit is electrically connected to the cavity of the summator; the feeding unit is grounded to the cavity shell of the summator through the outer skin of the coaxial connector.

4. The summator according to claim 2, characterized in that: All the feeding ports are on the same plane.

5. The summator according to claim 1, characterized in that: The feed port is provided with feed ports I-VIII in a counterclockwise direction on the summator; Among them, port IV is the pitch difference port, port VII is the sum port, and port VIII is the azimuth difference port.

6. The summator according to claim 5, characterized in that: The maximum amplitude difference of the pitch difference port is 0.35, and the average frequency difference loss is 0.3; the phase fluctuation within the combination of port I and port VI and port II and port V is within 10°, and the phase difference between the two groups of ports is 180°±10°.

7. The summator according to claim 5, characterized in that: The maximum amplitude difference at the port VIII is 0.34, and the average frequency difference is 0.

3.

8. The summator according to claim 5, characterized in that: The maximum amplitude difference at the port VII is 0.24, the average frequency difference loss is 0.3, and the maximum phase fluctuation of the port I, port II1, port V and port VI is within ±10°.

9. A receiving device, characterized in that: It comprises the summator as claimed in any one of claims 1 to 8.

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