Sparse Gradient Dielectric Lens for Wide-Angle Antenna Coverage
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Solution Overview
Problem
Traditional single radiator antennas for Inmarsat Band frequencies struggle to achieve a wide field of view (+ or −75 degrees) while maintaining compactness and efficiency, leading to suboptimal reception and compromised communication integrity in satellite communication systems.
Innovation Solution
A compact antenna assembly utilizing a substrate stack with a magnetodielectric material and a gradient dielectric cover, featuring a first and second lens portion with different dielectric constants, enhances the field of view to + or −80 degrees, achieving improved signal reception and reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radiator antenna design is used, then the antenna structure remains simple and compact, but the field of view is insufficient to achieve the required + or −75 degrees coverage
Solution Approach 1:
A dielectric cover with gradient lens is introduced as an intermediary component between the single radiator antenna and the surrounding environment. The gradient lens, with its varying dielectric constant from center to edge, acts as a mediator that bends and redirects electromagnetic waves, enabling the single radiator to achieve a wide field of view (+ or −80 degrees) without requiring multiple radiators or complex configurations.
2Adaptability or versatility
If multiple radiators are employed to achieve wide field of view and frequency band performance, then the field of view and signal reception quality improve, but the antenna size and weight increase
Solution Approach 1:
The dielectric cover with gradient lens serves as a compact intermediary that enables a single lightweight radiator to achieve the performance previously requiring multiple heavy radiators. The gradient lens focuses and directs electromagnetic energy efficiently, providing wide field of view coverage without the weight penalty of multiple radiator elements.
Solution Approach 2:
The gradient lens utilizes a continuous variation of the dielectric constant parameter from the center to the edge of the lens. This parameter change allows precise control of electromagnetic wave propagation, enabling a single radiator to achieve wide angular coverage and frequency band performance that would traditionally require multiple radiators, thereby reducing overall antenna weight.
3Adaptability or versatility
If multiple radiators are configured to meet field of view requirements, then communication coverage improves, but the physical footprint and installation complexity increase
Solution Approach 1:
The dielectric cover with gradient lens is a compact intermediary component that enables a single radiator to achieve wide field of view coverage. This eliminates the need for multiple spaced-apart radiator elements, significantly reducing the physical footprint and simplifying installation while maintaining + or −80 degrees field of view coverage.
4Area of stationary object
If a single radiator antenna is used, then the antenna remains compact and easy to install, but signal reception quality deteriorates in diverse operational scenarios
Solution Approach 1:
The dielectric cover with gradient lens acts as an intermediary that enhances the performance of a single compact radiator. By strategically bending and directing electromagnetic waves through the gradient dielectric structure, it improves signal reception quality across diverse angles and operational scenarios, maintaining reliability without requiring a larger or more complex antenna array.
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 antenna assembly provides a wider field of view and improved signal reception in L-band frequencies, maintaining communication integrity with reduced bulk and complexity, suitable for applications where space is limited.
Implementation Method 1
The gradient lens includes a first lens portion having a first dielectric constant, DkL1, and a second lens portion having a second dielectric constant, DkL2, different from the first dielectric constant, DkL1
Data Source
AI summary
An antenna assembly includes a substrate stack 105 comprising a magnetodielectric material, at least one patch radiating element 102 on an upper surface of the substrate stack 105, and a dielectric cover 200 including a gradient lens 204 disposed over the substrate stack 105. The gradient lens 204 includes a first lens portion having a first dielectric constant, DkL1, and a second lens portion having a second dielectric constant, DkL2, different from the first dielectric constant, DkL1.