Frequency-Scanning Antenna With Hollow Conductor
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Solution Overview
Problem
Current frequency-scanning antennas are complex, expensive, and offer suboptimal directional characteristics and beam bundling, making them inefficient for radar systems that require modifiable and cost-effective solutions.
Innovation Solution
An antenna design featuring a hollow conductor with first antenna elements along a straight line, coated with conductive material on an electrically insulating substrate, allowing for cost-effective production and improved radiation characteristics through optimized antenna configurations and additional antenna elements for enhanced focusing and side lobe attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional frequency-scanning antennas are used, then directional radiation capability is achieved, but device complexity and production cost increase significantly
Solution Approach 1:
The antenna body is divided into multiple segments along a straight line, each containing antenna elements. This segmentation allows the complex radiation pattern to be constructed from simpler individual elements, reducing overall design complexity while maintaining directional performance through controlled interference of the segmented radiations.
Solution Approach 2:
The hollow conductor is nested within the antenna body, creating a compact structure where the conductor serves dual purposes as both structural support and radiation element. This nesting eliminates the need for separate support structures, reducing device complexity while preserving directional radiation characteristics.
2Ease of manufacture
If conventional frequency-scanning antennas are used, then frequency-dependent radiation direction is achieved, but production cost increases
Solution Approach 1:
The antenna elements are designed with specific geometric parameters (sizes, spacing, orientations) that are optimized to achieve precise directional characteristics. By carefully controlling these parameters during manufacturing, the antenna achieves frequency-dependent beam steering with standard manufacturing tolerances, improving ease of manufacture while maintaining precision.
Solution Approach 2:
The antenna body combines dielectric material for structural support with conductive material for radiation elements. This composite approach allows the use of easily manufacturable materials while achieving the precise electromagnetic properties needed for accurate directional radiation, reducing both production cost and manufacturing difficulty.
3Ease of manufacture
If antenna elements are arranged along a straight line, then manufacturing simplicity is improved, but beam bundling capability deteriorates
Solution Approach 1:
While the overall antenna element arrangement follows a straight line for manufacturing simplicity, local variations in element properties (different sizes, orientations, or types at different positions) are introduced to enhance beam bundling. This local differentiation allows precise control of the radiation pattern without complicating the overall linear structure, maintaining ease of manufacture while improving beam quality.
Solution Approach 2:
The antenna design exploits frequency dynamics to achieve beam bundling along the linear arrangement. By varying the operating frequency, the relative phases and amplitudes of radiation from different linear elements change dynamically, enabling electronic beam steering and focusing without mechanical movement, thus maintaining manufacturing simplicity while achieving reliable beam bundling.
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
The design achieves improved radiation characteristics with significant side lobe attenuation and increased antenna gain, enabling efficient and cost-effective production while maintaining mechanical robustness and ease of processing.
Implementation Method 1
the antenna is designed to radiate a signal in a spatial direction that is a function of a frequency of the signal
Implementation Method 2
the hollow conductor may have at least one compensation structure, which is designed to compensate for any interference at the hollow conductor as a result of reflections at the first antenna elements
Implementation Method 3
The electrically conductive material may be applied by a physical vapor-phase deposition
Implementation Method 4
the output radiated by the first antenna elements interferes in such a manner that a side lobe attenuation of the radiated output amounts to more than 25 dB in the distant field
Data Source
AI summary
An antenna has an antenna body having a plurality of first antenna elements, which are disposed along a first straight line. A hollow conductor, which extends between the first antenna elements, is disposed in the antenna body. The first antenna elements are developed as openings running between the hollow conductor and a surface of the antenna body. The antenna is designed to radiate a signal in a spatial direction that is a function of a frequency of the signal. The antenna body has an electrically insulating material that is coated with a conductive material.