Cone-Based Multi-Layer Antenna for Compact Low-Frequency Wideband Operation
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Solution Overview
Problem
Designing a compact wideband antenna that operates at low frequencies is challenging due to the size-frequency tradeoff, where achieving a small size while maintaining low operating frequencies and wideband coverage is difficult with conventional antennas.
Innovation Solution
A cone-based multi-layer antenna with a multi-layer structure, including a first layer conical structure and additional layers of conical structures, arranged to provide desired impedance and curvature, along with meander lines and a ground plane, to increase signal path length and reduce size while maintaining impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional antenna is designed to operate at low frequencies, then the antenna size needs to be relatively large, but this increases the overall antenna size which contradicts the requirement for compact antennas
Solution Approach 1:
The antenna is divided into multiple conical layers stacked vertically, with each layer contributing to the overall resonant frequency and impedance characteristics. This segmentation allows the antenna to achieve low operating frequencies through distributed capacitance and inductance across layers rather than requiring a single large structure
Solution Approach 2:
The patent transitions from a planar antenna structure to a three-dimensional multi-layer conical configuration. By stacking conical layers vertically and using meander lines that extend in multiple spatial dimensions, the antenna achieves increased electrical length and lower resonant frequencies within a compact footprint
2Adaptability or versatility
If a single conventional antenna is designed to cover a wide frequency range, then multiple different antennas are needed, but this increases device complexity
Solution Approach 1:
The multi-layer conical antenna structure is designed to operate across a wide frequency range by adjusting layer dimensions, spacing, and meander line configurations. A single antenna implementation can cover multiple frequency bands (e.g., L-band, S-band, C-band) making it universal for various communication applications without requiring multiple specialized antennas
Solution Approach 2:
The antenna achieves wideband operation through variable geometric parameters including conical layer heights, base radii, spacing between layers, and meander line dimensions. By optimizing these parameters, the antenna maintains impedance matching and resonant characteristics across different frequency ranges
3Volume of moving object
If the antenna size is reduced to make it compact, then the operating frequency increases, but this contradicts the requirement for low operating frequencies
Solution Approach 1:
Smaller conical layers are nested within or adjacent to larger conical layers, creating a compact vertical stacking configuration. This nesting allows the antenna to maintain reduced physical dimensions while the cumulative electrical length across nested layers sustains low resonant frequencies
Solution Approach 2:
The conical shapes with curved surfaces provide distributed capacitance and inductance that are more space-efficient than planar structures. The curvature allows electromagnetic fields to be concentrated and guided along the conical surfaces, achieving low resonant frequencies within a compact volume
4Adaptability or versatility
If multiple layers of conical structures are added to reduce size and increase bandwidth, then the device complexity increases, but this is necessary to achieve compact wideband performance
Solution Approach 1:
Multiple conical layers are combined into a single integrated antenna structure with shared ground plane and feed mechanism. The layers are electrically connected through meander lines that integrate the capacitive and inductive elements across layers, achieving wideband impedance matching while maintaining structural unity rather than treating each layer as a separate component
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 achieves wideband coverage with reduced size and low operating frequencies, ensuring high return loss and efficient energy transfer, making it suitable for applications where space is limited.
Implementation Method 1
a non-uniform meander line is arranged along the large scale virtual curvature
Implementation Method 2
the first layer conical structure has a height and a base radius configured to provide a desired impedance of the antenna
Implementation Method 3
a meander line structure is configured in the ground plane to form a resonating structure on the ground plane
Data Source
AI summary
A cone-based multi-layer wide band antenna is provided, including a cone-based member having a multi-layer structure. The multi-layer structure includes a first layer conical structure, and the first layer conical structure has a height and a base radius configured to provide a desired impedance of the antenna.