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Lightning protection radome system

A radome and antenna technology, applied in the field of radomes, can solve problems such as electromagnetic pulses and radar antennas being vulnerable to lightning strikes

Active Publication Date: 2015-09-09
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, such a window renders the radar antenna vulnerable to lightning strikes and electromagnetic pulses

Method used

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  • Lightning protection radome system
  • Lightning protection radome system
  • Lightning protection radome system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (radome tuned to X-band)

[0062] designed as figure 2 Fifteen-layer radome shown. Table 1 provides composition and thickness data.

[0063] Table 1

[0064]

[0065]

[0066] Uses a proprietary aerospace flight-tested resin-impregnated fiberglass cloth. The resin-impregnated fiberglass cloth layers (outer skin layers 42A, 42B, 42C, 42D and inner skin layers 46A, 46B, 46C, 46D) have a dielectric constant (dimensionless; measured at room temperature and 1 kHz) of approximately 3.3.

[0067] Using special aerospace flight tested syntactic foam. The syntactic foam layers (spacer layers 44A, 44B) have a dielectric constant (dimensionless; measured at room temperature and 1 kHz) of approximately 1.9.

[0068] The artificial dielectric layer is configured as Figure 3A An array of metal diaphragms is shown. The size and spacing of the diaphragms in the array provides an effective capacitance of approximately 0.5 pF per artificial dielectric layer.

[0069] Th...

Embodiment 2

[0072] (radome tuned to K U frequency band)

[0073] designed as figure 2 Fifteen-layer radome shown. Table 2 provides composition and thickness data.

[0074] Table 2

[0075]

[0076]

[0077] The same dedicated aerospace flight test resin-impregnated fiberglass cloth used in Example 1 was also used in Example 2. The resin-impregnated fiberglass cloth layers (outer skin layers 42A, 42B, 42C, 42D and inner skin layers 46A, 46B, 46C, 46D) have a dielectric constant (dimensionless; measured at room temperature and 1 kHz) of approximately 3.3.

[0078] The specialized aerospace flight-tested syntactic foam used in Example 1 was also used in Example 2. The syntactic foam layers (spacer layers 44A, 44B) have a dielectric constant (dimensionless; measured at room temperature and 1 kHz) of approximately 1.9.

[0079] The artificial dielectric layer is configured as Figure 3A An array of metal diaphragms is shown. The size and spacing of the diaphragms in the array of...

Embodiment 3

[0083] (radome tuned to K A frequency band)

[0084] designed as figure 2 Fifteen-layer radome shown. Table 3 provides composition and thickness data.

[0085] table 3

[0086]

[0087]

[0088] The same dedicated aerospace flight test resin impregnated fiberglass cloth used in Examples 1 and 2 was also used in Example 3. The resin-impregnated fiberglass cloth layers (outer skin layers 42A, 42B, 42C, 42D and inner skin layers 46A, 46B, 46C, 46D) have a dielectric constant (dimensionless; measured at room temperature and 1 kHz) of approximately 3.3.

[0089] The specialized aerospace flight tested syntactic foam used in Examples 1 and 2 was also used in Example 3. The syntactic foam layers (spacer layers 44A, 44B) have a dielectric constant (dimensionless; measured at room temperature and 1 kHz) of approximately 1.9.

[0090] The artificial dielectric layer is configured as Figure 3A An array of metal diaphragms is shown. The size and spacing of the diaphragms i...

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PUM

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Abstract

A radome system including an antenna, the antenna operating within a predetermined frequency band, and a radome defining an enclosed volume, wherein the antenna is housed within the enclosed volume, the radome including a layered structure having an external surface and an internal surface, the layered structure including an external structural layer proximate the external surface and a core layer below the external structural layer, the core layer including a Faraday cage layer positioned between artificial dielectric layers.

Description

technical field [0001] The present application relates to a radome, and more particularly to a radome, which is transparent to radio waves within a predetermined frequency band and also protects antennas and electronic equipment enclosed behind the radome from lightning strikes and electromagnetic pulses. Background technique [0002] Antennas include delicate components that can be damaged when exposed to ambient environmental conditions. Accordingly, antennas are often housed in a radome, which prevents physical matter, such as debris, precipitation, air currents, etc., from directly physically contacting the antenna assembly. Thus, the radome acts as a physical shield from potentially hazardous materials while still allowing the propagation of electromagnetic radiation, particularly radio waves, to and from the protected antenna. [0003] Vehicles, such as airplanes, watercraft, land vehicles, and spacecraft, typically use radar for various purposes, such as weather and / ...

Claims

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Application Information

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IPC IPC(8): H01Q1/42
CPCH01Q1/422H01Q1/526B32B15/04B64D45/02H01Q1/50H01Q15/0006H01Q1/424H01Q1/425Y10T29/49018
Inventor M·M·洛尔
Owner THE BOEING CO
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