Planar unit multifunctional feed network

Abstract

The invention discloses a planar unit multifunctional feed network, which comprises a feed network printed board, and the feed network printed board comprises four microwave printed boards and two planar units. The four microwave printed boards are connected through three prepregs; the two plane units are connected through foam glue, and the plane units and the microwave printed board are connected through foam glue. According to the invention, the functions of the planar antenna unit, antenna feed, unit distribution / synthesis, unit winding, channel monitoring, antenna protection and the like are integrally designed; interconnection between the feed layer and the antenna unit is reduced, and the profile and the weight of the antenna array plane are greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave antennas, and in particular relates to a planar unit multifunctional feeding network. Background Art

[0002] As active broadband phased array radars are increasingly used, there are extremely high requirements for the weight of the radar and the thickness of the antenna array. In order to reduce the weight and thickness of the radar array, the highly integrated design of the antenna unit and the feed network has become an important part of the radar array system design. The antenna array consists of multiple planar units and a multifunctional feed network.

[0003] The main function of the planar unit multifunctional feeding network is to distribute the high-power signal output by a single 16-channel T / R component to 128 planar antenna units through the feeding network, and radiate it through the antenna units; the signal received by the antenna unit is synthesized through the feeding network and sent to the T / R component for transmission to the back end. At the same time, the feeding network also has the channel monitoring function of the T / R component.

[0004] With the development of technology, airship, airborne and satellite-borne phased array radars require more and more array functions, lower radar profiles and lighter carrying weight, so there is an urgent need for an integrated and lightweight planar unit multifunctional feeding network structure. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a planar unit multifunctional feeding network, including a feeding network printed board, the feeding network printed board includes four microwave printed boards and two planar units; the four microwave printed boards are connected by three semi-cured sheets; the two planar units and the planar units and the microwave printed boards are all connected by foam adhesive.

[0006] Furthermore, an antenna protection port SMP connector, an antenna monitoring port SMP connector, and a T / R component port SMP connector are provided on the upper surface of the feed network printed circuit board.

[0007] Furthermore, the four microwave printed boards are respectively a first microwave printed board, a second microwave printed board, a third microwave printed board, and a fourth microwave printed board; the upper and lower surfaces of the second microwave printed board are respectively provided with a power distribution network layer and a first ground layer.

[0008] Furthermore, the upper and lower surfaces of the third microwave printed board are respectively provided with a second bottom layer, an antenna feeding winding and a monitoring network layer.

[0009] Furthermore, an antenna coupling layer is provided on the lower surface of the fourth microwave printed board.

[0010] Furthermore, the antenna protection port SMP connector, the antenna monitoring port SMP connector, and the T / R component port SMP connector are all surface mount connectors in the form of bent needles, including four tube legs and one bent needle, and the four tube legs pass through the first microwave printed board, the second microwave printed board, the third microwave printed board, and the fourth microwave printed board in sequence.

[0011] Furthermore, the feeding network is, from top to bottom, RA300B04055C, RLP30, RA300B04055#H, RLP30, RA300B04055#H, RLP30, RA300B04055C, foam, RA300B01055C, foam, and RA300B01055C.

[0012] Furthermore, the feeding network integrates the functions of planar antenna unit, antenna feeding, unit distribution / synthesis, unit winding, channel monitoring, and antenna protection.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. Realize integrated design characteristics: The present invention integrates the design of planar antenna unit, antenna feeding, unit distribution / synthesis, unit winding, channel monitoring, antenna protection and other functions;

[0015] 2. Realizing lightweight characteristics: The present invention reduces the interconnection between the feeding layer and the antenna unit through the integrated design of the antenna unit and the functional modules of the feeding network, thereby greatly reducing the cross-section and weight of the antenna array. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 4 is a top view of a feeding network according to an embodiment of the present invention.

[0017] Figure 2 It is a bottom view of the feeding network according to an embodiment of the present invention.

[0018] Figure 3 FIG. 4 is a stacking diagram of a feed network according to an embodiment of the present invention.

[0019] Figure 4 A stacking diagram of a multilayer printed circuit board according to an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of a welded SMP connector according to an embodiment of the present invention.

[0021] The markings in the figure are:

[0022] Feed network printed board 11, antenna protection port SMP connector 12, antenna monitoring port SMP connector 13, T / R component port SMP connector 14, power distribution network layer 301, first stratum 302, second stratum 303, feed winding and monitoring network layer 304, antenna coupling layer 305, first foam 306, second foam 308, first plane unit 307, second plane unit 309, first microwave printed board 310, second microwave printed board 312, third microwave printed board 314, fourth microwave printed board 316, first semi-cured sheet 311, second semi-cured sheet 313, third semi-cured sheet 315, SMP connector 51. DETAILED DESCRIPTION

[0023] The purpose of the present invention is to provide a design of a planar unit multifunctional feeding network. Through an integrated design, the unit feeding, radio frequency signal synthesis and distribution, and channel monitoring functions are realized in terms of electrical performance, and the integrated design of the antenna unit and the feeding network is realized in terms of structure, which greatly reduces the cross-section and weight of the antenna array.

[0024] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0026] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0027] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0028] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0029] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the present application 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 application and are not used to limit the present application.

[0031] like Figure 1 and Figure 2 As shown, the planar unit multifunctional feeding network provided in this embodiment includes a feeding network printed board 11, and the upper surface of the feeding network printed board 11 is labeled with an antenna protection port SMP connector 12, an antenna monitoring port SMP connector 13, and a T / R component port SMP connector 14. Figure 3As shown, the feed network printed board 11 is composed of four microwave printed boards (a first microwave printed board 310, a second microwave printed board 312, a third microwave printed board 314, and a fourth microwave printed board 316), three prepregs (a first prepreg 311, a second prepreg 313, and a third prepreg 315), foams (a first foam 306, a second foam 308) and planar units (a first planar unit 307, a second planar unit 309).

[0032] Four microwave printed boards (first microwave printed board 310, second microwave printed board 312, third microwave printed board 314, fourth microwave printed board 316) are formed into a feed layer printed board through three prepreg sheets (first prepreg sheet 311, second prepreg sheet 313, third prepreg sheet 315) by hot pressing. After the feed layer printed board is formed, the antenna protection port SMP connector 12, the antenna monitoring port SMP connector 13, and the T / R component port SMP connector 14 are assembled, and then the foam (first foam 306, second foam 308) and the planar antenna unit (first planar unit 307, second planar unit 309) are glued. The internal planar unit and the feed layer of the feed network are realized by the gluing process, and the functional modules of the feed layer are realized by the multi-layer board hot pressing process. The above design forms continuously reduce the weight of the antenna array and reduce the profile height of the antenna array. At present, this type of feed network is widely used in various airborne and satellite-borne radar arrays.

[0033] The feed layer printed circuit board functionally includes a power distribution network layer 301, a first ground layer 302, a second bottom layer 303, an antenna feed winding and a monitoring network layer 304, and an antenna coupling layer 305; the upper and lower surfaces of the second microwave printed circuit board 312 are respectively the power distribution network layer 301 and the first ground layer 302; the upper and lower surfaces of the third microwave printed circuit board 314 are respectively the second bottom layer 303, the antenna feed winding and the monitoring network layer 304; the lower surface of the fourth microwave printed circuit board 316 is the antenna coupling layer 305.

[0034] The planar unit multifunctional feeding network has the characteristics of an integrated design, and integrates the functions of planar antenna unit, antenna feeding, unit distribution / synthesis, unit winding, channel monitoring, and antenna protection. The planar unit multifunctional feeding network has the characteristics of quick plug-in and pull-out for interconnection with T / R components. All network output ports can realize high and low frequency quick plug-in and pull-out with T / R components through elastic SMP double-female connectors. The planar unit multifunctional feeding network has the characteristics of being lightweight. Through the integrated design of antenna unit and feeding layer, the interconnection links are reduced, and the cross-section and weight of the antenna array are reduced.

[0035] like Figure 4As shown, this is a stacked structure diagram of the planar unit multifunctional feeding network of this embodiment. The planar unit multifunctional feeding network is from top to bottom: RA300B04055C, RLP30, RA300B04055#H, RLP30, RA300B04055#H, RLP30, RA300B04055C, foam board, RA300B01055C, foam board, RA300B01055C.

[0036] like Figure 5 As shown, a schematic diagram of an SMP connector 51 (including an antenna protection port SMP connector 12, an antenna monitoring port SMP connector 13, and a T / R component port SMP connector 14) of a planar unit multifunctional feeding network is shown. The SMP connector 51 is in the form of a bent needle, including four tube legs and one bent needle, and is a high-stability surface mount connector; the four tube legs of the SMP connector 51 pass through the first microwave printed board 310, the second microwave printed board 312, the third microwave printed board 314, and the fourth microwave printed board 316 in sequence, and the SMP connector 51 can meet the low-temperature performance of the feeding network.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. Realize integrated design characteristics: The present invention integrates the design of planar antenna unit, antenna feeding, unit distribution / synthesis, unit winding, channel monitoring, antenna protection and other functions;

[0039] 2. Realizing lightweight characteristics: The present invention reduces the interconnection between the feeding layer and the antenna unit through the integrated design of the antenna unit and the functional modules of the feeding network, thereby greatly reducing the cross-section and weight of the antenna array.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A planar unit multifunctional feeding network, characterized in that: The invention comprises a feed network printed board (11), wherein the feed network printed board (11) comprises four microwave printed boards and two planar units; the four microwave printed boards are connected by (3) prepreg sheets; the two planar units and the planar units and the microwave printed boards are connected by foam adhesive.

2. The planar unit multifunctional feeding network according to claim 1, characterized in that: The upper surface of the feed network printed board (11) is provided with an antenna protection port SMP connector (12), an antenna monitoring port SMP connector (13), and a T / R component port SMP connector (14).

3. The planar unit multifunctional feeding network according to claim 1, characterized in that: The four microwave printed boards are respectively a first microwave printed board (310), a second microwave printed board (312), a third microwave printed board (314), and a fourth microwave printed board (316); the upper and lower surfaces of the second microwave printed board (312) are respectively provided with a power distribution network layer (301) and a first ground layer (302).

4. The planar unit multifunctional feeding network according to claim 3, characterized in that: The upper and lower surfaces of the third microwave printed board (314) are respectively provided with a second bottom layer (303), an antenna feeding winding and a monitoring network layer (304).

5. The planar unit multifunctional feeding network according to claim 3, characterized in that: An antenna coupling layer (305) is provided on the lower surface of the fourth microwave printed board (316).

6. The planar unit multifunctional feeding network according to claim 2 or 3, characterized in that: The antenna protection port SMP connector (12), the antenna monitoring port SMP connector (13), and the T / R component port SMP connector (14) are all bent-needle surface-mount connectors, including four tube legs and one bent needle, and the four tube legs sequentially pass through the first microwave printed board (310), the second microwave printed board (312), the third microwave printed board (314), and the fourth microwave printed board (316).

7. The planar unit multifunctional feeding network according to claim 1, characterized in that: The feeding network is, from top to bottom, RA300B04055C, RLP30, RA300B04055#H, RLP30, RA300B04055#H, RLP30, RA300B04055C, foam, RA300B01055C, foam, and RA300B01055C.

8. The planar unit multifunctional feeding network according to claim 1, characterized in that: The feeding network integrates the functions of planar antenna unit, antenna feeding, unit distribution / synthesis, unit winding, channel monitoring and antenna protection.

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