Stepped RF Reflector Antenna Aperture Depth Trade-off
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Solution Overview
Problem
Traditional RF reflector antennas require a significant increase in depth to enlarge the RF aperture, limiting their compactness and versatility in various applications.
Innovation Solution
A stepped RF main reflector antenna system is designed with an inner RF reflector and multiple annular RF reflectors, each with different focal lengths but sharing the same focal plane, allowing for a larger RF aperture without a proportional increase in depth by using the inner reflector in the central opening of the annular reflectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the aperture of a traditional RF reflector antenna is increased, then the depth must be correspondingly increased, but this increases the overall size and reduces compactness
Solution Approach 1:
The reflector antenna is divided into multiple discrete reflector elements (first reflector, second reflector, third reflector) positioned at different depths. Each reflector element contributes to the overall aperture while having its own optimized depth, allowing the aperture to be enlarged without proportionally increasing the maximum depth of the entire antenna structure.
Solution Approach 2:
The patent transitions from a single-plane reflector to a multi-plane three-dimensional structure. By positioning reflector elements at different depths (z-dimension) rather than all at one depth plane, the antenna achieves a larger effective aperture area while maintaining a more compact maximum depth through spatial distribution in the depth dimension.
2Area of stationary object
If multiple reflectors with different focal lengths are used to increase aperture, then the structural complexity increases, but this may compromise manufacturing ease
Solution Approach 1:
Each reflector element is designed with specific local properties (different focal lengths, different positions) optimized for its particular role in the multi-reflector system. The first reflector has a first focal length, the second reflector has a second focal length, and the third reflector has a third focal length, allowing each element to contribute optimally to the overall aperture while maintaining manageable individual component complexity.
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
This configuration enables a larger RF aperture with reduced depth, enhancing the antenna's compactness and applicability in diverse settings such as wireless communication systems, spacecraft, and mobile platforms.
Implementation Method 1
The inner RF reflector antenna can have an RF reflecting surface with a first focal length to a focal plane, and the first annular RF reflector antenna can have a first annular RF reflecting surface with a second focal length to the focal plane
Data Source
AI summary
Stepped radio frequency (RF) reflector antennas are disclosed in which an inner RF reflector is disposed in a central opening of at one or more annular RF reflectors. The RF reflecting surface of the inner RF reflector and the RF reflecting surface(s) of the one or more annular RF reflectors can be shaped and positioned relative to each other to have different focal lengths but nevertheless reflect an RF signal to the same focal plane. The depth of the inventive reflector antenna system can be less than the depth of prior art reflector antennas with a comparable RF aperture.