Rotating Radome Window Antenna Gain Control
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Solution Overview
Problem
High-gain directional antennas are difficult to implement on aerospace vehicles due to size and weight constraints, and traditional radomes may not provide sufficient protection and directional control for omnidirectional antennas, especially in harsh environments.
Innovation Solution
A radome system with a movable, electromagnetically transparent window that rotates to direct electromagnetic radiation, incorporating an electromagnetically reflective surface to increase gain by reflecting radiation back towards the window, allowing for directional control of electromagnetic radiation emitted by an omnidirectional antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional large aperture directional antennas or phased arrays are used, then high-gain directional radiation is achieved, but size and weight increase making them unsuitable for aerospace vehicles
Solution Approach 1:
The patent places the omnidirectional antenna inside a radome structure, nesting the antenna within a protective enclosure that also serves as the directional control mechanism. The radome acts as an outer shell containing the antenna, with the window aperture providing directional control without requiring large external aperture structures.
Solution Approach 2:
The radome with its electromagnetically transparent window serves as an intermediary between the omnidirectional antenna and the external environment. The window aperture acts as a mediator that shapes and directs the electromagnetic radiation without requiring modification of the antenna itself or use of complex phased array electronics.
2Adaptability or versatility
If omnidirectional antennas are used for long-range communication, then coverage is provided, but radiation pattern is indiscriminate making signals easy to detect and intercept
Solution Approach 1:
The radome window can be rotated or repositioned to dynamically change the directional pattern of the antenna. This allows the system to adapt between omnidirectional coverage when needed and directional beaming for secure communication, transforming a static omnidirectional radiator into a dynamically controllable system.
Solution Approach 2:
The radome window creates a localized aperture in an otherwise enclosed structure. By controlling the position and orientation of this local aperture, the system achieves directional radiation while the rest of the radome structure remains intact and protective, applying local modification to achieve global functional change.
3Ease of operation
If antennas are exposed to ambient conditions, then direct physical contact with environment occurs, but delicate antenna components may be damaged by debris, precipitation and moving air
Solution Approach 1:
The radome structure provides beforehand protection by enclosing the antenna components within a protective shell before environmental damage can occur. The radome acts as a cushioning barrier that absorbs and deflects environmental hazards such as debris, precipitation, and aerodynamic forces, protecting the delicate antenna components in advance.
Solution Approach 2:
The radome is constructed as a shell structure with an electromagnetically transparent window that physically encloses the antenna. This shell provides mechanical protection while maintaining electromagnetic functionality, using a thin-walled protective enclosure that allows radio wave passage while blocking physical environmental hazards.
4Reliability
If radomes are used to protect antennas, then physical protection is provided, but aerodynamic drag and environmental sensitivity remain concerns
Solution Approach 1:
The radome is designed with a streamlined, curved exterior shape that reduces aerodynamic drag by allowing smooth airflow over the structure. The curved surfaces minimize turbulence and pressure drag, making the protected antenna system more aerodynamically efficient while maintaining protective enclosure functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances antenna gain by concentrating electromagnetic radiation into a specific direction, providing protection to the antenna from environmental hazards while maintaining aerodynamic efficiency and mechanical strength.
Implementation Method 1
a window to pass electromagnetic radiation from the antenna to outside the radome
Implementation Method 2
reflecting electromagnetic radiation directed away from the window back toward the window to increase the gain of the electromagnetic radiation passing through the window
Data Source
AI summary
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.