Mobile satellite communication antenna

Abstract

Embodiments of the present invention provide a mobile satellite communication antenna, which relates to the technical field of antennas. The mobile satellite communication antenna includes an antenna body, an arc-shaped cold plate, a top plate and a cold plate cover. The antenna body is disposed on the upper surface of the arc-shaped cold plate, the top plate is covered on the antenna body, and the cold plate cover is disposed on the lower side of the arc-shaped cold plate. The lower surface of the arc-shaped cold plate is an arc-shaped curved surface structure and protrudes downward. A heat dissipation channel is formed between the upper surface of the cold plate cover and the lower surface of the arc-shaped cold plate. Two ends of the heat dissipation channel are respectively communicated with a first communication port and a second communication port at two ends of the arc-shaped cold plate, and a guide through hole communicated with the heat dissipation channel is formed in the cold plate cover. Compared with the prior art, in the present invention, the lower surface of the arc-shaped cold plate is set as an arc-shaped curved surface structure, and a guide through hole is arranged at the bottom of the heat dissipation through hole, so that cold air flows in from the guide through hole, and hot air flows out from the first communication port and the second communication port, and the heat dissipation efficiency is high and the heat dissipation effect is good.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a communication-in-motion antenna. Background Art

[0002] Traditional moving phased array antennas usually use self-contained fans for active forced convection cooling. Generally, two or three centrifugal or axial fans can be carried under or on the side of the moving phased array antenna. The advantage is that no matter whether the car is moving or stationary, the moving phased array antenna can always ensure sufficient heat exchange air volume for heat dissipation, so as not to cause the electronic devices in the moving phased array antenna to overheat or even burn out. However, its disadvantages are also quite obvious. First, the fan on the moving phased array antenna is a life-span component, which may be damaged or its performance degraded in a complex environment; second, the fan produces a lot of noise, which will cause some discomfort to the user; third, the fan will increase additional power consumption and increase fuel consumption; finally, when the car is running at high speed, if it encounters dusty roads or heavy rain, dust or raindrops may enter the cooling air duct with the air, causing dust and water accumulation, reducing the three-proof performance of the cooling cold plate, and even causing damage to the fan.

[0003] In order to solve the problems caused by the above-mentioned fan heat exchange, the measures usually taken in the prior art are natural heat dissipation and passive forced heat dissipation. Natural heat dissipation means that the moving phased array antenna does not use any active rotating equipment to drive air flow and heat exchange, but only relies on the heated air to float and flow for heat dissipation. This heat dissipation method is limited by its flow physical mechanism, and the convective heat transfer is very small, usually only 3~10W / m2℃ (the convective heat transfer coefficient of forced air cooling can usually be an order of magnitude higher), and the heat at the bottom of the low-profile moving phased array antenna is more concentrated and has more heat sources. Even if the fins are designed under the moving phased array antenna, the horizontal bottom configuration and the narrow air flow space still lead to a very low natural convection heat transfer coefficient, so its heat dissipation efficiency is even lower, and the transmission volume of the moving phased array antenna is generally relatively large, and the design of too many heat dissipation fins affects the product appearance, weight and user experience. Therefore, the traditional method of adding heat dissipation fins cannot meet the current heat dissipation requirements and application environment of the moving phased array antenna.

[0004] Therefore, passive forced air cooling is preferred in the prior art. Passive forced air cooling refers to designing straight cooling fins in the heat concentration area at the bottom of the frame of the moving phased array antenna to form an air flow channel, which is in the same direction as the car's travel. When the car is moving, air is passively poured into the cooling fins for forced convection heat exchange. This heat dissipation method has a good heat dissipation effect when the car is moving, but when the car stops, the straight fin cold plate only has small openings in the front and rear of the car's travel direction. Natural convection air cannot form a flow inside the cold plate, and the heat dissipation efficiency is greatly reduced. It cannot meet the heat dissipation needs of the moving phased array antenna of the car when the car is stopped for a long time. Summary of the Invention

[0005] The objectives of the present invention include, for example, providing a mobile communication antenna with good heat dissipation effect and capable of meeting the heat dissipation requirements of a mobile communication phased array antenna on a vehicle when the vehicle stops for a long time.

[0006] Embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a mobile communication antenna, including an antenna body, an arc-shaped cold plate, a top plate and a cold plate cover. The antenna body is disposed on the upper surface of the arc-shaped cold plate. The top plate covers the antenna body. The cold plate cover is disposed on the lower side of the arc-shaped cold plate. The lower surface of the arc-shaped cold plate is an arc-shaped curved surface structure and protrudes downward. A heat dissipation channel is formed between the upper surface of the cold plate cover and the lower surface of the arc-shaped cold plate. A first flow port and a second flow port are respectively disposed at two ends of the arc-shaped cold plate. Two ends of the heat dissipation channel are respectively communicated with the first flow port and the second flow port, and a guide flow hole communicated with the heat dissipation channel is formed in the cold plate cover.

[0008] In an optional embodiment, the upper surface of the cold plate cover is also an arc-shaped curved surface structure, so that the heat dissipation channel is arc-shaped.

[0009] In an optional embodiment, the curvature of the upper surface of the cold plate cover is less than or equal to the curvature of the lower surface of the arc-shaped cold plate, so that the width of the middle part of the heat dissipation channel is less than or equal to the width of the two ends of the heat dissipation channel.

[0010] In an optional embodiment, a drain hole is formed in the middle of the cold plate cover. The guide flow hole is formed on at least one side of the drain hole, and the distance between the drain hole and the top plate is greater than the distance between the guide flow hole and the top plate.

[0011] In an optional embodiment, a plurality of heat dissipation fins are further disposed on the lower surface of the arc-shaped cold plate. The cold plate cover is mounted outside the plurality of heat dissipation fins. The plurality of heat dissipation fins divide the heat dissipation channel into a plurality of flow channels. Two ends of each flow channel are respectively communicated with the first flow port and the second flow port.

[0012] In an optional embodiment, the width of each flow channel gradually increases in the direction extending from the middle to both ends.

[0013] In an optional embodiment, a transverse flow disturbing port is formed on each heat dissipation fin, and the transverse flow disturbing port is used for communicating two adjacent flow channels.

[0014] In an alternative embodiment, there are a plurality of the lateral spoiler openings, and the distance between two adjacent lateral spoiler openings gradually decreases in the direction extending from the middle of the heat dissipation fins to both ends.

[0015] In an alternative embodiment, the opening area of the lateral spoiler openings gradually increases in the direction extending from the middle of the heat dissipation fins to both ends.

[0016] In an alternative embodiment, a guide groove opening is formed in the middle of each heat dissipation fin, and a plurality of the guide groove openings together form a diversion slot, and the diversion slot is located in the middle of the lower surface of the arc-shaped cold plate.

[0017] The beneficial effects of the embodiments of the present invention include, for example:

[0018] The mobile communication antenna provided by the embodiment of the present invention has the lower surface of the arc-shaped cold plate arranged in an arc shape and protruding downward, so as to play a guiding role, and a heat dissipation channel is formed between the upper surface of the cold plate cover and the lower surface of the arc-shaped cold plate. A first flow port and a second flow port are respectively arranged at both ends of the arc-shaped cold plate, and both ends of the heat dissipation channel are respectively communicated with the first flow port and the second flow port, and a guide through hole communicated with the heat dissipation channel is formed in the cold plate cover. During actual heat dissipation, when the mobile communication antenna is in a stationary state, due to no relative movement and the air being in a stationary state, the antenna body generates heat in the working mode and conducts it to the arc-shaped cold plate. The arc-shaped cold plate heats up, generating a temperature difference with the air in the heat dissipation channel. The air in the heat dissipation channel expands due to heat, and its density decreases. The hot air moves upward, forming natural convection. And the hot air flows along the lower surface of the arc-shaped cold plate towards both sides. During the flowing process, there is a tendency to continue rising, and the convective activity is stronger under the action of buoyancy. That is, under the action of buoyancy, the hot air can quickly flow towards both sides along the lower surface of the arc-shaped cold plate and flow out from the first flow port and the second flow port, improving the heat dissipation efficiency. At the same time, the external cold air enters the heat dissipation channel through the guide through hole at the bottom of the heat dissipation channel, thereby supplementing the cold air inside the heat dissipation channel and greatly improving the heat dissipation effect. Compared with the prior art, the present invention sets the lower surface of the arc-shaped cold plate into an arc-shaped curved surface structure, and a guide through hole is arranged at the bottom of the heat dissipation through hole, so that the cold air flows in from the guide through hole and the hot air flows out from the first flow port and the second flow port, with high heat dissipation efficiency and good heat dissipation effect. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic diagram of the antenna with communication while moving provided by the embodiment of the present invention from the first perspective;

[0021] Figure 2 Schematic diagram of the antenna with communication while moving provided by the embodiment of the present invention from the second perspective;

[0022] Figure 3 Schematic diagram of the antenna with communication while moving provided by the embodiment of the present invention from the third perspective;

[0023] Figure 4 Schematic diagram of the antenna with communication while moving provided by the embodiment of the present invention from the fourth perspective;

[0024] Figure 5 Exploded structure schematic diagram of the antenna with communication while moving provided by the embodiment of the present invention;

[0025] Figure 6 Partial structure schematic diagram of the antenna with communication while moving provided by the embodiment of the present invention;

[0026] Figure 7 is Figure 6 Partial enlarged schematic diagram of VII in

[0027] Icon: 100 - Antenna with communication while moving; 110 - Arc-shaped cold plate; 120 - Antenna body; 111 - Heat dissipation fins; 113 - First fin group; 115 - Second fin group; 117 - Transverse flow disturbing port; 119 - Guide groove opening; 130 - Top plate; 150 - Cold plate cover; 151 - Guide through hole; 153 - Drain hole; 170 - Heat dissipation channel; 171 - First flow port; 173 - Second flow port; 200 - Vehicle roof. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0032] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0033] As disclosed in the background art, for the existing mobile communication antenna 100 in motion, when adopting the passive forced air-cooling heat dissipation means, a flat fin cold plate is usually used for heat exchange. When the vehicle is moving, air is passively introduced into the flat fin cold plate for forced convection heat exchange, which can ensure good heat dissipation effect. However, when the vehicle stops, the flat fin cold plate only has openings at the front and rear in the vehicle driving direction, and the inside of the cold plate is a flat structure, making it difficult to form air flow, resulting in a significant reduction in heat dissipation efficiency and being unable to meet the heat dissipation requirements of the mobile communication phased array antenna of the vehicle when the vehicle stops for a long time. In addition, when the existing flat fin cold plate is in motion, external dust or raindrops will enter the inside of the flat fin cold plate along with the air, causing dust accumulation and water accumulation, affecting the three-proof performance of the heat dissipation cold plate, resulting in a decrease in the heat dissipation efficiency of the heat dissipation cold plate, and even electrochemical corrosion caused by the accumulation of raindrops inside.

[0034] To solve the above problems, the present invention provides a mobile communication antenna 100. It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0035] Please refer to Figures 1 to 7 , this embodiment provides a mobile communication antenna 100, which can ensure that the heat dissipation effect in the stationary state meets the requirements, and at the same time can solve the problems of water accumulation and dust accumulation, ensure the heat dissipation efficiency, and avoid electrochemical corrosion caused by the accumulation of raindrops inside.

[0036] The mobile communication antenna 100 provided in this embodiment includes an antenna body 120, an arc-shaped cold plate 110, a top plate 130, and a cold plate cover 150. The antenna body 120 is disposed on the upper surface of the arc-shaped cold plate 110. The top plate 130 covers the antenna body 120. The cold plate cover 150 is disposed on the lower side of the arc-shaped cold plate 110. The lower surface of the arc-shaped cold plate 110 is an arc-shaped curved surface structure and protrudes downward. A heat dissipation channel 170 is formed between the upper surface of the cold plate cover 150 and the lower surface of the arc-shaped cold plate 110. A first flow port 171 and a second flow port 173 are respectively disposed at two ends of the arc-shaped cold plate 110. Two ends of the heat dissipation channel 170 are respectively communicated with the first flow port 171 and the second flow port 173. And a guiding through hole 151 communicated with the heat dissipation channel 170 is formed in the cold plate cover 150.

[0037] In this embodiment, the arc-shaped cold plate 110 is made of aluminum alloy and has good heat transfer performance. The antenna body 120 is attached to the upper surface of the arc-shaped cold plate 110. At the same time, other electronic components are also attached to the upper surface of the arc-shaped cold plate 110. The antenna body 120 and the electronic components together serve as heat sources and generate a large amount of heat under the working state.

[0038] It should be noted that in this embodiment, the mobile communication antenna 100 is disposed on the roof 200 of an automobile and fixed by a mounting bracket. The effective load of the antenna body 120 is located above the arc-shaped cold plate 110, and the first flow port 171 and the second flow port 173 are disposed along the moving direction of the automobile. When the automobile is moving, air enters the heat dissipation channel 170 from the first flow port 171 and then flows out from the second flow port 173, realizing forced convection heat transfer, quickly taking away the heat transferred by the arc-shaped cold plate 110, completing the heat transfer process, and ensuring the heat dissipation effect. When the automobile is stationary, due to no relative movement, the air is also in a stationary state. At this time, the antenna body 120 generates heat in the working mode and conducts the heat to the arc-shaped cold plate 110. The arc-shaped cold plate 110 heats up, generating a temperature difference with the air in the heat dissipation channel 170. And the air in the heat dissipation channel 170 expands when heated, with a reduced density, and the hot air moves upward, forming natural convection. And the hot air flows along the lower surface of the arc-shaped cold plate 110 towards both sides. During the flowing process, there is a tendency to continue rising, and the convection activity is stronger under the action of buoyancy. That is, under the action of buoyancy, the hot air can quickly flow along the lower surface of the arc-shaped cold plate 110 towards both sides and flow out from the first flow port 171 and the second flow port 173, improving the heat dissipation efficiency. At the same time, the external cold air enters the heat dissipation channel 170 from the guiding through hole 151 at the bottom of the heat dissipation channel 170, thereby supplementing the cold air inside the heat dissipation channel 170 and greatly improving the heat dissipation effect.

[0039] In this embodiment, the moving direction of the vehicle is defined as the first horizontal direction, and the horizontal direction perpendicular to the vehicle movement is defined as the second horizontal direction. The first flow port 171 and the second flow port 173 are respectively arranged at both ends of the arc-shaped cold plate 110 along the first horizontal direction. At the same time, the lower surface of the arc-shaped cold plate 110 has an arc-shaped curved surface structure, which means that the vertical section of the arc-shaped cold plate 110 along the first direction is bow-shaped, and the lower edge of the cross-section of the arc-shaped cold plate 110 is arc-shaped.

[0040] In this embodiment, the upper surface of the cold plate cover 150 also has an arc-shaped curved surface structure, so that the heat dissipation channel 170 is arc-shaped. Specifically, the vertical section of the cold plate cover 150 along the first direction is also arc-shaped and bulges downward, so that both the upper surface and the lower surface of the cold plate cover 150 have an arc-shaped curved surface structure, and the heat dissipation channel 170 is arc-shaped. Here, the heat dissipation channel 170 being arc-shaped means that the shape of the vertical section of the heat dissipation channel 170 along the first direction is arc-shaped, and both ends of the heat dissipation channel 170 extend to the first flow port 171 and the second flow port 173 respectively.

[0041] In this embodiment, both the arc-shaped cold plate 110 and the cold plate cover 150 are symmetric structures, and their symmetry planes overlap. The symmetry plane is the vertical plane along the second direction, and the symmetry plane is located in the middle of the arc-shaped cold plate 110 and the cold plate cover 150. The middle in this embodiment refers to the central position of the entity or surface along the first direction.

[0042] In this embodiment, the curvature of the upper surface of the cold plate cover 150 is less than or equal to the curvature of the lower surface of the arc-shaped cold plate 110, so that the width of the middle part of the heat dissipation channel 170 is less than or equal to the width of both ends of the heat dissipation channel 170. Specifically, the curvature of the cold plate cover 150 is smaller, so that the width of the heat dissipation channel 170 gradually increases or remains unchanged from the middle to both ends. Preferably, the curvature of the upper surface of the cold plate cover 150 is less than the curvature of the lower surface of the arc-shaped cold plate 110, so that the heat dissipation channel 170 presents a structure of "narrow in the middle and wide at both ends", which is more conducive to air flow in the static state and also more conducive to forced air convection in the moving state.

[0043] It should be noted that in this embodiment, the greater the curvature of the cold plate cover 150, the more the cold plate cover 150 bulges downward, and the greater the impact on the appearance. And the greater the curvature of the lower surface of the arc-shaped cold plate 110, the stronger the convection in the static state. Therefore, in practical applications, the curvatures of the cold plate cover 150 and the arc-shaped cold plate 110 can be comprehensively designed according to the product heat load and the air flow heat transfer characteristics, in order to obtain the best heat dissipation effect.

[0044] In this embodiment, a drain hole 153 is formed in the middle of the cold plate cover 150, and the guide through holes 151 are formed on at least one side of the drain hole 153. The distance between the drain hole 153 and the top plate 130 is greater than the distance between the guide through holes 151 and the top plate 130. Specifically, there are multiple guide through holes 151, and the multiple guide through holes 151 are symmetrically distributed on both sides of the drain hole 153. The guide through holes 151 are used to introduce external cold air into the heat dissipation channel 170 in a static state. The drain hole 153 is arranged in the middle of the cold plate cover 150 and is located at the lowest position of the cold plate cover 150, so that water droplets, dust, etc. existing in the heat dissipation channel 170 will fall to the drain hole 153 under the action of gravity and be discharged outwards from the drain hole 153.

[0045] In this embodiment, both the guide through holes 151 and the drain hole 153 are strip-shaped. The extending direction of the drain hole 153 is parallel to the second direction and is located in the middle of the cold plate cover 150. Preferably, there are 6 guide through holes 151, and the 6 guide through holes 151 are symmetrically distributed on both sides of the drain hole 153. Three guide through holes 151 are arranged on each side of the drain hole 153. The multiple guide through holes 151 are parallel to each other and parallel to the drain hole 153, thereby forming a diversion channel and a drain channel at the bottom of the cold plate cover 150.

[0046] It should be noted that the lower surface of the cold plate cover 150 in this embodiment is also an arc-shaped curved surface structure, and the cold plate cover 150 is arranged above the vehicle roof 200. Generally, the surface of the vehicle roof 200 is an arc-shaped structure. The lower surface of the cold plate cover 150 and the arc-shaped vehicle roof 200 form a throat area with a wide middle and narrow ends. In a moving state, the air flow velocity in the throat area at the lower part of the cold plate cover 150 increases, resulting in a decrease in its static pressure, which can generate an additional suction effect on the drain hole 153 and further enhance the liquid drainage and dust removal effect of the drain hole 153.

[0047] A plurality of heat dissipation fins 111 are further arranged on the lower surface of the arc-shaped cold plate 110. The cold plate cover 150 is mounted outside the plurality of heat dissipation fins 111. The plurality of heat dissipation fins 111 divide the heat dissipation channel 170 into a plurality of flow channels, and both ends of each flow channel are respectively communicated with the first communication port 171 and the second communication port 173. Specifically, the lower parts of the plurality of heat dissipation fins 111 are abutted against the upper surface of the cold plate cover 150, and the plurality of flow channels are all arranged along the first direction. In a moving state, the flow channel direction mostly coincides with the moving direction, realizing forced air convection.

[0048] It should be noted that the structural dimensions of the heat dissipation fins 111 are adapted to the heat dissipation channels 170, so that a plurality of heat dissipation fins 111 are respectively in contact with the upper surface of the cold plate cover 150 and the lower surface of the arc-shaped cold plate 110 to form flow channels. Moreover, the heat dissipation fins 111 are integrally arranged on the lower surface of the arc-shaped cold plate 110, and the cold plate cover 150 is pressed on the plurality of heat dissipation fins 111.

[0049] In this embodiment, the width of each flow channel gradually increases in the direction extending from the middle to both ends. Specifically, each heat dissipation fin 111 has a hyperbolic configuration. The connecting line between the heat dissipation fin 111 and the lower surface of the arc-shaped cold plate 110 is arc-shaped. At the same time, the heat dissipation fin 111 is arc-shaped in the horizontal cross-section parallel to the horizontal direction. And each heat dissipation fin 111 has a symmetric structure, and the symmetry plane overlaps with the symmetry plane of the arc-shaped cold plate 110. The centers of a plurality of heat dissipation fins 111 in the horizontal direction are distributed along the first direction, and the curvature of a plurality of heat dissipation fins 111 in the horizontal direction increases or decreases, so that the width of each flow channel gradually increases from the middle to both ends, that is, each flow channel has the characteristics of being larger at both ends and smaller in the middle. This structure can ensure that when the air flows after being heated, the flow channel can better adapt to the physical law of gas thermal expansion, thereby reducing the flow resistance.

[0050] It should be noted that the plurality of heat dissipation fins 111 are divided into a plurality of first fin units and a plurality of second fin units. The plurality of first fin units form a first fin group 113, and the plurality of second fin units form a second fin group 115. The first fin group 113 and the second fin group 115 are symmetrically arranged. The symmetry plane is parallel to the first direction and perpendicular to the second direction, and the symmetry plane is located at the central position of the arc-shaped cold plate 110 along the second direction. Moreover, the curvature of the plurality of first fin units gradually increases from the symmetry plane towards the direction away from the second fin group 115, and the curvature of the plurality of second fin units gradually increases from the symmetry plane towards the direction away from the first fin group 113.

[0051] In this embodiment, a transverse flow disturbance port 117 is formed on each heat dissipation fin 111. The transverse flow disturbance port 117 is used to connect two adjacent flow channels. Specifically, the transverse flow disturbance port 117 is formed on the edge of the heat dissipation fin 111 close to the cold plate cover 150 and extends towards the arc-shaped cold plate 110, so that the air flow in the flow channel enters the adjacent flow channel closer to the central position through the transverse flow disturbance port 117 to generate air flow disturbance and enhance the heat exchange effect.

[0052] In this embodiment, there are multiple transverse spoiler openings 117, and the distance between two adjacent transverse spoiler openings 117 gradually decreases in the direction extending from the middle of the heat dissipation fins 111 to both ends. Specifically, on the same heat dissipation fin 111, the setting density of the transverse spoiler openings 117 gradually increases from the middle to both ends, so that the density in the middle is smaller and the density at both ends is larger. Denser transverse spoiler openings 117 are provided at the positions where the air flow velocity is larger at both ends to enhance the spoiler effect.

[0053] In this embodiment, the opening area of the transverse spoiler openings 117 gradually increases in the direction extending from the middle of the heat dissipation fins 111 to both ends. Specifically, the height of the transverse spoiler openings 117 relative to the upper side surface of the cold plate cover 150 gradually increases in the direction extending from the middle of the heat dissipation fins 111 to both ends, so that the opening areas of the transverse spoiler openings 117 at both ends are larger to enhance the spoiler effect at the positions where the air flow velocity is larger at both ends.

[0054] In this embodiment, a guide groove opening 119 is provided in the middle of each heat dissipation fin 111, and a plurality of guide groove openings 119 together form a diversion slot, and the diversion slot is located in the middle of the lower side surface of the arc-shaped cold plate 110. Specifically, the diversion slot corresponds to the liquid discharge hole 153 on the cold plate cover 150, so as to form a liquid discharge chamber above the liquid discharge hole 153 to enhance the liquid discharge and dust removal effect. In addition, a throat region is formed at the central position of the arc-shaped cold plate 110, which is the main channel for discharging liquid droplets or sand and dust.

[0055] Next, the functional principle of the mobile communication antenna 100 provided in this embodiment will be introduced, and it will be described in detail mainly from the heat dissipation enhancement method in the stationary state, the heat dissipation method in the moving state, and the liquid discharge and dust removal method.

[0056] For the mobile communication antenna 100 provided in the embodiment of the present invention, the heat dissipation enhancement in the stationary state of the vehicle is mainly aimed at enhancing natural convection heat transfer. Its theoretical basis is that, on the one hand, the intensity of natural convection heat transfer is proportional to the component of gravity along the flow direction; on the other hand, as the cooling air flows along the heat transfer wall surface, the thermal boundary layer continuously increases until the flow regime changes from laminar flow to turbulent flow after a sufficient long distance, and generally the scale of electronic devices cannot reach the turbulent transition length. Therefore, the heat dissipation of general devices only considers the enhancement of natural convection laminar flow heat transfer. During the continuous increase of the thermal boundary layer, the thermal resistance that inhibits the intensity of natural convection heat transfer increases accordingly; therefore, the structure of the present invention is mainly optimized and improved for the above two factors to improve the natural convection heat transfer ability of the radiator.

[0057] For the stationary state, the mobile communication antenna 100 provided in this embodiment mainly aims to enhance natural convection heat transfer to ensure the heat dissipation effect. In the mobile communication antenna 100 provided in this embodiment, when the vehicle is in a stationary state, the mobile communication antenna 100 is in a stationary state. Due to no relative movement, the air is also in a stationary state in the initial state. After the heat sources such as the antenna body 120 on the upper side surface of the arc-shaped cold plate 110 are in a working state, a large amount of heat is immediately generated and transferred to the arc-shaped cold plate 110. At this time, the arc-shaped cold plate 110 is heated and its temperature rises, and the air in the flow channel is heated. The air expands due to heat, its density decreases, and a buoyancy force is generated under the action of gravity and air pressure, driving the hot air to rise and forming natural convection. The natural convection generated by the bottom of the traditional flat cold plate being heated completely relies on the cold air at the bottom center to make up the position. The hot air is squeezed and flows out of the cold plate area to the two sides and rises. This kind of natural convection heat transfer of the flat cold plate is often not strong enough to meet the heat dissipation requirements of the mobile communication phased array antenna with a relatively high power. Different from the traditional flat cold plate, in this structure, since the lower side surface of the arc-shaped cold plate 110 is an arc-shaped curved surface structure, the air has a rising height during the process of flowing along the arc-shaped cold plate 110 to the two sides, thus generating an additional gravity component gcosα, where α is the angle between the tangent of the arc and gravity. The smaller this angle is, the greater the gravity component is, the greater the convective buoyancy force is, and the stronger the convection is. As a result, the natural convection heat transfer coefficient is increased and the heat dissipation efficiency is improved. At the same time, the external cold air enters the heat dissipation channel 170 through the air guiding through holes 151 at the bottom of the heat dissipation channel 170, thus supplementing the cold air inside the heat dissipation channel 170 and greatly improving the heat dissipation effect.

[0058] Secondly, the heat dissipation fins 111 are configured as a hyperbolic shape, such that the width of the flow channel gradually increases from the middle to both ends, and at the same time, the height of the flow channel (i.e., the distance between the arc-shaped cold plate 110 and the cold plate cover 150) also gradually increases from the middle to both ends. Therefore, the air flow channel always adapts to the physical law of the increasing volume flow rate of natural convection air, reducing the natural convection flow resistance and enhancing the convective heat transfer intensity. And because the arc-shaped heat dissipation fins 111 are in a hyperbolic configuration, during the process of air flowing in the flow channel, the air flow direction is continuously changed, thus generating a centripetal motion. The air is squeezed due to a little centrifugal force (inertia), and when it moves to the position of the transverse turbulence port 117, a small amount of air is squeezed into the transverse turbulence port 117 and enters the adjacent flow channel on the side closer to the center. This process generates disturbances in two places. First, when the air in the flow channel flows through the transverse turbulence port 117, the velocity boundary layer is disturbed to a certain extent, increasing the air mixing intensity in the boundary layer and reducing the thickness of the thermal boundary layer, thereby enhancing the local heat transfer to a certain extent. Second, the small amount of air flowing into the transverse turbulence port 117 disturbs the air in the adjacent flow channel, and the disturbance of the velocity boundary layer causes an increase in the local heat transfer intensity in this flow channel. At the same time, the transverse turbulence ports 117 are gradually densified from the middle to both ends, which also solves the problem pointed out in the previous description that the velocity and thermal boundary layers continuously increase when air flows along the flow channel to both sides in natural convection, hindering the convective heat transfer intensity.

[0059] The above measures can increase the natural heat dissipation intensity of the mobile satellite communication antenna 100 provided in this embodiment by nearly 30% compared with the traditional radiator of the same size scale.

[0060] The mobile satellite communication antenna 100 provided in the embodiment of the present invention undergoes relative motion with air when the vehicle is in motion. At this time, the air flow is equivalent to adding a driving force, which belongs to forced convective heat transfer, and the heat transfer intensity itself has increased by an order of magnitude. Therefore, if there are no overheating or failure accidents of the components of the mobile satellite communication array antenna under natural heat dissipation conditions (i.e., in a stationary state) in the same working mode, there is generally no problem under forced convective heat transfer conditions (i.e., in a moving state). However, if the mobile satellite communication antenna 100 changes its working mode during motion, resulting in an increase in the power heat dissipation of the device, then the heat dissipation under the moving state also deserves to be strengthened.

[0061] When the vehicle is in motion, the static air pressure at the first flow port 171 of the antenna 100 for communication while in motion increases, and the air is "forced into" the interior of the flow channel for forced convection heat transfer. When the high-speed air flows into the arc-shaped flow channel, its flow direction changes, generating a relatively strong centrifugal motion, which causes the air on the centrifugal side to be significantly compressed and the pressure to increase, while the pressure of the air on the centripetal side decreases. A part of the air on the centrifugal side enters the adjacent flow channel closer to the center through the transverse turbulence port 117, generating air flow disturbances and enhancing the heat transfer. Another part of the air on the centrifugal side has a tendency to flow towards the centripetal side due to the significantly increased pressure, thus forming a secondary circulation. The secondary circulation is combined with the main air flow to strengthen the convective heat transfer.

[0062] The above measures can increase the forced convection heat transfer intensity of the antenna 100 for communication while in motion by nearly 15% compared with the traditional radiator of the same size and material scale.

[0063] When the vehicle is in motion, the air enters the flow channel from the first flow port 171, and the flow area of the flow channel first decreases and then increases, reaching the minimum at the center position of the arc-shaped cold plate 110. This causes the air flow velocity to first increase and then decrease, forming a velocity peak at the position where the flow area of the arc-shaped cold plate 110 is the smallest. At the same time, since the flow channel changes the air flow direction, the air flow entering the flow channel forms a centrifugal motion. The water droplets or sand grains with a larger density also have a larger inertia. When they flow to the bottom liquid discharge hole 153 along with the air, they are "thrown out" of the cold plate to achieve the purpose of liquid discharge and dust removal. In addition, the top 200 of the vehicle is usually an arc-shaped curved surface, forming a radiator outer flow region that is large on both sides and small in the middle with the arc-shaped diversion cover (the bottom area of the phased array antenna for communication while in motion). In this flow region, the velocity of the high-speed air increases in the throat region. According to Bernoulli's principle, the increase in air velocity leads to a decrease in its static pressure. The effect of this phenomenon is to generate an additional suction effect on the water droplets or sand grains at the liquid discharge port of the radiator, further enhancing the liquid discharge and dust removal effect of the radiator.

[0064] In summary, the antenna 100 for communication while in motion provided in this embodiment can ensure that the heat dissipation effects in the stationary state and the motion state meet the requirements. At the same time, it can solve the problems of water accumulation and dust accumulation, ensure the heat dissipation efficiency, and avoid the electrochemical corrosion caused by raindrop accumulation inside.

[0065] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A mobile satellite communication antenna, characterized in that, It includes an antenna body, an arc-shaped cold plate, a top plate and a cold plate cover. The antenna body is arranged on the upper side surface of the arc-shaped cold plate. The top plate covers the antenna body. The cold plate cover is arranged on the lower side of the arc-shaped cold plate. The lower side surface of the arc-shaped cold plate is an arc-shaped curved surface structure and protrudes downward. A heat dissipation channel is formed between the upper side surface of the cold plate cover and the lower side surface of the arc-shaped cold plate. A first flow port and a second flow port are respectively arranged at two ends of the arc-shaped cold plate. Two ends of the heat dissipation channel are respectively communicated with the first flow port and the second flow port, and a guide flow hole communicated with the heat dissipation channel is formed in the cold plate cover; The upper side surface of the cold plate cover is also an arc-shaped curved surface structure, so that the heat dissipation channel is arc-shaped. The curvature of the upper side surface of the cold plate cover is less than or equal to the curvature of the lower side surface of the arc-shaped cold plate, so that the width of the middle part of the heat dissipation channel is less than or equal to the width of the two ends of the heat dissipation channel; A plurality of heat dissipation fins are further arranged on the lower side surface of the arc-shaped cold plate. The cold plate cover is mounted outside the plurality of heat dissipation fins. The plurality of heat dissipation fins divide the heat dissipation channel into a plurality of flow channels. Two ends of each flow channel are respectively communicated with the first flow port and the second flow port.

2. The mobile communication antenna according to claim 1, wherein, A drain hole is formed in the middle of the cold plate cover. The guide flow hole is formed on at least one side of the drain hole, and the distance between the drain hole and the top plate is greater than the distance between the guide flow hole and the top plate.

3. The mobile communication antenna according to claim 1, wherein The width of each flow channel gradually increases in the direction from the middle to both ends.

4. The mobile communication antenna according to claim 1, wherein, A transverse flow disturbing port is formed in each heat dissipation fin, and the transverse flow disturbing port is used for communicating two adjacent flow channels.

5. The mobile communication antenna according to claim 4, characterized in that, There are a plurality of the transverse flow disturbing ports, and the distance between two adjacent transverse flow disturbing ports gradually decreases in the direction from the middle to both ends of the heat dissipation fin.

6. The mobile communication antenna according to claim 4, characterized in that, The opening area of the transverse flow disturbing port gradually increases in the direction from the middle to both ends of the heat dissipation fin.

7. The mobile communication antenna according to claim 1, characterized in that, A guide groove opening is formed in the middle of each heat dissipation fin. A plurality of the guide groove openings together form a diversion groove, and the diversion groove is located in the middle of the lower side surface of the arc-shaped cold plate.

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