Low-Profile Conformal Antenna Surface Flexibility
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Solution Overview
Problem
Existing phased array antennas are complex, expensive, and not flexible for use across multiple surfaces due to susceptibility to electromagnetic effects from conductive surfaces, and they face a trade-off between thickness and bandwidth, limiting their conformal applications on non-planar surfaces.
Innovation Solution
A low-profile conformal antenna (LPCA) is developed using a dielectric structure with an inner conductor and patch antenna element, configured to support TEM signals, and fabricated through lamination or 3-D additive printing, which is surface-agnostic and circularly polarized to minimize polarization losses and increase bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing phased array antennas are integrated into conductive surfaces, then antenna functionality is achieved, but electromagnetic effects from the surface degrade performance and reduce flexibility across multiple surfaces
Solution Approach 1:
A dielectric layer is introduced as an intermediary between the conductive surface and the antenna elements. This dielectric layer isolates the antenna from direct electromagnetic interaction with the conductive surface, eliminating surface-induced performance degradation while maintaining electrical connection through conductive paste or metalization layers on the dielectric substrate.
Solution Approach 2:
The antenna system is segmented into distinct functional layers: a dielectric substrate layer that provides mechanical support and electrical isolation, conductive trace layers for signal transmission, and radiating elements. This segmentation allows each layer to be optimized independently, with the dielectric layer protecting against surface effects while conductive layers maintain electrical functionality.
2Length of stationary object
If antenna thickness is reduced to achieve low-profile and conformal characteristics, then flexibility and visual intrusion are minimized, but bandwidth is narrowed
Solution Approach 1:
The antenna employs a composite structure combining dielectric material for substrate support with conductive paste or thin metal layers for electrical functionality. This composite approach enables the antenna to maintain electrical performance and bandwidth characteristics while achieving reduced overall thickness through the use of thin dielectric substrates and paste-based conductors.
Solution Approach 2:
The invention changes the physical parameters of the antenna components, specifically using thin dielectric layers with optimized permittivity values and controlled conductor trace geometries. By adjusting dielectric constant, layer thickness, and trace width, the antenna achieves low-profile dimensions while maintaining resonant frequency and bandwidth requirements through parameter optimization.
3Reliability
If existing antennas are designed for specific surface shapes and materials, then performance on those surfaces is optimized, but complexity increases and flexibility for multiple surfaces is lost
Solution Approach 1:
The antenna design uses a universal dielectric substrate structure that can be applied to any surface geometry or material composition. The dielectric layer serves multiple functions: mechanical support, electrical isolation from conductive surfaces, and signal transmission medium. This universal approach allows the same antenna design to be deployed on aircraft fuselages, vehicle bodies, or building surfaces without redesign, eliminating the need for surface-specific optimizations.
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 LPCA achieves efficient signal propagation, flexibility across different surfaces, and enhanced bandwidth while minimizing the impact of surface type, making it suitable for conformal applications on non-planar surfaces with reduced visual intrusion and radar cross-section.
Implementation Method 1
The LPCA is configured to support a transverse electromagnetic ("TEM") signal within the dielectric structure
Implementation Method 2
laminating the bottom surface of the second dielectric layer to the top surface of the first dielectric layer
Data Source
AI summary
A low-profile conformal antenna (“LPCA”) is disclosed. The LPCA includes a plurality of dielectric layers forming a dielectric structure. The plurality of dielectric layers includes a top dielectric layer that includes a top surface. The LPCA further includes an inner conductor, a patch antenna element (“PAE”), and an antenna slot. The inner conductor is formed within the dielectric structure, the PAE is formed on the top surface of the top dielectric layer, and the antenna slot is within the PAE. The LPCA is configured to support a transverse electromagnetic (“TEM”) signal within the dielectric structure.