Reconfigurable Biconical Reflector for Switchable Beam Patterns
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Solution Overview
Problem
Existing antennas require multiple units to achieve both narrow directive and omnidirectional beam patterns, which is cumbersome due to weight and space constraints, and reconfigurability between antenna types is lacking.
Innovation Solution
A reconfigurable reflector system for biconical antennas that alters radiation characteristics by switching between reflectors with different curvatures, allowing the same antenna to produce both fan and narrow beam projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used to achieve both narrow directive and omnidirectional beam patterns, then the radiation pattern versatility is improved, but the weight and space requirements increase
Solution Approach 1:
A single biconical antenna is designed to perform multiple functions by switching between different reflector configurations. The antenna can produce both omnidirectional and narrow directive beam patterns using the same physical structure, eliminating the need for multiple separate antennas and reducing overall system weight
Solution Approach 2:
The reflector configuration is made dynamically reconfigurable through mechanical adjustment mechanisms. The reflector can be tilted or repositioned to change the radiation pattern from omnidirectional to narrow directive, allowing the antenna system to adapt its beam shape on-demand without physical replacement of components
2Adaptability or versatility
If multiple antennas are used to achieve different beam patterns, then the radiation pattern versatility is improved, but the space and complexity increase
Solution Approach 1:
The same biconical antenna structure serves multiple beam pattern functions through reflector reconfiguration. This universal design consolidates what would otherwise require multiple specialized antennas, reducing system complexity while maintaining the ability to generate both omnidirectional and directive patterns
Solution Approach 2:
The antenna system is segmented into separable components: the biconical antenna element and the adjustable reflector. This modular segmentation allows the reflector to be independently reconfigured or replaced to change beam patterns, simplifying the overall system architecture compared to integrated multi-antenna solutions
3Ease of manufacture
If a fixed reflector configuration is used, then the manufacturing and deployment is simplified, but the beam pattern reconfigurability is limited
Solution Approach 1:
The reflector is designed with dynamic adjustability through mechanical mounting structures that enable tilting or repositioning. This dynamic capability allows the same manufactured reflector to serve multiple beam pattern configurations, bridging the gap between manufacturing simplicity and operational versatility
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
Enables flexible beam patterns with high gain and low distortion across various bandwidths, providing efficient use of space and reducing the need for multiple antennas.
Implementation Method 1
a reconfigurable reflector system for biconical antennas that alters radiation characteristics by switching between reflectors with different curvatures
Data Source
AI summary
An apparatus comprising a biconical antenna for generating an omnidirectional beam pattern is presented. A reflector reflects the omnidirectional beam pattern from the biconical antenna into a predetermined beamform. The reflector comprises a ground plane connected to the biconical antenna and a parabolic reflector extending from the ground plane at a predetermined angle. A curvature of the parabolic reflector reflects the omnidirectional beam pattern into the predetermined beam form. The predetermined angle corrects for beam shift of the predetermined beam form caused by the ground plane.