A floating ground antenna

Abstract

The application provides a floating ground antenna, which comprises a substrate, a first isolation plate, an antenna ceramic substrate, a pressing cover, a low noise amplifier, a second isolation plate and a sealing gasket; the first isolation plate is arranged on the upper surface of the substrate, the antenna ceramic substrate is installed on the substrate through the first isolation plate by means of screws, and a gap is arranged between the antenna ceramic substrate and the substrate; the outer part of the antenna ceramic substrate is provided with the pressing cover, and the pressing cover is used for pressing the antenna ceramic substrate; the lower surface of the substrate is provided with the second isolation plate, and the low noise amplifier is installed on the substrate by means of the second isolation plate and the sealing gasket. The antenna provided by the application realizes the floating ground effect in a narrow space, solves the problems that the antenna is easily interfered by other devices or damaged by strong electricity when flying with a carrier, realizes the double sealing installation of the exposed part and the built-in part of the antenna, and improves the air tightness and water tightness of the antenna.

Description

Technical Field

[0001] This invention belongs to the field of antenna technology, and particularly relates to a floating antenna. Background Technology

[0002] The navigation antenna is an important component of the navigation system. It is usually installed directly on the outer wall of the missile body and is susceptible to signal interference from other devices installed on the missile body, which can reduce the positioning capability of the navigation system. In addition, if the missile body encounters strong electricity during flight, it will damage the navigation system and its related systems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a small floating antenna. This invention improves the electromagnetic compatibility and resistance to strong electrical interference of navigation systems while ensuring smooth transmission of electromagnetic signals, and also meets the stringent installation requirements of projectiles.

[0004] To achieve the above objectives, the present invention provides a floating antenna, which includes a substrate, a first isolation plate, an antenna ceramic substrate, a clamping cover, a low-noise amplifier, a second isolation plate, and a sealing gasket;

[0005] The first isolation plate is disposed on the upper surface of the substrate, and the antenna ceramic substrate is mounted on the substrate by screws passing through the first isolation plate. A gap is provided between the antenna ceramic substrate and the substrate to achieve floating installation.

[0006] A clamping cover is provided on the outside of the antenna ceramic substrate, and the clamping cover is used to clamp the antenna ceramic substrate.

[0007] A second isolation plate is provided on the lower surface of the substrate, and the low-noise amplifier is floatingly mounted on the substrate through the second isolation plate and the sealing gasket.

[0008] In one possible implementation, the antenna further includes a waterproof cover that covers the outside of the clamping cover, and the edge of the waterproof cover is fixed to the substrate.

[0009] In one possible implementation, a first sealing ring is provided between the waterproof cover and the substrate; a second sealing ring is provided on the lower side of the substrate for sealing connection with the antenna carrier.

[0010] In one possible implementation, the upper surface of the substrate has a recessed stepped structure that conforms to the shape of the antenna ceramic substrate;

[0011] The lower surface of the substrate has a convex stepped structure, which provides a mounting platform for the low-noise amplifier.

[0012] The substrate has an opening on its lower surface to provide mounting space for the protruding structure of the low-noise amplifier.

[0013] In one possible implementation, the first isolation plate is a three-layer stepped structure, embedded in the steps on the upper surface of the substrate;

[0014] The dimensions around the first layer of the first isolation plate are larger than the outer dimensions of the antenna ceramic substrate, which, together with the clamping cover, isolates and floats the antenna ceramic substrate from the substrate.

[0015] The second step of the first isolation plate adapts to the convex structure on the lower surface of the antenna ceramic substrate, reserving installation space;

[0016] The third-layer opening step of the first isolation plate, in conjunction with the opening on the lower surface of the substrate, separates and isolates the antenna ceramic substrate from the substrate.

[0017] In one possible implementation, the sealing gasket is made of rubber and is placed between the low-noise amplifier and the substrate to provide a sealed installation and shock absorption between the low-noise amplifiers.

[0018] In one possible implementation, an insulating sleeve is provided outside the mounting screws of the low-noise amplifier.

[0019] In one possible implementation, the insulating sleeve is a cylindrical stepped structure, fitted inside the mounting hole of the low-noise amplifier and outside the mounting screw, isolating the metal mounting screw from the low-noise amplifier, and in conjunction with the isolation plate, achieving a floating fixation between the low-noise amplifier and the substrate.

[0020] In one possible implementation, the first sealing ring and the second sealing ring are respectively inserted into the sealing grooves on the upper and lower mounting surfaces of the substrate.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] 1. This invention connects the antenna ceramic substrate and the low-noise amplifier to the floating ground of the substrate, respectively, to achieve isolation between the radio frequency ground and the structural ground. This enables the navigation antenna to shield against signal interference from other devices or to avoid damage from high voltage, thereby improving the electromagnetic compatibility and anti-interference capability of the navigation system.

[0023] 2. By introducing a compression cap and a sealing gasket, this invention provides reinforcement and buffering for the antenna ceramic substrate and the low-noise amplifier, respectively, thereby improving the mechanical performance of the antenna structure, enabling it to adapt to harsh mechanical environments and ensuring high reliability.

[0024] 3. By introducing a waterproof cover, sealing ring, and sealing gasket, this invention enables the antenna to be installed in a sealed manner, thereby improving the airtightness and watertightness of the antenna and making it adaptable to harsh rain and humid environments.

[0025] 4. This invention solves the problems of antenna floating and sealing under limited space conditions, and has a simple and compact structure with low cost. Attached Figure Description

[0026] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 A schematic diagram of the external structure of a floating antenna provided for an exemplary embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of a floating antenna provided as an exemplary embodiment of the present invention. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0030] like Figure 1 and 2 As shown, this application provides a floating ground small antenna, which includes a substrate 1, a first isolation plate 2, an antenna ceramic substrate 3, a pressing cover 4, a first sealing ring 10, a waterproof cover 5, a low noise amplifier 6, a second isolation plate 7, a sealing gasket 8, an insulating sleeve 9, and a second sealing ring 11.

[0031] The mounting screws of the antenna ceramic substrate 3 pass through the first isolation plate 2 and are mounted on the substrate 1, realizing the isolation and floating of the antenna ceramic substrate 3 and the substrate 1; the clamping cover 4 presses the antenna ceramic substrate 3 tightly, located outside the antenna ceramic substrate 3 and inside the waterproof cover 5; the first sealing ring 10 is placed between the waterproof cover 5 and the substrate 1, and the waterproof cover 5 is sealed and fixedly mounted on the substrate 1; the low noise amplifier 6 is floating and sealed on the substrate 1 through the second isolation plate 7 and the sealing gasket 8; the insulating sleeve 9 is placed outside the mounting screws of the low noise amplifier 6, further realizing the floating and fixed low noise amplifier 6 and the substrate 1; the second sealing ring 11 is placed between the substrate 1 and the antenna carrier for the sealed installation of the antenna.

[0032] For example, substrate 1 is the main supporting structure of the present invention, providing mounting positions for all components. Specifically, the upper surface of substrate 1 is provided with mounting threaded holes, and a waterproof cover 5, a clamping cover 4, an antenna ceramic substrate 3, and a first isolation plate 2 are installed sequentially from the outside to the inside. The lower surface of substrate 1 is provided with mounting threaded holes, and a sealing gasket 8, a second isolation plate 7, and a low-noise amplifier 6 are installed sequentially from top to bottom.

[0033] The upper surface of the substrate 1 has a concave stepped structure, which is adapted to the shape of the antenna ceramic substrate 3; the lower surface of the substrate 1 has a convex stepped structure, which is used to provide a mounting platform for the low noise amplifier 6; the lower surface of the substrate 1 has an opening to provide mounting space for the convex structure of the low noise amplifier 6; the upper and lower surfaces of the substrate 1 are respectively provided with sealing ring mounting grooves to ensure the sealed installation of the waterproof cover 5 and the antenna.

[0034] The first isolation plate 2 is located between the antenna ceramic substrate 3 and the substrate 1, causing the antenna ceramic substrate 2 to float away from the substrate 1. The first isolation plate 2 has a three-layer stepped structure and is embedded in the steps on the upper surface of the substrate 1. The dimensions of the first open step of the first isolation plate 2 are larger than the outer dimensions of the antenna ceramic substrate 3, which, together with the clamping cover 4, isolates and floats the antenna ceramic substrate 3 from the substrate 1; the second step of the first isolation plate 2 adapts to the convex structure on the lower surface of the antenna ceramic substrate 3, reserving installation space; the third open step of the first isolation plate 2, together with the opening on the lower surface of the substrate 1, completely floats and isolates the antenna ceramic substrate 3 from the substrate 1.

[0035] The clamping cover 4 has an open cap-shaped structure, which presses down on the antenna ceramic substrate 3, further causing the antenna ceramic substrate 3 to float away from the substrate 1, and the clamping cover 4 enables the antenna ceramic substrate 3 to withstand high-level impacts.

[0036] The sealing gasket 8 is placed between the low-noise amplifier 6 and the substrate 1. On the one hand, it provides a sealed installation for the low-noise amplifier 6, and on the other hand, it provides shock absorption and cushioning for the low-noise amplifier 6, thereby improving mechanical reliability. Optionally, the sealing gasket 8 is made of rubber, but this application is not limited to rubber. Other materials that can achieve the same effect should also fall within the protection scope of this application.

[0037] The insulating sleeve 9 has a cylindrical stepped structure and is fitted inside the mounting hole of the low-noise amplifier 6 and outside the mounting screw, isolating the metal mounting screw from the low-noise amplifier 6. Together with the second isolation plate 7, it enables the low-noise amplifier 6 to be fixed to the substrate 1 in a floating manner.

[0038] In this application, the first isolation plate 2, the second isolation plate 7, the clamping cover 4, and the insulating sleeve 9 are made of non-metallic insulating materials. The first sealing ring 10 and the second sealing ring 11 are respectively inserted into the sealing grooves on the upper and lower mounting surfaces of the substrate 1, so that the antenna can meet the requirements of airtightness and watertightness.

[0039] In this invention, the first isolation plate, in conjunction with the compression cover structure, achieves a floating and fixed installation of the antenna ceramic substrate; the second isolation plate, combined with the sealing gasket and insulating sleeve, achieves a sealed and floating fixed installation of the low-noise amplifier; the first sealing ring, waterproof cover, and second sealing ring structure ensure the watertightness and airtightness of all parts of the antenna. The antenna of this invention achieves a floating effect in a confined space, solving the problems of antennas being easily interfered with by other equipment or damaged by high voltage when flying with a carrier; it achieves a dual-sealed installation of both the exposed and internal parts of the antenna, improving the airtightness and watertightness of the antenna. This invention has high integration, a compact structure, stable performance, and good sealing performance, and has broad application prospects.

[0040] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A floating antenna, characterized in that, The antenna includes a substrate, a first isolation plate, an antenna ceramic substrate, a clamping cover, a low-noise amplifier, a second isolation plate, and a sealing gasket; The first isolation plate is disposed on the upper surface of the substrate, and the antenna ceramic substrate is mounted on the substrate by screws passing through the first isolation plate. A gap is provided between the antenna ceramic substrate and the substrate to achieve floating mounting. A clamping cover is provided on the outside of the antenna ceramic substrate, and the clamping cover is used to clamp the antenna ceramic substrate. A second isolation plate is provided on the lower surface of the substrate, and the low noise amplifier is floatingly mounted on the substrate through the second isolation plate and the sealing gasket; The first isolation plate has a three-layer stepped structure and is embedded in the steps on the upper surface of the substrate; The dimensions around the first layer of the first isolation plate are larger than the outer dimensions of the antenna ceramic substrate, which, together with the clamping cover, isolates and floats the antenna ceramic substrate from the substrate. The second step of the first isolation plate adapts to the convex structure on the lower surface of the antenna ceramic substrate, reserving installation space; The third layer of the first isolation plate has an opening step that mates with the opening on the lower surface of the substrate, thereby separating and isolating the antenna ceramic substrate from the substrate. An insulating sleeve is provided outside the mounting screws of the low-noise amplifier; The insulating sleeve has a cylindrical stepped structure and is fitted inside the mounting hole of the low noise amplifier and outside the mounting screw, isolating the mounting screw from the low noise amplifier. Together with the isolation plate, it enables the low noise amplifier to be fixed to the substrate in a floating manner. The upper surface of the substrate has a recessed stepped structure, which is adapted to the shape of the antenna ceramic substrate; The lower surface of the substrate has a convex stepped structure, which provides a mounting platform for the low-noise amplifier. The lower surface of the substrate has an opening to provide mounting space for the protruding structure of the low-noise amplifier. The sealing gasket is placed between the low-noise amplifier and the substrate to provide a sealed installation and shock absorption for the low-noise amplifier. The antenna also includes a waterproof cover, and a first sealing ring is provided between the waterproof cover and the substrate; a second sealing ring is provided on the lower side of the substrate for sealing connection with the antenna carrier. The first sealing ring and the second sealing ring are respectively inserted into the sealing grooves on the upper and lower mounting surfaces of the substrate.

2. A floating antenna according to claim 1, characterized in that, The waterproof cover is disposed over the outside of the clamping cover, and the edge of the waterproof cover is fixed to the base plate.

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