CN218727991U

CN218727991U - Monitoring radar

Info

Publication number: CN218727991U
Application number: CN202222602181.8U
Authority: CN
Inventors: 董磊; 冀磊; 李丽萍
Original assignee: Xi'an Tianhe Defense Technology Co ltd
Current assignee: Xi'an Tianhe Defense Technology Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-03-24
Anticipated expiration: 2032-09-29

Abstract

The application relates to the technical field of radar, and provides a monitoring radar which comprises a base; the case is rotatably arranged at the top of the base, and an accommodating space is formed in the case; the antenna assembly comprises a first antenna and a second antenna, wherein the first antenna is positioned at the top of the case and used for transmitting microwave signals to a sea surface target and receiving echo signals of the sea surface target, the second antenna is arranged on the outer side wall of the case and used for transmitting the microwave signals to an aerial target and receiving the echo signals of the aerial target, and the first antenna and the second antenna can rotate along with the case in a horizontal plane; and the control device is accommodated in the accommodating space and is connected to the first antenna and the second antenna through the radio frequency feeder. According to the monitoring radar, the first antenna and the second antenna are arranged on the case to realize the integrated monitoring of the single set of monitoring radar sea-air target, so that the application cost of the monitoring radar is reduced, the first antenna and the second antenna share one set of control device, the complexity of the system is reduced, and the cost is further reduced.

Description

Monitoring radar

Technical Field

The application relates to the technical field of radars, in particular to a surveillance radar.

Background

China stricken smuggling crime activities strictly across the country, but as continental coastlines are as long as 18000 kilometers, most of jurisdictions do not realize comprehensive monitoring in inshore and inshore areas, smuggling is still frequently prohibited and extremely rampant in inshore areas, and the domestic economic balance, social security and market order are destroyed.

At present, for smuggling criminal activities in coastal areas, effective control means are lacked, the popularization rate of radar monitoring means is low, the traditional passive means such as a frontier defense duty mode depending on manpower, law enforcement ship cruising, offshore monitoring video, satellite remote sensing and the like can only be continued to deal with, and the timeliness is poor and the adaptability is not strong. In addition, the existing monitoring means pay attention to sea surface ships, a monitoring blind area exists in a new means of carrying out smuggling by using an unmanned aerial vehicle offshore, and the cost is extremely high if a low-altitude radar is adopted to monitor the unmanned aerial vehicle and a sea defense radar is adopted to monitor the sea surface ships, so that the existing monitoring means is not beneficial to comprehensively monitoring the continental coastline in China.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a monitoring radar, which aims to solve the technical problems that the existing monitoring radar monitoring means is low in popularization rate and high in cost for monitoring low-altitude and sea-surface targets at the same time.

An embodiment of the present application provides a surveillance radar, including a base, characterized in that, the surveillance radar further includes:

the case is rotatably arranged at the top of the base, and an accommodating space is formed in the case;

the antenna assembly comprises a first antenna and a second antenna, wherein the first antenna is arranged at the top of the case and used for transmitting microwave signals to a sea surface target and receiving echo signals of the sea surface target, the second antenna is arranged on the outer side wall of the case and used for transmitting microwave signals to an aerial target and receiving echo signals of the aerial target, and both the first antenna and the second antenna can rotate along with the case in a horizontal plane;

and the control device is accommodated in the accommodating space and is connected with the first antenna and the second antenna through a radio frequency feeder.

In an embodiment, the control device includes a transceiver module, a signal processing module, a frequency synthesis module, and a frequency synthesis module, where the transceiver module includes an X-band transceiver module and a Ku-band transceiver module, the frequency synthesis module is configured to generate a marine intermediate frequency transmission signal and send the marine intermediate frequency transmission signal to the X-band transceiver module, and is configured to generate an empty intermediate frequency transmission signal and send the empty intermediate frequency transmission signal to the Ku-band transceiver module, the X-band transceiver module is connected to the first antenna through the corresponding radio frequency feeder, and the Ku-band transceiver module is connected to the second antenna through the corresponding radio frequency feeder.

In one embodiment, the first antenna is a waveguide slot antenna, and the pitch angle of the first antenna ranges from-10 degrees to 12 degrees;

the second antenna is a micro-printed antenna, and the pitch angle of the second antenna ranges from 6 degrees to 40 degrees.

In an embodiment, the monitoring radar further includes a flange plate disposed at the top of the chassis, the first antenna is fixedly connected to the flange plate, a through hole is formed in the center of the flange plate, and the radio frequency feed line passes through the through hole and is connected to the first antenna.

In an embodiment, the first antenna is in an elongated shape, and a center of the flange coincides with a center of the first antenna.

In one embodiment, the chassis comprises a mounting surface, a preset included angle is formed between the mounting surface and the vertical direction, and the second antenna is sheet-shaped and is attached to the mounting surface.

In an embodiment, the chassis includes a box body and a back plate connected to each other, the box body is provided with a first opening and a second opening opposite to each other, the back plate is disposed at the first opening and detachably connected to the box body, and the second antenna is disposed at the second opening;

at least one of the back plate and the box body is provided with heat dissipation fins.

In an embodiment, the machine case is further provided with an antenna housing which is arranged at the second opening and used for fixing the second antenna, the antenna housing comprises a frame and an extension edge which are connected in a bending mode, the extension edge is arranged on one side of the box body and can be attached to the mounting surface, a connecting hole for mounting a screw is formed in the extension edge, the antenna housing can be mounted on the box body through a screw, and the second antenna is clamped on the inner wall of the frame.

In an embodiment, a connection port is provided on the base, and the monitoring radar further includes a slip ring provided on the base, wherein the slip ring is used for communicating the control device and the connection port.

In an embodiment, the monitoring radar further includes a driving mechanism and a flange turntable, which are connected to each other, the driving mechanism is configured to drive the flange turntable to rotate in a horizontal plane, the driving mechanism is disposed in the base, the flange turntable is disposed at the top of the base, a through hole is formed in the center of the flange turntable, the slip ring is embedded in the through hole, and the chassis is disposed on one side of the flange turntable away from the base and is fixedly connected to the flange turntable.

According to the monitoring radar, the first antenna and the second antenna are arranged on the case to realize the integrated monitoring of the air and sea targets of the single set of monitoring radar, the task can be completed without the matching of the two sets of monitoring radars for the sea and the air, the application cost of the monitoring radar is effectively reduced, the timeliness and effectiveness of target monitoring are improved, and a foundation is provided for the wide application of the monitoring radar in the offshore and offshore target monitoring field. In addition, the first antenna and the second antenna share one set of control device, the complexity of the system is reduced, and the cost is further reduced, so that the technical problems that the existing monitoring radar monitoring means is low in popularization rate and high in cost for monitoring low-altitude and sea-surface targets at the same time are effectively solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a front view of a surveillance radar according to an embodiment of the present application;

FIG. 2 is a rear view of the surveillance radar of FIG. 1;

FIG. 3 is a schematic perspective view of the surveillance radar of FIG. 1;

FIG. 4 is a schematic perspective exploded view of another angle of the surveillance radar of FIG. 1;

fig. 5 is an exploded perspective view of the housing, power supply and control device of the surveillance radar shown in fig. 4.

The designations in the figures mean:

100. monitoring the radar;

10. a base; 11. a connecting port;

20. a chassis; 21. a mounting surface; 22. a box body; 221. a first opening; 222. a second opening; 23. a back plate; 24. an antenna cover; 241. a frame; 242. extending the long side;

31. a first antenna; 32. a second antenna;

41. a transceiver module; 411. an X frequency band transceiver module; 412. a Ku frequency band transceiver module; 42. a signal processing module; 43. a frequency synthesis module; 44. a frequency synthesis module;

50. a power supply module;

60. a flange plate; 61. a through hole;

70. a collector ring;

80. a flange carousel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present application. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

To explain the technical solutions of the present application, the following description is made with reference to specific drawings and examples.

The embodiment of the application provides a surveillance radar, and the task that can only be accomplished to sea, empty two sets of surveillance radars can be realized to the integration monitoring of low latitude, sea surface target to the accessible, effectively reduces surveillance radar application cost, improves the timeliness, the validity of target monitoring, provides the basis for the wide application of surveillance radar in coastal waters near bank target monitoring field.

Referring to fig. 1 and 2, in one embodiment of the present application, a surveillance radar 100 includes a base 10, a chassis 20, an antenna assembly, and a control device.

The case 20 is rotatably disposed on the top of the base 10, that is, 360 ° azimuth coverage in the horizontal plane is achieved by means of mechanical scanning, so as to ensure that the monitored range of the monitoring radar 100 is as large as possible, and an accommodating space is provided in the case 20.

The antenna assembly comprises a first antenna 31 and a second antenna 32, the first antenna 31 is positioned at the top of the case 20 and is used for transmitting microwave signals to a sea surface target and receiving echo signals of the sea surface target so as to monitor the sea surface target; the second antenna 32 is arranged on the outer side wall of the case 20 and used for transmitting microwave signals to an aerial target and receiving echo signals of the aerial target so as to monitor the aerial target, the first antenna 31 and the second antenna 32 can rotate along with the case 20 in the horizontal plane, and therefore the sea surface target and the aerial target can be monitored simultaneously through the same monitoring radar 100, the low-altitude monitoring radar 100 does not need to be adopted to monitor the unmanned aerial vehicle and the sea surface ship through the sea defense monitoring radar 100, and cost is reduced.

The control device is accommodated in the accommodating space and is connected to the first antenna 31 and the second antenna 32 through a radio frequency feeder (not shown), so that the complexity of system connection is reduced. It will be appreciated that the control means is connected to and controls the first antenna 31 and the second antenna 32 by respective radio frequency feeds, i.e. both signal transmission and signal reception by the first antenna 31 are independent of signal transmission and signal reception by the second antenna 32.

The radio frequency feeder line is a transmission line for transmitting radio frequency signals, mainly comprises a rubber and plastic outer skin, a shielding copper skin, an insulating filling layer, a communication part and a copper core, and is mature in preparation process and low in cost.

The monitoring radar 100 realizes the integrated monitoring of the sea and air targets of the single set of monitoring radar 100 by arranging the first antenna 31 and the second antenna 32 on the case 20, and does not need to match two sets of monitoring radars for the sea and the air to complete tasks, thereby effectively reducing the application cost of the monitoring radar 100, improving the timeliness and effectiveness of target monitoring, and providing a basis for the wide application of the monitoring radar 100 in the offshore and offshore near-shore target monitoring field. In addition, the first antenna 31 and the second antenna 32 share one set of control device, so that the complexity of the system is reduced, the cost is further reduced, and the technical problems that the existing monitoring radar monitoring means is low in popularization rate and high in cost for monitoring low-altitude and sea-surface targets at the same time are effectively solved.

It can be understood that the monitoring radar 100 proposed in the present application may further be externally connected with a display and control terminal to adjust relevant parameters of the monitoring radar 100 and visually display the monitoring result of the monitoring radar 100. Wherein, the display control terminal can include the display control module.

Referring to fig. 3 and 5, in an embodiment of the present application, the control device includes a transceiver module 41, a signal processing module 42, a frequency synthesis module 43, and a frequency synthesis module 44, and completes generation of a microwave signal and echo signal processing of a target. The transceiver module 41 comprises an X-band transceiver module 411 and a Ku-band transceiver module 412, the frequency synthesis module 44 is configured to generate a sea-facing intermediate frequency transmission signal and send the sea-facing intermediate frequency transmission signal to the X-band transceiver module 411, and is configured to generate an empty intermediate frequency transmission signal and send the empty intermediate frequency transmission signal to the Ku-band transceiver module 412, the X-band transceiver module 411 is connected to the first antenna 31 through a corresponding radio frequency feeder line, and upconverts the sea-facing intermediate frequency transmission signal into an X-band microwave signal, and receives a target echo and downconverts the target echo into an intermediate frequency echo signal; the Ku frequency band transceiver module 412 is connected to the second antenna 32 through a corresponding radio frequency feeder, and upconverts an empty intermediate frequency transmitting signal into a microwave signal of a Ku frequency band, and receives a target echo and downconverts the target echo into an intermediate frequency echo signal; the frequency synthesis module 43 is used for generating reference frequency signals required by other modules; the signal processing module 42 is configured to receive and process the two paths of intermediate frequency echo signals, and finally send the point track data of the target to the display control terminal for display.

Referring to fig. 4 and 5, the x-band transceiver module 411, the Ku-band transceiver module 412, the signal processing module 42, the frequency synthesis module 43, and the frequency synthesis module 44 are all modularly disposed and compactly installed in the chassis 20 to form a whole monitoring radar 100, thereby avoiding the decentralized arrangement of the components, and simultaneously shortening the connection distance between the components and reducing the usage of radio frequency feeder lines; in addition, each module can be quickly removed and replaced, thereby improving the reliability and maintainability of the surveillance radar 100 and facilitating the replacement of internal components.

The frequency range of the X frequency band is 8 GHz-12 GHz, the corresponding wavelength of the central frequency is 3cm, and the target detection precision is high; the frequency range of the Ku frequency band is 12 GHz-18 GHz, the corresponding wavelength of the central frequency is 2cm, and the caliber size of the second antenna 32 for receiving the Ku frequency band is small, so that the second antenna and the first antenna 31 can be conveniently integrated on the same case 20. In addition, a wider bandwidth and a higher resolution are more easily achieved in the frequency ranges in which the X band and the Ku band are located.

It is understood that the control device may also include other modules, such as a bluetooth communication module, etc., without limitation.

In addition, the monitoring radar 100 further includes a power module 50 disposed in the chassis 20, wherein the power module 50 is electrically connected to the control device, and provides corresponding DC power for the signal processing module 42, the frequency synthesizing module 44, the frequency synthesizing module 43, and the transceiver module 41, and can complete power conversion from DC48V to DC28V, and DC 12V.

In an embodiment, the first antenna 31 is a waveguide slot antenna, and the pitch angle of the first antenna 31 ranges from-10 ° to 12 °, that is, the first antenna 31 can realize pitch area coverage of-10 ° to 12 °, thereby ensuring identification and capture of an object on the sea surface. Specifically, a plane where the center of the first antenna 31 is located is taken as a first horizontal plane, and 0 ° means that the target is located on the first horizontal plane; 10 ° means that the target is located below the first horizontal plane and the line between the target and the first antenna 31 makes an angle of 10 ° with the first horizontal plane; 12 means that the object is located above the first horizontal plane and the line between the object and the first antenna 31 forms an angle of 12 with the first horizontal plane. It is understood that in other embodiments of the present application, the pitch angle of the first antenna 31 may also have any value from-10 ° to 12 °, which is not limited herein.

The second antenna 32 is a micro-printed antenna, and the pitch angle of the second antenna 32 ranges from 6 ° to 40 °, that is, the second antenna 32 can realize the pitch area coverage of 6 ° to 40 °. The pitch angle of the second antenna 32 is defined similarly to that of the first antenna 31, and is not described herein again.

Referring to fig. 4 and 5, in an embodiment of the present application, the monitoring radar 100 further includes a flange 60 disposed on the top of the chassis 20, the first antenna 31 is fixedly connected to the flange 60, that is, the first antenna 31 is fixed by the flange 60, a through hole 61 is formed in the center of the flange 60, and the radio frequency feed line passes through the through hole 61 and is connected to the first antenna 31. Thus, the first antenna 31 and the control device in the case 20 can be connected through the radio frequency feeder via the through hole 61 of the flange 60, i.e. the connection between the first antenna 31 and the control device is simple, and the process of the radio frequency feeder is mature, and the cost is low.

In the embodiment, referring to fig. 1 to 3, the first antenna 31 is a strip, the beam is narrow, the coverage area is wide, and the center of the flange 60 coincides with the center of the first antenna 31, so that when the first antenna 31 rotates along with the flange 60 and the chassis 20, the first antenna 31 symmetrically disposed is stressed stably, which is beneficial to the accuracy of the monitoring result.

Specifically, the first antenna 31 is designed by using an airfoil streamline, please refer to fig. 3, in the schematic perspective view of the surveillance radar 100 provided in the present application, the first antenna 31 includes a first section, a second section, and a third section, which are sequentially connected, the first section and the third section are both semi-cylinders, the second section is a prismoid, that is, the left side and the right side of the radial section of the first antenna 31 are both semi-arcs, the radius of the semi-arc on the left side is greater than that of the semi-arc on the right side, the lowest point of the semi-arc on the left side and the lowest point of the semi-arc on the right side are on the same straight line, and the highest point of the semi-arc on the left side and the highest point of the semi-arc on the right side are connected. Thus, the first antenna 31 can greatly reduce wind resistance during rotation operation.

Referring to fig. 5, in an embodiment of the present application, the chassis 20 includes a mounting surface 21, a predetermined included angle is formed between the mounting surface 21 and the vertical direction, and the second antenna 32 is shaped like a sheet and is attached to the mounting surface 21. Therefore, a preset included angle can be formed between the second antenna 32 and the vertical direction, so that the pitch angle range of the second antenna 32 is adjusted, the monitoring range of the monitoring radar 100 on the aerial target is expanded, and the influence of sea surface target interference echoes is reduced.

Further, referring to fig. 4 and fig. 5, in the embodiment, the chassis 20 includes a box body 22 and a back plate 23 connected to each other, the box body 22 is provided with a first opening 221 and a second opening 222 opposite to each other, the back plate 23 is disposed at the first opening 221 and detachably connected to the box body 22, so as to facilitate assembly of the chassis 20, and the module in the chassis 20 can be repaired by removing the back plate 23, and the second antenna 32 is disposed at the second opening 222.

Since each module in the chassis 20 generates a large amount of heat when operating for a long time, at least one of the back plate 23 and the box 22 is provided with heat dissipation fins, so that the chassis 20 has a good heat dissipation effect, and the heat dissipation efficiency of the surveillance radar 100 is improved.

Specifically, chassis 20 is still including locating second opening 222 department and being used for the fixed antenna house 24 of second antenna 32, and antenna house 24 is including the frame 241 and the extension limit 242 of buckling the connection, and extension limit 242 is located frame 241 and is just can be laminated on installation face 21 towards one side of box 22, offers the connecting hole that is used for the mounting screw on the extension limit 242, and antenna house 24 accessible screw mounting is on box 22, and second antenna 32 joint is in the inner wall of frame 241. It is understood that the radome 24 can protect the second antenna 32 from external impact and damage caused by saline-alkali environment to some extent.

Wherein, the edge of second antenna 32 can be equipped with waterproof rubber ring, can realize on the one hand that second antenna 32 is for the stability of frame 241 position, and on the other hand still can reduce the possibility of intaking in quick-witted case 20, improves surveillance radar 100's waterproof leakproofness.

Referring to fig. 3 and 4, in an embodiment of the present application, a connection port 11 is disposed on the base 10, the connection port 11 includes a network interface, a north seeker interface and a debugging interface, the network interface is used for connecting an optical fiber, the north seeker interface is used for connecting a gyro north seeker, and the debugging interface can be used for troubleshooting and solving each module in the chassis 20; the monitoring radar 100 further comprises a bus ring 70 arranged on the base 10, wherein the bus ring 70 is used for communicating the control device with the connecting port 11, and signal transmission between the case 20 and the outside is realized in a rotating or static process.

It is understood that external interfaces such as power supply, gigabit network, optical fiber, north finding, etc. of the monitoring radar 100 host are communicated to the connecting port 11 on the lower side of the base 10 through the slip ring 70 to connect corresponding devices.

Specifically, referring to fig. 4, in the present embodiment, the monitoring radar 100 further includes a driving mechanism (not shown) and a flange turntable 80, which are connected to each other, the driving mechanism is used for driving the flange turntable 80 to rotate in a horizontal plane, the driving mechanism is disposed in the base 10, the flange turntable 80 is disposed at the top of the base 10, a through hole is formed in the center of the flange turntable 80, the bus ring 70 is embedded in the through hole, and the chassis 20 is disposed on one side of the flange turntable 80 away from the base 10 and is fixedly connected to the flange turntable 80.

The monitoring radar 100 further includes a transmission mechanism and an angle encoder (not shown) disposed in the base 10, the transmission mechanism provides a rotational driving force, the transmission mechanism is used for realizing connection between the transmission mechanism and the flange rotary table 80 and driving the flange rotary table 80 to rotate, and the angle encoder and the bus ring 70 rotate synchronously to realize measurement of the antenna azimuth rotation angle.

In one embodiment of the present application, the operational relationship and flow of the components of the surveillance radar 100 are:

the first step is as follows: after the system is powered on, the power module 50 converts the input 48V direct current into direct current required by each module of the system, and the frequency synthesis module 43 generates local oscillation signals and synchronous signals used by the whole monitoring radar 100 and sends the local oscillation signals and the synchronous signals to other modules.

The second step: the signal processing module 42 collects BIT information of other modules and reports the BIT information to the display control terminal, receives a command from the display control module, controls the working mode and the time sequence of the monitoring radar 100 system, and the frequency synthesis module 44 generates two paths of intermediate frequency transmitting signals, namely, sea intermediate frequency transmitting signals and air intermediate frequency transmitting signals.

The third step: the two intermediate frequency transmission signals generated by the frequency synthesis module 44 are amplified and up-converted twice by the transceiver module 41 to form two microwave signals of an X frequency band and a Ku frequency band, and the X frequency band microwave signals are transmitted to the first antenna 31 and the Ku frequency band microwave signals are transmitted to the second antenna 32 by the radio frequency feeder.

The fourth step: the first antenna 31 and the second antenna 32 respectively receive two paths of echo signals of the monitoring radar 100, and the echo signals are amplified and down-converted twice by the transceiver module 41 through the radio frequency feeder line and converted into two paths of intermediate frequency echo signals.

The fifth step: the two paths of intermediate frequency echo signals are processed by the signal processing module 42 through intermediate frequency sampling, DDC, pulse compression, coherent accumulation, constant false alarm detection, sea clutter anti-interference processing, point track flight path processing, target classification and the like, and finally target information is sent to the display control module for display.

The monitoring radar 100 realizes the integrated monitoring of the sea and air targets of the single set of monitoring radar 100 by arranging the first antenna 31 and the second antenna 32 on the case 20, and does not need to match two sets of monitoring radars for the sea and the air to complete tasks, thereby effectively reducing the application cost of the monitoring radar 100, improving the timeliness and effectiveness of target monitoring, and providing a basis for the wide application of the monitoring radar 100 in the offshore and offshore near-shore target monitoring field. Secondly, the first antenna 31 and the second antenna 32 share one set of control device, so that the complexity of the system is reduced, the cost is further reduced, and the technical problems that the existing monitoring radar monitoring means is low in popularization rate and high in cost for monitoring low-altitude and sea-surface targets at the same time are effectively solved. In addition, each part modularization setting of surveillance radar 100 to concentrate compactly and install in quick-witted case 20, form a surveillance radar 100 complete machine, avoided the decentralized of each part to arrange, shortened the connecting distance between each part and reduced the radio frequency feeder quantity simultaneously, each module all can realize quick dismantlement and change, thereby improved this surveillance radar 100's reliability, use maintainability, and made things convenient for the change of internal component.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A surveillance radar comprising a base, characterized in that it further comprises:

the chassis is rotatably arranged at the top of the base, and an accommodating space is formed in the chassis;

the antenna assembly comprises a first antenna and a second antenna, the first antenna is positioned at the top of the case and used for transmitting microwave signals to a sea surface target and receiving echo signals of the sea surface target, the second antenna is arranged on the outer side wall of the case and used for transmitting microwave signals to an air target and receiving echo signals of the air target, and the first antenna and the second antenna can rotate along with the case in a horizontal plane;

2. The surveillance radar according to claim 1, wherein the control device comprises a transceiver module, a signal processing module, a frequency synthesis module, and a frequency synthesis module, wherein the transceiver module comprises an X-band transceiver module and a Ku-band transceiver module, the frequency synthesis module is configured to generate a sea-facing if transmission signal and transmit the sea-facing if transmission signal to the X-band transceiver module, and generate an empty if transmission signal and transmit the empty if transmission signal to the Ku-band transceiver module, the X-band transceiver module is connected to the first antenna through the corresponding rf feeder, and the Ku-band transceiver module is connected to the second antenna through the corresponding rf feeder.

3. The surveillance radar of claim 2 wherein the first antenna is a waveguide slot antenna and the first antenna has a pitch angle in the range-10 ° to 12 °;

4. The surveillance radar of claim 1, further comprising a flange disposed on a top of the housing, wherein the first antenna is fixedly connected to the flange, a through hole is formed in a center of the flange, and the rf feed line passes through the through hole and is connected to the first antenna.

5. The surveillance radar of claim 4 wherein the first antenna is elongated and the center of the flange coincides with the center of the first antenna.

6. The surveillance radar as recited in claim 1, wherein the housing includes a mounting surface, the mounting surface has a predetermined angle with respect to a vertical direction, and the second antenna is shaped like a plate and is attached to the mounting surface.

7. The surveillance radar as recited in claim 6, wherein the chassis comprises a housing and a back plate connected to each other, the housing having a first opening and a second opening opposite to each other, the back plate being disposed at the first opening and detachably connected to the housing, the second antenna being disposed at the second opening;

8. The surveillance radar as recited in claim 7, wherein the case further includes a radome disposed at the second opening and used for fixing the second antenna, the radome includes a frame and an extension edge, the extension edge is disposed on a side of the frame facing the case and can be attached to the mounting surface, a connection hole is disposed on the extension edge for mounting a screw, the radome can be mounted on the case by a screw, and the second antenna is fastened to an inner wall of the frame.

9. The surveillance radar according to any one of claims 1 to 8, wherein a connection port is provided on the base, and the surveillance radar further comprises a slip ring provided on the base for communicating the control device with the connection port.

10. The surveillance radar as recited in claim 9, further comprising a driving mechanism and a flange turntable connected to each other, wherein the driving mechanism is configured to drive the flange turntable to rotate in a horizontal plane, the driving mechanism is disposed in the base, the flange turntable is disposed on a top of the base, a through hole is formed in a center of the flange turntable, the slip ring is embedded in the through hole, and the chassis is disposed on a side of the flange turntable away from the base and is fixedly connected to the flange turntable.