An antenna quick switching device of a feed antenna platform and a feed antenna platform

Abstract

This invention relates to a rapid antenna switching device for a feed antenna platform and the feed antenna platform itself. The rapid antenna switching device includes a bracket, a base plate, and an adapter. The bracket is mounted on the back plate of the feed antenna platform. The base plate is fixed to the bracket via mounting holes, allowing adjustment of its position on the bracket as needed. The adapter is mounted on the base plate, and the feed antenna connector is connected to one end of the adapter. A coaxial cable extending from the feed antenna platform is connected to the other end of the adapter via the connector. When switching to a feed antenna operating at a different frequency band is required, simply connect the coaxial cable to the adapter connected to the feed antenna of that frequency band. This achieves rapid switching between feed antennas of different frequency bands, avoiding loosening and damage to the antenna interface caused by frequent disassembly and replacement. It also ensures tightness of the feed line connection, guarantees testing accuracy, and improves testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of microwave testing technology, and in particular to a fast antenna switching device and a feed antenna platform for a feed antenna platform. Background Technology

[0002] With the rapid development of stealth and radar technologies, the requirements for RCS measurement are becoming increasingly stringent, necessitating superior performance from compact-field anechoic chambers. The quiet zone of a compact-field anechoic chamber is a crucial indicator of its quality, and two key factors directly affecting its quiet zone performance are the reflector and the feed source. The reflector requires extremely high machining precision; ensuring this precision, along with proper post-processing, guarantees excellent performance of the compact-field anechoic chamber across a wide frequency range.

[0003] Feed antennas are equally important for the quiet zone performance of a compact anechoic chamber. Although ultra-wideband antenna technology is relatively mature, its performance difference between low and high frequencies is still significant, making it difficult to complete ultra-wideband testing within a compact anechoic chamber using only one or two pairs of feed antennas. Therefore, current compact anechoic chambers still require combinations of multiple broadband feed antennas to achieve ultra-wideband RCS testing capabilities.

[0004] Using multiple broadband feed antennas in combination leads to frequent feed antenna replacements, which is extremely inconvenient and significantly reduces testing efficiency. Furthermore, feed antennas are precision components; frequent disassembly can cause loosening or damage to the antenna interfaces, affecting measurement accuracy. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a fast antenna switching device and a feed antenna platform for a feed antenna platform, which solves the problem in the prior art that frequent replacement of feed antennas is inconvenient and easily leads to loose and damaged interfaces.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, in a first aspect, the present invention provides an antenna fast switching device for a feed antenna platform, comprising:

[0009] The bracket is long and narrow, with one end mounted on the back plate of the feed antenna platform and the other end facing away from the back plate of the feed antenna platform, used to fix the feed antenna.

[0010] The adapter has one end for detachable connection to the coaxial cable extending from the feed antenna platform, and the other end for connection to the feed antenna.

[0011] The substrate has mounting holes that match the outer contour of the bracket and mounting interfaces for mounting adapters. The substrate is fixed to the bracket by fitting through the mounting holes. The substrate is located between the feed antenna and the back plate of the feed antenna platform, and the spacing between the substrate and the back plate of the feed antenna platform can be adjusted by moving along the length of the bracket.

[0012] Optionally, the cross-section of the bracket is cross-shaped.

[0013] Optionally, the substrate is composed of multiple split plates spliced ​​together. The splicing ends of the split plates are provided with notches. Two adjacent split plates are fixed together by a connecting plate. The split plates are provided with connecting through holes, and the connecting plate is provided with connecting holes that match the connecting through holes of two adjacent split plates. The two adjacent split plates are fixed together by bolts passing through the connecting holes and connecting through holes.

[0014] Once the separate panels are assembled, the notches form mounting holes.

[0015] Optionally, the substrate is composed of two separate plates spliced ​​together, the two separate plates are fixed by two connecting plates, and the splicing seam between the two separate plates is distributed between the two connecting plates.

[0016] Optionally, the antenna fast switching device further includes at least two adjustment limiting structures. The adjustment limiting structure includes an adjustment block and an adjustment screw. The adjustment block includes a mounting plate and an adjustment plate. One end of the mounting plate and the adjustment plate are vertically connected. The mounting plate is fixedly mounted on the substrate. The adjustment plate is provided with a threaded hole. The adjustment screw is threadedly connected to the threaded hole. When it is necessary to fix the substrate to the bracket, the adjustment screw is rotated to make the adjustment screw abut against the bracket. When it is necessary to move the substrate relative to the bracket, the adjustment screw is rotated to make the adjustment screw disengage from the bracket.

[0017] Alternatively, the number of mounting interfaces may exceed the number of feed antennas.

[0018] Optionally, the mounting interface includes a connector through hole for the adapter to pass through, and a plurality of connector fixing holes surrounding the connector through hole for mounting the adapter in conjunction with screws.

[0019] In a second aspect, the present invention also provides a feed antenna platform, including a feed antenna platform backplate;

[0020] Multiple feeds are distributed on the back panel of the feed antenna platform. Each feed is connected to a coaxial cable, which extends out of the back panel of the feed antenna platform.

[0021] Multiple feed antennas, with at least some of the feed antennas operating in different frequency bands; and an antenna fast switching device for any implementation of the first aspect.

[0022] (III) Beneficial Effects

[0023] The above-mentioned technical solution of the present invention has the following advantages: The antenna quick switching device for the feed antenna platform provided by the present invention includes a bracket, a base plate, and an adapter. The bracket is installed on the back plate of the feed antenna platform, and the base plate is fixed on the bracket through mounting holes. The position of the base plate on the bracket can be adjusted as needed to ensure that the distance between the adapter on the base plate and the back plate of the feed antenna platform and the feed antenna meets the requirements. The adapter is installed on the base plate, and the connector of the feed antenna is connected to one end of the adapter. The coaxial cable extending from the feed antenna platform is connected to the other end of the adapter through the connector. When it is necessary to switch to a feed antenna of a different operating frequency band, it is only necessary to connect the coaxial cable to the adapter connected to the feed antenna of that operating frequency band. This realizes quick switching of feed antennas of different frequency bands, avoids loosening and damage to the antenna interface caused by frequent disassembly and replacement, ensures tightness of the feed line connection, guarantees test accuracy, and improves test efficiency. Attached Figure Description

[0024] The accompanying drawings are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not be consistent with the actual product.

[0025] Figure 1 This is a schematic diagram of the antenna fast switching device structure of a feed antenna platform according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the antenna fast switching device from another angle;

[0027] Figure 3 This is a schematic diagram of the antenna fast switching device structure of another feed antenna platform in an embodiment of the present invention;

[0028] Figure 4 yes Figure 3 A schematic diagram of the antenna fast switching device from another angle;

[0029] Figure 5 yes Figure 3 A schematic diagram of the decomposed structure of the substrate;

[0030] Figure 6 This is a schematic diagram of the structure of a feed antenna platform according to an embodiment of the present invention.

[0031] In the picture:

[0032] 1: Antenna fast switching device;

[0033] 11: Bracket;

[0034] 12: Substrate;

[0035] 121: Mounting hole;

[0036] 122: Installation interface;

[0037] 1221: Connector through hole;

[0038] 1222: Connector fixing hole;

[0039] 123: Split board;

[0040] 124: Connecting plate;

[0041] 13: Adapter;

[0042] 14: Adjust the limiting structure;

[0043] 141: Adjusting block;

[0044] 142: Adjusting screw;

[0045] 2: Backplate of the feed antenna platform;

[0046] 3: Feed source;

[0047] 4: Coaxial cable;

[0048] 41: Rigid cable;

[0049] 42: Flexible cable. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] See Figure 1 As shown, the antenna fast switching device 1 of the feed antenna platform provided in this embodiment of the invention includes a bracket 11, a substrate 12 and an adapter 13.

[0052] The bracket 11 is long and narrow, with one end mounted on the back plate of the feed antenna platform and the other end facing away from the back plate of the feed antenna platform, used to fix the feed antenna.

[0053] See Figure 1 and Figure 2As shown, the substrate 12 has mounting holes 121 that match the outer contour of the bracket 11 and mounting interfaces 122 for mounting the adapter 13. The substrate 12 is fixed to the bracket 11 through the mounting holes 121. The substrate 12 is located between the feed antenna and the back plate of the feed antenna platform, and the spacing between the substrate 12 and the back plate of the feed antenna platform can be adjusted by moving it along the length of the bracket 11. One end of the adapter 13 is used for detachable connection with the coaxial cable extending from the feed antenna platform, and the other end is used for connection with the feed antenna.

[0054] See Figure 6 As shown, during use, the bracket 11 is installed on the back plate 2 of the feed antenna platform. The position of the base plate 12 on the bracket 11 is adjusted as needed to ensure that the distance between the upper adapter 13 of the base plate 12 and the back plate 2 of the feed antenna platform and the feed antenna (not shown in the figure) meets the requirements. The adapter 13 is installed on the base plate 12, and the feed antenna is fixed in position by the bracket 11. The connector of the feed antenna is connected to one end of the adapter 13, and the coaxial cable 4 extending from the feed antenna platform is connected to the other end of the adapter 13 through the connector. That is, the coaxial cable 4 is connected to the required feed antenna through the adapter 13. When it is necessary to switch to a feed antenna of a different operating frequency band, simply connect the coaxial cable 4 to the adapter connected to the feed antenna of that operating frequency band. This enables rapid switching of feed antennas of different frequency bands, avoids loosening and damage to the antenna interface caused by frequent disassembly and replacement, ensures tightness of the feed line connection, guarantees test accuracy, and improves test efficiency.

[0055] To facilitate the fixing of the substrate 12 and the bracket 11, and to minimize weight while ensuring the strength of the bracket 11, in an optional embodiment, see [reference needed]. Figure 1 As shown, the cross-section of the bracket 11 is cross-shaped. Correspondingly, the mounting hole 121 is also cross-shaped.

[0056] To facilitate the installation and replacement of the substrate 12 and avoid numerous sequential requirements for component installation, in some optional embodiments, see [reference needed]. Figures 3-5 As shown, the substrate 12 is composed of multiple split plates 123. The splicing ends of the split plates 123 have notches. Adjacent split plates 123 are fixed together by a connecting plate 124. Each split plate 123 has a connecting through hole, and the connecting plate 124 has connecting holes that match the connecting through holes of the two adjacent split plates 123. Two adjacent split plates 123 are fixed together by bolts passing through the connecting holes and connecting through holes to form the substrate 12. When the split plates 123 are assembled, the notches form mounting holes 121. This structure eliminates the need to consider the installation sequence of the substrate 12, allowing for easy installation and disassembly without affecting other components. It also facilitates the replacement of some of the split plates 123 of the substrate 12.

[0057] In some preferred embodiments, see Figures 3-5 As shown, the substrate 12 is composed of two separate plates 123 spliced ​​together. The two separate plates 123 are fixed by two connecting plates 124, and the splicing seams of the two separate plates 123 are distributed between the two connecting plates 124.

[0058] To facilitate adjustment of the position of the substrate 12 on the support 11 and to reliably fix the substrate after it is adjusted to a suitable position, in some preferred embodiments, see [reference needed]. Figure 4 and Figure 5 As shown, the antenna fast switching device 1 also includes at least two adjustment limiting structures 14. Each adjustment limiting structure 14 includes an adjustment block 141 and an adjustment screw 142. The adjustment block 141 includes a mounting plate and an adjustment plate, with one end of the mounting plate and the adjustment plate vertically connected to form an L-shape. The mounting plate is fixedly mounted on the substrate 12. The adjustment plate has threaded holes, and the adjustment screw 142 is threadedly connected to the threaded holes. When it is necessary to fix the substrate 12 to the bracket 11, rotating the adjustment screw 142 causes it to abut against the bracket 11, thus achieving fixation. When it is necessary for the substrate to move relative to the bracket 11, rotating the adjustment screw 142 causes it to gradually disengage from the bracket 11. Preferably, multiple adjustment limiting structures 14 are spaced apart to make the limiting more stable; for example, they can be symmetrically spaced or evenly distributed circumferentially. When the cross-section of the bracket 11 is cross-shaped, preferably, there are four adjustment limiting structures 14, distributed at the included angles of the "cross".

[0059] To facilitate expansion and improve reliability, in some embodiments, the number of mounting interfaces 122 provided on the substrate 12 is greater than the number of feed antennas, serving as backup mounting interfaces to install specific adapters or spare adapters.

[0060] In this embodiment, the mounting interface 122 for installing the adapter 13 can be opened according to the structure and fixing method of the adapter 13, and is not limited here. For example, in an optional embodiment, the mounting interface 122 includes a connector through hole 1221 for the adapter 13 to pass through, and a plurality of connector fixing holes 1222 surrounding the connector through hole 1221 for fixing the mounting base of the adapter 13 with screws.

[0061] See Figure 6As shown, a feed antenna platform is also provided, including a feed antenna platform backplate 2, multiple feeds 3 distributed on the feed antenna platform backplate, and multiple feed antennas (not shown in the figure). Each feed 3 is connected to a coaxial cable 4, which extends out of the feed antenna platform backplate 2 and has a connector that matches the adapter 13. At least some of the multiple feed antennas operate in different frequency bands to enable ultra-wideband RCS (Radar Cross Section) testing capability, meeting the requirements for ultra-wideband testing in a compact anechoic chamber. In addition, the feed antenna platform also includes an antenna fast switching device 1, which can be any of the antenna fast switching devices 1 described in the above embodiments, and will not be elaborated further here. After setting up the antenna quick switching device 1, the adapter 13 is mounted on the base plate. The feed antenna is fixed in position by the bracket 11. The connector of the feed antenna is connected to one end of the adapter 13, and the coaxial cable 4 extending from the feed antenna platform is connected to the other end of the adapter 13 through the connector. The position of the base plate 12 on the bracket 11 can be adjusted as needed. When switching to a feed antenna of a different operating frequency band, simply connect the coaxial cable 4 to the adapter connected to the feed antenna of that operating frequency band. This achieves quick switching between feed antennas of different frequency bands, avoids loosening and damage to the antenna interface caused by frequent disassembly and replacement, ensures tightness of the feed line connection, guarantees test accuracy, and improves test efficiency.

[0062] To facilitate switching operations, in some preferred embodiments, the coaxial cable 4 includes two sections, one of which is a rigid cable 41 that extends from the back plate 2 of the feed antenna platform, and the other is a flexible cable 42, with one end connected to the rigid cable 41 and the other end detachably connected to the adapter 13 via a matching connector.

[0063] In order to minimize the impact on testing and facilitate the distribution of the components required for testing, in an optional embodiment, the bracket 11 is installed at the center of the back plate 2 of the feed antenna platform, and the mounting hole 121 is located at the center of the substrate 12.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that not every embodiment contains only one independent technical solution, and in the absence of conflict between solutions, the various technical features mentioned in each embodiment can be combined in any way to form other implementation methods that can be understood by those skilled in the art.

[0065] Furthermore, without departing from the scope of the present invention, modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some of the technical features, shall not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fast antenna switching device for a feed antenna platform, characterized in that, include: The bracket is long and narrow, with one end mounted on the back plate of the feed antenna platform and the other end facing away from the back plate of the feed antenna platform, for fixing the feed antenna. An adapter, one end of which is detachably connected to the coaxial cable extending from the feed antenna platform, and the other end of which is connected to the feed antenna; The substrate has mounting holes that match the outer contour of the bracket and mounting interfaces for mounting the adapter. The substrate is fixed to the bracket through the mounting holes. The substrate is located between the feed antenna and the back plate of the feed antenna platform, and the spacing between the substrate and the back plate of the feed antenna platform can be adjusted by moving along the length direction of the bracket.

2. The antenna fast switching device according to claim 1, characterized in that: The cross-section of the bracket is cross-shaped.

3. The antenna fast switching device according to claim 1 or 2, characterized in that: The substrate is composed of multiple split plates spliced ​​together. The splicing ends of the split plates are provided with notches. Two adjacent split plates are fixed together by a connecting plate. The split plates are provided with connecting through holes. The connecting plate is provided with connecting holes that match the connecting through holes of two adjacent split plates. Two adjacent split plates are fixed together by bolts passing through the connecting holes and the connecting through holes. When the split panels are assembled, the notch forms the mounting hole.

4. The antenna fast switching device according to claim 3, characterized in that: The substrate is composed of two separate plates spliced ​​together, the two separate plates are fixed by two connecting plates, and the splicing seams of the two separate plates are distributed between the two connecting plates.

5. The antenna fast switching device according to claim 1, characterized in that: It also includes at least two adjustment limiting structures, each including an adjustment block and an adjustment screw. The adjustment block includes a mounting plate and an adjustment plate, with one end of the mounting plate and the adjustment plate perpendicularly connected. The mounting plate is fixedly mounted on the base plate, and the adjustment plate has a threaded hole. The adjustment screw is threadedly connected to the threaded hole. When it is necessary to fix the base plate to the bracket, the adjustment screw is rotated to make the adjustment screw abut against the bracket. When it is necessary to move the base plate relative to the bracket, the adjustment screw is rotated to make the adjustment screw disengage from the bracket.

6. The antenna fast switching device according to claim 1, characterized in that: The number of mounting interfaces is greater than the number of feed antennas.

7. The antenna fast switching device according to claim 1 or 6, characterized in that: The mounting interface includes a connector through hole for the adapter to pass through, and a plurality of connector fixing holes surrounding the connector through hole for fixing the mounting base of the adapter with screws.

8. A feed antenna platform, characterized in that, include: Backplate of the feed antenna platform; Multiple feed sources are distributed on the back panel of the feed antenna platform, and each feed source is connected to a coaxial cable, which extends out of the back panel of the feed antenna platform. Multiple feed antennas, and at least some of the feed antennas operate in different frequency bands; as well as The antenna fast switching device as described in any one of claims 1-7.

9. The feed antenna platform according to claim 8, characterized in that: The coaxial cable comprises two sections, one of which is a rigid cable that extends from the back plate of the feed antenna platform, and the other is a flexible cable, with one end connected to the rigid cable and the other end detachably connected to the adapter via a matching connector.

10. The feed antenna platform according to claim 8, characterized in that: The bracket is installed at the center of the back plate of the feed antenna platform, and the mounting hole is located at the center of the substrate.

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