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Antenna electromagnetic radiation steering system

A technology of electromagnetic radiation and steering system, applied in the field of radome

Active Publication Date: 2016-05-11
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of such large aperture antennas and associated electronics and / or mechanical gimbal heads are not used on aerospace vehicles (e.g., aircraft) due to size and / or weight

Method used

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  • Antenna electromagnetic radiation steering system
  • Antenna electromagnetic radiation steering system
  • Antenna electromagnetic radiation steering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Embodiment 1: Cylindrical Radome

[0099] refer to Figure 20 One specific, non-limiting example of the disclosed system 100 may include a standard half-wavelength dipole antenna 102 in a substantially vertical orientation enclosed within a cylindrical radome 106 . As used herein, "half wave" means that the length of the dipole antenna is substantially equal to half the wavelength of the electromagnetic radiation (eg, radio waves) emitted from the antenna 102 at the operating frequency. Antenna 102 may be placed substantially in the center of cylindrical radome 106 .

[0100] The length L3 (eg, vertical height) of antenna 102 may be set (eg, may be equal to) a half wavelength of electromagnetic radiation 104 at a predetermined (eg, desired) operating frequency. In this specific, non-limiting example, the length L3 of antenna 102 may be approximately 3.9 inches and the operating frequency (eg, of system 100 ) may be approximately 1515 MHz (or 1.5 GHz).

[0101] The le...

Embodiment 2

[0110] Example 2: Conical Radome

[0111] refer to Figure 28 Another specific, non-limiting example of the disclosed system 100 may include a standard half-wavelength dipole antenna 102 in a substantially vertical orientation enclosed within a conical radome 106 . Antenna 102 may be placed substantially in the center of conical radome 106 .

[0112] The length L3 (eg, vertical height) of antenna 102 may be set (eg, may be equal to) a half wavelength of electromagnetic radiation 104 at a predetermined (eg, desired) operating frequency. In this specific, non-limiting example, the length L3 of the antenna 102 may be approximately 3.9 inches and the operating frequency may be approximately 1515 MHz (or 1.5 GHz).

[0113] The length L2 (eg, vertical height) of the conical radome 106 may be approximately ten percent greater than the length L3 of the antenna 102 . In this specific, non-limiting example, the length L2 of the conical radome 106 may be approximately 4.3 inches.

[...

Embodiment approach

[0123] Item 1. An antenna electromagnetic radiation steering system comprising: an antenna for emitting electromagnetic radiation; and a radome disposed adjacent to and at least partially surrounding the antenna, the radome comprising The electromagnetic radiation is passed to a window external to the radome, wherein the electromagnetic radiation is oriented based on a position of the window relative to the antenna.

[0124] Item 2. The system of item 1, wherein the radome is rotatable about at least one axis of rotation.

[0125] Item 3. The system of item 1, wherein the window comprises an aperture in the radome.

[0126] Item 4. The system of item 1, wherein the window comprises an electromagnetically transmissive material formed in the radome.

[0127] Item 5. The system of item 1, wherein the window comprises a pattern of electromagnetic transmissive features.

[0128] Item 6. The system of item 5, wherein the electromagnetic transmissive feature comprises a two-dimensi...

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PUM

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Abstract

An antenna electromagnetic radiation steering system may include an antenna for emitting electromagnetic radiation, and a radome disposed adjacent to and at least partially enclosing the antenna, the radome including a window to pass electromagnetic radiation from the antenna to outside the radome, wherein electromagnetic radiation is directed based on a position of the window relative to the antenna.

Description

technical field [0001] The present disclosure relates generally to a radome and, more particularly, to a movable radome having a window transmissive to radio waves within a predetermined frequency band. Background technique [0002] Vehicles such as airplanes, marine vehicles, land vehicles, and spacecraft typically use long wavelength omnidirectional antennas for long-range communications. Because these omnidirectional antennas have low gain, radio waves (eg, radio signals) transmitted through these antennas can be easily detected and / or intercepted due to their indiscriminate radiation patterns. Therefore, high directional antenna gain is desirable for long-range communications. [0003] High gain antenna directivity can be achieved using various techniques, such as using a phased array antenna, using a dish or horn antenna, or using a large aperture directional antenna. However, directional antennas for longer wavelengths are difficult to implement using conventional ar...

Claims

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Application Information

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IPC IPC(8): H01Q1/42H01Q3/20
CPCH01Q3/14H01Q3/20H01Q15/16H01Q19/10H01Q1/428H01Q1/42H01Q1/085H01Q1/005H01Q15/14
Inventor 罗纳德·O·拉文迈克尔·M·洛尔
Owner THE BOEING CO